WO2013128090A2 - Holding clamp consisting of a device for locking and/or unlocking a tool head, such as a core bit - Google Patents

Holding clamp consisting of a device for locking and/or unlocking a tool head, such as a core bit Download PDF

Info

Publication number
WO2013128090A2
WO2013128090A2 PCT/FR2013/000057 FR2013000057W WO2013128090A2 WO 2013128090 A2 WO2013128090 A2 WO 2013128090A2 FR 2013000057 W FR2013000057 W FR 2013000057W WO 2013128090 A2 WO2013128090 A2 WO 2013128090A2
Authority
WO
WIPO (PCT)
Prior art keywords
holding
axis
clip
head
tool
Prior art date
Application number
PCT/FR2013/000057
Other languages
French (fr)
Other versions
WO2013128090A3 (en
Inventor
Emmanuel Bonte
Etienne BOSCH
Original Assignee
Technidrill
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technidrill filed Critical Technidrill
Priority to CA2869106A priority Critical patent/CA2869106A1/en
Priority to AU2013224833A priority patent/AU2013224833B2/en
Priority to EP13715267.4A priority patent/EP2820234A2/en
Publication of WO2013128090A2 publication Critical patent/WO2013128090A2/en
Priority to ZA2014/07151A priority patent/ZA201407151B/en
Publication of WO2013128090A3 publication Critical patent/WO2013128090A3/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B31/00—Fishing for or freeing objects in boreholes or wells
    • E21B31/12—Grappling tools, e.g. tongs or grabs
    • E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot

Definitions

  • Retaining clip constituting a device for locking and / or unlocking a head of a tool, such as a corer.
  • the invention relates to the general field of coring soil or rock, from a wellbore.
  • the invention relates more particularly to the field of tools for retrieving, gripping or releasing a tool, such as a corer or the like, in the wellbore. It relates to a holding clamp constituting a locking device and / or unlocking a head of the tool. It also relates to such a locking device and / or unlocking comprising at least two such holding clamps.
  • a corer In the field of coring, it is known to use a corer to take a sample of a soil, a rock or the like.
  • the corer is generally arranged in a tube defining an interior volume for receiving the sample to be taken.
  • the corer is composed of two parts: an inner part and an outer part.
  • the outer part consists mainly of tubes forming an envelope of the inner part, the latter being movable downhill and upward inside the wellbore to recover the sample.
  • the handling of the inner portion of the corer is effected by means of a locking and / or unlocking device which is interposed between the corer head and a handling cable.
  • the device for locking and / or unlocking the corer head.
  • the device is intended to reversibly grip the head of the corer, to allow the descent or the rise of the latter inside the wellbore.
  • the device is capable of being arranged in the gripping position of the corer head, in which the device maintains the latter.
  • the device can also be arranged in the disengaged position of the corer head, in which the device releases and / or releases the corer head.
  • the device comprises an elongated tube, holding clips and a locking sleeve.
  • the holding clips are pivotally mounted on the elongate tube.
  • the holding clips include respective first ends for gripping the corer head.
  • each holding clip has an end which is arranged in a point having a half-triangular section.
  • the tip comprises a contact face which is intended to bear against the head of the tool and a ramp between an edge of the contact face and an end edge.
  • the holding clips are organs that undergo significant mechanical stress and are therefore subject to regular wear which is detrimental.
  • the holding clips regularly suffer shocks with, and friction against, the head of the tool which amplifies their premature wear.
  • Such wear requires long and costly maintenance operations, which frequently involve the replacement of used holding clips with new holding clips, such a replacement proving to be binding.
  • An object of the present invention is to provide a holding clamp which is arranged to meet the aforementioned drawbacks, and which is particularly resistant to wear phenomena.
  • Another object of the present invention is to provide a locking device and / or unlocking which comprises at least a pair of such holding clamps, which is robust and durable and finally which is also optimized with respect to the safety of a operator, especially from a minimization of a risk of falling of a tool carried by means of such holding clamps.
  • a holding clamp of the present invention is a holding clamp constituting a locking device and / or unlocking a head of a tool.
  • the holding clip is extended along an axis of general elongation of the holding clip.
  • the holding clip includes a sliding ramp of the tool head.
  • the sliding ramp forms with the axis of general elongation an angle which is between 0 ° and 45 °.
  • the angle is advantageously between 0 ° and 30 °, or even between 0 ° and 15 °, or even between 0 ° and 5 °. According to a preferred variant, the angle is equal to 0 °.
  • the sliding ramp is advantageously shaped in a portion of a surface of revolution having a generatrix which is parallel to the general axis of elongation of the holding clip.
  • the sliding ramp preferably comprises a length that is between 30% and 100% of a thickness of a distal tip of the holding clip.
  • the sliding ramp is formed orthogonalemént to a support abutment that includes the holding clip.
  • the holding clip is advantageously provided with a distal orifice and a proximal orifice, each of which is of oblong shape and which are each longitudinally extended along a radial axis which is orthogonal to the general elongation axis.
  • the holding clip is advantageously provided with a connecting pin which is interposed between the distal orifice and the proximal orifice.
  • a device for locking and / or unlocking a head of a tool of the present invention is mainly recognizable in that said device comprises at least one pair of such holding clips.
  • each retaining clip is mounted to move in translation along the radial axis which is orthogonal to the general elongation axis of the retaining clip.
  • the holding clips are advantageously housed inside a cage formed at a distal end that comprises the locking device and / or unlocking.
  • Said device is advantageously extended along a general axis of extension which is parallel to the axis of general elongation of the holding clip.
  • clamps holding the same pair of holding clamps are preferably mounted diametrically opposite one another relative to the general axis of extension.
  • Figure 1 is a schematic view of a locking and / or unlocking device of the present invention in use.
  • Figure 2 is a schematic sectional view of a tool head to be locked and / or unlocked by said device shown in the previous figure.
  • FIG. 3 is a diagrammatic sectional view of the locking and / or unlocking device shown in FIG.
  • FIG. 4 is a partial schematic view in perspective of a distal end of said device illustrated in FIG. Figure 5 is a partial schematic view in perspective of the distal end of said device shown in Figure 4, said device being shown when introducing a head of a tool for its maintenance.
  • Figure 6 is a partial schematic perspective view of the distal end of said device shown in Figure 4, said device being shown after immobilization of the head of the tool.
  • the tool 1 is preferably a corer which is intended to take a core of rock, soil or the like. bottom of the wellbore 2.
  • the tool 1 is likely to be of a different nature without departing from the rules of the present invention which will be set forth.
  • the tool 1 is held by a locking and / or unlocking device 3 which is interposed between the tool 1 and a handling cable 4.
  • the handling cable 4 is in connection with a drive member 5, winch or the like, which is able to maneuver on descent and / or ascent the handling cable 4 , in particular by winding the latter on a storage pulley 6.
  • the locking and / or unlocking device 3 constitutes a connection piece between the handling cable 4 and the tool 1.
  • the locking and / or unlocking device 3 comprises a connecting member 7, such as an eyelet, a ring or the like, to the handling cable 4.
  • the locking and / or unlocking device 3 is arranged to be able to reversibly grip a head 8 of the tool 1.
  • the head 8 of the tool 1 is of a particular conformation, common to many tools 1, and in particular common corers used in the field of drilling.
  • the head 8 of the tool 1 has a substantially triangular section, schematically illustrated in Figure 2, having a tip 9 facing upwards in the use position of the tool 1 shown in Figure 1.
  • the head 8 of the 1 comprises an annular restriction 10 which facilitates gripping of the tool 1 by the locking and / or unlocking device 3.
  • the annular restriction 10 is interposed between the tip 9 and a body 1 1 of the tool 1.
  • the tip 9 has an outer face 26 which is conical conformation and which constitutes a friction surface against which holding clamps 17, 17 ', visible in Figures 3 to 6, constituting the locking device and / or unlocking 3 slide in close contact.
  • the locking and / or unlocking device 3 comprises a proximal end 12 which is provided with the connecting member 7 and a distal end 13 which has a cage 14 for receiving the head 8 of the
  • the cage 14 has for this purpose a through hole 16 through which the head 8 of the tool 1 circulates for its locking or for its extraction after unlocking.
  • the cage 14 constitutes a closed containment chamber for the head 8 of the tool 1.
  • the passage opening 16 and the connecting member 7 are arranged at the opposite ends of the locking and / or unlocking device 3 which is generally extended along a general axis of extension A1 which merges with the direction of the force of force. Earth's gravity when the tool is in the position of use in a vertical wellbore.
  • the cage 14 houses the pair of holding clamps 17, 17 'which are diametrically distributed relative to the general axis of extension A1.
  • each holding clip 17, 17 ' is pivotally mounted on a respective connecting rod 19, 19' which is itself pivotally mounted on a common cover 20 to the holding clamps 17, 17 '.
  • Each connecting rod 19, 19 ' is provided with a connecting pivot 21, 21' with the holding clip 17, 17 'to which it is affected.
  • Each holding clip 17, 17 ' is provided with a distal orifice 22, 22' and a proximal orifice 23, 23 'which are respectively distributed on either side of the connecting pivot 21, 21' which is provided by the clamp 17, 17 'to which they are assigned.
  • the connecting pivot 21, 21 'of each holding clip 17, 17' is interposed between the distal orifice 22, 22 'and the proximal orifice 23, 23' assigned to each holding clip 17, 17 ' .
  • the distal orifices 22, 22 'and the proximal orifices 23, 23' are of oblong shape and are radially extended along a radial axis A2 which is orthogonal to the general extension axis A1.
  • the distal fingers 24,24 'and the proximal fingers 25,25' are indifferently constitutive of, or attached to, the cage 14. These arrangements are such that from a first translational movement T1 of the commonchain 20 the along the extension axis A1, the holding clamps 17, 17 'are movable in a second movement in translation T2 along the radial axis A2, from a sliding of the distal orifices 22, 22' and proximal 23,23 'respectively along distal fingers 24,24' and proximal fingers 25,25 '.
  • the holding clamps 17, 17 ' are movable in translation relative to each other from an open position in which the distal fingers 22,22' on the one hand and the proximal fingers 23,23 ' on the other hand are distant a maximum distance, to a closed position in which the distal fingers 22,22 'on the one hand and the proximal fingers 23,23' on the other hand are distant a distance minimal.
  • Such a second translational movement T2 of the holding tongs 17, 17 ' is intended for gripping and / or releasing the head 8 of the tool 1.
  • Such a second movement in translation T2 requires a minimum space for a movement of the holding clamps 17, 17 ', so that the cage 14 constitutes a continuous casing, free of grooves, holding clamps 17,17'.
  • Each distal end 18, 18 'of a retaining clip 17, 17' advantageously comprises a sliding ramp 27, 27 'against which the outer face 26 of the head 8 of the tool 1 at least partially bears at the time of introduction the head of the tool 1 inside the cage 14 ( Figure 5).
  • the sliding ramp 27, 27 ' forms with a general elongation axis A3 of the holding clamp 17, 17' to which the sliding ramp is affected, an angle a which is between 0 ° and 45 °.
  • the angle a is greater than or equal to 0 ° and is less than or equal to 45 °.
  • the angle a is zero such that the sliding ramp 27, 27 'and the general elongation axis A3 are parallel.
  • the angle a is however represented fictitiously between the sliding ramp 27,27 'and the general elongation axis A3 to illuminate the understanding of its location while structurally the angle a is zero.
  • the axis A3 is parallel and coincides with the axis A1.
  • the sliding ramp 27,27 ' is interposed between a bearing stop 28,28' and an outer face 30,30 'which respectively comprises each distal end 18, 18'.
  • the support stop 28,28 ' is intended to bear against a shoulder 29 of the head 8 of the tool 1 ( Figure 6).
  • the shoulder 29 is formed between the tip 9 and the annular restriction 10 of the head 8 of the tool 1.
  • the shoulder 29 horizontal. It therefore extends in the direction of the axis A2.
  • the outer face 30,30 ' is the respective face of each distal end 18, 18' which is turned towards the passage opening 16.
  • the sliding ramp 27,27 ' constitutes an intermediate surface between the support abutment 28,28 'and the outer face 30,30' of each holding clip 17, 17 '.
  • the sliding ramp 27, 27 ' constitutes at least partially a bearing surface of the holding clip 17, 17' against the annular restriction 10 of the head of the tool 1.
  • Such a bearing surface of the present invention is intended to wear without altering the support stop 28,28 '.
  • the sliding ramp 27,27 ' is formed orthogonal to the bearing stop 28,28' that includes each support clamp 17, 17 '.
  • the slip ramp 27, 27 ' has a length L which is between 30% and 100% of a thickness E of the distal tip 18, 18'.
  • the length L is of the order of 70% of the thickness E to 10%.
  • the thickness E is taken between the bearing stop 28,28 'and the outer face 30,30' respectively of the distal ends 18,18 '.
  • the thickness E is to be considered as the maximum distance between the bearing stop 28,28 'and the outer face 30,30' respectively of the distal ends 18, 18 '.
  • each sliding ramp 27, 27 ' is shaped in a portion of a cylinder 100 arranged around a generator G which is merged with the axis of general elongation A3 of the holding clamp 17, 17 'at which the sliding ramp 27, 27' is affected.
  • the general elongation axis A3 of each holding clamp 17, 17 ' is parallel to the general extension axis A1 of the locking and / or unlocking device 3.
  • each holding clip 17, 17 ' comprises a wear indicator 101, such as a relief, a groove, a graduation or the like, which is preferably formed on a lateral face 102, 102' of the distal end 18, 18 .
  • the lateral face 102, 102 ' is for example a face interposed between the stop of 28,28 'connection and the outer face 30,30', the side face 102, 102 'being secant to the slip ramp 27,27'.
  • each holding pliers 17, 17 ' is preferably made of hardened steel 42-45 HRC.

Abstract

The invention relates to a holding clamp (17, 17') consisting of a device (3) for locking and/or unlocking a tool (1) head (8). The holding clamp (17, 17') extends along an overall axis of elongation (A3) of the holding clamp (17, 17'). The holding clamp (17, 17') includes a slide ramp (27, 27') for the tool (1) head (8). The slide ramp (27, 27') forms an angle (a) with the overall axis of elongation (A3), which is between 0° and 45°.

Description

Pince de maintien constitutive d'un dispositif de verrouillage et/ou de déverrouillage d'une tête d'un outil, tel qu'un carottier.  Retaining clip constituting a device for locking and / or unlocking a head of a tool, such as a corer.
L'invention relève du domaine général du carottage du sol ou de la roche, à partir d'un puits de forage. L'invention relève plus particulièrement du domaine des outils de repêchage, de saisie ou de dégagement d'un outil, tel qu'un carottier ou analogue, dans le puits de forage. Elle a pour objet une pince de maintien constitutive d'un dispositif de verrouillage et/ou de déverrouillage d'une tête de l'outil. Elle a aussi pour objet un tel dispositif de verrouillage et/ou de déverrouillage comprenant au moins deux telles pinces de maintien. The invention relates to the general field of coring soil or rock, from a wellbore. The invention relates more particularly to the field of tools for retrieving, gripping or releasing a tool, such as a corer or the like, in the wellbore. It relates to a holding clamp constituting a locking device and / or unlocking a head of the tool. It also relates to such a locking device and / or unlocking comprising at least two such holding clamps.
Dans le domaine du carottage, il est connu d'utiliser un carottier pour prélever un échantillon d'un sol, d'une roche ou analogue. Le carottier est globalement agencé en un tube délimitant un volume intérieur pour la réception de l'échantillon à prélever. Le carottier se compose de deux parties : une partie intérieure et une partie extérieure. La partie extérieure est composée principalement de tubes formant une enveloppe de la partie intérieure, cette dernière étant mobile en descente et en remontée à l'intérieur du puits de forage pour récupérer l'échantillon. La manutention de la partie intérieure du carottier s'effectue par l'intermédiaire d'un dispositif de verrouillage et/ou de déverrouillage qui est interposé entre la tête de carottier et un câble de manutention. In the field of coring, it is known to use a corer to take a sample of a soil, a rock or the like. The corer is generally arranged in a tube defining an interior volume for receiving the sample to be taken. The corer is composed of two parts: an inner part and an outer part. The outer part consists mainly of tubes forming an envelope of the inner part, the latter being movable downhill and upward inside the wellbore to recover the sample. The handling of the inner portion of the corer is effected by means of a locking and / or unlocking device which is interposed between the corer head and a handling cable.
Le document US 2004/0195852 (Beach) décrit un tel dispositif de verrouillage et/ou de déverrouillage de la tête du carottier. Le dispositif est destiné à saisir réversiblement la tête du carottier, pour permettre la descente ou la remontée de ce dernier à l'intérieur du puits de forage. A cet effet, le dispositif est susceptible d'être agencé en position de saisie de la tête de carottier, dans laquelle le dispositif maintient cette dernière. Le dispositif est également susceptible d'être agencé en position de dégagement de la tête de carottier, dans laquelle le dispositif libère et/ou relâche la tête de carottier. Le dispositif comprend un tube allongé, des pinces de maintien et un manchon de verrouillage. Les pinces de maintien sont montées pivotantes sur le tube allongé. Les pinces de maintien comprennent des premières extrémités respectives pour saisir la tête du carottier. A cette fin, les premières extrémités sont conformées en crochet de préhension de la tête de carottier. Plus particulièrement, chaque pince de maintien comporte une extrémité qui est agencée en pointe présentant une section demi-triangulaire. La pointe comprend une face de contact qui est destinée à venir en appui contre la tête de l'outil et une rampe comprise entre un bord de la face de contact et une arête d'extrémité. Document US 2004/0195852 (Beach) describes such a device for locking and / or unlocking the corer head. The device is intended to reversibly grip the head of the corer, to allow the descent or the rise of the latter inside the wellbore. For this purpose, the device is capable of being arranged in the gripping position of the corer head, in which the device maintains the latter. The device can also be arranged in the disengaged position of the corer head, in which the device releases and / or releases the corer head. The device comprises an elongated tube, holding clips and a locking sleeve. The holding clips are pivotally mounted on the elongate tube. The holding clips include respective first ends for gripping the corer head. To this end, the first ends are shaped gripping hook of the corer head. More particularly, each holding clip has an end which is arranged in a point having a half-triangular section. The tip comprises a contact face which is intended to bear against the head of the tool and a ramp between an edge of the contact face and an end edge.
Les pinces de maintien sont des organes qui subissent des sollicitations mécaniques importantes et sont de ce fait sujettes à une usure régulière qui est préjudiciable. De plus, les pinces de maintien subissent régulièrement des chocs avec, et des frottements contre, la tête de l'outil ce qui amplifie leur usure prématurée. Une telle usure nécessite des opérations de maintenance longues et coûteuses, qui impliquent fréquemment le remplacement des pinces de maintien usagées par de nouvelles pinces de maintien, un tel remplacement s'avérant être contraignant. Un but de la présente invention est de proposer une pince de maintien qui est agencée pour répondre aux inconvénients susvisés, et qui est notamment résistante au regard des phénomènes d'usure. Un autre but de la présente invention est de proposer un dispositif de verrouillage et/ou de déverrouillage qui comprend au moins un couple de telles pinces de maintien, qui est robuste et pérenne et enfin qui est également optimisé au regard de la sécurité d'un opérateur, notamment à partir d'une minimisation d'un risque de chute d'un outil porté par l'intermédiaire de telles pinces de maintien. The holding clips are organs that undergo significant mechanical stress and are therefore subject to regular wear which is detrimental. In addition, the holding clips regularly suffer shocks with, and friction against, the head of the tool which amplifies their premature wear. Such wear requires long and costly maintenance operations, which frequently involve the replacement of used holding clips with new holding clips, such a replacement proving to be binding. An object of the present invention is to provide a holding clamp which is arranged to meet the aforementioned drawbacks, and which is particularly resistant to wear phenomena. Another object of the present invention is to provide a locking device and / or unlocking which comprises at least a pair of such holding clamps, which is robust and durable and finally which is also optimized with respect to the safety of a operator, especially from a minimization of a risk of falling of a tool carried by means of such holding clamps.
Une pince de maintien de la présente invention est une pince de maintien constitutive d'un dispositif de verrouillage et/ou de déverrouillage d'une tête d'un outil. La pince de maintien est étendue selon un axe d'allongement général de la pince de maintien. La pince de maintien comprend une rampe de glissement de la tête de l'outil. A holding clamp of the present invention is a holding clamp constituting a locking device and / or unlocking a head of a tool. The holding clip is extended along an axis of general elongation of the holding clip. The holding clip includes a sliding ramp of the tool head.
Selon la présente invention, la rampe de glissement forme avec l'axe d'allongement général un angle qui est compris entre 0° et 45°. According to the present invention, the sliding ramp forms with the axis of general elongation an angle which is between 0 ° and 45 °.
L'angle est compris avantageusement entre 0° et 30°, voire entre 0° et 15°, voire entre 0° et 5°. Selon une variante préférée, l'angle est égale à 0°. The angle is advantageously between 0 ° and 30 °, or even between 0 ° and 15 °, or even between 0 ° and 5 °. According to a preferred variant, the angle is equal to 0 °.
La rampe de glissement est avantageusement conformée en une portion d'une surface de révolution ayant une génératrice qui est parallèle à l'axe d'allongement général de la pince de maintien. The sliding ramp is advantageously shaped in a portion of a surface of revolution having a generatrix which is parallel to the general axis of elongation of the holding clip.
La rampe de glissement comporte préférentiellement une longueur qui est comprise entre 30% et 100% d'une épaisseur d'un bout distal de la pince de maintien. De préférence, la rampe de glissement est ménagée orthogonalemént à une butée de soutien que comporte la pince de maintien. The sliding ramp preferably comprises a length that is between 30% and 100% of a thickness of a distal tip of the holding clip. Preferably, the sliding ramp is formed orthogonalemént to a support abutment that includes the holding clip.
La pince de maintien est avantageusement pourvue d'un orifice distal et d'un orifice proximal, qui sont chacun de forme oblongue et qui sont chacun longitudinalement étendus selon un axe radial qui est orthogonal à l'axe d'allongement général. The holding clip is advantageously provided with a distal orifice and a proximal orifice, each of which is of oblong shape and which are each longitudinally extended along a radial axis which is orthogonal to the general elongation axis.
La pince de maintien est avantageusement pourvue d'un pivot de liaison qui est interposé entre l'orifice distal et l'orifice proximal. Un dispositif de verrouillage et/ou de déverrouillage d'une tête d'un outil de la présente invention est principalement reconnaissable en ce que ledit dispositif comprend au moins un couple de telles pinces de maintien. De préférence, chaque pince de maintien est montée mobile en translation selon l'axe radial qui est orthogonal à l'axe d'allongement général de la pince de maintien. The holding clip is advantageously provided with a connecting pin which is interposed between the distal orifice and the proximal orifice. A device for locking and / or unlocking a head of a tool of the present invention is mainly recognizable in that said device comprises at least one pair of such holding clips. Preferably, each retaining clip is mounted to move in translation along the radial axis which is orthogonal to the general elongation axis of the retaining clip.
Les pinces de maintien sont avantageusement logées à l'intérieur d'une cage ménagée à une extrémité distale que comporte le dispositif de verrouillage et/ou de déverrouillage. The holding clips are advantageously housed inside a cage formed at a distal end that comprises the locking device and / or unlocking.
Ledit dispositif est avantageusement étendu selon un axe d'extension générale qui est parallèle à l'axe d'allongement général de la pince de maintien. Said device is advantageously extended along a general axis of extension which is parallel to the axis of general elongation of the holding clip.
Les pinces de maintien d'un même couple de pinces de maintien sont préférentiellement montées diamétralement opposées l'une à l'autre par rapport à l'axe d'extension générale. D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description qui va en être faite d'exemples de réalisation, en relation avec les figures des planches annexées, dans lesquelles : The clamps holding the same pair of holding clamps are preferably mounted diametrically opposite one another relative to the general axis of extension. Other characteristics and advantages of the present invention will become apparent on reading the description which will be given of exemplary embodiments, in relation to the figures of the appended plates, in which:
La figure 1 est une vue schématique d'un dispositif de verrouillage et/ou de déverrouillage de la présente invention lors de son utilisation.  Figure 1 is a schematic view of a locking and / or unlocking device of the present invention in use.
La figure 2 est une vue schématique en coupe d'une tête d'outil destinée à être verrouillée et/ou déverrouillée par ledit dispositif illustré sur la figure précédente. La figure 3 est une vue schématique en coupe du dispositif de verrouillage et/ou de déverrouillage représenté sur la figure 1. Figure 2 is a schematic sectional view of a tool head to be locked and / or unlocked by said device shown in the previous figure. FIG. 3 is a diagrammatic sectional view of the locking and / or unlocking device shown in FIG.
La figure 4 est une vue schématique partielle et en perspective d'une extrémité distale dudit dispositif illustré sur la figure 3. La figure 5 est une vue schématique partielle et en perspective de l'extrémité distale dudit dispositif illustré sur la figure 4, ledit dispositif étant représenté lors d'une introduction d'une tête d'un outil pour son maintien. FIG. 4 is a partial schematic view in perspective of a distal end of said device illustrated in FIG. Figure 5 is a partial schematic view in perspective of the distal end of said device shown in Figure 4, said device being shown when introducing a head of a tool for its maintenance.
La figure 6 est une vue schématique partielle et en perspective de l'extrémité distale dudit dispositif illustré sur la figure 4, ledit dispositif étant représenté après immobilisation de la tête de l'outil. Figure 6 is a partial schematic perspective view of the distal end of said device shown in Figure 4, said device being shown after immobilization of the head of the tool.
Dans le domaine du carottage, il est courant d'avoir à manœuvrer un outil 1 au fond d'un puits de forage 2. L'outil 1 est préférentiellement un carottier qui est destiné à prélever une carotte de roche, de sol ou analogue au fond du puits de forage 2. Toutefois, l'outil 1 est susceptible d'être d'une nature différente sans déroger aux règles de la présente invention qui vont être énoncées. Pour amener l'outil 1 au fond du puits de forage 2 et/ou pour remonter l'outil 1 depuis le fond du puits de forage 2, l'outil 1 est maintenu par un dispositif de verrouillage et/ou de déverrouillage 3 qui est interposé entre l'outil 1 et un câble de manutention 4. Le câble de manutention 4 est en relation avec un organe moteur 5, treuil ou analogue, qui est apte à manoeuvrer à la descente et/ou à la remontée le câble de manutention 4, notamment par enroulement de ce dernier sur une poulie de stockage 6. Le dispositif de verrouillage et/ou de déverrouillage 3 constitue une pièce de raccordement entre le câble de manutention 4 et l'outil 1. Le dispositif de verrouillage et/ou de déverrouillage 3 comprend un organe de raccordement 7, tel qu'un œillet, un anneau ou analogue, au câble de manutention 4. Le dispositif de verrouillage et/ou de déverrouillage 3 est agencé pour pouvoir saisir de manière réversible une tête 8 de l'outil 1 . La tête 8 de l'outil 1 est d'une conformation particulière, commune à de nombreux outils 1 , et notamment commune aux carottiers utilisés dans le domaine du forage. La tête 8 de l'outil 1 présente une section sensiblement triangulaire, schématiquement illustrée sur la figure 2, comportant une pointe 9 orientée vers le haut en position d'utilisation de l'outil 1 représentée sur la figure 1. La tête 8 de l'outil 1 comprend une restriction annulaire 10 qui facilite une préhension de l'outil 1 par le dispositif de verrouillage et/ou de déverrouillage 3. La restriction annulaire 10 est interposée entre la pointe 9 et un corps 1 1 de l'outil 1 . La pointe 9 comporte une face externe 26 qui est de conformation conique et qui constitue une surface de frottement contre laquelle des pinces de maintien 17, 17', visibles sur les figures 3 à 6, constitutives du dispositif de verrouillage et/ou de déverrouillage 3 viennent coulisser en contact étroit. In the field of coring, it is common to have to maneuver a tool 1 at the bottom of a wellbore 2. The tool 1 is preferably a corer which is intended to take a core of rock, soil or the like. bottom of the wellbore 2. However, the tool 1 is likely to be of a different nature without departing from the rules of the present invention which will be set forth. To bring the tool 1 to the bottom of the wellbore 2 and / or to reassemble the tool 1 from the bottom of the wellbore 2, the tool 1 is held by a locking and / or unlocking device 3 which is interposed between the tool 1 and a handling cable 4. The handling cable 4 is in connection with a drive member 5, winch or the like, which is able to maneuver on descent and / or ascent the handling cable 4 , in particular by winding the latter on a storage pulley 6. The locking and / or unlocking device 3 constitutes a connection piece between the handling cable 4 and the tool 1. The locking and / or unlocking device 3 comprises a connecting member 7, such as an eyelet, a ring or the like, to the handling cable 4. The locking and / or unlocking device 3 is arranged to be able to reversibly grip a head 8 of the tool 1. The head 8 of the tool 1 is of a particular conformation, common to many tools 1, and in particular common corers used in the field of drilling. The head 8 of the tool 1 has a substantially triangular section, schematically illustrated in Figure 2, having a tip 9 facing upwards in the use position of the tool 1 shown in Figure 1. The head 8 of the 1 comprises an annular restriction 10 which facilitates gripping of the tool 1 by the locking and / or unlocking device 3. The annular restriction 10 is interposed between the tip 9 and a body 1 1 of the tool 1. The tip 9 has an outer face 26 which is conical conformation and which constitutes a friction surface against which holding clamps 17, 17 ', visible in Figures 3 to 6, constituting the locking device and / or unlocking 3 slide in close contact.
Sur la figure 3, le dispositif de verrouillage et/ou de déverrouillage 3 comprend une extrémité proximale 12 qui est munie de l'organe de raccordement 7 et une extrémité distale 13 qui comporte une cage 14 pour la réception de la tête 8 de l'outil 1 à l'intérieur d'un volume intérieur 15 de la cage 14. La cage 14 comporte à cet effet un orifice de passage 16 à travers lequel la tête 8 de l'outil 1 circule pour son verrouillage ou pour son extraction après déverrouillage. En position de verrouillage, la cage 14 constitue une enceinte close de confinement de la tête 8 de l'outil 1 . L'orifice de passage 16 et l'organe de raccordement 7 sont disposés aux extrémités opposées du dispositif de verrouillage et/ou de déverrouillage 3 qui est globalement étendu selon un axe d'extension générale A1 qui se confond avec la direction de la force de gravité terrestre lorsque l'outil est en position d'utilisation dans un puits de forage vertical. Pour assurer la préhension de la tête 8 de l'outil 1 , la cage 14 loge le couple de pinces de maintien 17, 17' qui sont diamétralement réparties par rapport à l'axe d'extension générale A1 . Les pinces de maintien 17, 17' sont confinées à l'intérieur de la cage 14 qui constituent une enveloppe de protection de ces dernières. Autrement dit, pour un observateur extérieur au dispositif de verrouillage et/ou de déverrouillage 3, les pinces de maintien 17, 17' sont inaccessibles. Les pinces de maintien 17, 17' comprennent un bout distal respectif 18, 18' qui est conformé en crochet pour la préhension de la tête 8 de l'outil 1. Plus particulièrement, les bouts distaux 18, 18' des pinces de maintien 17, 17' sont prévus pour venir au contact de la restriction annulaire 10 de la tête 8 de l'outil 1 et enserrer cette dernière pour son maintien. In FIG. 3, the locking and / or unlocking device 3 comprises a proximal end 12 which is provided with the connecting member 7 and a distal end 13 which has a cage 14 for receiving the head 8 of the The cage 14 has for this purpose a through hole 16 through which the head 8 of the tool 1 circulates for its locking or for its extraction after unlocking. . In the locking position, the cage 14 constitutes a closed containment chamber for the head 8 of the tool 1. The passage opening 16 and the connecting member 7 are arranged at the opposite ends of the locking and / or unlocking device 3 which is generally extended along a general axis of extension A1 which merges with the direction of the force of force. Earth's gravity when the tool is in the position of use in a vertical wellbore. To ensure gripping of the head 8 of the tool 1, the cage 14 houses the pair of holding clamps 17, 17 'which are diametrically distributed relative to the general axis of extension A1. The holding clamps 17, 17 'are confined inside the cage 14 which constitute a protective envelope of the latter. In other words, for an observer outside the locking device and / or unlocking 3, the holding clamps 17, 17 'are inaccessible. The holding tongs 17, 17 'comprise a respective distal tip 18, 18' which is shaped as a hook for grasping the head 8 of the tool 1. More particularly, the distal ends 18, 18 'of the holding tongs 17 , 17 'are provided to come into contact with the annular restriction 10 of the head 8 of the tool 1 and grip the latter for its maintenance.
Sur la figure 4, chaque pince de maintien 17, 17' est montée pivotante sur une bielle respective 19, 19' qui est elle-même montée pivotante sur une chappe commune 20 aux pinces de maintien 17,17'. Chaque bielle 19,19' est pourvue d'un pivot de liaison 21 ,21 ' avec la pince de maintien 17, 17' à laquelle il est affecté. Autrement dit, chaque bielle 19, 19' pivote autour du point de pivot 21 ,21 ' qui lui est affecté. Autrement dit encore, chaque bielle 19, 19' pivote sur la chappe commune 20 aux deux bielles 19,19'. Chaque pince de maintien 17, 17' est pourvue d'un orifice distal 22,22' et d'un orifice proximal 23,23' qui sont respectivement répartis de part et d'autre du pivot de liaison 21 ,21 ' que comporte la pince de maintien 17, 17' auquel ils sont affectés. Autrement dit, le pivot de liaison 21 ,21 ' de chaque pince de maintien 17, 17' est interposé entre l'orifice distal 22,22' et l'orifice proximal 23,23' affecté à chaque pince de maintien 17, 17'. Les orifices distaux 22,22' et les orifices proximaux 23,23' sont de forme oblongue et sont radialement étendus selon un axe radial A2 qui est orthogonal à l'axe d'extension général A1 . Chaque orifice distal 22,22' loge un doigt distal 24,24' et chaque orifice proximal 23,23' loge un doigt proximal 25,25'. Les doigts distaux 24,24' et les doigts proximaux 25,25' sont indifféremment constitutifs de, ou rapportés sur, la cage 14. Ces dispositions sont telles qu'à partir d'un premier mouvement en translation T1 de la chappe commune 20 le long de l'axe d'extension A1 , les pinces de maintien 17, 17' sont mobiles selon un deuxième mouvement en translation T2 le long de l'axe radial A2, à partir d'un coulissement des orifices distaux 22,22' et proximaux 23,23' respectivement le long des doigts distaux 24,24' et des doigts proximaux 25,25'. Aussi, les pinces de maintien 17, 17' sont mobiles en translation l'une par rapport à l'autre depuis une position d'ouverture dans laquelle les doigts distaux 22,22' d'une part et les doigts proximaux 23,23' d'autre part sont éloignés d'une distance maximale, jusqu'à une position de fermeture dans laquelle les doigts distaux 22,22' d'une part et les doigts proximaux 23,23' d'autre part sont éloignés d'une distance minimale. Un tel deuxième mouvement en translation T2 des pinces de maintien 17,17' est destiné à la prise et/ou au relâchement de la tête 8 de l'outil 1 . Un tel deuxième mouvement en translation T2 nécessite un encombrement minimum pour un débattement des pinces de maintien 17, 17', de telle sorte que la cage 14 constitue une enveloppe continue, exempte de rainures, des pinces de maintien 17,17'. Il en résulte finalement que les pinces de maintien 17, 17', en position de fermeture dans laquelle les pinces de maintien 17, 17' enserrent la tête 8 de l'outil 1 , ou en position d'ouverture dans laquelle les pinces de maintien libèrent la tête 8 de l'outil 1 , sont inaccessibles à un quelconque objet et/ou utilisateur externe à la cage 14. Il en découle finalement un fonctionnement sécurisé et optimisé d'un tel dispositif de verrouillage et/ou de déverrouillage 3. Chaque bout distal 18,18' d'une pince de maintien 17,17' comprend avantageusement une rampe de glissement 27,27' contre laquelle vient s'appuyer au moins partiellement la face externe 26 de la tête 8 de l'outil 1 , lors de l'introduction de la tête de l'outil 1 à l'intérieur de la cage 14 (figure 5). Selon la présente invention, la rampe de glissement 27,27' forme avec un axe d'allongement général A3 de la pince de maintien 17,17' à laquelle la rampe de glissement est affectée, un angle a qui est compris entre 0° et 45°. Autrement dit, l'angle a est supérieur ou égal à 0° et est inférieur ou égal à 45°. Selon la variante illustrée sur la figure 4, l'angle a est nul de telle sorte que la rampe de glissement 27,27' et l'axe d'allongement général A3 sont parallèles. Sur cette figure, l'angle a est toutefois représenté fictivement entre la rampe de glissement 27,27' et l'axe d'allongement général A3 pour éclairer la compréhension de sa localisation alors que structurellement l'angle a est nul. Ainsi que cela apparaît à la figure 3, l'axe A3 est parallèle et se confond avec l'axe A1 . In FIG. 4, each holding clip 17, 17 'is pivotally mounted on a respective connecting rod 19, 19' which is itself pivotally mounted on a common cover 20 to the holding clamps 17, 17 '. Each connecting rod 19, 19 'is provided with a connecting pivot 21, 21' with the holding clip 17, 17 'to which it is affected. In other words, each connecting rod 19, 19 'pivots about the pivot point 21, 21' assigned to it. In other words, each connecting rod 19, 19 'pivots on the common housing 20 to the two connecting rods 19, 19'. Each holding clip 17, 17 'is provided with a distal orifice 22, 22' and a proximal orifice 23, 23 'which are respectively distributed on either side of the connecting pivot 21, 21' which is provided by the clamp 17, 17 'to which they are assigned. In other words, the connecting pivot 21, 21 'of each holding clip 17, 17' is interposed between the distal orifice 22, 22 'and the proximal orifice 23, 23' assigned to each holding clip 17, 17 ' . The distal orifices 22, 22 'and the proximal orifices 23, 23' are of oblong shape and are radially extended along a radial axis A2 which is orthogonal to the general extension axis A1. Each distal orifice 22,22 'houses a distal finger 24,24' and each proximal orifice 23,23 'houses a proximal finger 25,25'. The distal fingers 24,24 'and the proximal fingers 25,25' are indifferently constitutive of, or attached to, the cage 14. These arrangements are such that from a first translational movement T1 of the commonchain 20 the along the extension axis A1, the holding clamps 17, 17 'are movable in a second movement in translation T2 along the radial axis A2, from a sliding of the distal orifices 22, 22' and proximal 23,23 'respectively along distal fingers 24,24' and proximal fingers 25,25 '. Also, the holding clamps 17, 17 'are movable in translation relative to each other from an open position in which the distal fingers 22,22' on the one hand and the proximal fingers 23,23 ' on the other hand are distant a maximum distance, to a closed position in which the distal fingers 22,22 'on the one hand and the proximal fingers 23,23' on the other hand are distant a distance minimal. Such a second translational movement T2 of the holding tongs 17, 17 'is intended for gripping and / or releasing the head 8 of the tool 1. Such a second movement in translation T2 requires a minimum space for a movement of the holding clamps 17, 17 ', so that the cage 14 constitutes a continuous casing, free of grooves, holding clamps 17,17'. As a result, the holding clamps 17, 17 'in the closed position in which the holding clamps 17, 17' enclose the head 8 of the tool 1, or in the open position in which the holding clamps free the head 8 of the tool 1, are inaccessible to any object and / or user external to the cage 14. This finally results in a secure and optimized operation of such a locking device and / or unlocking 3. Each distal end 18, 18 'of a retaining clip 17, 17' advantageously comprises a sliding ramp 27, 27 'against which the outer face 26 of the head 8 of the tool 1 at least partially bears at the time of introduction the head of the tool 1 inside the cage 14 (Figure 5). According to the present invention, the sliding ramp 27, 27 'forms with a general elongation axis A3 of the holding clamp 17, 17' to which the sliding ramp is affected, an angle a which is between 0 ° and 45 °. In other words, the angle a is greater than or equal to 0 ° and is less than or equal to 45 °. According to the variant illustrated in FIG. 4, the angle a is zero such that the sliding ramp 27, 27 'and the general elongation axis A3 are parallel. In this figure, the angle a is however represented fictitiously between the sliding ramp 27,27 'and the general elongation axis A3 to illuminate the understanding of its location while structurally the angle a is zero. As it appears in FIG. 3, the axis A3 is parallel and coincides with the axis A1.
La rampe de glissement 27,27' est interposée entre une butée de soutien 28,28' et une face extérieure 30,30' que comporte respectivement chaque bout distal 18, 18'. La butée de soutien 28,28' est destinée à venir en appui contre un épaulement 29 de la tête 8 de l'outil 1 (figure 6). L'épaulement 29 est ménagé entre la pointe 9 et la restriction annulaire 10 de la tête 8 de l'outil 1 . L'épaulement 29 horizontal. Il s'étend donc dans la direction de l'axe A2. La face extérieure 30,30' est la face respective de chaque bout distal 18, 18' qui est tournée vers l'orifice de passage 16. Autrement dit, la rampe de glissement 27,27' constitue une surface intermédiaire entre la butée de soutien 28,28' et la face extérieure 30,30' de chaque pince de maintien 17, 17'. En position d'immobilisation de la tête 8 de l'outil 1 (figure 6), la rampe de glissement 27,27' constitue au moins partiellement une surface d'appui de la pince de maintien 17, 17' contre la restriction annulaire 10 de la tête de l'outil 1 . Une telle surface d'appui de la présente invention est destinée à s'user sans altérer la butée de soutien 28,28'. The sliding ramp 27,27 'is interposed between a bearing stop 28,28' and an outer face 30,30 'which respectively comprises each distal end 18, 18'. The support stop 28,28 'is intended to bear against a shoulder 29 of the head 8 of the tool 1 (Figure 6). The shoulder 29 is formed between the tip 9 and the annular restriction 10 of the head 8 of the tool 1. The shoulder 29 horizontal. It therefore extends in the direction of the axis A2. The outer face 30,30 'is the respective face of each distal end 18, 18' which is turned towards the passage opening 16. In other words, the sliding ramp 27,27 'constitutes an intermediate surface between the support abutment 28,28 'and the outer face 30,30' of each holding clip 17, 17 '. In the position of immobilization of the head 8 of the tool 1 (FIG. 6), the sliding ramp 27, 27 'constitutes at least partially a bearing surface of the holding clip 17, 17' against the annular restriction 10 of the head of the tool 1. Such a bearing surface of the present invention is intended to wear without altering the support stop 28,28 '.
Selon la variante illustrée sur la figure 4 dans laquelle l'angle a est nul, la rampe de glissement 27,27' est ménagée orthogonalement à la butée de soutien 28,28' que comporte chaque pince de soutien 17, 17'. La rampe de glissement 27,27' comporte une longueur L qui est comprise entre 30% et 100% d'une épaisseur E du bout distal 18, 18'. Préférentiellement, la longueur L est de l'ordre de 70% de l'épaisseur E à 10% près. L'épaisseur E est prise entre la butée de soutien 28,28' et la face extérieure 30,30' respective des bouts distaux 18,18'. L'épaisseur E est à considérer comme la distance maximale entre la butée de soutien 28,28' et la face extérieure 30,30' respective des bouts distaux 18, 18'. According to the variant illustrated in Figure 4 wherein the angle a is zero, the sliding ramp 27,27 'is formed orthogonal to the bearing stop 28,28' that includes each support clamp 17, 17 '. The slip ramp 27, 27 'has a length L which is between 30% and 100% of a thickness E of the distal tip 18, 18'. Preferably, the length L is of the order of 70% of the thickness E to 10%. The thickness E is taken between the bearing stop 28,28 'and the outer face 30,30' respectively of the distal ends 18,18 '. The thickness E is to be considered as the maximum distance between the bearing stop 28,28 'and the outer face 30,30' respectively of the distal ends 18, 18 '.
Selon la variante illustrée sur la figure 4 dans laquelle l'angle a est nul, chaque rampe de glissement 27,27' est conformée en une portion d'un cylindre 100 ménagé autour d'une génératrice G qui est confondue avec l'axe d'allongement général A3 de la pince de maintien 17, 17' à laquelle la rampe de glissement 27,27' est affectée. L'axe d'allongement général A3 de chaque pince de maintien 17, 17' est parallèle à l'axe d'extension générale A1 du dispositif de verrouillage et/ou de déverrouillage 3. Ces dispositions sont telles que la rampe de glissement 27,27' est résistante aux phénomènes d'usure en raison de sa longueur L, qui autorise une élimination de matière par frottement sans pour autant altérer sa faculté de maintien de la tête 8 de l'outil 1 . L'inclinaison de la rampe de glissement 27,27' par rapport à l'axe d'allongement général A3 est préférée la plus faible possible pour offrir une surface de glissement la plus importante possible, afin de réduire au maximum une altération de la butée de soutien 28,28'. En effet, la rampe de glissement 27,27' ainsi ménagée entre la butée de soutien 28,28' et la face extérieure 30,30' forme un obstacle à l'altération de la butée de soutien 28,28'. Toutefois, chaque pince de maintien 17, 17' comprend un témoin d'usure 101 , tel qu'un relief, une gorge, une graduation ou analogue, qui est préférentiellement ménagée sur une face latérale 102, 102' du bout distal 18,18'. La face latérale 102, 102' est par exemple une face interposée entre la butée de liaison 28,28' et la face extérieure 30,30', la face latérale 102, 102' étant sécante à la rampe de glissement 27,27'. According to the variant illustrated in FIG. 4, in which the angle a is zero, each sliding ramp 27, 27 'is shaped in a portion of a cylinder 100 arranged around a generator G which is merged with the axis of general elongation A3 of the holding clamp 17, 17 'at which the sliding ramp 27, 27' is affected. The general elongation axis A3 of each holding clamp 17, 17 'is parallel to the general extension axis A1 of the locking and / or unlocking device 3. These arrangements are such that the sliding ramp 27, 27 'is resistant to wear phenomena because of its length L, which allows a removal of material by friction without impairing its ability to hold the head 8 of the tool 1. The inclination of the sliding ramp 27, 27 'with respect to the axis of general elongation A3 is preferably the lowest possible to offer the largest sliding surface possible, in order to minimize an alteration of the abutment. support 28,28 '. Indeed, the sliding ramp 27,27 'thus formed between the bearing stop 28,28' and the outer face 30,30 'forms an obstacle to the alteration of the bearing stop 28,28'. However, each holding clip 17, 17 'comprises a wear indicator 101, such as a relief, a groove, a graduation or the like, which is preferably formed on a lateral face 102, 102' of the distal end 18, 18 . The lateral face 102, 102 'is for example a face interposed between the stop of 28,28 'connection and the outer face 30,30', the side face 102, 102 'being secant to the slip ramp 27,27'.
Pour améliorer encore sa résistance à l'usure, chaque pince de maintien 17,17' est préférentiellement réalisée en acier trempé 42-45 HRC. To further improve its resistance to wear, each holding pliers 17, 17 'is preferably made of hardened steel 42-45 HRC.

Claims

Revendications. Claims.
Pince de maintien (17,17') constitutive d'un dispositif de verrouillage et/ou de déverrouillage (3) d'une tête (8) d'un outil (1), Retaining clip (17, 17 ') constituting a device for locking and / or unlocking (3) a head (8) of a tool (1),
ledit dispositif de verrouillage et/ou de déverrouillage s'étendant selon un axe du dispositif (A1),  said locking and / or unlocking device extending along an axis of the device (A1),
ladite tête (8) étant munie d'une pointe (9), d'un corps (11), et d'une restriction (10) interposée entre ledit corps (1 ) et ladite pointe (9),  said head (8) being provided with a tip (9), a body (11), and a restriction (10) interposed between said body (1) and said tip (9),
ladite pince de maintien (17,17') s'étendant selon un axe de la pince (A3) correspondant à l'axe du dispositif (A1), et comprenant un bout distal (18, 18') pour la préhension de ladite tête (8), ledit bout distal (18, 18') comprenant une rampe de glissement (27,27') de la tête (8) de l'outil (1) et une butée de soutien (28, 28'),  said holding clip (17, 17 ') extending along an axis of the clip (A3) corresponding to the axis of the device (A1), and comprising a distal tip (18, 18') for gripping said head (8), said distal tip (18, 18 ') comprising a sliding ramp (27.27') of the head (8) of the tool (1) and a support stop (28, 28 '),
caractérisée en ce que  characterized in that
la pince de maintien (17, 17') est montée mobile en translation (T2) selon un axe radial (A2) qui est orthogonal à l'axe (A3) de la pince ; et en ce que  the holding clip (17, 17 ') is mounted movable in translation (T2) along a radial axis (A2) which is orthogonal to the axis (A3) of the clip; and in that
la rampe de glissement (27,27') forme avec l'axe (A3) de la pince un angle (a) qui est compris entre 0° et 15°.  the sliding ramp (27,27 ') forms with the axis (A3) of the clamp an angle (a) which is between 0 ° and 15 °.
Pince de maintien (17,17') selon l'une quelconque des revendications précédentes, caractérisée en ce que l'angle (a) est compris entre 0° et 5°. Holding clip (17, 17 ') according to one of the preceding claims, characterized in that the angle (a) is between 0 ° and 5 °.
Pince de maintien (17,17') selon la revendication 2, caractérisée en ce que l'angle (a) est égale à 0°. Holding pliers (17, 17 ') according to claim 2, characterized in that the angle (a) is equal to 0 °.
Pince de maintien (17,17') selon l'une quelconque des revendications précédentes, caractérisée en ce que la rampe de glissement (27,27') est conformée en une portion d'une surface de révolution (100) ayant une génératrice (G) qui est parallèle à l'axe de la pince (A3). Holding pliers (17, 17 ') according to any one of the preceding claims, characterized in that the sliding ramp (27, 27') is formed in a portion of a surface of revolution (100) having a generator ( G) which is parallel to the axis of the clamp (A3).
5. - Pince de maintien (17,17') selon l'une quelconque des revendications précédentes, caractérisée en ce que la rampe de glissement (27,27') comporte une longueur (L) qui est comprise entre 30% et 100% d'une épaisseur (E) d'un bout distal (18,18') de la pince de maintien (17,17'). 5. - Gripper (17,17 ') according to any one of the preceding claims, characterized in that the slip ramp (27,27') has a length (L) which is between 30% and 100% a thickness (E) of a distal tip (18,18 ') of the holding clip (17,17').
6. - Pince de maintien (17, 17') selon l'une quelconque des revendications précédentes, caractérisée en ce que la rampe de glissement (27,27') est ménagée orthogonalement à une butée de soutien (28,28') que comporte la pince de maintien (17, 17'). 6. - holding clamp (17, 17 ') according to any one of the preceding claims, characterized in that the sliding ramp (27,27') is arranged orthogonally to a bearing stop (28,28 ') that comprises the holding clip (17, 17 ').
7.- Pince de maintien (17, 17') selon l'une quelconque des revendications précédentes, caractérisée en ce que la pince de maintien (17,17') est pourvue d'un orifice distal (22,22') et d'un orifice proximal (23,23'), qui sont chacun de forme oblongue et qui sont chacun longitudinalement étendus selon l'axe radial (A2). 7. Holding clip (17, 17 ') according to any one of the preceding claims, characterized in that the retaining clip (17, 17') is provided with a distal orifice (22, 22 ') and a proximal orifice (23, 23 '), which are each of oblong shape and which are each longitudinally extended along the radial axis (A2).
8. - Pince de maintien (17,17') selon la revendication 7, caractérisée en ce que la pince de maintien (17, 17') est pourvue d'un pivot de liaison (21 ) qui est interposé entre l'orifice distal (22,22') et l'orifice proximal (23,23'). 8. - holding clamp (17,17 ') according to claim 7, characterized in that the holding clamp (17, 17') is provided with a connecting pin (21) which is interposed between the distal orifice (22,22 ') and the proximal orifice (23,23').
9. - Pince de maintien (17, 17') selon l'une quelconque des revendications précédentes, caractérisée en ce que la pince de maintien (17,17') comprend un témoin d'usure (101 ). 10.- Dispositif de verrouillage et/ou de déverrouillage (3) d'une tête (8) d'un outil (1 ), caractérisé en ce que ledit dispositif (3) comprend au moins un couple de pinces de maintien (17, 17') selon l'une quelconque des revendications précédentes. 1 1.- Dispositif (3) selon la revendication 10, caractérisé en ce que les pinces de maintien (17,17') sont logées à l'intérieur d'une cage (14) ménagée à une extrémité distale (13) que comporte le dispositif de verrouillage et/ou de déverrouillage (3). 9. - holding clamp (17, 17 ') according to any one of the preceding claims, characterized in that the retaining clip (17,17') comprises a wear indicator (101). 10. A device for locking and / or unlocking (3) a head (8) of a tool (1), characterized in that said device (3) comprises at least one pair of holding tongs (17, 17 ') according to any one of the preceding claims. 1 1.- Device (3) according to claim 10, characterized in that the holding clamps (17,17 ') are housed inside a cage (14) provided at a distal end (13) that comprises the locking device and / or unlocking (3).
Dispositif (3) selon l'une quelconque des revendications 10 ou 11 , caractérisé en ce que ledit dispositif (3) est étendu selon l'axe du dispositif (A1) qui est parallèle à l'axe de la pince (A3). Device (3) according to any one of claims 10 or 11, characterized in that said device (3) is extended along the axis of the device (A1) which is parallel to the axis of the clamp (A3).
Dispositif (3) selon la revendication 12, caractérisé en ce que les pinces de maintien (17,17') d'un même couple de pinces de maintien (17,17') sont montées diamétralement opposées l'une à l'autre par rapport à l'axe d'extension générale (A1). Device (3) according to claim 12, characterized in that the retaining tongs (17, 17 ') of the same pair of retaining tongs (17, 17') are mounted diametrically opposite each other by relative to the general extension axis (A1).
PCT/FR2013/000057 2012-03-02 2013-03-04 Holding clamp consisting of a device for locking and/or unlocking a tool head, such as a core bit WO2013128090A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA2869106A CA2869106A1 (en) 2012-03-02 2013-03-04 Constitutive fastening clamp for a locking and/or unlocking device such as the head of a tool, such as a corer
AU2013224833A AU2013224833B2 (en) 2012-03-02 2013-03-04 Holding clamp consisting of a device for locking and/or unlocking a tool head, such as a core bit
EP13715267.4A EP2820234A2 (en) 2012-03-02 2013-03-04 Holding clamp consisting of a device for locking and/or unlocking a tool head, such as a core bit
ZA2014/07151A ZA201407151B (en) 2012-03-02 2014-10-02 Holding clamp consisting of a device for locking and/or unlocking a tool head, such as a core bit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR12/00638 2012-03-02
FR1200638A FR2987645B1 (en) 2012-03-02 2012-03-02 HOLDING CLAMP COMPRISING A DEVICE FOR LOCKING AND / OR UNLOCKING A HEAD OF A TOOL, SUCH AS A CARROT

Publications (2)

Publication Number Publication Date
WO2013128090A2 true WO2013128090A2 (en) 2013-09-06
WO2013128090A3 WO2013128090A3 (en) 2014-12-18

Family

ID=48083451

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2013/000057 WO2013128090A2 (en) 2012-03-02 2013-03-04 Holding clamp consisting of a device for locking and/or unlocking a tool head, such as a core bit

Country Status (6)

Country Link
EP (1) EP2820234A2 (en)
AU (1) AU2013224833B2 (en)
CA (1) CA2869106A1 (en)
FR (1) FR2987645B1 (en)
WO (1) WO2013128090A2 (en)
ZA (1) ZA201407151B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116291268B (en) * 2023-01-19 2023-10-20 江苏江沅机械有限公司 Quick-assembling wellhead device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040195852A1 (en) 2001-05-11 2004-10-07 Andrew Beach Lockable overshot

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1405976A (en) * 1921-02-15 1922-02-07 Dhooge Oscar Fishing tool for oil wells
US1719144A (en) * 1928-04-30 1929-07-02 Reed Roller Bit Co Overshot
US1771066A (en) * 1929-06-11 1930-07-22 Reed Roller Bit Co Overshot
US1810753A (en) * 1930-07-23 1931-06-16 Brown Cornelius Device for removing parts from wells
AU447008B2 (en) * 1971-04-22 1974-03-21 Mind Rill Limited Grappling device for wireline core drills
US4518187A (en) * 1983-06-06 1985-05-21 Leland F. Blatt Parallel movement gripper head
DE8700041U1 (en) * 1987-01-02 1987-03-26 Rheinische Braunkohlenwerke Ag, 5000 Koeln, De
US6095583A (en) * 1996-07-03 2000-08-01 Weatherford/Lamb, Inc. Wellbore fishing tools
US6167833B1 (en) * 1998-10-30 2001-01-02 Camco International Inc. Wear indicator for rotary drilling tools
JP3263373B2 (en) * 1998-12-18 2002-03-04 エービービー株式会社 Automatic coating equipment
US6564885B2 (en) * 2001-04-27 2003-05-20 Boart Longyear International Holdings, Inc. Up-hole overshot and safety drilling apparatus
US7427091B2 (en) * 2005-09-01 2008-09-23 National-Oilwell, Dht, L.P. Spear head overshot for use in a cable guided fishing assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040195852A1 (en) 2001-05-11 2004-10-07 Andrew Beach Lockable overshot

Also Published As

Publication number Publication date
FR2987645A1 (en) 2013-09-06
WO2013128090A3 (en) 2014-12-18
EP2820234A2 (en) 2015-01-07
AU2013224833A1 (en) 2014-10-23
FR2987645B1 (en) 2014-12-26
AU2013224833B2 (en) 2017-09-14
CA2869106A1 (en) 2013-09-06
ZA201407151B (en) 2016-01-27

Similar Documents

Publication Publication Date Title
CA2673317C (en) Locking device for a drilling device
EP0712667B1 (en) Centrifuge with dismountable rotor and a device for the axial locking of the rotor on the drive shaft
EP2222243B1 (en) Device for centring and guiding a drill bit of a dental handpiece
CA2825523A1 (en) Drilling device for making a bone canal with a curved profile inside the body of a vertebra
FR2579969A1 (en)
FR2944842A1 (en) CONNECTING LINK WITH LOCKABLE ROTATING RING
EP2878855A1 (en) Improved openable swivelling fastening device
EP2741298A1 (en) System for gripping and for locking/unlocking, application to the handling of sample holders of nuclear materials
EP1349451B1 (en) Crossbow-type underwater gun comprising a stretching device
WO2013128090A2 (en) Holding clamp consisting of a device for locking and/or unlocking a tool head, such as a core bit
FR2963269A1 (en) Device for extraction and insertion of spring type pin that is used for assembly of two parts in automobile field, has gripping unit assembled on rod to draw manually on rod to realize extraction of pin
EP3010668B1 (en) Reversible wire twisting pliers
EP2115750B1 (en) Tool for the pressure crimping and driving-out of a cleat
EP3315457A1 (en) Double-lever corkscrew
FR2892752A1 (en) Cover/lid locking device for pavement manhole, has lock insert carrier removably fixed in housing to prevent access to head of operating axle, and key introduced in housing to cooperate with head for displacing stems to disengaging position
FR2987646A1 (en) Locking and/or unlocking device for head of coring bit in drilling well, has spring interposed between anchoring point that includes pin slidably mounted inside compression part and another anchor point that includes proximal end of device
EP0558641A1 (en) Mechanism for a corkscrew and an implement for cracking the protective shells of foodstuffs.
EP0023858B1 (en) Cork screw with pulley reduction
WO2023180206A1 (en) Instrument for cutting filiform elements
WO2008116985A2 (en) Gripping transport and placement tool for dental devices
FR2780390A1 (en) Automatic corkscrew
FR2676804A1 (en) STRUCTURE FOR THE EXTENSION AND CONTRACTION OF A PROTECTIVE BATON.
FR2702503A1 (en) Tool for opening manhole covers
BE854225A (en) CABLE TYPE BORING TANK
FR2540171A1 (en) Padlock having elements separable by axial sliding

Legal Events

Date Code Title Description
NENP Non-entry into the national phase in:

Ref country code: DE

ENP Entry into the national phase in:

Ref document number: 2869106

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2013715267

Country of ref document: EP

ENP Entry into the national phase in:

Ref document number: 2013224833

Country of ref document: AU

Date of ref document: 20130304

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13715267

Country of ref document: EP

Kind code of ref document: A2