EP0052672A1 - Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose - Google Patents

Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose Download PDF

Info

Publication number
EP0052672A1
EP0052672A1 EP80201101A EP80201101A EP0052672A1 EP 0052672 A1 EP0052672 A1 EP 0052672A1 EP 80201101 A EP80201101 A EP 80201101A EP 80201101 A EP80201101 A EP 80201101A EP 0052672 A1 EP0052672 A1 EP 0052672A1
Authority
EP
European Patent Office
Prior art keywords
drilling
tube
head
cylindrical body
recovery
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP80201101A
Other languages
German (de)
French (fr)
Other versions
EP0052672B1 (en
Inventor
Honoré Joseph Lambot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Diamant Boart NV SA
Original Assignee
Diamant Boart NV SA
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 Diamant Boart NV SA filed Critical Diamant Boart NV SA
Priority to DE8080201101T priority Critical patent/DE3070343D1/en
Priority to AT80201101T priority patent/ATE12288T1/en
Priority to EP80201101A priority patent/EP0052672B1/en
Priority to US06/322,130 priority patent/US4418770A/en
Priority to ZA818048A priority patent/ZA818048B/en
Publication of EP0052672A1 publication Critical patent/EP0052672A1/en
Application granted granted Critical
Publication of EP0052672B1 publication Critical patent/EP0052672B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe

Definitions

  • the present invention relates to a new system for recovering the inner tube of borehole corers during rising drilling, as well as a new device for recovering the inner tube of corers which can be used for this purpose.
  • the new system according to the invention allows more particularly the recovery of the inner tube from so-called cable type corers, which can be slidable and locked in a train of outer tubes, during upward drilling, without the use of recovery overshot or cable.
  • the new device according to the invention is in turn specifically adapted to this new system for recovering the inner tube of core barrels in rising boreholes, while also being applicable for the recovery of the inner tube of core barrels of the cable type in approximately horizontal boreholes and in downholes.
  • Cable type boreholes are currently widely used in drilling of all kinds, whether downhole drilling for mining, petroleum or geothermal exploration, or horizontal or rising drilling in drilling work in underground mining.
  • This type of cable type corer involves a double tube probing head, the inner tube of which is lockable in the outer tube and can be unlocked and brought to the surface through the drill string outside using a cable, a spare called “overshot” and an auxiliary winch, while the outer rods, and the drill bit remain in the drilled hole.
  • the second drawback of known techniques is the presence of a cable in the majority of the devices used to date for recovering the inner tubes of corers of the type considered in rising drilling.
  • the object of the invention is to produce a new technique for recovering the inner tubes of core barrels in rising holes, which avoids the drawbacks of the previously known techniques.
  • the new system for recovering the inner core barrel provides to equip the inner tube train of the core barrel with a recovery head which can form a sealing piston in the outer tube, and use the force exerted on this recovery head by the release of the drilling liquid column at the bottom of the drill string for unlocking the blocking device of the inner tube barrel trainer with respect to the outer tube, and for recovering the inner tube train, thus avoiding the use of a cable and / or an overshot.
  • a particular embodiment of the new system according to the invention is characterized in that during drilling the recovery head leaves a passage for the circulation of the liquid drilling towards the drilling head, while when cutting the hydraulic pressure of the drilling fluid, the recovery head forms a piston in relation to the outer tube.
  • the recovery head may in particular comprise one or more peripheral seals so that, during drilling, as a result of the hydraulic pressure of the drilling liquid, the peripheral seal (s) is (are) held opposite one or more peripheral recesses in the bore of the external tube allowing the circulation of the drilling liquid towards the drilling head, while during the cutting of this hydraulic pressure the peripheral seal (s) enter into sealing relation with the bore of the outer tube, the release of the liquid column can thus generate on the recovery head, a force capable of unlocking the blocking device of the inner tube train.
  • the recovery head used in the present new system can very adequately be connected to the device for unlocking the inner tube by means of a sliding connection between an upper drilling position leaving a passage for the circulation of the drilling liquid towards the drilling head, and a lower position for recovering the inner tube forming a sealing piston with respect to the outer tube.
  • a particularly advantageous property of the new system according to the invention also lies in the possibility of using the recovery head itself for sending by hydraulic pressure the train of inner tubes to the drilling head.
  • the invention also aims to provide a new recovery head specifically adapted to the new system according to the invention.
  • This new recovery head of a drill core of the inner tube type which can be slidable and locked in a train of outer tubes, which can be unlocked under the effect of a pull, optionally includes: means for connection to the device for unlocking the inner tube train of the core barrel, and means of hydraulic sealing with respect to the external tube, while the connection means and the hydraulic sealing means collaborate with each other and / or with means of the external tube so as to allow, during an upward drilling, the circulation of the drilling fluid towards the drilling head and ensuring the hydraulic sealing of the recovery head with respect to the external tube, when the hydraulic pressure on the drilling fluid is cut off.
  • Such a recovery head has the considerable advantage of being able to be used interchangeably with said removable closure joint for recovering the inner tube of the core barrel without overshot or cable, in upward drilling; and without said removable sealing joint for recovering the inner tube of the core barrel in a conventional manner with overshot and cable, in approximately horizontal drilling or in downhole drilling.
  • the peripheral seal (s) with which the cylindrical body is provided may in particular consist of a removable ring surrounding the cylindrical body, the base tube being tapped so as to be screwed onto the cylindrical body while holding the ring in place against a peripheral stop of the cylindrical body, while the axial rod carrying the second sealing joint is provided with a stop cooperating with the 'base so as to be able to tighten the first removable sealing joint against the communication bore when the base tube is screwed onto the cylindrical body.
  • this auxiliary part may in particular consist of a removable tight seal in the closed position of the bore when the base tube is screwed onto the cylindrical body.
  • Figures 1 to 3 illustrate a first embodiment of the new system for recovering the inner tube of corers according to the invention.
  • the riser coring device used essentially consists of an inner tube train 2, slidable inside an outer tube train 1, and provided with a recovery head 3 according to a first mode of realization of the invention.
  • the entire core barrel 2 and the recovery head 3 are locked (FIGS. 1 and 2) in the outer tube train 1, by means of a locking device 4, hooking in a circumferential groove 3 1 of the tube outside by the lugs 32 of a lock 33, urged outwards by a spring 34.
  • This blocking device 4 is caused by a device 7, constituted by a tubular latch holder 35, integral with the inner tube, and an unlocking slide 36 which carries an unlocking pin 37 and which is slidable in the tubular lock holder 35.
  • the pin 37 thus releases the lugs 32 of the lock 33 from the locking groove 31.
  • the recovery head 3 is connected to this slide 36 by means of a sliding connection 8, formed by a pin 40 fixed to the slide 36 and inserted into an elongated recess 41 in the end of the head recovery 3.
  • This recovery head 3, in the version shown in Figures 1 to 3, consists of a cylindrical body 10, composed of two cylindrical elements 42 and 43, screwed to each other by wedging a ring 25 provided with peripheral seals 6 capable of forming a seal relative to the bore of the outer tube 1; the recovery head 3 can also be provided with a frustoconical hook 23, allowing for example the attachment of a recovery piece with cable, if necessary.
  • the recovery head 3 is held in this upper position as a result of the hydraulic pressure exerted by the drilling liquid sent under pressure to the drilling head.
  • peripheral seals 6 are thus held opposite a peripheral recess 5 in the bore of the outer tube 1, leaving a passage for the circulation of the drilling liquid.
  • the unlocking pin 37 thus acts on the latch 33 so as to release the tabs 32 from the groove 31, and to release the inner rod train 2; this inner rod train 2 will thus start a descent into the outer tube train 1 (cf. FIG. 3), due to its own weight and to the vacuum exerted by the column of drilling liquid.
  • FIGS. 4 and 5 illustrate a second embodiment of the new corer recovery system according to the invention, in rising drilling. The operation of the system is entirely similar to that described above with reference to FIGS. 1 to 3.
  • the recovery device used therein is different in that it is a mixed-use device that can be used both for the recovery of the core barrel without overshot or cable in rising drilling as for the recovery of the Corer in a conventional manner in horizontal or downhole drilling.
  • This device consists of a cylindrical body 10 and a tube 16 with base 17, screwed onto the cylindrical body by a thread 26, wedging a ring 25 provided with peripheral seals 6.
  • the cylindrical body 10 is connected to the unlocking slide 36 by a sliding connector 8 and is traversed by a communication bore 11 between its two ends 12, 13.
  • this communication bore 11 between the two ends 12, 13 of the cylindrical body located on either side of the peripheral seals 6, is closed at by means of a removable seal 14.
  • This removable seal 14 is held in place in the cavity 19 of the tube 16 at base 17 by an axial rod 20 which extends through this tube 16 with base 17, which presses with its end 22 against this removable seal 14 and which bears on the other side against the base 17 by a stop 28 of this axial rod.
  • the device therefore identically has the same function as the device described above with reference to FIGS. 1 to 3, that is to say that during drilling the drilling liquid can circulate by a peripheral recess in the bore of the outer tube 1 (FIG. 4), and when the hydraulic pressure on the drilling fluid is cut off, the device descends into the sealing position of the peripheral seals 6 with the bore of the outer tube (FIG. 5).
  • the new device according to the invention is used without the removable sealing joint 14 for the communication bore 11 in the cylindrical body 10.
  • the tube train inside 2 (the core barrel) is locked in the outside tube train by the locking device 4.
  • the recovery head 3 is however in the lower position of the sliding connector 8 relative to the unlocking device 7, due to the hydraulic pressure of the drilling liquid (and by its own weight recovery head).
  • the drilling liquid can therefore circulate towards the drilling head through the peripheral recess 5 in the bore of the outer tube.
  • an overshot 29 is lowered into the outer tube train 1, using a cable 30.
  • the gripping clamp 50 of the overshot grips on the frustoconical hook 23 of the recovery head.
  • the clamp 50 When a traction is then exerted on the cable 30, the clamp 50 will extend the axial rod 20 against the spring 24. The rod 20 will then come to press against the base 17 of the base tube 16, by its stop 28, and will therefore cause the recovery head 3 upwards, in the sealing position of the peripheral seals 6 relative to the bore of the outer tube 1.
  • the column of drilling liquid situated above the recovery head 3 and its peripheral seals d 'seal 6 can flow through openings 18 in the tube 16 with base 17 and the bore 11 in the cylindrical body 10, during the ascent of the inner rod train.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

Système de récupération d'un carottier de forage du type coulissable et verrouillable dans un train de tubes extérieurs (1), dans des forages montants, dans lequel le train de tube intérieur (carottier) (2) est muni d'une tête de récupération (3) pouvant former piston d'étanchéité dans le tube extérieur (1), et dans lequel la force exercée sur cette tête de récupération (3) par la libération de la colonne de liquide de forage au bas du train de forage est utilisée pour le déverrouillage du dispositif de blocage (4) du train de tube intérieur (carottier) (2) par rapport au tube extérieur (1), et pour la récupération du carottier. Egalement concernée, une tête de récupération utilisable dans ce nouveau système, laquelle comprend des moyens de raccordement coulissant (8) au dispositif de déverrouillage du carottier, et des moyens d'étanchéité hydraulique par rapport au tube extérieur pouvant coopérer avec un évidement périphérique (5) dans l'alésage du tube extérieur (1) pour permettre la circulation du liquide de forage. Dans une autre réalisation utilisable dans des forages descendants ou horizontaux et pour pouvoir, dans ce cas récuperer le carottier (2) par câble et overshot, la tête de récupération (3) est munie de canaux (18) qui sont obturés en position de forage, mais ouverts lorsque la tête (3) est mise sous tension par le câble, de telle manière, qu'un chemin est ouvert pour le liquide de circulation présent dans la tige de forage (1).System for recovering a sliding and lockable type core drill in a train of outer tubes (1), in rising holes, in which the inner tube train (core barrel) (2) is provided with a recovery head (3) capable of forming a sealing piston in the outer tube (1), and in which the force exerted on this recovery head (3) by the release of the column of drilling liquid at the bottom of the drill string is used to unlocking the locking device (4) of the inner tube train (core barrel) (2) relative to the outer tube (1), and for recovering the core barrel. Also concerned, a recovery head usable in this new system, which comprises sliding connection means (8) to the device for unlocking the core barrel, and hydraulic sealing means with respect to the outer tube which can cooperate with a peripheral recess (5 ) in the bore of the outer tube (1) to allow circulation of the drilling fluid. In another embodiment usable in downward or horizontal drilling and to be able, in this case to recover the core barrel (2) by cable and overshot, the recovery head (3) is provided with channels (18) which are closed in the drilling position , but open when the head (3) is tensioned by the cable, in such a way that a path is open for the circulation liquid present in the drill pipe (1).

Description

La présente invention concerne un nouveau système pour la récupération du tube intérieur des carottiers de sondage lors de forages montants, ainsi qu'un nouveau dispositif de récupération du tube intérieur de carottiers utilisables à cet effet.The present invention relates to a new system for recovering the inner tube of borehole corers during rising drilling, as well as a new device for recovering the inner tube of corers which can be used for this purpose.

Le nouveau système selon l'invention permet plus particulièrement la récupération du tube intérieur de carottiers dits du type à câble, coulissables et verrouillables dans un train de tubes extérieurs, lors de forages montants, sans utilisation d'overshot de récupération ni de câble.The new system according to the invention allows more particularly the recovery of the inner tube from so-called cable type corers, which can be slidable and locked in a train of outer tubes, during upward drilling, without the use of recovery overshot or cable.

Le nouveau dispositif selon l'invention est quant à lui spécifiquement adapté à ce nouveau système de récupération du tube intérieur de carottiers en forages montants, tout en étant également applicable pour la récupération du tube intérieur de carottiers du type à câble en forages approximativement horizontaux et en forages descendants.The new device according to the invention is in turn specifically adapted to this new system for recovering the inner tube of core barrels in rising boreholes, while also being applicable for the recovery of the inner tube of core barrels of the cable type in approximately horizontal boreholes and in downholes.

Les carottiers de sondage du type à câble sont actuellement très largement utilisés dans les forages de tous genres, qu'il s'agisse de forages descendants pour la prospection minière, pétrolière ou géothermique, ou de forages horizontaux ou montants dans les travaux de sondage en exploitation souterraine.Cable type boreholes are currently widely used in drilling of all kinds, whether downhole drilling for mining, petroleum or geothermal exploration, or horizontal or rising drilling in drilling work in underground mining.

Ce genre de carottiers du type à câble, amplement décrit dans la littérature technique, implique une tête de sondage à double tube, dont le tube intérieur est verrouillable dans le tube extérieur et peut être déverrouillé et ramené à la surface au travers du train de tiges extérieur à l'aide d'un câble, d'une pièce de repé- chage appelée "overshot" et d'un treuil auxiliaire, tandis que les tiges extérieures, et la couronne de forage restent dans le trou foré.This type of cable type corer, amply described in the technical literature, involves a double tube probing head, the inner tube of which is lockable in the outer tube and can be unlocked and brought to the surface through the drill string outside using a cable, a spare called "overshot" and an auxiliary winch, while the outer rods, and the drill bit remain in the drilled hole.

L'utilisation de tels carottiers présente toutefois un inconvénient important lors de forages montants.The use of such corers, however, has a significant drawback during upright drilling.

Selon les techniques connues à ce jour, il était en effet toujours nécessaire de vider au moins deux fois la colonne de liquide de forage contenue dans le train de tubes, à savoir une première fois avant d'envoyer la pièce de repêchage par poussée hydraulique, et une deuxième fois lors de la récupération du tube intérieur.According to the techniques known to date, it was indeed always necessary to empty at least twice the column of drilling liquid contained in the train of tubes, namely a first time before sending the recovery piece by hydraulic thrust, and a second time when recovering the inner tube.

La présence d'un câble dans la majorité des dispositifs utilisés à ce jour pour la récupération des tubes intérieurs des carottiers du type considéré en forage montant constitue un second inconvénient des techniques connues.The second drawback of known techniques is the presence of a cable in the majority of the devices used to date for recovering the inner tubes of corers of the type considered in rising drilling.

L'invention a pour objet de réaliser une nouvelle technique de récupération des tubes intérieurs de carottiers en forages montants, qui évite les inconvénients des techniques antérieurement connues.The object of the invention is to produce a new technique for recovering the inner tubes of core barrels in rising holes, which avoids the drawbacks of the previously known techniques.

Pour ce faire, le nouveau système de récupération du tube intérieur de carottier, selon l'invention, prévoit de munir le train de tube intérieur du carottier d'une tête de récupération pouvant former piston d'étanchéité dans le tube extérieur, et d'utiliser la force exercée sur cette tête de récupération par la libération de la colonne de liquide de forage au bas du train de forage pour le déverrouillage du dispositif de blocage du train de tube intérieur du carottier par rapport au tube extérieur, et pour la récupération du train de tube intérieur, en évitant ainsi l'utilisation d'un câble et/ou d'un overshot.To do this, the new system for recovering the inner core barrel, according to the invention, provides to equip the inner tube train of the core barrel with a recovery head which can form a sealing piston in the outer tube, and use the force exerted on this recovery head by the release of the drilling liquid column at the bottom of the drill string for unlocking the blocking device of the inner tube barrel trainer with respect to the outer tube, and for recovering the inner tube train, thus avoiding the use of a cable and / or an overshot.

Un mode de réalisation particulier du nouveau système selon l'invention se caractérise par le fait que lors du forage la tête de récupération laisse subsister un passage pour la circulation du liquide de forage vers la tête de forage, tandis que lors de la coupure de la pression hydraulique du liquide de forage, la tête de récupération forme piston d'étanchéité par rapport au tube extérieur.A particular embodiment of the new system according to the invention is characterized in that during drilling the recovery head leaves a passage for the circulation of the liquid drilling towards the drilling head, while when cutting the hydraulic pressure of the drilling fluid, the recovery head forms a piston in relation to the outer tube.

En particulier, la tête de récupération peut notamment comprendre un ou plusieurs joints périphériques de manière telle que, lors du forage, par suite de la pression hydraulique du liquide de forage, le ou les joints périphériques est (sont) maintenu(s) en face d'une ou de plusieurs évidements périphériques dans l'alésage du tube extérieur permettant la circulation du liquide de forage vers la tête de forage, tandis que lors de la coupure de cette pression hydraulique le ou les joints périphériques entrent en relation d'étanchéité avec l'alésage du tube extérieur, la libération de la colonne de liquide pouvant ainsi engendrer sur la tête de récupération, une force capable de déverrouiller le dispositif de blocage du train de tube intérieur.In particular, the recovery head may in particular comprise one or more peripheral seals so that, during drilling, as a result of the hydraulic pressure of the drilling liquid, the peripheral seal (s) is (are) held opposite one or more peripheral recesses in the bore of the external tube allowing the circulation of the drilling liquid towards the drilling head, while during the cutting of this hydraulic pressure the peripheral seal (s) enter into sealing relation with the bore of the outer tube, the release of the liquid column can thus generate on the recovery head, a force capable of unlocking the blocking device of the inner tube train.

Selon une caractéristique complémentaire de l'invention, la tête de récupération utilisée dans le présent nouveau système, peut de manière très adéquate être reliée au dispositif de déverrouillage du tube intérieur au moyen d'un raccord coulissable entre une position supérieure de forage laissant un passage pour la circulation du liquide de forage vers la tête de forage, et une position inférieure de récupération du tube intérieur formant piston d'étanchéité par rapport au tube extérieur.According to a complementary characteristic of the invention, the recovery head used in the present new system, can very adequately be connected to the device for unlocking the inner tube by means of a sliding connection between an upper drilling position leaving a passage for the circulation of the drilling liquid towards the drilling head, and a lower position for recovering the inner tube forming a sealing piston with respect to the outer tube.

Une propriété particulièrement intéressante du nouveau système selon l'invention réside par ailleurs dans la possibilité d'utiliser la tête de récupération elle-même pour l'envoi par pression hydraulique du train de tube intérieur vers la tête de forage.A particularly advantageous property of the new system according to the invention also lies in the possibility of using the recovery head itself for sending by hydraulic pressure the train of inner tubes to the drilling head.

L'invention a d'autre part également pour objet de procurer une nouvelle tête de récupération spécifiquement adaptée au nouveau système selon l'invention. Cette nouvelle tête de récupération d'un carottier de forage du type à tube intérieur coulissable et verrouillable dans un train de tubes extérieurs, déverrouillable sous l'effet d'une traction, comprend éventuellement : des moyens de raccordement au dispositif de déverrouillage du train de tube intérieur du carottier, et des moyens d'étanchéité hydraulique par rapport au tube extérieur, tandis que les moyens de raccordement et les moyens d'étanchéité hydraulique collaborent entre eux et/ou avec des moyens du tube extérieur de manière à permettre, lors d'un forage montant, la circulation du liquide de forage vers la tête de forage et à assurer l'étanchéité hydraulique de la tête de récupération par rapport au tube extérieur, lors de la coupure de la pression hydraulique sur le liquide de forage.The invention also aims to provide a new recovery head specifically adapted to the new system according to the invention. This new recovery head of a drill core of the inner tube type which can be slidable and locked in a train of outer tubes, which can be unlocked under the effect of a pull, optionally includes: means for connection to the device for unlocking the inner tube train of the core barrel, and means of hydraulic sealing with respect to the external tube, while the connection means and the hydraulic sealing means collaborate with each other and / or with means of the external tube so as to allow, during an upward drilling, the circulation of the drilling fluid towards the drilling head and ensuring the hydraulic sealing of the recovery head with respect to the external tube, when the hydraulic pressure on the drilling fluid is cut off.

Selon un mode de réalisation préféré de l'invention, la tête de récupération comprend plus particulièrement :

  • - un corps cylindrique coulissable dans le tube extérieur;
  • - un moyen de raccord de ce corps cylindrique au dispositif de déverrouillage, permettant le coulissement du corps cylindrique entre deux positions extrêmes par rapport au dispositif de déverrouillage ; et
  • - un ou plusieurs joints périphériques sur ledit corps cylindrique permettant à la tête de former piston d'étanchéité dans l'alésage du tube extérieur; de manière telle que lors d'un forage montant la pression hydraulique du liquide de forage maintient la tête de récupération dans sa position supérieure de telle façon que la coopération du ou des joints d'étanchéité de la tête de récupération avec un ou plusieurs évidements périphériques du tube extérieur, permet la circulation du liquide de forage vers la tête de forage, tandis que lors de la coupure de la pression hydraulique sur le liquide de forage la tête de récupération se met dans sa position inférieure de telle façon que ladite tête forme piston d'étanchéité dans le tube extérieur.
According to a preferred embodiment of the invention, the recovery head more particularly comprises:
  • - a cylindrical body slidable in the outer tube;
  • - A means of connecting this cylindrical body to the unlocking device, allowing the sliding of the cylindrical body between two extreme positions relative to the unlocking device; and
  • - one or more peripheral seals on said cylindrical body allowing the head to form a sealing piston in the bore of the outer tube; in such a way that when drilling up the hydraulic pressure of the drilling fluid keeps the recovery head in its upper position so that the cooperation of the seal (s) of the recovery head with one or more peripheral recesses of the outer tube, allows the circulation of the drilling liquid towards the drilling head, while during the cutting of the hydraulic pressure on the drilling liquid the recovery head moves to its lower position so that said head forms a piston in the outer tube.

Dans sa réalisation tout à fait préférée, la nouvelle tête de récupération selon l'invention comprend :

  • - un corps cylindrique muni d'un ou plusieurs joints périphériques, d'un moyen de raccord coulissant au dispositif de verrouillage et traversé d'un alésage de communication entre les extrémités du corps cylindrique situées de part et d'autre du ou des joints périphériques;
  • - un premier joint amovible, capable d'obturer la partie de l'alésage de communication située du côté opposé au moyen de raccord coulissant ;
  • - un tube à embase pourvu d'une ou plusieurs ouvertures de communication entre sa cavité interne et l'extérieur, adapté à être fixé sur le corps cylindrique du côté opposé au moyen de raccord coulissant en maintenant en position le joint amovible, le tube à embase s'étendant axialement autour d'une tige axiale traversant l'embase et munie à son extrémité située à l'intérieur du tube à embase d'un second joint capable d'obturer l'alésage et à son extrémité située à l'extérieur du tube à embase d'un crochet tronconique, un ressort hélicoïdal étant logé autour de la tige axiale et prenant appui contre l'embase et contre le second joint d'obturation.
In its entirely preferred embodiment, the new recovery head according to the invention comprises:
  • - a cylindrical body provided with one or more peripheral seals, a sliding connection means to the locking device and traversed by a communication bore between the ends of the cylindrical body situated on either side of the peripheral seal (s) ;
  • - a first removable seal, capable of closing off the part of the communication bore located on the opposite side by means of sliding connection;
  • - a base tube provided with one or more communication openings between its internal cavity and the outside, adapted to be fixed on the cylindrical body on the opposite side by means of a sliding connection while maintaining the removable seal in position, the tube to base extending axially around an axial rod passing through the base and provided at its end located inside the base tube with a second seal capable of sealing the bore and at its end located outside of the tube with a frustoconical hook base, a helical spring being housed around the axial rod and bearing against the base and against the second sealing joint.

Une telle tête de récupération présente l'avantage considérable de pouvoir être utilisée indifféremment avec ledit joint d'obturation amovible pour la récupération du tube intérieur du carottier sans overshot ni câble, en forage montant; et sans ledit joint d'obturation amovible pour la récupération du tube intérieur du carottier de manière conventionnelle avec overshot et câble, en forage approximativement horizontal ou en forage descendant.Such a recovery head has the considerable advantage of being able to be used interchangeably with said removable closure joint for recovering the inner tube of the core barrel without overshot or cable, in upward drilling; and without said removable sealing joint for recovering the inner tube of the core barrel in a conventional manner with overshot and cable, in approximately horizontal drilling or in downhole drilling.

En particulier, dans une telle réalisation de l'invention, le ou les joints périphériques dont est muni le corps cylindrique peuvent notamment être constitués d'une bague amovible entourant le corps cylindrique, le tube à embase étant taraudé de manière à être vissé sur le corps cylindrique en maintenant en place la bague contre une butée périphérique du corps cylindrique, tandis que la tige axiale portant le second joint d'obturation est pouvue d'une butée coopérant avec l'embase de manière à pouvoir serrer le premier joint d'obturation amovible contre l'alésage de communication lorsque le tube à embase est vissé sur le corps cylindrique.In particular, in such an embodiment of the invention, the peripheral seal (s) with which the cylindrical body is provided may in particular consist of a removable ring surrounding the cylindrical body, the base tube being tapped so as to be screwed onto the cylindrical body while holding the ring in place against a peripheral stop of the cylindrical body, while the axial rod carrying the second sealing joint is provided with a stop cooperating with the 'base so as to be able to tighten the first removable sealing joint against the communication bore when the base tube is screwed onto the cylindrical body.

Une réalisation spécifique de Il invention peut également consister en un développement particulier d'une tête de récupération pour tube intérieur de carottier de forage du type coulissable et verrouillable dans un train de tubes extérieurs, déverrouillable sous l'effet d'une traction, comprenant

  • - un corps cylindrique muni d'un moyen de raccord au dispositif de déverrouillage du tube intérieur du carottier et traversé d'un alésage de communication entre ses deux extrémités;
  • - une bague s'engageant sur ledit corps cylindrique jusqu'à une butée périphérique de celui-ci, cette bague constituant ou portant un des joint(s) d'étanchéité par rapport au train de tubes extérieur;
  • - un tube taraudé à l'une de ses extrémités de manière à pouvoir être vissé sur ledit corps cylindrique en maintenant en place ladite bague, et pourvu à l'autre extrémité d'une ou plusieurs ouvertures de communication entre sa cavité interne et l'extérieur, et d'une embase traversée d'une tige axiale, elle-même munie à son extrémité située à l'intérieur du tube à embase d'un joint d'obturation dudit alésage du corps cylindrique et à son extrémité située à l'extérieur du tube à embase d'un crochet tronconique, un ressort hélicoïdal étant logé autour de ladite tige axiale et prenant appui contre ladite embase et contre ledit joint d'obturation de manière à appliquer ledit joint d'obturation contre ledit alésage lorsqu'aucune traction n'est exercée sur ledit crochet tronconique, développement qui se différentie des têtes connues de ce type, par le fait :
  • - que le moyen de raccordement du corps cylindrique au dispositif de déverrouillage du tube intérieur du carottier permet le coulissement de la tête de récupération par rapport au dispositif de déverrouillage entre deux positions extrêmes; et
  • - qu'une pièce auxiliaire est prévue de manière à maintenir l'alésage du corps cylindrique obturé même lorsqu'une pression est exercée sur s l'obturation par l'intérieur de l'alésage.
A specific embodiment of the invention may also consist of a particular development of a recovery head for an inner tube of a drill core of the sliding and lockable type in a train of external tubes, unlockable under the effect of a traction, comprising
  • - a cylindrical body provided with a means of connection to the device for unlocking the inner tube of the core barrel and traversed by a communication bore between its two ends;
  • - A ring engaging on said cylindrical body as far as a peripheral abutment thereof, this ring constituting or carrying one of the seal (s) relative to the train of outer tubes;
  • - a threaded tube at one of its ends so as to be able to be screwed onto said cylindrical body while maintaining said ring in place, and provided at the other end with one or more communication openings between its internal cavity and the exterior, and of a base through which an axial rod passes, itself provided at its end situated inside the base tube with a sealing joint for said bore of the cylindrical body and at its end situated at the outside of the base tube of a frustoconical hook, a helical spring being housed around said axial rod and bearing against said base and against said sealing joint so as to apply said sealing joint against said bore when no traction is exerted on said frustoconical hook, a development which differs from known heads of this type, by the fact:
  • - That the means for connecting the cylindrical body to the device for unlocking the inner tube of the core barrel allows the recovery head to slide relative to the unlocking device between two extreme positions; and
  • - An auxiliary part is provided so as to maintain the bore of the closed cylindrical body even when pressure is exerted on the obturation by the interior of the bore.

Selon une caractéristique complémentaire de l'invention, cette pièce auxilière peut notamment consister en un joint amovible serré en position d'obturation de l'alésage lors du vissage du tube à embase sur le corps cylindrique.According to an additional characteristic of the invention, this auxiliary part may in particular consist of a removable tight seal in the closed position of the bore when the base tube is screwed onto the cylindrical body.

D'autres détails et particularités de l'invention apparaîtront de la description suivante et des dessins annexés qui se rapportent à quelques formes de réalisation de l'invention, données seulement à titre d'exemples non limitatifs.Other details and particularities of the invention will appear from the following description and from the appended drawings which relate to some embodiments of the invention, given only by way of nonlimiting examples.

Dans ces dessins :

  • - la figure 1 est une vue en coupe d'une première réalisation d'une tête de récupération selon l'invention, utilisée en forage montant, représentée en position de forage;
  • - la figure 2 est une vue équivalente à la figure 1,représentée en position d'attente (avant le déverrouillage du dispositif de blocage du tube intérieur du carottier);
  • - la figure 3 est une vue équivalente aux figures 1 et 2, représentée après déverrouillage du dispositif de blocage du carottier;
  • - la figure 4 est une vue en coupe d'une autre réalisation d'une tête de récupération selon l'invention à usage mixte pour forages montants, approximativement horizontaux et descendants, utilisée en forage montant, représentée en position de forage;
  • - la figure 5 est une vue équivalente à la figure 4,repré- ; sentée en position d'attente (avant le déverrouillage du dispositif de blocage du tube intérieur du carottier);
  • - la figure 6 est une vue en coupe de la même tête de récupération que celle représentée aux figures 4 et 5, toutefois utilisée en version pour forage approximativement horizontal ou descendant et représentée en position de forage dans un forage descendant;
  • - la figure 7 est une vue équivalente à la figure 6,montrant la récupération du tube intérieur du carottier avec overshot et câble, représentée en position déverrouillée du dispositif de blocage du tube intérieur du carottier.
In these drawings:
  • - Figure 1 is a sectional view of a first embodiment of a recovery head according to the invention, used in rising drilling, shown in the drilling position;
  • - Figure 2 is a view equivalent to Figure 1, shown in the standby position (before unlocking the locking device of the inner tube of the core barrel);
  • - Figure 3 is a view equivalent to Figures 1 and 2, shown after unlocking of the corer blocking device;
  • - Figure 4 is a sectional view of another embodiment of a recovery head according to the invention for mixed use for rising holes, approximately horizontal and downward, used in rising drilling, shown in the drilling position;
  • - Figure 5 is a view equivalent to Figure 4, shown ; felt in the waiting position (before unlocking the locking device of the inner tube of the core barrel);
  • - Figure 6 is a sectional view of the same recovery head as that shown in Figures 4 and 5, however used in version for approximately horizontal or downhole drilling and shown in the drilling position in a downhole;
  • - Figure 7 is a view equivalent to Figure 6, showing the recovery of the inner tube of the core barrel with overshot and cable, shown in the unlocked position of the locking device of the inner tube of the core barrel.

Dans ces diverses figures les mêmes symboles de référence sont utilisés pour désigner des éléments identiques ou équivalents.In these various figures, the same reference symbols are used to designate identical or equivalent elements.

Les figures 1 à 3 illustrent un premier mode de réalisation du nouveau système de récupération du tube intérieur de carottiers selon l'invention.Figures 1 to 3 illustrate a first embodiment of the new system for recovering the inner tube of corers according to the invention.

Le dispositif de carottage en forage montant mis en oeuvre se compose essentiellement d'un train de tube intérieur 2, coulissable à l'intérieur d'un train de tubes extérieurs 1, et muni d'une tête de récupération 3 selon un premier mode de réalisation de l'invention.The riser coring device used essentially consists of an inner tube train 2, slidable inside an outer tube train 1, and provided with a recovery head 3 according to a first mode of realization of the invention.

L'ensemble du carottier 2 et de la tête de récupération 3 sont verrouillés (figures 1 et 2) dans le train de tubes extérieurs 1, au moyen d'un dispositif de blocage 4, s'accrochant dans une rainure circonférentielle 31 du tube extérieure par les pattes 32 d'un verrou 33, sollicitées vers l'extérieur par un ressort 34.The entire core barrel 2 and the recovery head 3 are locked (FIGS. 1 and 2) in the outer tube train 1, by means of a locking device 4, hooking in a circumferential groove 3 1 of the tube outside by the lugs 32 of a lock 33, urged outwards by a spring 34.

Le déverrouillage de ce dispositif de blocage 4 est provoqué par un dispositif 7, constitué par un porte-verrou tubulaire 35, solidaire du tube intérieur, et d'une coulisse de déverrouillage 36 qui porte une goupille de déverrouillage 37 et qui est coulissable dans le porte-verrou tubulaire 35.The unlocking of this blocking device 4 is caused by a device 7, constituted by a tubular latch holder 35, integral with the inner tube, and an unlocking slide 36 which carries an unlocking pin 37 and which is slidable in the tubular lock holder 35.

Lorsqu'une traction est exercée sur la coulisse de déverrouillage 36, celle-ci se déplace par rapport au porte-verrou 35 et au verrou 33, d'une distance correspondant à l'évidement de coulissage 3S dans cette coulisse, pour l'axe d'attache 39 du verrou 33.When traction is exerted on the unlocking slide 36, the latter moves relative to the latch holder 35 and to the latch 33, by a distance corresponding to the sliding recess 3S in this slide, for the axis of attachment 39 of lock 33.

La goupille 37 vient ainsi dégager les pattes 32 du verrou 33 hors de la rainure de verrouillage 31.The pin 37 thus releases the lugs 32 of the lock 33 from the locking groove 31.

La tête de récupération 3 selon l'invention est raccordée à cette coulisse 36 par l'intermédiaire d'un raccord coulissable 8, formé par une goupille 40 fixée à la coulisse 36 et introduite dans un évidement allongé 41 dans l'extrémité de la tête de récupération 3. Cette tête de récupération 3, dans sa version représentée aux figures 1 à 3, est constituée d'un corps cylindrique 10, composé de deux éléments cylindriques 42 et 43, vissés l'un à l'autre en coinçant une bague 25 munie de joints périphériques 6 capables de former joint d'étanchéité par rapport à l'alésage du tube extérieur 1; la tête de récupération 3 peut en outre être pourvue d'un crochet tronconique 23, permettant par exemple l'accrochage d'une pièce de récupération avec câble, si nécessaire.The recovery head 3 according to the invention is connected to this slide 36 by means of a sliding connection 8, formed by a pin 40 fixed to the slide 36 and inserted into an elongated recess 41 in the end of the head recovery 3. This recovery head 3, in the version shown in Figures 1 to 3, consists of a cylindrical body 10, composed of two cylindrical elements 42 and 43, screwed to each other by wedging a ring 25 provided with peripheral seals 6 capable of forming a seal relative to the bore of the outer tube 1; the recovery head 3 can also be provided with a frustoconical hook 23, allowing for example the attachment of a recovery piece with cable, if necessary.

Lors du forage en forage montant le tube inté- rieur du carottier 2 se trouve verrouillé dans le tube extérieur 1, avec la tête de récupération 3 dans la position représentée à la figure 1.When drilling in the drilling tube amount i nt E- interior of the core barrel 2 is locked in the outer tube 1, with the recovery head 3 in the position shown in Figure 1.

La tête de récupération 3 est maintenue dans cette position supérieure par suite de la pression hydraulique exercée par le liquide de forage envoyé sous pression vers la tête de forage.The recovery head 3 is held in this upper position as a result of the hydraulic pressure exerted by the drilling liquid sent under pressure to the drilling head.

Les joints périphériques 6 sont ainsi maintenus en face d'un évidement périphérique 5 dans l'alésage du tube extérieur 1, laissant un passage pour la circulation du liquide de forage.The peripheral seals 6 are thus held opposite a peripheral recess 5 in the bore of the outer tube 1, leaving a passage for the circulation of the drilling liquid.

Lorsqu'on coupe la pression hydraulique sur le liquide de forage, la tête de récupération 3 redescend en position inférieure, représentée à la figure 2, avec les joints périphériques 6 en relation d'étanchéité avec l'alésage du tube extérieur 1, et avec l'arrière de l'évidement allongé 41 en abutement avec la goupille 40 de la coulisse 36.When the hydraulic pressure on the drilling fluid is cut, the recovery head 3 descends to the lower position, represented in FIG. 2, with the peripheral seals 6 in sealing relation with the bore of the outer tube 1, and with the rear of the elongated recess 41 abutting with the pin 40 of the slide 36.

Lorsqu'ensuite on libère la colonne de liquide de forage au bas du train de tubes, son poids exerce une traction brutale sur la tête de récupération 3 faisant office de piston, et cette traction est transmise à la coulisse de déverrouillage 36 par l'intermédiaire de la goupille 40.When the column of drilling fluid is released at the bottom of the tube train, its weight exerts a brutal traction on the recovery head 3 acting as a piston, and this traction is transmitted to the unlocking slide 36 by means of the pin 40.

La goupille de déverrouillage 37 vient ainsi agir sur le verrou 33 de manière à dégager les pattes 32 hors de la rainure 31, et à libérer le train de tige intérieur 2; ce train de tige intérieur 2 entamera ainsi une descente dans le train de tube extérieur 1 (cf. figure 3), par suite de son propre poids et de la dépression exercée par la colonne de liquide de forage.The unlocking pin 37 thus acts on the latch 33 so as to release the tabs 32 from the groove 31, and to release the inner rod train 2; this inner rod train 2 will thus start a descent into the outer tube train 1 (cf. FIG. 3), due to its own weight and to the vacuum exerted by the column of drilling liquid.

Les figures 4 et 5 illustrent un second mode de réalisation du nouveau système de récupération de carottiers selon l'invention, en forage montant. Le fonctionnement du système est tout à fait semblable à celui décrit ci-dessus en référence aux figures 1 à 3.Figures 4 and 5 illustrate a second embodiment of the new corer recovery system according to the invention, in rising drilling. The operation of the system is entirely similar to that described above with reference to FIGS. 1 to 3.

Le dispositif de récupération qui y est mis en oeuvre est toutefois différent en ce qu'il s'agit d'un dispositif à usage mixte pouvant être utilisé aussi bien pour la récupération du carottier sans overshot ni câble en forage montant que pour la récupération du carottier de manière conventionnelle en forage horizontal ou descendant.The recovery device used therein, however, is different in that it is a mixed-use device that can be used both for the recovery of the core barrel without overshot or cable in rising drilling as for the recovery of the Corer in a conventional manner in horizontal or downhole drilling.

Ce dispositif est constitué d'un corps cylindrique 10 et d'un tube 16 à embase 17, vissé sur le corps cylindrique par un taraudage 26, en coinçant une bague 25 munie de joints périphériques 6.This device consists of a cylindrical body 10 and a tube 16 with base 17, screwed onto the cylindrical body by a thread 26, wedging a ring 25 provided with peripheral seals 6.

Le corps cylindrique 10 est raccordé à la coulisse de déverrouillage 36 par un raccord coulissant 8 et est traversé par un alésage de communication 11 entre ses deux extrémités 12, 13.The cylindrical body 10 is connected to the unlocking slide 36 by a sliding connector 8 and is traversed by a communication bore 11 between its two ends 12, 13.

Lors de son utilisation en forage montant dans le nouveau système de récupération du carottier selon l'invention, cet alésage de communication 11 entre les deux extrémités 12, 13 du corps cylindrique situées de part et d'autre des joints périphériques 6, est obturé au moyen d'un joint amovible 14. Ce joint amovible 14 est maintenu en place dans la cavité 19 du tube 16 à embase 17 par une tige axiale 20 qui s'étend au travers de ce tube 16 à embase 17, qui appuie avec son extrémité 22 contre ce joint amovible 14 et qui prend appui de l'autre côté contre l'embase 17 par une butée 28 de cette tige axiale.When it is used in upward drilling in the new corer recovery system according to the invention, this communication bore 11 between the two ends 12, 13 of the cylindrical body located on either side of the peripheral seals 6, is closed at by means of a removable seal 14. This removable seal 14 is held in place in the cavity 19 of the tube 16 at base 17 by an axial rod 20 which extends through this tube 16 with base 17, which presses with its end 22 against this removable seal 14 and which bears on the other side against the base 17 by a stop 28 of this axial rod.

Dans ce mode d'utilisation du dispositif représenté, dans lequel le joint amovible 14 obture l'alésage de communication 11 entre les extrémités 12, 13 du corps cylindrique 10, le liquide de forage ne peut pas circuler par l'intérieur de ce corps cylindrique, au travers d'ouvertures 18 prévues dans le tube 16 à embase 17.In this mode of use of the device shown, in which the removable seal 14 closes the communication bore 11 between the ends 12, 13 of the cylindrical body 10, the drilling fluid cannot circulate through the interior of this cylindrical body , through openings 18 provided in the tube 16 with base 17.

Dans ce mode d'utilisation, le dispositif a par conséquent identiquement la même fonction que le dispositif décrit plus haut en référence aux figures 1 à 3, c'est-à-dire qu'en cours de forage le liquide de forage peut circuler par un évidement périphérique dans l'alésage du tube extérieur 1 (figure 4), et lors de la coupure de la pression hydraulique sur le liquide de foragele dispositif descend en position d'étanchéité des joints périphériques 6 avec l'alésage du tube extérieur (figure 5).In this mode of use, the device therefore identically has the same function as the device described above with reference to FIGS. 1 to 3, that is to say that during drilling the drilling liquid can circulate by a peripheral recess in the bore of the outer tube 1 (FIG. 4), and when the hydraulic pressure on the drilling fluid is cut off, the device descends into the sealing position of the peripheral seals 6 with the bore of the outer tube (FIG. 5).

Les figures 6 et 7 quand à elles illustrent l'utilisation de ce nouveau dispositif selon l'invention pour la récupération d'un tube intérieur de carottier de manière conventionnelle avec overshot 30 et câble 29,en forage descendant.Figures 6 and 7 when they illustrate the use of this new device according to the invention for the recovery of an inner core barrel in a conventional manner with overshot 30 and cable 29, in downhole drilling.

Dans ce mode de mise en oeuvre, le nouveau dispositif selon l'invention est utilisé sans le joint d'obturation amovible 14 pour l'alésage de communication 11 dans le corps cylindrique 10. En position de forage (figure 6) le train de tube intérieur 2 (le carottier) se trouve verrouillé dans le train de tube extérieur par le dispositif de blocage 4.In this embodiment, the new device according to the invention is used without the removable sealing joint 14 for the communication bore 11 in the cylindrical body 10. In the drilling position (FIG. 6) the tube train inside 2 (the core barrel) is locked in the outside tube train by the locking device 4.

Un ressort 24, prenant appui contre l'embase 17 du tube 16 à embase et contre la butée 18 de la tige axiale 20, applique l'extrémité ea forme de joint d'obturation 22 de cette tige contre l'alésage de communication 11 entre les extrémités 12, 13 du corps cylindrique 10. Lors du forage (en trou descendant) la tête de récupération 3 se trouve toutefois en position inférieure du raccord coulissant 8 par rapport au dispositif de déverrouillage 7, par suite de la pression hydraulique du liquide de forage (et par le propre poids de la tête de récupération). Le liquide de forage peut de ce fait circuler vers la tête de forage par l'évidement périphérique 5 dans l'alésage du tube extérieur.A spring 24, bearing against the base 17 of the tube 16 with base and against the stop 18 of the axial rod 20, applies the end ea in the form of a sealing joint 22 of this rod against the communication bore 11 between the ends 12, 13 of the body cylindrical 10. During drilling (in downhole) the recovery head 3 is however in the lower position of the sliding connector 8 relative to the unlocking device 7, due to the hydraulic pressure of the drilling liquid (and by its own weight recovery head). The drilling liquid can therefore circulate towards the drilling head through the peripheral recess 5 in the bore of the outer tube.

Pour récupérer le carottier 2 on descend un overshot 29 dans le train de tube extérieur 1, à l'aide d'un câble 30.To recover the core barrel 2, an overshot 29 is lowered into the outer tube train 1, using a cable 30.

Lorsque l'overshot 29 atteint la tête de récupération 3, la pince d'accrochage 50 de l'overshot s'agrippe sur le crochet tronconique 23 de la tête de récupération.When the overshot 29 reaches the recovery head 3, the gripping clamp 50 of the overshot grips on the frustoconical hook 23 of the recovery head.

Lorsqu'on exerce ensuite une traction sur le câble 30, la pince 50 extrainera la tige axiale 20 à l'encontre du ressort 24. La tige 20 viendra alors appuyer contre l'embase 17 du tube à embase 16, par sa butée 28, et entrainera de ce fait la tête de récupération 3 vers le haut, en position d'étanchéité des joints périphériques 6 par rapport à l'alésage du tube extérieur 1.When a traction is then exerted on the cable 30, the clamp 50 will extend the axial rod 20 against the spring 24. The rod 20 will then come to press against the base 17 of the base tube 16, by its stop 28, and will therefore cause the recovery head 3 upwards, in the sealing position of the peripheral seals 6 relative to the bore of the outer tube 1.

Par suite du retrait du joint d'obturation 22 de l'alésage de communication 11 dans le corps cylindrique, avec la tige axiale 20, la colonne de liquide de forage située au-dessus de la tête de récupération 3 et de ses joints périphériques d'étanchéité 6, pourra s'écouler au travers des ouvertures 18 dans le tube 16 à embase 17 et de l'alésage 11 dans le corps cylindrique 10, lors de la remontée du train de tige intérieur.Following the withdrawal of the sealing joint 22 from the communication bore 11 in the cylindrical body, with the axial rod 20, the column of drilling liquid situated above the recovery head 3 and its peripheral seals d 'seal 6, can flow through openings 18 in the tube 16 with base 17 and the bore 11 in the cylindrical body 10, during the ascent of the inner rod train.

La tête de récupération ayant ainsi atteint la position supérieure du raccord coulissant 8 par rapport au dispositif de déverrouillage 7, la remontée du câble 30 et de l'overshot 20 entrainera la coulisse de déverrouillage vers le haut, provoquant ainsi le dégagement des pattes 32 du verrou 33 par la goupille 37 (figure 7) et permettant de ce fait la remontée du train de tige intérieur 1.The recovery head having thus reached the upper position of the sliding connector 8 relative to the unlocking device 7, the raising of the cable 30 and the overshot 20 will cause the slide for unlocking upwards, thereby causing the lugs 32 of the latch 33 to be released by the pin 37 (FIG. 7) and thereby allowing the internal rod train 1 to rise.

Il est évident que l'invention n'est pas exclusivement limitée aux modes et formes de réalisation représentées et que bien des modifications peuvent être apportées dans la forme, la disposition et la constitution de certains des éléments intervenant dans sa réalisation à condition que ces modifications ne soient pas en contradiction avec l'objet des revendications suivantes.It is obvious that the invention is not exclusively limited to the modes and embodiments shown and that many modifications can be made in the form, arrangement and constitution of some of the elements involved in its realization provided that these modifications do not contradict the subject of the following claims.

Claims (11)

1. Nouveau système de récupération d'un carottier de forage du type coulissable et verrouillable dans un train de tubes extérieurs (1),dans des forages montants, caractérisé par le fait que le train de tube intérieur (carottier) (2) est muni d'une tête de récupération (3) pouvant former piston d'étanchéité dans le tube extérieur (1), et que l'on utilise la force exercée sur cette tête de récupération (3) par la libération de la colonne de liquide de forage au bas du train de forage pour le déverrouillage du dispositif de blocage (4) du train de tube intérieur (carottier) (2) par rapport au tube extérieur (1), et pour la récupération du carottier, en évitant ainsi l'utilisation d'un câble et/ou d'un overshot.1. New system for recovering a drill core of the sliding and lockable type in a train of outer tubes (1), in rising holes, characterized in that the inner tube train (core barrel) (2) is provided a recovery head (3) capable of forming a sealing piston in the outer tube (1), and that use is made of the force exerted on this recovery head (3) by the release of the column of drilling liquid at the bottom of the drill string for unlocking the locking device (4) of the inner tube train (core barrel) (2) relative to the outer tube (1), and for recovering the core barrel, thus avoiding the use of '' a cable and / or an overshot. 2. Système selon la revendication 1, caractérisé par le fait que lors du forage ladite tête de récupération (3) laisse subsister un passage (5) pour la circulation du liquide de forage vers la tête de forage, tandis que lors de la coupure de la pression hydraulique dudit liquide de forage, ladite tête de récupération (3) forme piston d'étanchéité par rapport au tube extérieur (1).2. System according to claim 1, characterized in that during drilling said recovery head (3) leaves a passage (5) for the circulation of drilling liquid to the drilling head, while during cutting the hydraulic pressure of said drilling fluid, said recovery head (3) forms a sealing piston with respect to the outer tube (1). 3. Système selon l'une ou l'autre des revendications précédentes, caractérisé par le fait que ladite tête de récupération (3) comprend un ou plusieurs joint(s) périphériques -(6) de manière telle que, lors du forage, par suite de la pression hydraulique du liquide de forage, le ou lesdits joint(s) périphérique(s) (6) est (sont) maintenu(s) en face d'un ou de plusieurs évidement(s) périphérique(s) (5) dans l'alésage du tube extérieur (1) permettant la circulation du liquide de forage vers la tête de forage, tandis que lors de la coupure de cette pression hydraulique ledit ou lesdits joint(s) périphérique(s) (6) entre(nt) en relation d'étanchéité avec l'alésage du tube extérieur (1), la la libération de la colonne de liquide pouvant ainsi engendrer sur la tête de récupération(3), une force capable de déverrouiller le dispositif de blocage (4) du train de tube intérieur (2).3. System according to either of the preceding claims, characterized in that said recovery head (3) comprises one or more peripheral joint (s) - (6) so that, during drilling, by following the hydraulic pressure of the drilling fluid, the said peripheral joint (s) (6) is (are) held (s) opposite one or more peripheral recess (s) (5 ) in the bore of the outer tube (1) allowing the circulation of the drilling liquid towards the drilling head, while during the cutting of this hydraulic pressure said or said peripheral seal (s) (6) between (s) in sealing relation with the bore of the outer tube (1), the release of the column of liquid thus being able to generate on the recovery head (3) , a force capable of unlocking the locking device (4) of the inner tube train (2). 4. Système selon l'une ou l'autre des revendications précédentes, caractérisé par le fait que la tête de récupération (3) est reliée au dispositif de déverrouillage (7) du tube intérieur au moyen d'un raccord coulissable (8) entre une position supérieure de forage laissant un passage pour la circulation du liquide de forage vers la tête de forage, et une position inférieure de récupération du tube intérieur formant piston d'étanchéité par rapport au tube extérieur (1).4. System according to either of the preceding claims, characterized in that the recovery head (3) is connected to the unlocking device (7) of the inner tube by means of a sliding connection (8) between an upper drilling position leaving a passage for the circulation of the drilling liquid towards the drilling head, and a lower recovery position of the inner tube forming a sealing piston with respect to the outer tube (1). 5. Système selon l'une ou l'autre des revendications précédentes, caractérisé par le fait que la tête de récupération (3) peut également être utilisée pour l'envoi par pression hydraulique du train de tube intérieur (2) vers la tête de forage.5. System according to either of the preceding claims, characterized in that the recovery head (3) can also be used for sending the inner tube train (2) by hydraulic pressure to the head of drilling. 6. Nouvelle tête de récupération (3) d'un tube intérieur de carottier de forage (2) du type coulissable et verrouillable dans un train de tubes extérieurs (1), déverrouillable sous l'effet d'une traction, caractérisée par le fait que cette tête de récupération (3) comprend : des moyens de raccordement (8) au dispositif de déverrouillage du tube intérieur du carottier, et des moyens d'étanchéité (6) hydraulique par rapport au tube extérieur (1), tandis que lesdits moyens de raccordement (8) et lesdits moyens d'étanchéité (6) hydraulique collaborent entre eux et/ou avec des moyens (5) du tube extérieur (1) de manière à permettre, lors d'un forage montant, la circulation du liquide de forage vers la tête de forage et à assurer l'étanchéité hydraulique de ladite tête de récupération (3) par rapport au tube extérieur (1), lors de la coupure de la pression hydraulique sur le liquide de forage.6. New recovery head (3) of an inner core tube (2) of the sliding and lockable type in a train of outer tubes (1), unlockable under the effect of a traction, characterized by the fact that this recovery head (3) comprises: connection means (8) to the device for unlocking the inner tube of the core barrel, and sealing means (6) hydraulic with respect to the outer tube (1), while said means connection (8) and said hydraulic sealing means (6) collaborate with each other and / or with means (5) of the outer tube (1) so as to allow, during an upward drilling, the circulation of the liquid of drilling towards the drilling head and ensuring the hydraulic seal of said recovery head (3) relative to the outer tube (1), when the hydraulic pressure on the drilling fluid is cut off. 7. Tête de récupération (3) d'un carottier (1), selon la revendication 6, caractérisée par le fait qu' elle comprend : - un corps cylindrique (10) coulissable dans le tube extérieur (1); - un moyen de raccord (8) de ce corps cylindrique (10) au dispositif de déverrouillage (7), permettant le coulissement dudit corps cylindrique (10) entre deux positions extrêmes par rapport au dispositif de déverrouillage (7); et - un ou plusieurs joints périphériques (6) sur ledit corps cylindrique (10) permettant à la tête (3) de former piston d'étanchéité dans l'alésage du tube extérieur (1);
de manière telle que lors d'un forage montant la pression hydraulique du liquide de forage maintient la tête de récupération (3) dans sa position supérieure de telle façon que la coopération dudit ou desdits joints (6) d'étanchéité de la tête de récupération (3) avec un ou plusieurs évidement.(s) périphérique(s) (5) du tube extérieur, permet la circulation du liquide de forage vers la tête de forage, tandis que lors de la coupure de la pression hydraulique sur le liquide de forage la tête de récupération se met dans sa position inférieure de telle façon que ladite tête (3) forme piston d'étanchéité dans le tube extérieur (1).7. Recovery head (3) of a core barrel (1), according to claim 6, characterized in that it comprises: - a cylindrical body (10) slidable in the outer tube (1); - A connection means (8) of this cylindrical body (10) to the unlocking device (7), allowing the sliding of said cylindrical body (10) between two extreme positions relative to the unlocking device (7); and - one or more peripheral seals (6) on said cylindrical body (10) allowing the head (3) to form a sealing piston in the bore of the outer tube (1);
in such a way that when drilling up the hydraulic pressure of the drilling liquid keeps the recovery head (3) in its upper position so that the cooperation of said seal (s) (6) of the recovery head (3) with one or more recess. (S) peripheral (s) (5) of the outer tube, allows the circulation of drilling fluid to the drilling head, while during the cut of the hydraulic pressure on the drilling fluid drilling the recovery head moves to its lower position so that said head (3) forms a sealing piston in the outer tube (1). 8. Tête de récupération d'un carottier, selon l'une ou l'autre des revendications précédentes, caractérisée par le fait qu'elle comprend : - un corps cylindrique (10) muni d'un ou plusieurs joints périphériques (6), d'un moyen de raccord coulissant (8) au dispositif de verrouillage (7), et traversé d'un alesage de communication (11) entre les extrémités (12, 13) dudit corps cylindrique situées de part et d'autre dudit ou desdits joints périphériques (6); - un premier joint (14) amovible, capable d' obturer la partie (15) dudit alésage de communication située du côté opposé audit moyen de raccord coulissant (8); - un tube (16) à embase (17) pourvu d'une ou plusieurs ouvertures (18) de communication entre sa cavité interne (19) et l'extérieur, adapté à être fixé sur ledit corps cylindrique (10) du côté (13) opposé audit moyen de raccord coulissant (8) en maintenant en position ledit joint amovible (14), ledit tube (16) à embase (17) s'étendant axialement autour d'une tige axiale (20) traversant ladite embase (17) et munie à son extrémité située à l'intérieur du tube à embase d'un second joint (22) capable d'obturer ledit alésage (11, 15) et a son extrémité située à l'extérieur dudit tube (16) à embase (17) d'un crochet tronconique (23), un ressort hélicoïdal (24) étant logé autour de ladite tige axiale (20) et prenant appui contre ladite embase (17) et contre ledit second joint (22) d'obturation;
ladite tête de récupération (3) d'un carottier (2) pouvant être utilisée soit - avec ledit joint d'obturation amovible (14) pour la récupération du carottier (2) sans overshot ni câble, en forage montant ; soit - sans ledit joint d'obturation amovible (14) pour la récupération du carottier de manière conventionnelle avec overshot(29) et câble (30), en forage approximativement horizontal ou en forage descendant. 8. Recovery head of a core barrel, according to either of the preceding claims, characterized in that it comprises: - a cylindrical body (10) provided with one or more peripheral seals (6), with a sliding connection means (8) to the locking device (7), and traversed by a communication bore (11) between the ends (12, 13) of said cylindrical body located on either side of said one or more peripheral seals (6); - a first removable seal (14) capable of closing off the part (15) of said communication bore located on the side opposite to said sliding connection means (8); - a tube (16) with base (17) provided with one or more openings (18) for communication between its internal cavity (19) and the outside, adapted to be fixed on said cylindrical body (10) on the side (13 ) opposite said sliding connection means (8) while maintaining in position said removable seal (14), said tube (16) with base (17) extending axially around an axial rod (20) passing through said base (17) and provided at its end located inside the base tube with a second seal (22) capable of closing off said bore (11, 15) and at its end situated outside said tube (16) with base ( 17) of a frustoconical hook (23), a helical spring (24) being housed around said axial rod (20) and bearing against said base (17) and against said second sealing joint (22);
said recovery head (3) of a corer (2) which can be used either - With said removable sealing joint (14) for the recovery of the core barrel (2) without overshot or cable, in rising drilling; is - without said removable sealing joint (14) for the recovery of the core barrel in a conventional manner with overshot ( 29 ) and cable (30), in approximately horizontal drilling or in descending drilling. 9. Tête de récupération (3) d'un carottier (2) selon la revendication 8, caractérisée par le fait : - que le ou les joints périphériques (6) dont est muni ledit corps cylindrique (10) est (sont) constitué(s) d'une bague amovible (25) entourant ledit corps cylindrique (10); - que ledit tube (16) à embase (17) est taraudé (26) de manière à être vissé sur ledit corps cylindrique (10) en maintenant en place ladite bague (25) contre une butée périphérique (27) dudit corps cylindrique; et - que ladite tige axiale (20) portant ledit second joint d'obturation (22) est pourvue d'une butée (28) coopérant avec ladite embase (17) de manière à pouvoir serrer ledit premier joint d'obturation amovible (14) contre ledit alésage (11, 15) de communication lorsque ledit tube (16) à embase (17) est vissé sur ledit corps cylindrique (10). 9. Recovery head (3) of a corer (2) according to claim 8, characterized in that: - That the peripheral seal (s) (6) which is provided with said cylindrical body (10) is (are) constituted (s) of a removable ring (25) surrounding said cylindrical body (10); - That said tube (16) with base (17) is threaded (26) so as to be screwed onto said cylindrical body (10) while holding in place said ring (25) against a peripheral stop (27) of said cylindrical body; and - That said axial rod (20) carrying said second sealing joint (22) is provided with a stop (28) cooperating with said base (17) so as to be able to tighten said first removable sealing joint (14) against said communication bore (11, 15) when said base tube (16) (17) is screwed onto said cylindrical body (10). 10. Tête de récupération (3) d'un carottier (2) de forage du type coulissable et verrouillable dans un train de tubes extérieurs (1), déverrouillable sous l'effet d'une traction, laquelle tête (3) comprend : - un corps cylindrique (10) muni d'un moyen de raccord (8) au dispositif de déverrouillage (7) du tube intérieur du carottier (2) et traversé d'un alésage de communication (11) entre ses deux extrémités (12, 13); - une bague (25) s'engageant sur ledit corps cylindrique (10) jusqu'à une butée périphérique (27) de celui-ci, cette bague (25) constituant ou portant un (des) joint(s) (6) d'étanchéité par rapport au train de tubes extérieur (1), - un tube (16) taraudé (26) à l'une de ses extrémités de manière à pouvoir être vissé sur ledit corps cylindrique (10) en maintenant en place ladite bague (25), et pourvu à l'autre extrémité d'une ou plusieurs ouvertures de communication (18) entre sa cavité interne (19) et l'extérieur, et d'une embase (17) traversée d'une tige axiale (20), elle-même munie à son extrémité située à l'intérieur du tube (16) à embase (17) d'un joint d'obturation (22) dudit alésage (11) du corps cylindrique (10) et à son extrémité située à l'extérieur dudit tube (16) à embase (17) d'un crochet tronconique (23), un ressort hélicoïdal (24) étant logé autour de ladite tige axiale (20) et prenant appui contre ladite embase (17) et contre ledit joint d'obturation (22) de manière à appliquer ledit joint d'obturation (22) contre ledit alésage (10) lorsqu'aucune traction n'est exercée sur ledit crochet tronconique (23),
caractérisée par le fait : - que ledit moyen de raccordement (8) dudit corps cylindrique audit dispositif de déverrouillage du carottier permet le coulissement de la tête de récupération (3) par rapport audit dispositif de déverrouillage (7) entre deux positions extrêmes et - qu'une pièce auxiliaire (14) est prévue de manière à maintenir ledit alésage (11) du corps cylindrique (10) obturé même lorsqu'une pression est exercée sur l'obturation par l'intérieur de l'alésage (11). 10. Recovery head (3) of a core drill (2) of the sliding type and lockable in a train of external tubes (1), unlockable under the effect of a traction, which head (3) comprises: - a cylindrical body (10) provided with a connection means (8) to the unlocking device (7) of the inner tube of the core barrel (2) and traversed by a communication bore (11) between its two ends (12, 13); - A ring (25) engaging on said cylindrical body (10) up to a peripheral stop (27) thereof, this ring (25) constituting or carrying one (or more) joint (s) (6) d '' tightness with respect to the outer tube train (1), - a tapped tube (16) (26) at one of its ends so that it can be screwed onto said cylindrical body (10) while holding said ring (25) in place, and provided at the other end with a or several communication openings (18) between its internal cavity (19) and the outside, and a base (17) crossed by an axial rod (20), itself provided at its end located inside of the tube (16) with base (17) of a sealing joint (22) of said bore (11) of the cylindrical body (10) and at its end situated outside of said tube (16) of base (17) a frustoconical hook (23), a helical spring (24) being housed around said axial rod (20) and bearing against said base (17) and against said sealing joint (22) so as to apply said seal obturation (22) against said bore (10) when no traction is exerted on said frustoconical hook (23),
characterized by the fact: - Said connecting means (8) of said cylindrical body to said device for unlocking the core barrel allows the recovery head (3) to slide relative to said unlocking device (7) between two extreme positions and - An auxiliary part (14) is provided so as to maintain said bore (11) of the cylindrical body (10) closed even when pressure is exerted on the closure by the interior of the bore (11). 11. Tête de récupération d'un carottier selon la revendication 10, caractérisée par le fait que ladite pièce auxiliaire (14) consiste en un joint amovible serré en position d'obturation dudit alésage (11) lors du vissage dudit tube (16) à embase (17) sur ledit corps cylindrique (10).11. corer recovery head according to claim 10, characterized in that said auxiliary part (14) consists of a removable seal tight in the closed position of said bore (11) when screwing said tube (16) to base (17) on said cylindrical body (10).
EP80201101A 1980-11-21 1980-11-21 Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose Expired EP0052672B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE8080201101T DE3070343D1 (en) 1980-11-21 1980-11-21 Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose
AT80201101T ATE12288T1 (en) 1980-11-21 1980-11-21 METHOD OF RETRIEVING A DOWNHOLE REPLACEABLE CORE CONTAINER AND A COLLECTION HEAD INTENDED THEREFORE.
EP80201101A EP0052672B1 (en) 1980-11-21 1980-11-21 Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose
US06/322,130 US4418770A (en) 1980-11-21 1981-11-17 Process for retrieving a coring barrel comprising two tubes and retrieving device for such a process
ZA818048A ZA818048B (en) 1980-11-21 1981-11-20 Process for retrieving device for such a process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80201101A EP0052672B1 (en) 1980-11-21 1980-11-21 Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose

Publications (2)

Publication Number Publication Date
EP0052672A1 true EP0052672A1 (en) 1982-06-02
EP0052672B1 EP0052672B1 (en) 1985-03-20

Family

ID=8187053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80201101A Expired EP0052672B1 (en) 1980-11-21 1980-11-21 Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose

Country Status (5)

Country Link
US (1) US4418770A (en)
EP (1) EP0052672B1 (en)
AT (1) ATE12288T1 (en)
DE (1) DE3070343D1 (en)
ZA (1) ZA818048B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4512422A (en) * 1983-06-28 1985-04-23 Rondel Knisley Apparatus for drilling oil and gas wells and a torque arrestor associated therewith
US4736613A (en) * 1986-05-05 1988-04-12 Westinghouse Electric Corp. Nuclear reactor fuel assembly mixing vane repair apparatus
US4832901A (en) * 1986-05-05 1989-05-23 Westinghouse Electric Corp. Nuclear reactor fuel assembly mixing vane repair method
BE1000529A4 (en) * 1987-05-13 1989-01-17 Diamant Boart Sa Device control lock core survey.
US5267620A (en) * 1991-05-01 1993-12-07 Longyear Company Drilling latch apparatus
NO305845B1 (en) * 1997-12-09 1999-08-02 Kongsberg Offshore As Anchoring mechanism for a guide post
EP2132395B1 (en) * 2007-03-03 2019-02-20 Longyear TM, Inc. High productivity core drilling system
US9359847B2 (en) 2007-03-03 2016-06-07 Longyear Tm, Inc. High productivity core drilling system
US7967085B2 (en) * 2008-04-22 2011-06-28 Longyear Tm, Inc. Braking devices for use in drilling operations
WO2010096860A1 (en) * 2009-02-25 2010-09-02 2Ic Australia Pty Ltd Head assembly
US8794355B2 (en) * 2009-10-07 2014-08-05 Longyear Tm, Inc. Driven latch mechanism
US8485280B2 (en) * 2009-10-07 2013-07-16 Longyear Tm, Inc. Core drilling tools with retractably lockable driven latch mechanisms
US9399898B2 (en) 2009-10-07 2016-07-26 Longyear Tm, Inc. Core drilling tools with retractably lockable driven latch mechanisms
US8869918B2 (en) 2009-10-07 2014-10-28 Longyear Tm, Inc. Core drilling tools with external fluid pathways
US9528337B2 (en) 2009-10-07 2016-12-27 Longyear Tm, Inc. Up-hole bushing and core barrel head assembly comprising same
CA2784195C (en) * 2011-08-01 2014-08-05 Groupe Fordia Inc. Core barrel assembly including a valve
DE102012209921A1 (en) * 2012-06-13 2013-12-19 Areva Gmbh grab
CN105156057B (en) * 2015-07-01 2017-08-08 吉林大学 It is a kind of to position hitch with the wire line coring notified in place
CN105089530B (en) * 2015-08-12 2017-11-14 新疆华隆油田科技股份有限公司 Anti- return of washing well tells control valve gear
CN112377131B (en) * 2020-10-29 2022-09-06 中煤科工集团西安研究院有限公司 Nearly-horizontal directional continuous coring device and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340939A (en) * 1965-08-27 1967-09-12 Longyear E J Co Core lifter apparatus
US3704756A (en) * 1971-07-19 1972-12-05 Boyles Ind Ltd Apparatus for lowering and retrieving a core barrel
US3704755A (en) * 1971-06-18 1972-12-05 Boyles Ind Ltd Retrieving and lowering system for a core barrel
US3777826A (en) * 1971-09-15 1973-12-11 Boyles Ind Ltd Fluid responsive core barrel system
FR2359273A1 (en) * 1976-07-20 1978-02-17 Diamant Boart Sa Cable type coring system - with adjustable water cooling control valve preventing destruction of drill bit on failure of cooling water supply

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2656151A (en) * 1949-08-10 1953-10-20 Herbert T Miller Removable drop-in type back-pressure valve for drill strings
US2857138A (en) * 1954-07-02 1958-10-21 Longyear E J Co Core barrel
DE2817194C2 (en) * 1977-05-03 1984-05-03 Diamant Boart S.A., Bruxelles Core drill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340939A (en) * 1965-08-27 1967-09-12 Longyear E J Co Core lifter apparatus
US3704755A (en) * 1971-06-18 1972-12-05 Boyles Ind Ltd Retrieving and lowering system for a core barrel
US3704756A (en) * 1971-07-19 1972-12-05 Boyles Ind Ltd Apparatus for lowering and retrieving a core barrel
US3777826A (en) * 1971-09-15 1973-12-11 Boyles Ind Ltd Fluid responsive core barrel system
FR2359273A1 (en) * 1976-07-20 1978-02-17 Diamant Boart Sa Cable type coring system - with adjustable water cooling control valve preventing destruction of drill bit on failure of cooling water supply

Also Published As

Publication number Publication date
EP0052672B1 (en) 1985-03-20
ZA818048B (en) 1982-11-24
DE3070343D1 (en) 1985-04-25
ATE12288T1 (en) 1985-04-15
US4418770A (en) 1983-12-06

Similar Documents

Publication Publication Date Title
EP0052672A1 (en) Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose
EP2417323B1 (en) Locking device for a drilling device
CA2189269A1 (en) Reloring and stabilising machine for the drilling of an oil well
BE1000529A4 (en) Device control lock core survey.
FR2579663A1 (en) RECOVERABLE DOWNHOLE BIT
FR2563271A1 (en) LOCKING AND LOWERING TOOL ASSEMBLY AND DOWNHOLE TOOL FOR POSITIONING AND BLOCKING LOCKING CHUCK IN INTERNAL RACK CONNECTION
FR2507241A1 (en) APPARATUS FOR BEING PLACED IN A WELL PIPE FOR REALIZING A SHUTTER BETWEEN THIS CONDUCT AND AN ELEMENT PROVIDED WITHIN THE SAID CONDUCT
FR2653199A1 (en) FLUID FLOW CONTROL VALVE IN A FLUID TRANSPORT DUCT IN A UNDERGROUND WELL AND METHOD FOR OPERATING A WELL BOTTOM VALVE.
FR2613765A1 (en) PACKER FOR DOUBLE COLUMNS AND METHOD FOR PLACING IT IN A WELL
EP0321610B1 (en) Oil well safety valve and setting and retrieving tools for such a valve
FR2497917A1 (en) LOCKING DEVICE THAT CAN BE UNLOCKED
FR2484522A1 (en) EQUALIZATION VALVE AND SHOCK ABSORBER FOR A TOOL CHAPELET IN A WELLBORE
FR2615897A1 (en) LOCKING DEVICE FOR A TOOL IN A HYDROCARBON WELL
FR2511074A1 (en) SYSTEM FOR COMPLETING AND TESTING A WELL AND METHOD FOR TESTING A WELL
CA1330756C (en) Safety valve for production well
WO2004029401A1 (en) One-step directional coring or drilling system
FR2458670A1 (en) TURBINE CARROT DEVICE WITH FOLLOWING TUBE
EP1492935A1 (en) Method and device for coring and/or directional drilling
FR2547348A1 (en) WATERPROOF ANCHOR ASSEMBLY
BE1004330A3 (en) Dual core drilling devie.
FR2709326A1 (en) Set for coiled tubing, of selective gas extraction, which can be recovered.
OA10544A (en) Method and means for the recovery of a petroleum well in the event of a defect in the hydraulic control line of its bottom safety valve
FR2540194A1 (en) AXIAL ALTERNATIVE DISPLACEMENT CYLINDER WITH FLUID CONTROL
FR2519687A1 (en) REINSERABLE AND WATERPROOF DEVICE FOR HANGING PROBE FILTER AND TUBING ELEMENT
BE1011199A3 (en) Core drill

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19820624

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 12288

Country of ref document: AT

Date of ref document: 19850415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3070343

Country of ref document: DE

Date of ref document: 19850425

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19851130

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19890919

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19890920

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19891030

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19891128

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19901121

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19901130

Ref country code: CH

Effective date: 19901130

Ref country code: BE

Effective date: 19901130

BERE Be: lapsed

Owner name: DIAMANT BOART S.A.

Effective date: 19901130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19911130

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920217

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19921122

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19930601

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19941108

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19941116

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19941122

Year of fee payment: 15

EUG Se: european patent has lapsed

Ref document number: 80201101.5

Effective date: 19930610

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19951121

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19951121

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST