EP0293355A1 - Device to control the bolting of a core drilling machine - Google Patents

Device to control the bolting of a core drilling machine Download PDF

Info

Publication number
EP0293355A1
EP0293355A1 EP88870037A EP88870037A EP0293355A1 EP 0293355 A1 EP0293355 A1 EP 0293355A1 EP 88870037 A EP88870037 A EP 88870037A EP 88870037 A EP88870037 A EP 88870037A EP 0293355 A1 EP0293355 A1 EP 0293355A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
piston
finger
hydraulic pressure
outer tube
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
EP88870037A
Other languages
German (de)
French (fr)
Other versions
EP0293355B1 (en
Inventor
Charles Pierre Hallez
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
Publication of EP0293355A1 publication Critical patent/EP0293355A1/en
Application granted granted Critical
Publication of EP0293355B1 publication Critical patent/EP0293355B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • E21B23/042—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 using a single piston or multiple mechanically interconnected pistons

Definitions

  • the present invention relates to a device for controlling the locking of a cable sounder corer for a wet well, this corer comprising an outer tube in which slides an inner tube consisting of a hooking head and a cylindrical body optionally provided with a hydraulic seal with the outer tube and means for locking the inner tube relative to the outer tube.
  • Belgian device No. 900 733 discloses a device of the type described in the first paragraph of this specification.
  • a bistable retractable lock ensures the hydraulic sealing of the inner tube with the outer tube, when this lock is pushed to a lower position by hydraulic pressure by means of a pump for injecting the drilling liquid, c that is to say when said pressure of the drilling liquid exceeds a predetermined value.
  • the lock allows the circulation of the drilling liquid when the pressure is less than said value, but greater than the return force necessary for the opening of a valve for adjusting the flow rate of the drilling liquid.
  • This device although improved, has the disadvantage of being technically complex and easily jammed in the presence of drilling mud which prevents the bistable lock from performing a rotational movement around a vertical axis to occupy the positions lower and upper prescribed.
  • This device also does not make it possible to restore, by a simple operation, the device for controlling the locking of a drilling core barrel in its initial state.
  • the device according to the invention aims to remedy these drawbacks, while retaining the advantages of the known locking control device, that is to say a device which does not require checking from the evolution of the pressure d water to the injection pump, if the lockout has actually taken place.
  • the device according to the present invention of the type described in the first paragraph of this specification, is characterized in that it comprises a deflecting envelope, a sleeve and a piston movable relative to each other and relative to the core barrel, as well as a means associated with the sleeve or the piston for securing them to each other when a hydraulic pressure greater than a predetermined value has brought the piston into a lower position which ensures the hydraulic sealing of the inner tube with the outer tube, so that when the hydraulic pressure is reduced to a value lower than the predetermined value, the sleeve integral with the piston is brought into a higher position, such that it allows the circulation of the drilling fluid between the outer tube and the inner tube through the baffle.
  • the piston is subjected during drilling to a hydraulic pressure on the one hand and to a counterforce on the other hand, of predetermined value which opposes the displacement of the piston under the action of hydraulic pressure, so that the piston can only be fixed to the sleeve when the hydraulic pressure applied to the piston is greater than this predetermined value and the means for fixing the piston to the sleeve consists of at least one finger which can protrude again both in the sleeve and in the piston.
  • the piston has a head having a cavity in which the finger intended to secure the piston to the sleeve is at least partially inserted and is preferably subjected to the action of a force so as to ensure a permanent contact of this part with a surface of the sleeve when the piston not yet integral with the sleeve is brought into the aforementioned lower position by hydraulic pressure.
  • FIG. 1 shows a cable corer designated as a whole by the reference notation 1.
  • This corer 1 comprises a tube 2 provided at one end 3 with a sounding ring 4 and at the other end with a thread of assembly.
  • This core barrel 1 also comprises an inner tube 5 coaxial with the tube 2 and equipped at its end 6 adjacent to the crown 4, with a core extractor sleeve 7.
  • the inner tube 5 is brought into the coring position by letting it slide along the tube 2 in free fall if the hole is wet or using an inshot in a dry hole. In the latter case, the inshot itself serves as a locking control.
  • the inner tube 5 is suspended in the outer tube 1 by an annular rim 8 bearing on a ring or suspension stop 9 secured to the outer tube 2.
  • the core barrel is provided at its upstream part with a latch holder 10 and a latching head 11 which has a frustoconical hook 12.
  • the latching head 11 is introduced into a slide 14 of the latch holder 10 and is connected to the latter by a pin 15.
  • the slide 14 has a diametrical slot 16, as well as two diametrically opposite elongated openings 17.
  • the unlocking pin 15 can slide relative to the latch holder 10.
  • the unlocking slide 14 carries an unlocking pin 19.
  • the latch holder 10 houses a latch 20 consisting of two flat locking lugs 21, 22, housed in the slot 16, these lugs being biased by a spring 23 so as to allow them to pivot around a pivot 24 and to be moved apart their upstream ends 25, 26, from one another.
  • the lock holder 10 also has two unlocking recesses 27.
  • a pin 28 connects the latch holder 10 to the remaining part of the inner tube 5.
  • An annular gap 29 is provided between the outer tube 2 and the inner tube 5 to supply water to the lower zone of the core barrel to cool the tool, during coring and to evacuate drilling debris.
  • a locking control device Downstream of the pin 28 is placed a locking control device designated as a whole by the reference notation 30.
  • This device 30 comprises a sleeve 31 and a piston 32 movable relative to a cylindrical envelope 33.
  • An o-ring 18 seals the piston 32 relative to the sleeve 31.
  • the casing 33 has a bottom 34, when the piston 32 is pushed to a lower position, for example when the hydraulic pressure due to the height of the column of drilling fluid to which is added the pressure of the drilling fluid pumps at the surface is greater than the force exerted by a powerful spring 35 on this piston 32, any circulation of the fluid between the outer tube 2 and the inner tube 5 is impossible.
  • the spring 35 must be dimensioned so as to be able to carry the column of liquid which overhangs it.
  • the power required to overcome the thrust exerted by the water column on the sleeve 31 and the piston 32 is indeed enormous.
  • the locking device according to the invention has the non-negligible advantage of allowing the spring 35 to exert the maximum thrust required, when it is fully compressed.
  • the sleeve 31 is subjected to the action of a spring 38 bearing on a disc 39 integral with the envelope cylindrical 33.
  • This spring 38 allows an annular edge 40 of the sleeve 31 to be applied to a seat 41 of the casing 33, when the sleeve 31 is not secured to the piston 32, so as to prevent the circulation of the liquid between the outer tube 2 and the inner tube 5.
  • the piston 32 When the hydraulic pressure applied to the piston 32 is sufficient to bring a cavity 42 of the piston in which is housed a ball 43 pushed back by a spring 44, opposite a hemispherical recess 45 of the sleeve 31, the ball 43 protrudes into this recess 45 so as to secure the sleeve 31 of the piston 32.
  • the piston 32 When the hydraulic pressure is then released, the piston 32 is pushed back at the same time as the sleeve 31, under the effect of the spring 35, towards a higher position so as to allow the circulation of the drilling liquid through the deflecting casing 33, between the outer tube 2 and the inner tube 5.
  • the casing 33 has at its ends holes 46 and 47 allowing the passage of the drilling liquid .
  • the drilling liquid can in fact pass through the holes 46 at the head of the casing 33 in the annular space 48 located between the sleeve 31 and the casing 33 and then through the holes 47 at the tail of the deflecting casing 33 in the gap 29 located between the outer tube 2 and the inner tube 5.
  • the piston 32 is advantageously provided with a coaxial rod 49 serving to guide and center the spring 35, as well as to limit the displacement of the piston 32 when the latter is subjected to a pressure greater than that necessary to bring the cavity 42 into face of the recess 45.
  • a solid shaft 51 is screwed onto the deflector casing 33 at the bottom of the corer.
  • the shaft 51 carries around it and from top to bottom, a first retaining ring 52, support washers 53, expansion rings 54 therebetween, a first ball bearing 61, a sleeve bracing 56, a ball bearing 57, a spring 58 and a second retaining ring 59.
  • the mechanical elements 53 to 58 surrounding the shaft 51 are clamped between the two retaining stops 52 and 59 by a self-locking nut 60, screwed onto the threaded lower end of the shaft 51.
  • the spacer sleeve 56 has a threaded part on which is screwed a support 61 of inner tube 5.
  • the tapped lower part of the support 55 carries a tube 5 serving to receive a carrot.
  • the ball 43 can be replaced by any other part of any shape and is advantageously subjected to a slight pressure, due for example to the force of a spring 63 bearing on the bottom of the cavity 42, so as to ensure permanent contact between the ball 43 and the lateral surface of the sleeve 31 when the latter is not yet secured to the piston 32.
  • the recess 45 of the sleeve 31 communicates by a conduit 64 with the outer surface of the sleeve 31.
  • the locking control device operates as follows:
  • An inner tube core drill cable 1 is introduced into a drill string constituting the outer tube 2.
  • the descent of the inner tube of the core 1 can be accelerated by injecting drilling liquid into said drill string.
  • the deflector casing 33 When the piston 32 is in the lower position, the deflector casing 33 is completely closed and the flow of drilling liquid becomes zero.
  • the sleeve is tightly applied to its seat in the deflecting casing and the drilling liquid can neither pass from the outside of the casing nor from the inside of the deflecting casing.
  • the drilling fluid pressure increases until the surface mounted safety valves on the drilling fluid pumps come into action and begin to release the drilling fluid.
  • the piston is pushed down as long as the pressure of the drilling fluid exceeds a predetermined value.
  • the longitudinal groove abuts against the pin 36.
  • the cavity 42 is located opposite the recess 45 and the sleeve 31 is secured to the piston, thanks to the ball 42 which, by the action of the spring 63, projects into the recess 45.
  • the locking device 30 is insensitive to a possible further increase in pressure. If the pressure of the drilling fluid increases again, this pressure will act on the two opposite faces of the sleeve 31 as well as on the two opposite faces of the piston 32. The piston 32 and the sleeve 31 remain insensitive to any further increase in pressure .
  • the inner tube of the corer When the coring is finished, the inner tube of the corer is raised to the surface of the well and the core is withdrawn from the receptacle tube 5.
  • the spring 35 is relaxed while the spring 38 is compressed.
  • the action of the spring 38 on the sleeve 31 allows the latter to slide down relative to the piston 32 and return to its uncoupled upper starting position and the action of the spring 37 on the sleeve 31 allows the latter to be applied to the seat 41 of the deflector casing 33 so preventing the circulation of any drilling liquid between the outer tube 2 and the inner tube 5 when the latter is suspended in the outer tube 2.
  • the finger 43 is disposed under the pin 36, so as to allow a more compact construction.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

Pour contrôler le verrouillage d'un carottier de sondage à câble (1), on utilise un dispositif de contrôle (30) comprenant une enveloppe déflectrice (33), un manchon (31) et un piston (32) mobiles par rapport à l'enveloppe déflectrice (33). Le piston (32) est susceptible d'être solidarisé dans une position inférieure, sous la poussée hydraulique, au manchon (31) par un doigt (43). Lorsque la pression hydraulique est libérée, le manchon (31) solidaire du piston (32) est amené dans une position supérieure qui permet la circulation d'un liquide de forage au travers de l'enveloppe déflectrice (33) vers une couronne de sondage (4).To control the locking of a cable drill corer (1), a control device (30) is used comprising a deflector casing (33), a sleeve (31) and a piston (32) movable with respect to the deflector casing (33). The piston (32) can be secured in a lower position, under hydraulic thrust, to the sleeve (31) by a finger (43). When the hydraulic pressure is released, the sleeve (31) integral with the piston (32) is brought into an upper position which allows the circulation of a drilling liquid through the deflector casing (33) towards a drilling ring ( 4).

Description

La présente invention est relative à un dispositif de contrôle du verrouillage d'un carottier de sondage à câble pour puits humide, ce carottier comprenant un tube extérieur dans lequel coulisse un tube intérieur constitué d'une tête d'accrochage et d'un corps cylindrique muni éventuellement d'un joint d'étanchéité hydraulique avec le tube extérieur et de moyens de verrouillage du tube intérieur par rapport au tube extérieur.The present invention relates to a device for controlling the locking of a cable sounder corer for a wet well, this corer comprising an outer tube in which slides an inner tube consisting of a hooking head and a cylindrical body optionally provided with a hydraulic seal with the outer tube and means for locking the inner tube relative to the outer tube.

On connaît par le brevet belge n° 900 733 un dispositf du type décrit dans le premier paragraphe du présent mémoire.Belgian device No. 900 733 discloses a device of the type described in the first paragraph of this specification.

Dans ce dispositif connu, un verrou éclipsable bistable assure l'étanchéité hydraulique du tube intérieur avec le tube extérieur, lorsque ce verrou est repoussé vers une position inférieure par une pression hydraulique au moyen d'une pompe d'injection du liquide de forage, c'est-à-dire lorsque ladite pression du liquide de forage dépasse une valeur prédéterminée. Par contre, le verrou permet la circulation du liquide de forage lorsque la pression est inférieure à ladite valeur, mais supérieure à la force de rappel nécessaire à l'ouverture d'une soupape de réglage du débit du liquide de forage.In this known device, a bistable retractable lock ensures the hydraulic sealing of the inner tube with the outer tube, when this lock is pushed to a lower position by hydraulic pressure by means of a pump for injecting the drilling liquid, c that is to say when said pressure of the drilling liquid exceeds a predetermined value. On the other hand, the lock allows the circulation of the drilling liquid when the pressure is less than said value, but greater than the return force necessary for the opening of a valve for adjusting the flow rate of the drilling liquid.

Ce dispositif, bien que perfectionné, présente l'inconvénient d'être techniquement complexe et de s'enrayer facilement en présence des boues de forage qui empêchent le verrou bistable d'effectuer un mouvement de rotation autour d'un axe vertical pour occuper les positions inférieure et supérieure prescrites. Ce dispositif ne permet pas non plus de remettre, par une opération simple, le dispositif de contrôle du verrouillage d'un carottier de sondage dans son état initial.This device, although improved, has the disadvantage of being technically complex and easily jammed in the presence of drilling mud which prevents the bistable lock from performing a rotational movement around a vertical axis to occupy the positions lower and upper prescribed. This device also does not make it possible to restore, by a simple operation, the device for controlling the locking of a drilling core barrel in its initial state.

Le dispositif suivant l'invention vise à remédier à ces inconvénients, tout en conservant les avantages du dispositif de contrôle de verrouillage connu, c'est-à-­dire un dispositif ne nécessitant pas de vérifier à partir de l'évolution de la pression d'eau à la pompe d'injection, si le verrouillage a effectivement eu lieu.The device according to the invention aims to remedy these drawbacks, while retaining the advantages of the known locking control device, that is to say a device which does not require checking from the evolution of the pressure d water to the injection pump, if the lockout has actually taken place.

Le dispositif suivant la présente invention du type décrit dans le premier paragraphe du présent mémoire, est caractérisé en ce qu'il comporte une enveloppe déflectrice, un manchon et un piston mobiles l'un par rapport à l'autre et par rapport au carottier, ainsi qu'un moyen associé au manchon ou au piston pour les solidariser l'un à l'autre lorsqu'une pression hydraulique supérieure à une valeur prédéterminée a amené le piston dans une position inférieure qui assure l'étanchéité hydraulique du tube intérieur avec le tube extérieur, de sorte que, lorsque la pression hydraulique est réduite à une valeur inférieure à la valeur prédéterminée, le manchon solidaire du piston est amené dans une position supérieure, telle qu'elle permet la circulation du liquide de forage entre le tube extérieur et le tube intérieur au travers de l'enveloppe déflectrice.The device according to the present invention of the type described in the first paragraph of this specification, is characterized in that it comprises a deflecting envelope, a sleeve and a piston movable relative to each other and relative to the core barrel, as well as a means associated with the sleeve or the piston for securing them to each other when a hydraulic pressure greater than a predetermined value has brought the piston into a lower position which ensures the hydraulic sealing of the inner tube with the outer tube, so that when the hydraulic pressure is reduced to a value lower than the predetermined value, the sleeve integral with the piston is brought into a higher position, such that it allows the circulation of the drilling fluid between the outer tube and the inner tube through the baffle.

Selon une particularité du dispositif selon l'invention, le piston est soumis au cours du forage à une pression hydraulique d'une part et à une contreforce d'autre part, de valeur prédéterminée qui s'oppose au déplacement du piston sous l'action de la pression hydraulique, de sorte que le piston ne peut être solidarisé au manchon que lorsque la pression hydraulique appliquée sur le piston est supérieure à cette valeur prédéterminée et le moyen pour solidariser le piston au manchon est constitué par au moins un doigt pouvant refaire saillie à la fois dans le manchon et dans le piston.According to a feature of the device according to the invention, the piston is subjected during drilling to a hydraulic pressure on the one hand and to a counterforce on the other hand, of predetermined value which opposes the displacement of the piston under the action of hydraulic pressure, so that the piston can only be fixed to the sleeve when the hydraulic pressure applied to the piston is greater than this predetermined value and the means for fixing the piston to the sleeve consists of at least one finger which can protrude again both in the sleeve and in the piston.

Dans une forme de réalisation, le piston présente une tête ayant une cavité dans laquelle le doigt destiné à solidariser le piston au manchon est au moins partiellement introduite et est, de préférence, soumise à l'action d'une force de manière à assurer un contacct permanent de cette pièce avec une surface du manchon lorsque le piston non encore solidaire du manchon est amené dans la position inférieure susdite par la pression hydraulique.In one embodiment, the piston has a head having a cavity in which the finger intended to secure the piston to the sleeve is at least partially inserted and is preferably subjected to the action of a force so as to ensure a permanent contact of this part with a surface of the sleeve when the piston not yet integral with the sleeve is brought into the aforementioned lower position by hydraulic pressure.

D'autres particularités et détails de l'invention apparaîtront au cours de la description détaillée suivante faisant référence aux dessins annexés qui illustrent, à titre d'exemple, une forme de réalisation de l'invention.Other features and details of the invention will become apparent during the following detailed description referring to the accompanying drawings which illustrate, by way of example, an embodiment of the invention.

Dans ces dessins :

  • - les figures 1 à 6 sont des vues en coupe transversale d'un carottier muni d'un dispositif de contrôle de verrouillage dans lequel le piston occupe successivement une position supérieure libre,une position inférieure de solidarisation et une position supérieure de libre passage au travers du déflecteur;
  • - les figures 7 à 9 représentent en coupe et en perspective le dispositif de contrôle de verrouillage des figures 1, 3 et 5;
  • - la figure 10 montre en coupe une seconde forme de réalisation d'un dispositif de contrôle de verrouillage selon l'invention équipant un carottier de type différent de celui montré aux figures 1 à 3.
In these drawings:
  • - Figures 1 to 6 are cross-sectional views of a core barrel provided with a locking control device in which the piston successively occupies a free upper position, a lower securing position and an upper free passage position through the deflector;
  • - Figures 7 to 9 show in section and in perspective the locking control device of Figures 1, 3 and 5;
  • FIG. 10 shows in section a second embodiment of a locking control device according to the invention fitted to a corer of a different type from that shown in FIGS. 1 to 3.

Dans ces figures, les mêmes notations de référence désignent des éléments identiques.In these figures, the same reference notations designate identical elements.

La figure 1 montre un carottier à câble désigné dans son ensemble par la notation de référence 1. Ce carottier 1 comprend un tube 2 muni à une extrémité 3 d'une couronne de sondage 4 et à l'autre extrémité d'un filet d'assemblage. Ce carottier 1 comprend également un tube intérieur 5 coaxial au tube 2 et équipé à son extrémité 6 adjacente à la couronne 4, d'un manchon extracteur de carotte 7.FIG. 1 shows a cable corer designated as a whole by the reference notation 1. This corer 1 comprises a tube 2 provided at one end 3 with a sounding ring 4 and at the other end with a thread of assembly. This core barrel 1 also comprises an inner tube 5 coaxial with the tube 2 and equipped at its end 6 adjacent to the crown 4, with a core extractor sleeve 7.

Le tube intérieur 5 est amené en position de carottage en le laissant coulisser le long du tube 2 en chute libre si le trou est humide ou à l'aide d'un inshot dans un trou sec. Dans ce dernier cas, l'inshot sert lui-même de contrôle de verrouillage.The inner tube 5 is brought into the coring position by letting it slide along the tube 2 in free fall if the hole is wet or using an inshot in a dry hole. In the latter case, the inshot itself serves as a locking control.

Dans sa position inférieure, le tube intérieur 5 est suspendu dans le tube extérieur 1 par un rebord annulaire 8 prenant appui sur une bague ou butée de suspension 9 solidaire du tube extérieur 2.In its lower position, the inner tube 5 is suspended in the outer tube 1 by an annular rim 8 bearing on a ring or suspension stop 9 secured to the outer tube 2.

Le carottier est muni à sa partie amont d'un porte-­verrou 10 et d'une tête d'accrochage 11 qui présente un crochet tronconique 12. La tête d'accrochage 11 est introduite dans une coulisse 14 du porte-verrou 10 et est reliée à ce dernier par une goupille 15. La coulisse 14 présente une fente diamétrale 16, ainsi que deux ouvertures allongées diamétralement opposées 17. La goupille de déverrouillage 15 peut coulisser par rapport au porte-verrou 10.The core barrel is provided at its upstream part with a latch holder 10 and a latching head 11 which has a frustoconical hook 12. The latching head 11 is introduced into a slide 14 of the latch holder 10 and is connected to the latter by a pin 15. The slide 14 has a diametrical slot 16, as well as two diametrically opposite elongated openings 17. The unlocking pin 15 can slide relative to the latch holder 10.

La coulisse de déverrouillage 14 porte une goupille de déverrouillage 19.The unlocking slide 14 carries an unlocking pin 19.

Le porte-verrou 10 abrite un verrou 20 constitué de deux pattes de verrouillage plates 21, 22, logées dans la fente 16, ces pattes étant sollicitées par un ressort 23 de manière à leur permettre de pivoter autour d'un pivot 24 et à écarter leurs extrémités amonts 25, 26, l'une de l'autre. Le porte-verrou 10 présente également deux évidements de déverrouillage 27.The latch holder 10 houses a latch 20 consisting of two flat locking lugs 21, 22, housed in the slot 16, these lugs being biased by a spring 23 so as to allow them to pivot around a pivot 24 and to be moved apart their upstream ends 25, 26, from one another. The lock holder 10 also has two unlocking recesses 27.

Une goupille 28 relie le porte-verrou 10 à la partie restante du tube intérieur 5.A pin 28 connects the latch holder 10 to the remaining part of the inner tube 5.

Un interstice annulaire 29 est prévu entre le tube extérieur 2 et le tube intérieur 5 pour alimenter en eau la zone inférieure du carottier pour refroidir l'outil , lors du carottage et évacuer les débris de forage.An annular gap 29 is provided between the outer tube 2 and the inner tube 5 to supply water to the lower zone of the core barrel to cool the tool, during coring and to evacuate drilling debris.

En aval de la goupille 28 est placé un dispositif de contrôle du verrouillage désigné dans son ensemble par la notation de référence 30.Downstream of the pin 28 is placed a locking control device designated as a whole by the reference notation 30.

Ce dispositif 30 comporte un manchon 31 et un piston 32 mobiles par rapport à une enveloppe cylindrique 33. Cette enveloppe prenant appui le long du rebord 8, sur la bague de suspension 9, joue le rôle d'un déflecteur. Un o-ring 18 assure l'étanchéité du piston 32 par rapport au manchon 31.This device 30 comprises a sleeve 31 and a piston 32 movable relative to a cylindrical envelope 33. This envelope bearing along the rim 8, on the suspension ring 9, plays the role of a deflector. An o-ring 18 seals the piston 32 relative to the sleeve 31.

L'enveloppe 33 présente un fond 34, lorsque le piston 32 est repoussé vers une position inférieure, par exemple lorsque la pression hydraulique due à la hauteur de la colonne de liquide de forage à laquelle s'ajoute la pression des pompes de liquide de forage en surface est supérieure à la force exercée par un puissant ressort 35 sur ce piston 32, toute circulation du fluide entre le tube extérieur 2 et le tube intérieur 5 est impossible.The casing 33 has a bottom 34, when the piston 32 is pushed to a lower position, for example when the hydraulic pressure due to the height of the column of drilling fluid to which is added the pressure of the drilling fluid pumps at the surface is greater than the force exerted by a powerful spring 35 on this piston 32, any circulation of the fluid between the outer tube 2 and the inner tube 5 is impossible.

Le ressort 35 doit être dimensionné de manière à pouvoir porter la colonne de liquide qui le surplombe. La puissance requise pour vaincre la poussée exercée par la colonne d'eau sur le manchon 31 et le piston 32 est en effet énorme.The spring 35 must be dimensioned so as to be able to carry the column of liquid which overhangs it. The power required to overcome the thrust exerted by the water column on the sleeve 31 and the piston 32 is indeed enormous.

Le dispositif de verrouillage selon l'invention jouit de l'avantage non négligeable de permettre au ressort 35 d'exercer la poussée maximale requise, au moment où il est totalement comprimé.The locking device according to the invention has the non-negligible advantage of allowing the spring 35 to exert the maximum thrust required, when it is fully compressed.

Les mouvements du piston 32 et du manchon 31 sont guidés grâce à une goupille 36 solidaire de l'enveloppe déflectrice 33, qui coulisse dans des trous allongés 37 ménagés dans le piston 32 et le manchon 31.The movements of the piston 32 and of the sleeve 31 are guided by a pin 36 secured to the deflector casing 33, which slides in elongated holes 37 made in the piston 32 and the sleeve 31.

Le manchon 31 est soumis à l'action d'un ressort 38 prenant appui sur un disque 39 solidaire de l'enveloppe cylindrique 33. Ce ressort 38 permet à un bord annulaire 40 du manchon 31 d'être appliqué sur un siège 41 de l'enveloppe 33, lorsque le manchon 31 n'est pas solidarisé du piston 32, de manière à empêcher la circulation du liquide de forage entre le tube extérieur 2 et le tube intérieur 5.The sleeve 31 is subjected to the action of a spring 38 bearing on a disc 39 integral with the envelope cylindrical 33. This spring 38 allows an annular edge 40 of the sleeve 31 to be applied to a seat 41 of the casing 33, when the sleeve 31 is not secured to the piston 32, so as to prevent the circulation of the liquid between the outer tube 2 and the inner tube 5.

Lorsque la pression hydraulique appliquée sur le piston 32 est suffisante pour amener une cavité 42 du piston dans laquelle est logée une bille 43 repoussée par un ressort 44, en face d'un évidement hémisphérique 45 du manchon 31, la bille 43 fait saillie dans cet évidement 45 de manière à solidariser le manchon 31 du piston 32. Lorsque la pression hydraulique est ensuite libérée, le piston 32 est repoussé en même temps que le manchon 31, sous l'effet du ressort 35, vers une position supérieure de manière à permettre la circulation du liquide de forage au travers de l'enveloppe déflectrice 33, entre le tube extérieur 2 et le tube intérieur 5. Dans ce but, l'enveloppe 33 comporte à ses extrémités des trous 46 et 47 permettant le passage du liquide de forage. Le liquide de forage peut en effet passer par les trous 46 en tête de l'enveloppe 33 dans l'espace annulaire 48 situé entre la manchon 31 et l'enveloppe 33 et ensuite par les trous 47 en queue de l'enveloppe déflectrice 33 dans l'interstice 29 située entre le tube extérieur 2 et le tube intérieur 5.When the hydraulic pressure applied to the piston 32 is sufficient to bring a cavity 42 of the piston in which is housed a ball 43 pushed back by a spring 44, opposite a hemispherical recess 45 of the sleeve 31, the ball 43 protrudes into this recess 45 so as to secure the sleeve 31 of the piston 32. When the hydraulic pressure is then released, the piston 32 is pushed back at the same time as the sleeve 31, under the effect of the spring 35, towards a higher position so as to allow the circulation of the drilling liquid through the deflecting casing 33, between the outer tube 2 and the inner tube 5. For this purpose, the casing 33 has at its ends holes 46 and 47 allowing the passage of the drilling liquid . The drilling liquid can in fact pass through the holes 46 at the head of the casing 33 in the annular space 48 located between the sleeve 31 and the casing 33 and then through the holes 47 at the tail of the deflecting casing 33 in the gap 29 located between the outer tube 2 and the inner tube 5.

Lorsque la pression hydraulique appliquée sur le piston 32 n'est pas suffisante pour amener la bille 43 en face de l'évidement 45, le manchon 31 n'est pas solidarisé au piston 32. Ainsi, lorsque la pression hydraulique est réduite, seul le piston 32 est repoussé vers une position supérieure, empêchant ainsi toute circulation du liquide de forage dans l'interstice annulaire 29 situé entre le tube extérieur 2 et le tube intérieur 5.When the hydraulic pressure applied to the piston 32 is not sufficient to bring the ball 43 in front of the recess 45, the sleeve 31 is not secured to the piston 32. Thus, when the hydraulic pressure is reduced, only the piston 32 is pushed to a higher position, preventing any circulation of the drilling fluid in the annular gap 29 located between the outer tube 2 and the inner tube 5.

Le piston 32 est avantageusement muni d'une tige coaxiale 49 servant à guider et à centrer le ressort 35, ainsi qu'à limiter le déplacement du piston 32 lorsque ce dernier est soumis à une pression supérieure à celle nécessaire pour amener la cavité 42 en face de l'évidement 45.The piston 32 is advantageously provided with a coaxial rod 49 serving to guide and center the spring 35, as well as to limit the displacement of the piston 32 when the latter is subjected to a pressure greater than that necessary to bring the cavity 42 into face of the recess 45.

Comme illustré aux figures 2, 4 et 6 et comme décrit dans le certificat d'utilité français No.7.720.085 publié sous le No.2.359.273, un arbre plein 51 est vissé sur l'enveloppe déflectrice 33 à la partie inférieure du carottier. L'arbre 51 porte autour de lui et de haut en bas, une première bague de retenue 52, des rondelles d'appui 53, des bagues d'expansion 54 entre celles-ci, une première butée à billes 61, un manchon d'entretoisement 56, un roulement à billes 57, un ressort 58 et une seconde bague de retenue 59. Les éléments mécaniques 53 à 58 entourant l'arbre 51 sont serrés entre les deux butées de retenue 52 et 59 par un écrou autobloquant 60, vissé sur l'extrémité inférieure filetée de l'arbre 51. D'autre part, le manchon d'entretoisement 56 présente une partie filetée sur laquelle est vissé un support 61 de tube intérieur 5. La partie inférieure taraudée du support 55 porte un tube 5 servant à recevoir une carotte. A la partie inférieur du tube réceptacle est vissé le manchon extracteur 7, qui est pourvu d'un ressort extracteur 62.As illustrated in Figures 2, 4 and 6 and as described in the French utility certificate No.7.720.085 published under No.2.359.273, a solid shaft 51 is screwed onto the deflector casing 33 at the bottom of the corer. The shaft 51 carries around it and from top to bottom, a first retaining ring 52, support washers 53, expansion rings 54 therebetween, a first ball bearing 61, a sleeve bracing 56, a ball bearing 57, a spring 58 and a second retaining ring 59. The mechanical elements 53 to 58 surrounding the shaft 51 are clamped between the two retaining stops 52 and 59 by a self-locking nut 60, screwed onto the threaded lower end of the shaft 51. On the other hand, the spacer sleeve 56 has a threaded part on which is screwed a support 61 of inner tube 5. The tapped lower part of the support 55 carries a tube 5 serving to receive a carrot. At the lower part of the receptacle tube is screwed the extractor sleeve 7, which is provided with an extractor spring 62.

La bille 43 peut être remplacée par toute autre pièce de forme quelconque et est avantageusement soumise à une légère pression, due par exemple à la force d'un ressort 63 prenant appui sur le fond de la cavité 42, de manière à assurer un contact permanent entre la bille 43 et la surface latérale du manchon 31 lorsque ce dernier n'est pas encore solidarisé du piston 32.The ball 43 can be replaced by any other part of any shape and is advantageously subjected to a slight pressure, due for example to the force of a spring 63 bearing on the bottom of the cavity 42, so as to ensure permanent contact between the ball 43 and the lateral surface of the sleeve 31 when the latter is not yet secured to the piston 32.

L'évidement 45 du manchon 31 communique par un conduit 64 avec la surface extérieure du manchon 31. Ainsi, lorsque le manchon 31 et le piston 32 sont solidaires l'un de l'autre et ne sont plus soumis à l'action d'une pression hydraulique, l'application d'une force, par le conduit 64, à l'aide d'une tige sur la bille 43 pour le déloger de l'évidement 45 permet, au piston 32 et au manchon 31, grâce à l'action de ressorts, de se séparer l'un de l'autre et d'occuper, en étant désolidarisés l'un de l'autre, leur position supérieure initiale.The recess 45 of the sleeve 31 communicates by a conduit 64 with the outer surface of the sleeve 31. Thus, when the sleeve 31 and the piston 32 are integral with one another and are no longer subjected to the action of hydraulic pressure, the application of a force, through the conduit 64, using a rod on the ball 43 to dislodge it from the recess 45 allows the piston 32 and the sleeve 31, thanks to the action of springs, to separate from one another and to occupy, while being separated from each other, their initial upper position.

Le dispositif de contrôle du verrouillage selon l'invention, fonctionne comme suit :The locking control device according to the invention operates as follows:

On introduit un tube intérieur de carottier de sondage à câble 1 dans un train de tiges de forage constituant le tube extérieur 2. La descente du tube intérieur du carottier 1 peut être accélérée par l'injection de liquide de forage dans ledit train de tiges.An inner tube core drill cable 1 is introduced into a drill string constituting the outer tube 2. The descent of the inner tube of the core 1 can be accelerated by injecting drilling liquid into said drill string.

Lorsque le tube intérieur du carottier est suspendu dans le tube extérieur 2, c'est-à-dire que le rebord annulaire 8 de l'enveloppe déflectrice prend appui sur la bague de suspension 9 du tube extérieur 2, le piston 32 est amené vers une position inférieure grâce à la pression hydraulique du liquide de forage agissant à l'encontre de l'action du puissant ressort 35. (Figures 1 et 4)When the inner tube of the core barrel is suspended in the outer tube 2, that is to say that the annular rim 8 of the deflecting casing bears on the suspension ring 9 of the outer tube 2, the piston 32 is brought towards a lower position thanks to the hydraulic pressure of the drilling liquid acting against the action of the powerful spring 35. (Figures 1 and 4)

Lorsque le piston 32 est en position inférieure, l'enveloppe déflectrice 33 est totalement obturée et le débit de liquide de forage devient nul. Le manchon est étanchement appliqué sur son siège ménagé dans l'enveloppe déflectrice et le liquide de forage ne peut ni passer du côté extérieur de l'enveloppe ni du côté intérieur de l'enveloppe déflectrice. La pression de liouide de forage croît jusqu'au moment où les soupapes de sécurité montées en surface sur les pompes de liquide de forage, entrent en action et se mettent à lâcher le liquide de forage.When the piston 32 is in the lower position, the deflector casing 33 is completely closed and the flow of drilling liquid becomes zero. The sleeve is tightly applied to its seat in the deflecting casing and the drilling liquid can neither pass from the outside of the casing nor from the inside of the deflecting casing. The drilling fluid pressure increases until the surface mounted safety valves on the drilling fluid pumps come into action and begin to release the drilling fluid.

Le piston est repoussé vers le bas aussi longtemps que la pression du liquide de forage dépasse une valeur prédéterminée. Dans la position inférieure extrême du piston, la rainure longitudinale est en butée contre la goupille 36. Dans cette position inférieure extrême du piston, la cavité 42 se trouve en face de l'évidement 45 et le manchon 31 se solidarise au piston, grâce à la bille 42 qui, par l'action du ressort 63, fait saillie dans l'évidement 45. Cette opération permet de s'assurer que le verrouillage du carottier a bien été réalisé.The piston is pushed down as long as the pressure of the drilling fluid exceeds a predetermined value. In the extreme lower position of the piston, the longitudinal groove abuts against the pin 36. In this extreme lower position of the piston, the cavity 42 is located opposite the recess 45 and the sleeve 31 is secured to the piston, thanks to the ball 42 which, by the action of the spring 63, projects into the recess 45. This operation makes it possible to ensure that the locking of the core barrel has indeed been carried out.

Ensuite, lorsque la pression hydraulique est libérée, le piston 32 quitte la position inférieure montrée à la figure 2 et soulève le manchon 31 (voir figure 3), ceci permet la circulation du liquide de forage par les trous amont de l'enveloppe déflectrice 33 dans l'espace 44 situé entre le manchon 31 et l'enveloppe 33 et par les trous aval 45 de l'enveloppe 33 dans l'espace 29 situé entre le tube extérieur 2 et le tube intérieur 5. L'opération de carottage peut alors avoir lieu.Then, when the hydraulic pressure is released, the piston 32 leaves the lower position shown in FIG. 2 and lifts the sleeve 31 (see FIG. 3), this allows the circulation of the drilling liquid through the holes upstream of the deflector casing 33 in the space 44 located between the sleeve 31 and the casing 33 and through the downstream holes 45 of the casing 33 in the space 29 located between the outer tube 2 and the inner tube 5. The coring operation can then take place.

Une fois que le manchon 31 a occupé la position supérieure, le dispositif de verrouillage 30 est insensible à une éventuelle nouvelle augmentation de pression. Si la pression du liquide de forage venait à augmenter à nouveau, cette pression agirait sur les deux faces opposées du manchon 31 ainsi que sur les deux faces opposées du piston 32. Le piston 32 et le manchon 31 restent insensibles à toute nouvelle augmentation de pression.Once the sleeve 31 has occupied the upper position, the locking device 30 is insensitive to a possible further increase in pressure. If the pressure of the drilling fluid increases again, this pressure will act on the two opposite faces of the sleeve 31 as well as on the two opposite faces of the piston 32. The piston 32 and the sleeve 31 remain insensitive to any further increase in pressure .

Lorsque le carottage est terminé, le tube intérieur du carottier est remonté à la surface du puits et la carotte est retirée du tube réceptacle 5. Le ressort 35 est détendu tandis que le ressort 38 est comprimé. Pour remettre le manchon 31 et le piston 32 dans leur position initiale, de manière à pouvoir réutiliser le carottier, il suffit à l'aide d'une tige non montrée, d'appliquer une force sur le doigt ou la bille 43 au travers du conduit 64, de manière à la repousser et la déloger de l'évidement 45 du manchon 31. En effet, lorsque la bille 43 est délogée de l'évidement 45, l'action du ressort 38 sur le manchon 31 permet à ce dernier de coulisser vers le bas par rapport au piston 32 et de reprendre sa position désolidarisée supérieure de départ et l'action du ressort 37 sur le manchon 31 permet à celui-ci d'être appliqué sur le siège 41 de l'enveloppe déflectrice 33 de manière à empêcher la circulation de tout liquide de forage entre le tube extérieur 2 et le tube intérieur 5 lorsque ce dernier est suspendu dans le tube extérieur 2.When the coring is finished, the inner tube of the corer is raised to the surface of the well and the core is withdrawn from the receptacle tube 5. The spring 35 is relaxed while the spring 38 is compressed. To return the sleeve 31 and the piston 32 to their initial position, so as to be able to reuse the core barrel, it is sufficient, using a rod not shown, to apply a force to the finger or the ball 43 through the conduit 64, so as to push it back and dislodge it from the recess 45 of the sleeve 31. Indeed, when the ball 43 is dislodged from the recess 45, the action of the spring 38 on the sleeve 31 allows the latter to slide down relative to the piston 32 and return to its uncoupled upper starting position and the action of the spring 37 on the sleeve 31 allows the latter to be applied to the seat 41 of the deflector casing 33 so preventing the circulation of any drilling liquid between the outer tube 2 and the inner tube 5 when the latter is suspended in the outer tube 2.

Dans une seconde forme de réalisation illustrée à la figure 7, le doigt 43 est disposé sous la goupille 36, de manière à permettre une construction plus compacte.In a second embodiment illustrated in Figure 7, the finger 43 is disposed under the pin 36, so as to allow a more compact construction.

Il est évident que bien des modifications sont possibles sans sortir du cadre de la présente invention. Ainsi, la forme du piston, du manchon et de l'enveloppe, le système de guidage des mouvements du piston par rapport au manchon, peuvent être différents.It is obvious that many modifications are possible without departing from the scope of the present invention. Thus, the shape of the piston, of the sleeve and of the casing, the system for guiding the movements of the piston relative to the sleeve, may be different.

Claims (12)

1. Dispositif de contrôle du verrouillage (30) d'un carottier de sondage à câble (1) pour puits humide, ce carottier comprenant un tube extérieur (2) dans lequel coulisse un tube intérieur (5) constitué d'une tête d'accrochage et d'un corps cylindrique muni éventuellement d'un joint d'étanchéité hydraulique avec le tube extérieur (2) et de moyens de verrouillage par rapport au tube extérieur (52), caractérisé en ce qu'il comporte une enveloppe déflectrice (33), un manchon (31) et un piston (32) mobiles par rapport au carottier (1), ainsi qu'un moyen associé au manchon (31) ou au piston (32) pour les solidariser l'un à l'autre lorsqu'une pression hydraulique supérieure à une valeur prédétermi­née a amené le piston (32) dans une position inférieure qui assure l'étanchéité hydraulique du tube intérieur (5) avec le tube extérieur (12) de sorte que, lorsque la pression hydraulique est réduite à une valeur inférieure à la valeur prédéterminée, le manchon (31) solidaire du piston (32) est amené dans une position supérieure, telle qu'elle permet la circulation d'un liquide de forage entre le tube extérieur (2) et le tube intérieur (5) au travers de l'enveloppe déflectrice (33).1. Locking control device (30) of a cable sounder core (1) for wet wells, this core core comprising an outer tube (2) in which slides an inner tube (5) consisting of a head attachment and a cylindrical body optionally provided with a hydraulic seal with the outer tube (2) and with locking means relative to the outer tube (52), characterized in that it comprises a deflecting envelope (33 ), a sleeve (31) and a piston (32) movable relative to the core barrel (1), as well as a means associated with the sleeve (31) or the piston (32) to secure them to each other when '' a hydraulic pressure higher than a predetermined value has brought the piston (32) in a lower position which ensures the hydraulic sealing of the inner tube (5) with the outer tube (12) so that, when the hydraulic pressure is reduced to a value lower than the predetermined value, the sleeve (31) integral with the piston (32) is cored born in a higher position, such that it allows the circulation of a drilling liquid between the outer tube (2) and the inner tube (5) through the deflector casing (33). 2. Dispositif suivant la revendication 1, caractérisé en ce que le piston (32) est soumis au cours du forage à une pression hydraulique d'une part et à une contreforce d'autre part, de valeur prédéterminée qui s'oppose au déplacement du piston sous l'action de la pression hydraulique, de sorte que le piston (32) ne peut être solidarisé au manchon (31) que lorsque la pression hydraulique appliquée sur le piston (32) est supérieure à cette valeur prédéterminée.2. Device according to claim 1, characterized in that the piston (32) is subjected during drilling to a hydraulic pressure on the one hand and a counterforce on the other hand, of predetermined value which opposes the movement of the piston under the action of hydraulic pressure, so that the piston (32) can only be joined to the sleeve (31) when the hydraulic pressure applied to the piston (32) is greater than this predetermined value. 3. Dispositif suivant l'une quelconque des revendications 1 et 2, caractérisé en ce que le moyen pour solidariser le piston (32) au manchon (31) est constitué par au moins un doigt (43) pouvant faire saillie à la fois dans le manchon (31) et dans le piston (32).3. Device according to any one of claims 1 and 2, characterized in that the means for securing the piston (32) to the sleeve (31) consists of at least one finger (43) which can project both into the sleeve (31) and in the piston (32). 4. Dispositif suivant la revendication 3, caractérisé en ce que le piston (32) présente une tête ayant une cavité (42) dans laquelle le doigt (43) pour solidariser le piston (32) au manchon (31) est au moins partiellement introduite.4. Device according to claim 3, characterized in that the piston (32) has a head having a cavity (42) in which the finger (43) for securing the piston (32) to the sleeve (31) is at least partially introduced . 5. Dispositif suivant la revendication 4, caractérisé en ce que le doigt (43) pour solidariser le piston (32) au manchon (31) est soumis à l'action d'une force de manière à assurer un contact permanent de ce doigt (43) avec une surface du manchon (31) lorsque le piston (32) non encore solidaire du manchon est amené dans la position inférieure susdite par la pression hydraulique.5. Device according to claim 4, characterized in that the finger (43) for securing the piston (32) to the sleeve (31) is subjected to the action of a force so as to ensure permanent contact of this finger ( 43) with a surface of the sleeve (31) when the piston (32) not yet integral with the sleeve is brought into the above-mentioned lower position by hydraulic pressure. 6. Dispositif suivant la revendication 5, caractérisé en ce que le doigt (43) est soumis à l'action d'un ressort (44) prenant appui sur le fond de la cavité (42).6. Device according to claim 5, characterized in that the finger (43) is subjected to the action of a spring (44) bearing on the bottom of the cavity (42). 7. Dispositif suivant l'une quelconque des revendications 3 à 6, caractérisé en ce que le doigt (43) fait saillie dans un évidement (45) du manchon (31).7. Device according to any one of claims 3 to 6, characterized in that the finger (43) protrudes into a recess (45) of the sleeve (31). 8. Dispositif suivant l'une quelconque des revendications 3 à 7, caractérisé en ce que le doigt (43) est une bille de forme sphérique.8. Device according to any one of claims 3 to 7, characterized in that the finger (43) is a ball of spherical shape. 9. Dispositif suivant la revendication 8, caractérisé en ce que l'évidement (45) du manchon (31) a une forme hémisphérique.9. Device according to claim 8, characterized in that the recess (45) of the sleeve (31) has a hemispherical shape. 10. Dispositif suivant la revendication 4, caractérisé en ce que la tête du piston (32) et le manchon (31) présentent au moins un trou allongé livrant passage à une goupille solidaire de l'enveloppe déflectrice, de manière à guider le piston et le manchon lors de leurs déplacements par rapport à l'enveloppe déflectrice.10. Device according to claim 4, characterized in that the piston head (32) and the sleeve (31) have at least one elongated hole providing passage to a pin secured to the deflector casing, so as to guide the piston and the sleeve during their movements relative to the deflecting envelope. 11. Dispositif suivant l'une quelconque des revendica­tions précédentes, caractérisé en ce qu'un ressort (38) sollicite en permanence le manchon (31) vers sa position inférieure dans laquelle il prend appui sur un bord annulaire (40).11. Device according to any one of the preceding claims, characterized in that a spring (38) permanently biases the sleeve (31) towards its lower position in which it bears on an annular edge (40). 12. Dispositif suivant la revendication 7, caractérisé en ce que l'évidement (45) du manchon (31) communique par un conduit (64) avec la surface extérieure du manchon (31), de manière à permettre de déloger le doigt (43) susdit de cet évidement (45) pour désolidariser le piston (32) du manchon (31).12. Device according to claim 7, characterized in that the recess (45) of the sleeve (31) communicates by a conduit (64) with the outer surface of the sleeve (31), so as to allow to dislodge the finger (43 ) above said recess (45) to separate the piston (32) from the sleeve (31).
EP88870037A 1987-05-13 1988-03-10 Device to control the bolting of a core drilling machine Expired - Lifetime EP0293355B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8700526 1987-05-13
BE8700526A BE1000529A4 (en) 1987-05-13 1987-05-13 Device control lock core survey.

Publications (2)

Publication Number Publication Date
EP0293355A1 true EP0293355A1 (en) 1988-11-30
EP0293355B1 EP0293355B1 (en) 1992-07-08

Family

ID=3882659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88870037A Expired - Lifetime EP0293355B1 (en) 1987-05-13 1988-03-10 Device to control the bolting of a core drilling machine

Country Status (6)

Country Link
US (1) US4832138A (en)
EP (1) EP0293355B1 (en)
AU (1) AU595443B2 (en)
BE (1) BE1000529A4 (en)
DE (1) DE3872600T2 (en)
ZA (1) ZA882124B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105909202A (en) * 2016-07-05 2016-08-31 中交第四航务工程勘察设计院有限公司 Coring drilling tool based on hydraulic clamping coring
CN106014314A (en) * 2016-07-05 2016-10-12 中交第四航务工程勘察设计院有限公司 Hydraulic rock core lifting device for exploratory boring

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1000529A4 (en) * 1987-05-13 1989-01-17 Diamant Boart Sa Device control lock core survey.
AU629609B2 (en) * 1989-02-22 1992-10-08 Longyear Tm Inc Wire line core drilling apparatus
US5267620A (en) * 1991-05-01 1993-12-07 Longyear Company Drilling latch apparatus
US6029758A (en) * 1997-11-24 2000-02-29 Boart Longyear International Holdings, Inc. Retractable core barrel valving apparatus
SE517258E (en) * 1999-08-24 2009-07-14 Atlas Copco Rocktech Ab Method of valve, valve, and device for link core drilling including such valve
US9359847B2 (en) 2007-03-03 2016-06-07 Longyear Tm, Inc. High productivity core drilling system
EP2132395B1 (en) * 2007-03-03 2019-02-20 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
US9528337B2 (en) 2009-10-07 2016-12-27 Longyear Tm, Inc. Up-hole bushing and core barrel head assembly comprising same
US8869918B2 (en) 2009-10-07 2014-10-28 Longyear Tm, Inc. Core drilling tools with external fluid pathways
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
CA2784195C (en) 2011-08-01 2014-08-05 Groupe Fordia Inc. Core barrel assembly including a valve
US20140353039A1 (en) * 2012-01-27 2014-12-04 Atlas Copco Canada Inc. Core barrel valve assembly
WO2013110159A1 (en) * 2012-01-27 2013-08-01 Atlas Copco Canada Inc. Core barrel head assembly
CN108301802B (en) * 2018-04-20 2024-01-19 河北省地矿局第七地质大队(河北省地质矿产勘查开发局雄安地质调查监测中心) Rope core drill assembly
CN108916393B (en) * 2018-08-13 2023-11-03 四川大学 Automatic triggering turning plate structure
CN109057736B (en) * 2018-08-13 2023-08-22 四川大学 core storage barrel
CN110863790B (en) * 2019-11-06 2022-03-01 大庆油田有限责任公司 For CO2Special adjusting reset head for mechanical adjustable injection allocation device of separate injection well
CN112945545B (en) * 2021-03-31 2023-12-29 四川大学 Magnetic closure experimental method for flap valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724568A (en) * 1967-12-06 1973-04-03 Mindrill Ltd Core drill latch
US4286663A (en) * 1978-07-27 1981-09-01 Societe Nationale Elf Aquitaine (Production) Hydraulic pumping rod connecting and disconnecting device
BE900733A (en) * 1984-10-02 1985-02-01 Diamant Boart Sa Control device for double fixed lock - has slide ring moving outside cylindrical body operated by hydraulic pressure

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491682A (en) * 1945-03-12 1949-12-20 Muhlbach Alfred Latch mechanism
US3266835A (en) * 1963-12-18 1966-08-16 Boyles Bros Drilling Company L Core barrel latch and by-pass assembly
US3340939A (en) * 1965-08-27 1967-09-12 Longyear E J Co Core lifter apparatus
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
DE2817194C2 (en) * 1977-05-03 1984-05-03 Diamant Boart S.A., Bruxelles Core drill
SE425420B (en) * 1980-10-10 1982-09-27 Craelius Ab DEVICE FOR NUCLEAR DRILLING INDICATING DOWN THE NUCLEAR PIPE
EP0052672B1 (en) * 1980-11-21 1985-03-20 DIAMANT BOART Société Anonyme Method for recovering a retrievable core receiver in upward drilling and a recovery head for this purpose
BE1000529A4 (en) * 1987-05-13 1989-01-17 Diamant Boart Sa Device control lock core survey.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724568A (en) * 1967-12-06 1973-04-03 Mindrill Ltd Core drill latch
US4286663A (en) * 1978-07-27 1981-09-01 Societe Nationale Elf Aquitaine (Production) Hydraulic pumping rod connecting and disconnecting device
BE900733A (en) * 1984-10-02 1985-02-01 Diamant Boart Sa Control device for double fixed lock - has slide ring moving outside cylindrical body operated by hydraulic pressure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105909202A (en) * 2016-07-05 2016-08-31 中交第四航务工程勘察设计院有限公司 Coring drilling tool based on hydraulic clamping coring
CN106014314A (en) * 2016-07-05 2016-10-12 中交第四航务工程勘察设计院有限公司 Hydraulic rock core lifting device for exploratory boring
CN106014314B (en) * 2016-07-05 2018-11-20 中交第四航务工程勘察设计院有限公司 A kind of drill takes device with hydraulic rock core card

Also Published As

Publication number Publication date
EP0293355B1 (en) 1992-07-08
ZA882124B (en) 1989-01-25
DE3872600T2 (en) 1992-12-03
US4832138A (en) 1989-05-23
AU1416188A (en) 1988-11-17
AU595443B2 (en) 1990-03-29
BE1000529A4 (en) 1989-01-17
DE3872600D1 (en) 1992-08-13

Similar Documents

Publication Publication Date Title
EP0293355B1 (en) Device to control the bolting of a core drilling machine
EP1766179A1 (en) Enlarging and stabilising tool for a borehole
FR2518046A1 (en) REMOTE CONTROL TOOL FOR EXECUTING FUNCTIONS UNDER WATER
WO2005103435A1 (en) Enlarging and stabilising tool for a borehole and method for the use thereof
FR2518204A1 (en) UNDERWATER DEVICES COMPRISING REMOTELY CONTROLLED BLOCKING MEANS
EP2003268B1 (en) Tie for supporting and attaching a structure to a wall, associated structure and corresponding structure assembly
EP0321610B1 (en) Oil well safety valve and setting and retrieving tools for such a valve
FR2512876A1 (en) DRILLING APPARATUS FOR DEEP DRILLINGS WHICH MAY ENLARGE THE BOTTOM OF THE DRILL
FR2615897A1 (en) LOCKING DEVICE FOR A TOOL IN A HYDROCARBON WELL
FR2497899A1 (en) CONNECTABLE CONNECTION DEVICE FOR GUIDE LINE
FR2605381A1 (en) SAFETY VALVE FOR OIL WELLS, ALLOWING ARTIFICIAL FLOW OPERATION
FR2609510A1 (en) MECHANICAL CONNECTOR
BE1004330A3 (en) Dual core drilling devie.
EP0854967B1 (en) Method and devices for making safe an oil well in the event of a defect in the hydraulic control line of its bottom safety valve
FR2458670A1 (en) TURBINE CARROT DEVICE WITH FOLLOWING TUBE
FR2512255A1 (en) DEVIABLE JUNCTION DEVICE AND USE OF THIS DEVICE FOR COMBUSTIBLE ASSEMBLY FOR NUCLEAR REACTOR
EP0238767A1 (en) Assembly of a removable and lockable guide ring with a plate and its application to a guide tube of a nuclear reactor
EP0232268B1 (en) Device for controlling the locking of a sampling tube
EP0588373A1 (en) Double-tube core taking apparatus for inclined drilling
EP0287548B1 (en) Apparatus for shutting off a core-barrel mounted on a drill string
EP2565353A1 (en) Locking and unlocking device using a key of a buffer on a frame with integral cap for closing an opening of the buffer for inserting the key
EP1267110B1 (en) Actuating device for a buried tap
FR2716484A1 (en) Burglary detector and preventer for security lock
FR3075847A1 (en) LOCK AND TRAPPER COMPRISING SUCH A LATCH
FR2724687A1 (en) Manhole cover security lock, esp. for potable water pipeline networks

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

Kind code of ref document: A1

Designated state(s): DE GB

17P Request for examination filed

Effective date: 19890513

17Q First examination report despatched

Effective date: 19900813

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3872600

Country of ref document: DE

Date of ref document: 19920813

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

Ref country code: GB

Effective date: 19930310

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

Effective date: 19930310

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

Ref country code: DE

Effective date: 19931201