EP0052672B1 - Verfahren zum Herausziehen eines im Bohrloch auswechselbaren Bohrkernbehälters und ein hierfür vorgesehener Fangkopf - Google Patents

Verfahren zum Herausziehen eines im Bohrloch auswechselbaren Bohrkernbehälters und ein hierfür vorgesehener Fangkopf Download PDF

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Publication number
EP0052672B1
EP0052672B1 EP80201101A EP80201101A EP0052672B1 EP 0052672 B1 EP0052672 B1 EP 0052672B1 EP 80201101 A EP80201101 A EP 80201101A EP 80201101 A EP80201101 A EP 80201101A EP 0052672 B1 EP0052672 B1 EP 0052672B1
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EP
European Patent Office
Prior art keywords
drilling
outer tube
tube
inner tube
recovery head
Prior art date
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Expired
Application number
EP80201101A
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English (en)
French (fr)
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EP0052672A1 (de
Inventor
Honoré Joseph Lambot
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Diamant Boart NV SA
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Diamant Boart NV SA
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Publication date
Application filed by Diamant Boart NV SA filed Critical Diamant Boart NV SA
Priority to AT80201101T priority Critical patent/ATE12288T1/de
Priority to DE8080201101T priority patent/DE3070343D1/de
Priority to EP80201101A priority patent/EP0052672B1/de
Priority to US06/322,130 priority patent/US4418770A/en
Priority to ZA818048A priority patent/ZA818048B/xx
Publication of EP0052672A1 publication Critical patent/EP0052672A1/de
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Publication of EP0052672B1 publication Critical patent/EP0052672B1/de
Expired legal-status Critical Current

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    • 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
    • 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
    • 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 method for recovering an inner tube of a double-tube corer used in the presence of a drilling liquid, as well as a recovery device provided for this purpose.
  • the method according to the invention as it is known from US-A-3340939 allows recovery by drilling up an inner tube of a core barrel device comprising said inner tube which can slide in an outer tube.
  • the inner tube is composed of a train of hollow rods fitted at one end with a carrot extractor sleeve and at the other end with a head.
  • the outer tube is formed by a train of hollow rods which drives in rotation a drill bit.
  • the head of the inner tube has a suspension stop and blocking means engaged, in the probing position, in an annular notch for blocking this outer tube, and at least one seal which can form a sealing piston in the outer tube.
  • the inner tube forming from top to bottom in the outer tube a passage for the circulation of the drilling liquid towards the drill bit.
  • the device according to the invention is specifically adapted to this new method of recovering an inner tube of the corer apparatus in rising drilling, while also being applicable to the recovery of this same inner tube of corer apparatus in approximately horizontal drilling and in downhole drilling.
  • Double tube devices are currently very widely used in drilling of all kinds, whether it is a downhole drilling for mining, petroleum or geothermal exploration, or a horizontal drilling or rising in drilling work in underground operation.
  • a known corer has two coaxial tubes, the inner tube of which is lockable in the outer tube and can be unlocked and brought to the surface through the outer tube by means of a cable, a fishing piece called “ overshot "and an auxiliary winch, while the outer tube carrying the drill bit remains in the drilled hole.
  • the inner tube of the core drilling device can only be recovered, in the case of a rising borehole, by fairly delicate operations.
  • it is first necessary to completely evacuate the column of liquid contained in the outer tube and detach the pump from the outer tube, in order to be able to introduce the recovery piece or overshot into the outer tube.
  • It is then necessary to reconnect the pump to the above-mentioned outer tube and bring the draft part by hydraulic thrust towards the inner tube of the core barrel device.
  • This fishing piece is automatically hooked to a head of the inner tube of the corer.
  • the external tube must be drained a second time and the pump disconnected, in order to be able to pull on the cable and unlock the internal tube of the corer.
  • the second drawback of known techniques is the presence of a cable in the majority of the devices currently used for recovering upstream drilling of the inner tube of the coring apparatus of the type under consideration.
  • the subject of the invention is a method of recovering an inner tube of a coring apparatus, in rising drilling, which avoids the drawbacks of the known techniques described above and which can be used in any geological condition. It relates to a method for recovering an inner tube from a double-barrel core barrel device, used in the presence of a drilling liquid, and the core barrel device comprising, in an outer tube formed by a train of hollow rods and provided with one end of a drill bit, said inner tube fitted at the end corresponding to the aforementioned end with a carrot extractor sleeve and, at its other end, with a recovery head and which is provided with means for blocking engaged in the drilling position, in an annular notch for blocking this outer tube, and at least one seal capable of forming a sealing piston in the outer tube, the inner tube forming a passage from top to bottom in the outer tube for the circulation of drilling liquid towards the drilling crown, essentially characterized in that, in rising drilling, the suction force created by the release of a column of drilling liquid at the end in
  • the recovery head used is suitably connected to the device for unlocking the inner tube of the core barrel device by means of a hooking means which can be slid between a higher position. leaving, during the drilling operation, a passage for the circulation of the drilling liquid towards the drill bit, and a lower position for recovering the inner tube forming a sealing piston in the outer tube.
  • a particularly advantageous property of the method according to the invention also lies in the possibility of using the recovery head itself for sending the inner tube by hydraulic pressure to the end of the outer tube carrying the drill bit.
  • the invention also relates also to a device implementing the method of recovering, in rising drilling, an inner tube of a double tube corer, known from US-A-3340939 and described below.
  • this device comprising in an inner tube formed by a train of hollow rods and provided at one end with a drilling crown, an inner tube equipped at the end corresponding to the said end of a carrot extractor sleeve and, at its other end, of a recovery head which is provided with locking means engaged in the drilling position in an annular notch for blocking this outer tube, of at least one hydraulic sealing means (6) between the recovery head and the outer tube.
  • this recovery device being essentially characterized in that it comprises means for hooking to an unlocking device of the inner tube of the core barrel device, said attachment means and said hydraulic sealing means collaborating with each other and possibly with means forming part of the outer tube to allow, during an upward drilling, the circulation of drilling liquid towards the drill bit and to ensure the hydraulic sealing of said recovery head with respect to the outer tube, when the injection of drilling liquid is interrupted.
  • the recovery head comprises a cylindrical body which can slide in the outer tube, a means for hooking this cylindrical body to the unlocking device, allowing the cylindrical body to slide between two extreme positions relative to the unlocking device, as well as at least one peripheral seal mounted on said cylindrical body allowing the recovery head to form a sealing piston in the bore of the outer tube, so that, during an upward borehole, the recovery head first occupies an upper position in which the aforementioned joint or joints of the recovery head is or are held opposite a peripheral recess of the outer tube, in order to allow the circulation of the liquid of drilling towards the drill bit, during the drilling operation and then moves to a second lower position in which said head e forms a piston in the outer tube when the injection of drilling fluid is interrupted.
  • the recovery head of the coring apparatus comprises a cylindrical body provided with at least one peripheral seal and a hooking means which can slide relative to the unlocking device and traversed by a communication bore between the ends of the cylindrical body situated on either side of the peripheral joint (s), another seal which can slide, capable of closing the part of the communication bore situated on the side opposite to the sliding attachment means, a base tube provided with one or more openings for communication between its internal cavity and the exterior, adapted to be fixed to the cylindrical body on the opposite side to the sliding attachment while maintaining said position another sliding joint, the base tube extending axially around an axial rod passing through the base and provided at its end situated inside the base tube, with a sealing part capable of closing off the bore and, at its end situated outside the base tube, of a sectional hook, a helical spring being housed around the axial rod and bearing against the base and against said part sealing.
  • Such a recovery head has the considerable advantage of being able to be used interchangeably with said other sliding joint for the recovery of the core drilling rig in rising drilling, without overshot or cable, and without said other sliding joint for recovery of the Coring machine in a conventional manner with a fishing piece and cable, in approximately horizontal drilling or in downhole drilling.
  • each of the peripheral seals is mounted on the cylindrical body upstream of the unlocking device and consists of a removable ring surrounding said cylindrical body, the base tube being tapped so as to be aimed at the cylindrical body while maintaining in place the ring against a peripheral stop of the cylindrical body, while the axial rod carrying the aforementioned sealing part is provided with a stop cooperating with the base so as to be able to tighten said other sliding seal against the communication bore when the base tube is aimed at the cylindrical body.
  • the sliding seal is tightened 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 device for recovering the inner tube of a core barrel device according to the invention.
  • the coring apparatus used in rising drilling consists essentially of an inner tube 2, slidable inside an outer tube 1 and provided with a recovery head 3 according to a first embodiment of the invention .
  • the assembly of the inner tube 2 of the corer and the recovery head 3 are locked ( Figures 1 and 2) in the outer tube 1, by means of a locking device 4, hooking in a circumferential groove 31 of the outer tube, 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 tabs 32 of the lock 33 from the locking groove 31.
  • the recovery head 3 is connected to this slide 36 by means of a hooking means 8, formed by a pin 40 fixed to the slide 36 and inserted into an elongated recess 41 in the end of the recovery head 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 with respect to the bore of the outer tube 1; the recovery head 3 can also be provided with a sectional hook 23, allowing for example the attachment of a recovery piece with cable, if necessary.
  • the device for recovering the inner tube of the corer apparatus according to the invention is used as follows.
  • the recovery head 3 is maintained in this upper position as a result of the hydraulic pressure exerted by the drilling liquid sent, under pressure, to the drilling ring.
  • 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 recovery head 3 moves by gravity to a lower position, shown in FIG. 2, so that the peripheral seals 6 come into sealing contact with the bore of the outer tube 1, and the rear of the elongated recess 41 bears on the pin 40 of the slide 36.
  • 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 tube 2; this inner tube 2 thus begins a descent into the outer tube 1 (see Figure 3), due to its own weight and the vacuum exerted by the column of drilling fluid.
  • the assembly descends at the same time as the liquid column.
  • the rate of descent of the liquid column is controlled by adjusting the flow rate of the relief valve. This setting allows the carrots to be brought back gently, avoiding shocks that could affect their quality.
  • Figures 4 and 5 illustrate a second embodiment of the device for recovering core samplers according to the invention, in rising drilling.
  • the operation of the device is entirely similar to that described above with reference to FIGS. 1 to 3.
  • the recovery device which is implemented there is however different in that it is a device which can be used both for the recovery of the core barrel device without overshot or cable in rising drilling as for the recovery of the core barrel device in 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 tapping 26, wedging a ring 25 provided with peripheral seals 6.
  • the cylindrical body 10 is connected to the unlocking slide 36 by a hooking means 8 and is crossed 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 by means of a sliding seal 14.
  • This sliding seal 14 is held in place in the cavity 19 of the tube 16 with base 17 by an axial rod 20 which extends through this tube 16 with base 17, which bears at its end 22 against this sliding seal 14 and which bears on the other side against the base 17 by a stop 28 of this axial rod 20.
  • the device consequently 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 is cut off on the drilling fluid, the device descends to the lower position in which the peripheral seals 6 come into sealing contact with the bore of the outer tube ( Figure 5).
  • Figures 6 and 7 illustrate the use of the device according to the invention for the recovery of an inner tube of the coring apparatus in a conventional manner with overshot 30 and cable 29, in downhole drilling.
  • the device according to the invention is used without the sliding closure joint 14 for the communication bore 11 in the cylindrical body 10.
  • the inner tube 2 of the core sampler is locked in the outer tube by the locking device 4.
  • the recovery head 3 drives the sliding hooking means 8 in the lower position relative to the unlocking device 7, due to the hydraulic pressure of the liquid drilling and by the self-weight of the recovery head.
  • the drilling liquid can therefore circulate towards the drill bit through the peripheral recess 5 in the bore of the outer tube.
  • an overshot 29 is lowered into the outer tube 1, using a cable 30.
  • an attachment clip 50 of the overshot grips on the sectional hook 23 of the recovery head.
  • the clamp 50 When the cable 30 is then pulled, the clamp 50 will drive the axial rod 20 against the spring 24. The rod 20 will then 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 27 and the bore 11 in the cylindrical body 10, during the ascent of the inner tube 1.

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  • 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)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Claims (9)

1. Verfahren zum Bergen eines Innenrohres (2) eines Kernbohrgerätes mit Doppelrohr (1, 2) und Bohrspülung, beim Aufwärtsbohren, welches Kernbohrgerät das genannte Innenrohr (2) in einem von einem hohlen Bohrgestänge gebildeten und an einem Ende mit einer Bohrkrone versehenen Außenrohr (1) enthält, wobei das genannte Innenrohr (2) an dem dem obengenannten Ende entsprechenden Ende mit einer Kern-Ausziehmuffe und an seinem anderen Ende mit einem Fangkopf (3) ausgestattet ist, der mit in der Bohrstellung in eine ringförmige Rastvertiefung dieses Außenrohres eingriefenden Verriegelungsmitteln (4) und mit mindestens einer Dichtung (6) versehen ist, die einen Dichtkolben in dem Außenrohr bilden kann, sodaß das Innenrohr (2) durch hydraulischen Druck gegen das die Bohrkrone tragende Ende des Aussenrohres (1) vorgeschoben werden kann, wobei das Innenrohr (2) von oben bis unten in dem Außenrohr einen Durchlaß für die Zirkulation der Bohrflüssigkeit zur Bohrkrone bildet, dadurch gekennzeichnet, daß man beim Aufwärtsbohren die durch die Freigabe einer Bohrflüssigkeitssäule am unteren Ende des Außenrohres erzeugte und auf den in bezug auf das Innenrohr (2) des Kernbohrgerätes beweglichen Fangkopf (3) ausgeübte Saugkraft zur Entriegelung der Verriegelungsmittel (4) des Innenrohres (2) in der ringförmigen Rastvertiefung des Außenrohres (1) und zur Bergung des Innenrohres (2) des Kernbohrgerätes durch die Schwerkraft gleichzeitig mit dem Abführen der Flüssigkeitssäule verwendet, und daß man während des Bohrens in Höhe des Fangkopfes (3) eine Aussparung (5) für die Zirkulation der Bohrflüssigkeit gegen die Bohrkrone vorsieht, während man bei der Unterbrechung der Einspritzung der genannten Bohrflüssigkeit diese Aussparung durch Verschiebung des Fangkopfes (3) infolge der Schwerkraft bis in eine Stellung, in der er einen Dichtkolben in dem Außenrohr (1) bildet, verschließt.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man den genannten Fangkopf (3) mit mindestens einer Umfangsdichtung (6) versieht, die während des Bohrbetriebes durch den hydraulischen druck der Bohrflüssigkeit gegenüber jedes in der Bohrung des Außenrohres (1) vorgesehenen Umfangsaussparung (5) gehalten wird, um die Zirkulation der Bohrflüssigkeit zur Bohrkrone zu erlauben, daß man die Einspritzung der Bohrflüssigkeit derart unterbricht, daß der obengenannte Fangkopf (3) in dichtenden Kontakt mit der Bohrung des Außenrohres (1) kommt, und daß man durch die Freigabe der Flüssigkeitssäule auf den Fangkopf (3) einen Unterdruck wirken läßt, durch den die Verriegelungsmittel (4) des Kernbohrgerätes entriegelbar sind.
3. Verfahren nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß man den Fangkopf (3) mit der Entriegelungseinrichtung (7) des Innenrohres (2) des Kernbohrgerätes mit Hilfe eines Aufhängemittels (8) verbindet, das zwischen einer oberen Stellung, in der während des Bohrbetriebes ein Durchtritt für die Zirkulation der Bohrflüssigkeit zur Bohrkrone freigelassen ist, und einer unteren Stellung zum Bergen des Innenrohres (2) verschiebbar ist, in der ein Dichtkolben in dem Außenrohr (1) gebildet wird.
4. Vorrichtung zur Durchführung des Verfahrens zum Bergen eines Innenrohres (2) einer Kernbohrmaschine mit Doppelrohr und Bohrspülung, nach irgendeinem der vorhergehenden Ansprüche, welche Vorrichtung das genannte Innenrohr (2) in einem von einem hohlen Bohrgestänge gebildeten und an einem Ende mit einer Bohrkrone versehenen Außenrohr (1) enthält, wobei das genannte Innenrohr (2) an einem dem obengenannten Ende entsprechenden Ende mit einer Kern-Ausziehmuffe und an seinem anderen Ende mit einem Fangkopf (3) ausgestattet ist, der mit in der Bohrstellung in eine ringförmige Rastvertiefung dieses Außenrohres (1) eingreifenden Verriegelungsmitteln (4) und mit mindestens einem Mittel (6) für die hydraulische Abdichtung zwischen dem Fangkopf (3) und dem Außenrohr (1) versehen ist, wobei das Innenrohr von oben bis unten in dem Außenrohr einem Wasserdurchlaß für die Zirkulation der Bohrflüssigkeit zur Bohrkrone bildet, dadurch gekennzeichnet, daß sie Mittel (8) zum Aufhängen an eine Einrichtung zum Entriegeln des Innenrohres (2) des Kernbohrgerätes besitzt, wobei die Aufhängemittel (8) und as genannte Mittel (6) zur hydraulischen Abdichtung untereinander und eventuell mit einem Teil des Außenrohres (1) bildenden Mitteln (5) zusammenwirken, um während eines Aufwärtsbohrens die Zirkulation der Bohrflüssigkeit zur Bohrkrone zu erlauben und die hydraulische Abdichtung des genannten Fangkopfes (3) in bezug auf das Außenrohr (1) zu gewährleisten, wenn die Einspritzung von Bohrflüssigkeit unterbrochen wird.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der Fangkopf (3) einen in dem Außenrohr (1) verschiebbaren zylindrischen Körper (10), ein Mittel (8) zum Aufhängen dieses zylindrischen Körpers (10) an die Entriegelungseinrichtung (7), welches die Verschiebung des genannten zylindrischen Körpers (10) in bezug auf die Entriegelungseinrichtung (7) zwischen zwei Endstellungen erlaubt, und mindestens eine das Abdichtmittel bildende Umfangsdichtung (6) aufweist, die auf dem genannten zylindrischen Körper (10) montiert ist und dem Fangkopf (3) erlaubt, in der Bohrung des Außenrohres (1) einen Dichtkolben zu bilden, derart, daß während eines Aufwärtsbohrens der Fangkopf (3) zunächst eine obere Stellung einnimmt, in der die genannte(n) Dichtung(en) (6) des Fangkopfes (3) gegenüber einer Umfangsaussparung (5) des Außenrohres gehalten wird (werden), um während des Bohrbetriebes die Zirkulation von Bohrflüssigkeit zur Bohrkrone zu erlauben, und sich danach, wenn die Einspritzung von Bohrflüssigkeit unterbrochen wird, in eine untere Stellung verschiebt, in der der Fangkopf (3) einen Dichtkolben in dem Außenrohr (1) bildet.
6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß der Fangkopf (3) enthält:
- einen zylindrischen Körper (10), der mit mindestens einer Umfangsdichtung (6) und mit einem Aufhängemittel (8) ausgestattet ist und in bezug auf die Einrichtung (7) zum Entriegeln des Innenrohres des Kernbohrgerätes verschiebbar ist und von einer Verbindungsbohrung (11) zwischen den zu beiden Seiten der Umfangsdichtungen (6) liegenden Enden (12, 13) des genannten zylindrischen Körpers durchsetzt ist;
- eine weitere verschiebbare Dichtung (14), durch die der auf der entgegengesetzten Seite des verschiebbaren Aufhängemittels (8) liegende Teil (15) der genannten Verbindungsbohrung verschließbar ist;
- ein Rohr (16) mit Stizfläche (17), das mit einer oder mehreren Verbindungsöffnungen (18) zwischen seinem Innenraum (19) und der Außenseite versehen ist, auf dem zylindrischen Körper (10) auf der dem verschiebbaren Aufhängemittel (8) entgegengesetzten Seite (13) befestigbar ist une die genannte weitere verschiebbare Dichtung (14) in Stellung hält, wobei das genannte Rohr (16) mit Sitzfläche (17) sich axial um einen axialen Schaft (20) herumerstreckt, der die genannte Sitzfläche (17) durchsetzt und an seinem im Inneren des Rohres mit Sitzfläche liegenden Ende mit einem Dichtstück (22) durch das die genannte Bohrung (11, 15) verschließbar ist, und an seinem außerhalb des genannten Rohres (16) mit Sitzfläche (17) liegenden Ende mit einem kegelstumpfförmigen Haken (23) versehen ist, wobei um den genannten axialen Schaft (20) herum eine zylindrische Schraubenfeder (24) angeordnet ist, die sich gegen die genannte Sitzfläche (17) und gegen das Dichtstück (22) abstütz.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß:
- jede der Umfangsdichtungen (6) von einem Ring (25) gebildet oder getragen wird, der auf dem zylindrischen Körper (10) stromauf der Entriegelungseinrichtung montiert ist,
- das genannte Rohr (16) mit Sitzfläche (17) mit einem solchen Gewinde (26) versehen ist, daß es aus den genannten zylindrischen Körper (10) aufschraubbar ist und den gennannten Ring (25) gegen einen peripheren Anschlag (27) des genannten zylindrischen Körpers hält; und
- der genannte, das Dichtstück (22) tragende axiale Schaft (20) mit einem Anschlag (28) versehen ist, der mit der Sitzfläche (17) derart zusammenwirk, daß er die genannte weitere verschiebbace Dichtung (14) gegen die genannte Verbindungsbohrung (11, 15) preßt, wenn das genannte Rohr (16) mit Sitzfläche (17) auf den zylindrischen Körper (10) aufgeschraubt ist.
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die verschiebbare Dichtung (14) beim Aufschrauben das genannten Rohres (16) mit Sitzfläche (17) auf den genannten zylindrischen Körper (10) in die die genannte Bohrung (11) verschließende Stellung gepreßt wird.
9. Verfahren zur Verwendung der Vorrichtung nach den Ansprüchen 6 bis 8 zum Bergen des Innenrohres des Kernbohrgerätes mittels Fangstück (29) und Seil (30) beim angenähert horizontalen Bohren oder beim Abwärtsbohren, dadurch gekennzeichnet, daß das Fangstück (29) und das Seil (30) an dem kegelstumpfförmigen Haken (23) des Fangkopfes (3) angehängt werden und daß die zwischen dem Dichtstück (22) und dem Ende (13) des zylindrischen Körpers (10) verschiebbare Dichtung (14) zurückgezogen wird, um beim Einziehen des Innenrohres (2) Abfluß der Bohrflüssigkeit durch die Öffnungen (18) in dem Rohr (16) mit Sitzfläche (17) und die Bohrung (11) in dem zylindrischen Körper (10) zu erlauben.
EP80201101A 1980-11-21 1980-11-21 Verfahren zum Herausziehen eines im Bohrloch auswechselbaren Bohrkernbehälters und ein hierfür vorgesehener Fangkopf Expired EP0052672B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT80201101T ATE12288T1 (de) 1980-11-21 1980-11-21 Verfahren zum herausziehen eines im bohrloch auswechselbaren bohrkernbehaelters und ein hierfuer vorgesehener fangkopf.
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
EP80201101A EP0052672B1 (de) 1980-11-21 1980-11-21 Verfahren zum Herausziehen eines im Bohrloch auswechselbaren Bohrkernbehälters und ein hierfür vorgesehener Fangkopf
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 (de) 1980-11-21 1980-11-21 Verfahren zum Herausziehen eines im Bohrloch auswechselbaren Bohrkernbehälters und ein hierfür vorgesehener Fangkopf

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EP0052672A1 EP0052672A1 (de) 1982-06-02
EP0052672B1 true EP0052672B1 (de) 1985-03-20

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EP80201101A Expired EP0052672B1 (de) 1980-11-21 1980-11-21 Verfahren zum Herausziehen eines im Bohrloch auswechselbaren Bohrkernbehälters und ein hierfür vorgesehener Fangkopf

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US (1) US4418770A (de)
EP (1) EP0052672B1 (de)
AT (1) ATE12288T1 (de)
DE (1) DE3070343D1 (de)
ZA (1) ZA818048B (de)

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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 (fr) * 1987-05-13 1989-01-17 Diamant Boart Sa Dispositif de controle du verrouillage d'un carottier de sondage.
US5267620A (en) * 1991-05-01 1993-12-07 Longyear Company Drilling latch apparatus
NO305845B1 (no) * 1997-12-09 1999-08-02 Kongsberg Offshore As Forankringsmekanisme for en f°ringsstolpe
US9359847B2 (en) 2007-03-03 2016-06-07 Longyear Tm, Inc. High productivity core drilling system
TR201902936T4 (tr) * 2007-03-03 2019-03-21 Longyear Tm Inc Yüksek verimli karotlu sondaj sistemi.
US7967085B2 (en) * 2008-04-22 2011-06-28 Longyear Tm, Inc. Braking devices for use in drilling operations
CA2752894C (en) * 2009-02-25 2017-01-24 2Ic Australia Pty Ltd. Head assembly
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
US8794355B2 (en) * 2009-10-07 2014-08-05 Longyear Tm, Inc. Driven latch mechanism
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 (de) * 2012-06-13 2013-12-19 Areva Gmbh Greifer
CN105156057B (zh) * 2015-07-01 2017-08-08 吉林大学 一种带有到位报信的绳索取心定位悬挂机构
CN105089530B (zh) * 2015-08-12 2017-11-14 新疆华隆油田科技股份有限公司 可洗井防返吐控制阀装置
CN112377131B (zh) * 2020-10-29 2022-09-06 中煤科工集团西安研究院有限公司 一种近水平定向连续取芯装置与方法

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US2857138A (en) * 1954-07-02 1958-10-21 Longyear E J Co Core barrel
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 (fr) * 1976-07-20 1978-02-17 Diamant Boart Sa Appareil carottier du type a cable
DE2817194C2 (de) * 1977-05-03 1984-05-03 Diamant Boart S.A., Bruxelles Kernbohrgerät

Also Published As

Publication number Publication date
EP0052672A1 (de) 1982-06-02
ZA818048B (en) 1982-11-24
US4418770A (en) 1983-12-06
DE3070343D1 (en) 1985-04-25
ATE12288T1 (de) 1985-04-15

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