EP2102443B1 - Vorrichtung zur betätigung eines bohrlochwerkzeugs - Google Patents

Vorrichtung zur betätigung eines bohrlochwerkzeugs Download PDF

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Publication number
EP2102443B1
EP2102443B1 EP07701581A EP07701581A EP2102443B1 EP 2102443 B1 EP2102443 B1 EP 2102443B1 EP 07701581 A EP07701581 A EP 07701581A EP 07701581 A EP07701581 A EP 07701581A EP 2102443 B1 EP2102443 B1 EP 2102443B1
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EP
European Patent Office
Prior art keywords
hollow piston
trigger element
tubular
piston
tool according
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.)
Not-in-force
Application number
EP07701581A
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English (en)
French (fr)
Other versions
EP2102443A1 (de
Inventor
Erik Dithmar
Phillipe Fanuel
Erik Moi Stein
Luis Quintana
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.)
Halliburton Energy Services Inc
Original Assignee
Halliburton Energy Services NV
Halliburton Energy Services Inc
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 Halliburton Energy Services NV, Halliburton Energy Services Inc filed Critical Halliburton Energy Services NV
Publication of EP2102443A1 publication Critical patent/EP2102443A1/de
Application granted granted Critical
Publication of EP2102443B1 publication Critical patent/EP2102443B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
    • 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
    • E21B23/0413—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 means for blocking fluid flow, e.g. drop balls or darts
    • 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 piston immobilized by the activation device is subjected to a differential pressure that acts on the piston up or down.
  • the activation device provides a tubular extension extending the piston. The end of this extension is held fixed in a tubular sleeve by shear pins. The sleeve rests on a ring forming stop and attached to the tubular body of the tool. This stop prevents the movement of the piston subjected to a differential pressure and thus producing a tensile force on the tubular sleeve, as long as this pressure remains below a predetermined threshold.
  • the shear pins are calibrated so that a pulling force of the piston greater than the aforesaid threshold causes a shear of the pins and releases the hollow piston which can then slide in the axial cavity of the tubular body of the tool.
  • the piston turned motor then allows the deployment of cutting arms.
  • the calibrated value of the shear pins is a compromise between, on the one hand, the limit of use of the tool in its dormant mode, that is to say when the hollow piston is not activated, and the limit of the maximum acceptable pressure by the tool or available from the drilling pumps.
  • the caliber of the shear pins is expected as high as possible. Shearing is caused by temporary plugging of the tubular sleeve by a ball and / or by a very large increase in the pressure of the drilling muds. The substantial energy stored by the motor piston must then be dissipated upon release of the piston caused by breakage of the pins. The resulting shock can cause deformations of parts and alter the subsequent operation of the tool.
  • the present invention aims to develop an activation device that is not subject to the risk of accidental activation of the hollow piston and that allows selective activation thereof without significant release of energy so as to release the hollow piston in the axial cavity of the drilling tool, always adequate.
  • safety measures will be provided to prevent the movement of the parts of the tool is prevented or hampered by drilling muds.
  • the tubular expansion sleeve is inserted between the trigger element integral with the hollow piston and an extension of the hollow piston, so as to slide between them after shearing of said at least one pin of shear.
  • the tubular sleeve comprises a first wall portion having a first thickness and a second wall portion having a second thickness less than the first and, in its position of immobilization of the hollow piston, the trigger member is radially supported on said first wall portion of the sleeve tubular and, in its erasing position, it bears radially on said second wall portion.
  • the trigger element is formed of a ring of blades which extend axially around the first part of the tubular sleeve in the immobilization position of the trigger element and which are supported radially on said second portion of the tubular sleeve when the trigger element is in the erasing position.
  • the tubular extension extending the hollow piston is provided with a ring of blades, preferably metal, preferably spring steel.
  • the rigid tubular sleeve is fixedly held at this extension by shear pins. In this position the blades rest on the thick part of the sleeve and are therefore kept apart from one another.
  • the end of these blades which are advantageously thickened and protrude radially outwards, are then in axial abutment against a retaining ring projecting radially inside the tubular body. This arrangement prevents any movement of the piston and the tool is kept in its dormant mode.
  • the temporary sealing means is a ball launched into said axial cavity, the tubular expansion sleeve comprising a seat for receiving this ball and lateral openings to restore a flow of hydraulic fluid when the tubular sleeve is in its release position.
  • a hydraulic pressure obtained by closing the passage of the drilling muds by means of said ball exerts a force on the sleeve.
  • This effort which can be minimal, causes shearing of the shear pins and releases the sleeve that can be released.
  • the blades of the trigger element are then in front of the thinned portion of the sleeve and they can flex radially inwards, for example under a radial thrust of the retaining ring or under the action of an elastic restoring force. In this bent position, the blades can slide inside the retaining ring under the action of the tension of the released hollow piston. The tool is then activated.
  • Figures 1 and 2 is an example of a bottom tool according to the invention on which an activation device can be arranged.
  • the tool is an enlargement and stabilization tool to be implemented in a borehole. It could however be any tool using a piston engine that must be activated only when the tool is in position in the borehole and is immobilized during the descent.
  • the tool illustrated on Figures 1 and 2 comprises a tubular body 1 to be mounted between a first section of a drill string and a second section thereof.
  • This tubular body 1 has an axial cavity 2 in which the drilling muds circulate.
  • the tubular body 1 comprises housings 3 provided with an opening towards the outside.
  • a knife element 4 is housed in each housing 3 and it comprises two cutting arms 5 and 6 hinged together and on a transmission means in the form of a slide 7. In the illustrated position the arms 5 and 6 are recessed in their housing and the tool is in sleep mode.
  • a motor means designed in the form of a hollow piston 8 is arranged inside the tubular body 1, allowing unhindered flow of sludge inside the tubular body.
  • the hollow piston 8 is connected to the slider 7.
  • the drilling muds can accumulate in a chamber or annular cul-de-sac 10 where the stud 8 is, by its surface 11, in contact with the hydraulic fluid under pressure formed by the drilling muds.
  • the piston is, in the illustrated case, indirectly supported on a return spring 12 which, at its opposite end, abuts on an element integral with the tubular body 1 and acts in the opposite direction to the above-mentioned pressure of the hydraulic fluid passing through the axial cavity 2.
  • the piston 8 is provided with a tubular extension 13 of the downstream side around which the return spring is arranged bearing on it, which allows an off-center arrangement of the spring 12 relative to the cutting arms.
  • This extension is provided with a trigger element 14 which is therefore integral with the piston 8.
  • the trigger element is formed of a ring of blades 15 which are advantageously flexible, for example made of spring steel, which extend axially downstream around a portion of the tubular extension 13.
  • a tubular expansion sleeve 16 is inserted between the blades 15 of the trigger element 14 and said tubular extension 13 of the hollow piston 8. This sleeve is connected to the extension 13 by shear pins 17, only one of which is shown .
  • the tubular sleeve 16 in its downstream portion 18, has a greater thickness than in its upstream portion 19 and advantageously the transition between the downstream and upstream parts is made sloping.
  • the blades 15 of the trigger member 14 bear against the thicker downstream portion 18 of the sleeve and are thus kept spaced radially outwardly.
  • the tubular expansion sleeve 16 is provided with a receiving seat 22 for receiving a closure means 23, a ball in the illustrated case, which is launched from the surface.
  • the sleeve 16 is also provided with lateral openings 24, only one of which is shown on the figure 3 .
  • the blades 15 have reached, by elastic return, in radial support against the thinned portion 19 of the tubular expansion sleeve 16. It could also be provided that this bending of the blades 15 results from an elastic deformation under a thrust in the radial direction of the biased end of the retaining ring 21.
  • the blades 15 are thus moved into an erasing position in which they are no longer in axial abutment against the retaining ring 21.
  • the blades 15 of the trigger element 14 in the erasing position can pass inside said ring 21.
  • the hollow piston 8 is now released and the tool is activated. In this case, the piston can control a deployment of the cutting arms 5 and 6 to proceed for example to an enlargement of the borehole.
  • the tool has an annular chamber in cul-de-sac 10 which extends between, on the one hand, the tubular body 1 and, on the other hand, the hollow piston 8 and its extension tubular 13 through which the drilling muds pass.
  • the surface 11 of the piston axially limits the chamber 10, on one side, and, on the opposite side, it is limited by an annular ring 26.
  • This annular ring 26 is connected to the tubular body 1 via at least one shear pin 27.
  • a communication for fluid, in the form of orifices 25, allows penetration of the drilling muds inside the hollow piston 8 in the annular chamber 10.
  • the surface 11 of the piston 8 is thus subjected to pressure variations of the sludge. drilling passing through the tool.
  • the hollow piston 8, released by erasure of the trigger element, is thus able to slide between a first position shown on the figure 6 which corresponds to the immobilization position of the non-released piston, and a position where the annular chamber 10 has a volume greater than that of the first position, the piston being pushed upwards under the pressure of the drilling muds.
  • the piston can be returned to its first position by the return spring 12 in the event of a reduction in the pressure of the drilling muds passed through the body of the tool.
  • Each movement of the engine piston 8 causes a phenomenon of suction (increase of the volume of the chamber 10 when the piston is in the raised position) and rejection (decrease of the volume 10 when the piston is in the lower position) of the drilling mud by the orifices 25 in and respectively out of the dead-end chamber 10.
  • suction increase of the volume of the chamber 10 when the piston is in the raised position
  • rejection decrease of the volume 10 when the piston is in the lower position
  • These sludge movements associated with settling effects of solid particles of the sludge or centrifugal effects of the solid particles of the sludge, can cause fouling excessive volume of the chamber 10.
  • the percentage of stagnant sludge volume which is not renewed, may present a cementing phenomenon. Stuffing the volume of the chamber 10 can thus prevent the complete stroke of the movement of the motor piston, hindering the complete removal of the cutting arms 5 and 6.
  • the cutting arms partially exposed outside the main tubular body 1 form an obstacle to the rise of the tool, at the time of passage at the location of a restriction of the diameter of the well.
  • the reaction on the cutting arms due to the tensile force of the tool blocked by the restriction of the diameter of the hole, transmits, via the sliders 7, an additional restoring force to the engine piston.
  • the increase in the compacting effect of the particles in the dead volume of the chamber 10 generates a pressure on the ring 26.
  • This pressure force on the ring 26 causes, beyond a predetermined threshold, a shear of the pins. 27 of the ring 26.
  • the ring no longer secured to the main tubular body 1 can under the effect of the compaction pressure move downwards, while allowing the complete movement of the engine piston and consequently the complete withdrawal of cutting arm.
  • the piston and its tubular extension may be arranged so as to undergo downward pressure from the drilling muds.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (15)

  1. Bohrlochwerkzeug, umfassend
    - einen röhrenförmigen Körper (1), der mit einem axialen Hohlraum (2) versehen ist,
    - einen hohlen Kolben (8), der in dem axialen Hohlraum gleiten kann und variablem hydraulischem Differentialdruck ausgesetzt ist, und
    - eine Vorrichtung zur Betätigung des hohlen Kolbens, dadurch gekennzeichnet, dass die Betätigungsvorrichtung umfasst:
    - ein mit dem hohlen Kolben (8) verbundenes Aufhalterelement (14), das von einer Position zur Feststellung des hohlen Kolbens, in der das Aufhalterelement am Anschlag gegen den jeweiligen Differentialdruck an einer Abstützung des röhrenförmigen Körpers zurück gehalten wird, in eine Freigabeposition verschoben werden kann, in der sich das Aufhalterelement (14) nicht am Anschlag an der Abstützung befindet und den hohlen Kolben freigibt,
    - eine röhrenförmige Hülse (16) zur Entspannung des Aufhalterelements (14), die in der Feststellungsposition des Aufhalterelements mit dem hohlen Kolben (8) durch mindestens einen Abscherstift (17) verbunden ist und eine Verschiebung des Aufhalterelements aus seiner Position zur Feststellung des hohlen Kolbens in seine Freigabeposition verhindert, und
    - ein Mittel (23) zum vorübergehenden Verschluss der röhrenförmigen Entspannungshülse (16), das in Verschlussposition eine Erhöhung des Hydraulikdrucks auf der röhrenförmigen Hülse (16) über eine vorbestimmte Schwelle, an der ein Abscheren des mindestens einen Abscherstiftes (17) stattfindet, und ein Gleiten der röhrenförmigen Entspannungshülse (16) in eine Freigabeposition hervorruft, wodurch eine Verschiebung des Aufhalterelements (14) aus einer Position zur Feststellung des hohlen Kolbens (8) in seine Freigabeposition ermöglicht wird.
  2. Werkzeug nach Anspruch 1, dadurch gekennzeichnet, dass die röhrenförmige Entspannungshülse (16) zwischen dem mit dem hohlen Kolben (8) verbundenen Aufhalterelement (14) und einer Erweiterung (13) des hohlen Kolbens eingesetzt wird, um zwischen diesen nach Abscheren des mindestens einen Abscherstiftes (17) gleiten zu können.
  3. Werkzeug nach Anspruch 2, dadurch gekennzeichnet, dass die röhrenförmige Hülse (16) einen ersten Teil (18) mit einer Wand mit einer ersten Dicke und einen zweiten Teil (19) mit einer Wand mit einer zweiten, geringeren Dicke als die erste umfasst, und dass das Aufhalterelement (14) in seiner Position zur Feststellung des hohlen Kolbens radial am ersten Teil der Wand (18) der röhrenförmigen Hülse und in seiner Freigabeposition radial am zweiten Teil der Wand (19) abgestützt ist.
  4. Werkzeug nach Anspruch 3, dadurch gekennzeichnet, dass der röhrenförmige Körper als oben erwähnte Abstützung einen Haltering (21) umfasst, der radial nach innen zum axialen Hohlraum vorspringt, und dass das Aufhalterelement (14) in seiner Position zur Feststellung des hohlen Kolbens (8) axial an dem Ring anschlägt und in seiner Freigabeposition von dem im Inneren des Ringes (21) frei gegebenen hohlen Kolben mitgenommen wird.
  5. Werkzeug nach einem der Ansprüche 3 und 4, dadurch gekennzeichnet, dass das Aufhalterelement (14) von einem Lamellenkranz (15) gebildet ist, der sich axial um den ersten Teil (18) der röhrenförmigen Hülse (16) in der Feststellungsposition des Aufhalterelements (14) erstreckt und radial am zweiten Teil der Wand (19) abgestützt ist, wenn sich das Aufhalterelement (14) in Freigabeposition befindet.
  6. Werkzeug nach Anspruch 5, dadurch gekennzeichnet, dass die Lamellen (15) des Kranzes aus Federstahl sind.
  7. Werkzeug nach einem der Ansprüche 5 und 6, dadurch gekennzeichnet, dass die erwähnten Lamellen (15) ein verdicktes freies Ende (20) aufweisen, das radial nach außen vorspringt, und dass sie in Feststellungsposition des Aufhalterelements (14) am Haltering (21) abgestützt sind.
  8. Werkzeug nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Mittel (23) zum vorübergehenden Verschluss eine Kugel ist, die in den axial Hohlraum (2) geworfen wird, und dass die röhrenförmige Entspannungshülse (16) einen Sitz (22), um diese Kugel aufzunehmen, und seitliche Öffnungen (24) umfasst, die es ermöglichen, eine Hydraulikfluidzirkulation wieder herzustellen, wenn sich die röhrenförmige Hülse (16) in ihrer Freigabeposition befindet.
  9. Werkzeug nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass es ein Nachnahmebohrer ist, der mit Messerelementen (4) versehen ist, die als aneinander angelenkte Schneidarme (5, 6) ausgebildet sind, und dass der hohle Kolben (8) ein Antriebsmittel ist, das eine Erweiterung der Schneidarme über den röhrenförmigen Körper (1) des Werkzeugs hinaus ermöglicht.
  10. Werkzeug nach Anspruch 9, dadurch gekennzeichnet, dass es ferner eine Rückstellfeder (12) umfasst, die auf den hohlen Kolben (8) einwirkt, um ihn in Richtung seiner Feststellungsposition zurückzuführen, in der die Schneidarme in eingezogener Position sind.
  11. Werkzeug nach Anspruch 10, dadurch gekennzeichnet, dass die Rückstellfeder (12) um eine röhrenförmige Erweiterung (13) des hohlen Kolbens angeordnet ist, um auf dieser zur Anlage zu kommen.
  12. Werkzeug nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass der jeweilige auf den hohlen Kolben (8) einwirkende variable Hydraulikdruck nach oben gerichtet ist.
  13. Werkzeug nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass es ferner umfasst:
    - eine Sackkammer (10), die sich ringförmig zwischen dem röhrenförmigen Körper (1) und dem hohlen Kolben (8) und/oder einer röhrenförmigen Erweiterung (13) desselben, durch die die Bohrschlämme verlaufen, erstreckt, wobei eine Fläche (11) des hohlen Kolbens axial diese Sackkammer auf einer ersten Seite begrenzt,
    - einen ringförmigen Ring (26), der axial die Sackkammer (10) auf einer zweiten, der ersten gegenüber liegenden Seite begrenzt und der mit dem röhrenförmigen Körper durch mindestens einen Abscherstift (27) verbunden ist,
    - eine Verbindung (25) für ein Fluid zwischen dem Inneren des hohlen Kolbens (8) und/oder seiner röhrenförmigen Erweiterung (13) und der Sackkammer (10), wobei die Fläche (11) des hohlen Kolbens auf diese Weise dem jeweiligen variablen hydraulischen Differentialdruck der Bohrschlämme ausgesetzt ist,
    - wobei der hohle Kolben (8), der durch Freigabe des Aufhalterelements (14) freigegeben wird, zwischen einer ersten Position, in der die Sackkammer (10) ein erstes Volumen aufweist, und einer zweiten Position, in der die Sackkammer ein zweites, größeres Volumen als das erste aufweist, gleiten kann, sowie
    - Rückstellmittel (4, 5, 6, 7, 12), die auf den hohlen Kolben einwirken, um ihn in seine erste Position zurückzuführen, wobei der mindestens eine Abscherstift (27), wenn ein Hindernis den hohlen Kolben daran hindert, in seine erste Position zurückzukehren, und dadurch den auf den ringförmigen Ring ausgeübten Druck über eine vorbestimmte Schwelle erhöht, abgeschert wird, wobei er den ringförmigen Ring (26) freigibt und so eine Rückkehr des hohlen Kolbens in seine erste Position ermöglicht.
  14. Werkzeug nach Anspruch 13, dadurch gekennzeichnet, dass es Spielräume zwischen Teilen und Leervolumina aufweist, und dass dieses Spielräume und Leervolumina mit einem Fett oder einem Gel gefüllt sind.
  15. Werkzeug nach Anspruch 14, dadurch gekennzeichnet, dass die Sackkammer (10) ein Leervolumen des Werkzeugs ist.
EP07701581A 2007-01-11 2007-01-11 Vorrichtung zur betätigung eines bohrlochwerkzeugs Not-in-force EP2102443B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/BE2007/000004 WO2008083448A1 (fr) 2007-01-11 2007-01-11 Dispositif d'activation d'un outil de fond

Publications (2)

Publication Number Publication Date
EP2102443A1 EP2102443A1 (de) 2009-09-23
EP2102443B1 true EP2102443B1 (de) 2010-08-11

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Country Status (8)

Country Link
US (2) US8251161B2 (de)
EP (1) EP2102443B1 (de)
CN (1) CN101636551B (de)
AT (1) ATE477396T1 (de)
CA (1) CA2674030C (de)
DE (1) DE602007008471D1 (de)
NO (1) NO20092683L (de)
WO (1) WO2008083448A1 (de)

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US8936112B2 (en) 2015-01-20
CA2674030C (en) 2015-06-30
NO20092683L (no) 2009-10-06
CN101636551B (zh) 2012-07-11
CN101636551A (zh) 2010-01-27
CA2674030A1 (en) 2008-07-17
ATE477396T1 (de) 2010-08-15
EP2102443A1 (de) 2009-09-23
US8251161B2 (en) 2012-08-28
US20120318497A1 (en) 2012-12-20
US20100126715A1 (en) 2010-05-27
DE602007008471D1 (de) 2010-09-23
WO2008083448A1 (fr) 2008-07-17

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