EP0531336B1 - Doppelkernrohr für abgelenkte bohrungen - Google Patents

Doppelkernrohr für abgelenkte bohrungen Download PDF

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Publication number
EP0531336B1
EP0531336B1 EP91909440A EP91909440A EP0531336B1 EP 0531336 B1 EP0531336 B1 EP 0531336B1 EP 91909440 A EP91909440 A EP 91909440A EP 91909440 A EP91909440 A EP 91909440A EP 0531336 B1 EP0531336 B1 EP 0531336B1
Authority
EP
European Patent Office
Prior art keywords
inner tube
tube
bearing
outer tube
drilling
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.)
Expired - Lifetime
Application number
EP91909440A
Other languages
English (en)
French (fr)
Other versions
EP0531336A1 (de
Inventor
Staffan Paues
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 Stratabit SA
Original Assignee
Diamant Boart Stratabit 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 Stratabit SA filed Critical Diamant Boart Stratabit SA
Publication of EP0531336A1 publication Critical patent/EP0531336A1/de
Application granted granted Critical
Publication of EP0531336B1 publication Critical patent/EP0531336B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/10—Formed core retaining or severing means
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation 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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling

Definitions

  • the present invention relates to a double corer for deviated drilling comprising, on the one hand, a rotary external tube carrying a drilling ring, and on the other hand, a non-rotating internal tube carrying at a first end, close to the ring sounding, a carrot extraction device formed by an extractor spring and a conical shoe while the other end is screwed onto a non-rotating part of a ball or needle bearing, with multiple bearings connecting the inner tube to outer tube, said bearing consisting of a series of concentric bearing rings aligned on the same axis, holding captive balls and / or needles housed in a sealed rotary case filled with oil or grease, fixed to the outer tube, possibly adjustable along the latter.
  • deviated drilling drilling lies in the possibility of taking numerous samples at great depth from a single drilling point, at various locations along a substantially horizontal oil table. These holes allow the investigation of the composition of the aquifer and its extent.
  • a deviated drilling borehole can be carried out using a double borehole sampler as described in document US-A-2555580.
  • a double corer for deviated drilling comprises, on the one hand a rotary external tube provided with a drilling crown, and on the other hand a non-rotating internal tube carrying at a first end, adjacent to the drilling crown, a device of carrot extraction formed by an extractor spring and a conical shoe while the other end is screwed onto a non-rotating part of a ball or needle bearing, with multiple bearings consisting of a series of rings -concentric bearings aligned on the same axis and fixed to the outer tube, optionally adjustable along the latter; the bearing connecting the inner tube to the outer tube consists of a series of concentric bearing rings aligned on the same axis and holding captive balls and / or needles housed in a sealed housing filled with oil or grease.
  • the inner tube of the double core barrel has, by construction, a relatively thin wall in order to extract a core of maximum section. It can therefore be seen that, during a borehole borehole drilling, the inner tube of a double core barrel, which has an inclined or horizontal position during deviated drilling, flexes inside the outer tube under the weight of the carrot during sampling.
  • the deflection mentioned above is also the cause of tensions in the ball or needle bearing connecting the rotary outer tube to the fixed inner tube. This deflection causes friction forces to appear between the core and the inner tube and between the inner tube and the outer tube. These frictions tend to degrade the free rotation of the outer tube relative to the inner tube and cause the inner tube to rotate. causing early failure of the core barrel.
  • the deflection of the inner tube causes a partial destruction of the sample taken by the corer.
  • the present invention provides a corer specially adapted for deviated drilling by the use of means and accessories which strengthen the rigidity of the inner tube of the corer, prevent any defect in sealing, and ensure its concentricity and reliability.
  • this corer is characterized in that the extractor device and the inner wall of the core tube are covered with an anti-friction coating; - the outer wall of the inner tube comprises a set of stabilizing elements distributed along the tube inside between the latter and the outside tube; the conical shoe forming the lower part of the inner tube is centered in the sounding ring by centering ribs separating the flow channels; the clog is fitted with a bevelled lower lip and flared inwards so as to facilitate the introduction of the carrot into the inner tube.
  • the ball or needle bearing consists of a multi-bearing bearing, some of which offer four support points.
  • the bearing consists of a ring carried by several series of ball bearings and / or needles distributed not only concentrically around the axis of rotation but also axially along the axis protected by a sealed housing containing an oil or grease bath.
  • the extraction device allows the carrot to be retained in the inner tube. It consists of the extractor spring and the conical shoe.
  • the extractor spring is formed by a split ring, the inner face of which is covered with a gripping coating resting on the conical shoe which has a beveled edge widening downwards, so as to enlarge the entry section of the tube. inside up to a diameter close to the inside diameter of the crown.
  • the concentricity of the conical shoe supporting the extraction device relative to the crown is ensured by the beveled conical shoe which is supported on longitudinal centering ribs, separated from each other by fluid flow channels of drilling.
  • this closure device is known (see document BE-A-8700395).
  • it is essential to pass the drilling liquid in the direction of the arrows X through the inner tube 2 in order to remove the scree that has accumulated in the inner tube 2 and at the bottom of the well.
  • This clearing is obtained by using the fully open core barrel, that is to say one not yet provided with the sealing ball 46, so as to allow the drilling liquid to pass through the inner part of the inner tube 2.
  • FIG. 3 A first embodiment of the closure device specially adapted to the double corer for deviated drilling is illustrated in the Figure 3.
  • This device consists of a metal basket 49 without bottom flared up.
  • the side wall of the basket 49 is formed of elastically deformable curved fingers 50. These fingers are retained by the upper edge 51 of the basket 49. They have the function of maintaining the ball on its seat whatever the inclination of the deviated drilling.
  • the non-rotating part 12 of the ball or needle bearing 11 is extended by inner tube elements 2 of constant diameter.
  • the bearing 11 consists of a series of concentric bearing rings 7 housed in a sealed annular housing 21 filled with oil or grease 22 ( Figure 2).
  • the concentric bearing rings 68 hold captive between them balls 69 and / or needles 50.
  • the outer part of the housing 21 is therefore not rotated.
  • the housing 21 is sealed by baffles 25 and by a seal 26.
  • a first embodiment of the core barrel according to the invention, for deviated or horizontal drilling, is, in its operating principle, derived from the double core barrel described in Belgian patent No. 875.016.
  • the core barrel has an adjustable head whose position is adjusted by moving, by rotation, a sleeve 13 of the upper part of the bearing 11 in either direction, along a thread 5 of the body 4 of the outer tube 1. This succeeds in correcting the spacing between the conical shoe 32 of the extractor spring 8 and the sounding ring 3 (see FIG. 4).
  • the purpose of this adjustment is to compensate for the differences in length of the interior and exterior assemblies due to manufacturing tolerances and differential thermal expansion, in particular when using an interior tube 2 in aluminum or fiberglass.
  • a blocking cap 18 is put in place in order to prevent any subsequent relative displacement between the inner tube and the outer tube (FIG. 1C).
  • the locking cap 18 having at least one lug 20 makes it possible to angularly block the rotary part 12 of the bearing 11 with balls or needles on the threaded body 4 of the outer tube 1 and thus prevent the relative rotation of the latter relative to one another. to each other around their common vertical axis, thanks to a pair of diametrically opposite longitudinal grooves 17 of the sleeve 13 of the upper part of the bearing 11 and two diametrically opposite notches 6 of the threaded bore of the body 4 of the outer tube 1 ( see BE-A-875.016)
  • the body 4 of the outer tube 1 is mounted on the outer tube 1 by a seal 29 called security, consisting of a single thread of square section.
  • security consisting of a single thread of square section.
  • this thread is undone in the case where the outer tube 1 is driven in reverse rotation with a view for example to unlock a part of the core barrel when the latter is jammed.
  • the end opposite to that of the cap 18 is suitable for serving to wedge the bearing rings 7 and the bearings with four abovementioned support points.
  • the extraction device 9 and the inner wall 38 of the inner tube 2 are covered with an anti-friction coating composed, for example, of a teflon film.
  • an anti-friction coating composed, for example, of a teflon film.
  • the inner tube comprises a set of stabilizing elements 67 distributed along the inner tube 2 between the latter and the outer tube 1.
  • This set of stabilizing elements 67 makes it possible to correctly center the inner tube 2 in the outer tube 1 possibly also provided with stabilizing elements 35 and, when the core barrel is in a horizontal position, it reduces the deflection of the inner tube 2 under the effect of its own weight and that of the core (FIG. 9).
  • These stabilizing elements 67 constitute intermediate bearings with smooth friction bearing on the inner wall of the outer tube 1.
  • the stabilizing elements 67 in no way prevent the adjustment of the spacing between the lower ends of the conical shoe 32 and the crown sounding hole 3, since they can slide longitudinally along the inner wall of constant diameter of the outer tube 1.
  • the stabilizing elements 67 contribute to maintaining the straightness of the inner tube 2, one end of which can be considered to be embedded, in free rotation, in the outer tube 1 by means of the ball or needle bearing 11 formed by a bearing multiple bearings with four support points for example. These four support points help to make the inner tube 2 rigid, preventing it from bending.
  • the lower part of the inner tube 2, formed by the conical shoe 32, is centered in the crown of sounding 3 by centering ribs 34 separating the flow channels 33 (FIG. 4).
  • the shoe 32 is extended by a lower lip 14 guiding the drilling liquid longitudinally relative to the crown.
  • the lip 14 is bevelled and flared downwards so as to facilitate the introduction of the core into the inner tube 2.
  • the outer lateral wall 39 of the conical shoe 32 is covered with an anti-friction coating intended to prevent the setting in rotation of the inner tube 2 by the crown 3.
  • the combined shapes of the outer lateral wall of the conical shoe 32 and of the inner face of the crown 3 guide the drilling liquid parallel to the axis of the core.
  • the corer according to the invention has the merit of making it possible to carry out a horizontal borehole which has the advantage of making it possible to correctly determine the extent of an oil deposit made up of oil spills of large extent but of low height, there where a vertical survey would only provide summary survey results and clearly insufficient to give an estimate correct the profitability of the possible exploitation of a deposit.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Claims (3)

  1. Doppel-Kernbohrer für abgelenkte Bohrung, der einerseits ein drehbares Außenrohr (1) mit einer Bohrkrone (3) umfaßt und andererseits ein nichtdrehendes Innenrohr (2) mit einem ersten Endteil benachbart der Bohrkrone (3), einer Vorrichtung (9) zum Ausziehen eines Bohrkerns in Form einer Auszugsfeder (8) und einem konischen Fuß (32), während das andere Ende auf einem nichtdrehbaren Teil (12) eines Kugel- (68) oder vielstufigen Nadellagers (69) verschraubt ist, welches Innen- (2) und Außenrohr (1) verbindet, wobei das genannte Lager (11), welches aus einer Reihe konzentrischer Lagerelemente (7) zusammengesetzt ist, die in einer Achse ausgerichtet sind, und eingeschlossene Kugeln (68) oder Nadeln (69) enthält, die in einem drehbaren geschlossenen Gehäuse (21), gefüllt mit Öl (22) oder Fett und befestigt am äußeren Rohr (1), angeordnet sind, gegebenenfalls in einer längs dem Außenrohr verstellbaren Weise, dadurch gekennzeichnet, daß
    - das Auszugselement (9) und die Innenwand (38) des Innenrohrs (2) mit einem Antigleitbelag überzogen sind;
    - die Außenwand des Innenrohrs (2) einen Satz von Stabilisatoren (67) trägt, verteilt längs dem Außenrohr (1) zwischen Außen- (1) und Innenrohr (2); und
    - der konische Schuh (32), der die untere Partie des Innenrohres (2) bildet, in der Bohrkrone (3) zentriert ist, und zwar durch Zentrierrippen (34), die die Abflußkanäle (33) trennen, wobei der Schuh mit einer unteren Lippe (14) ausgerüstet ist, die nach außen abgeschrägt und nach innen erweitert ist, derart, daß das Einführen des Bohrkerns in das Innenrohr (2) erleichtert wird.
  2. Kernbohrer nach Anspruch 1, dadurch gekennzeichnet, daß der Satz Stabilisationselemente (67) einen Ring (28) aus selbstschmierendem Material aufweist, der sich gegen das Außenrohr (1) abstützt.
  3. Kernbohrer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Lager (11) ein Vielfachlager ist und zumindest aus zwei ringförmigen Lagerelementen 7 besteht, die in einer Achse ausgerichtet sind, um mehrere Lagerfassungen zu bilden, welche das Innenrohr (2) versteifen.
EP91909440A 1990-05-31 1991-05-30 Doppelkernrohr für abgelenkte bohrungen Expired - Lifetime EP0531336B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9000560A BE1004330A3 (fr) 1990-05-31 1990-05-31 Carottier double pour forage devie.
BE9000560 1990-05-31
PCT/BE1991/000032 WO1991019075A2 (fr) 1990-05-31 1991-05-30 Carottier double pour forage devie

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP93116845.4 Division-Into 1993-10-19

Publications (2)

Publication Number Publication Date
EP0531336A1 EP0531336A1 (de) 1993-03-17
EP0531336B1 true EP0531336B1 (de) 1994-07-20

Family

ID=3884811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91909440A Expired - Lifetime EP0531336B1 (de) 1990-05-31 1991-05-30 Doppelkernrohr für abgelenkte bohrungen

Country Status (6)

Country Link
EP (1) EP0531336B1 (de)
BE (1) BE1004330A3 (de)
CA (1) CA2083827A1 (de)
DE (1) DE69103007T2 (de)
RU (1) RU2086749C1 (de)
WO (1) WO1991019075A2 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230390A (en) * 1992-03-06 1993-07-27 Baker Hughes Incorporated Self-contained closure mechanism for a core barrel inner tube assembly
BE1011502A3 (fr) 1997-10-17 1999-10-05 Dresser Ind Carottier.
CN102124180B (zh) 2007-08-30 2014-05-14 普拉德研究及开发股份有限公司 双bha钻井系统
RU2482274C2 (ru) * 2008-10-31 2013-05-20 Шлюмбергер Текнолоджи Б.В. Интегрированная система кернового бурения
RU2515647C1 (ru) * 2012-11-08 2014-05-20 Федеральное государственное бюджетное учреждение науки Институт горного дела им. Н.А. Чинакала Сибирского отделения Российской академии наук Способ сооружения скважины
US10612334B2 (en) 2015-07-31 2020-04-07 Halliburton Energy Services, Inc. Coring inner barrel connections for core of rock protection
CN107762436A (zh) * 2017-11-17 2018-03-06 中交第航务工程勘察设计院有限公司 新型双管岩芯管
CN109025875B (zh) * 2018-08-13 2024-05-14 中国地质科学院勘探技术研究所 一种内置钢球式液力差动机构
CN111894502B (zh) * 2020-07-28 2023-03-10 四川大学 气体作为流体介质的坑道取芯方法
CN114482873B (zh) * 2022-02-23 2022-09-23 临沂金正阳管业有限公司 一种精密取芯钻钻杆用无缝钢管

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1565430A (en) * 1922-04-10 1925-12-15 Frank A Edson Drill
US2128914A (en) * 1936-02-04 1938-09-06 Cameron Iron Works Inc Core barrel mounting
US2490512A (en) * 1946-03-12 1949-12-06 Carroll L Deely Core barrel
US2555580A (en) * 1947-11-14 1951-06-05 Carroll L Deely Core barrel
US2791398A (en) * 1955-01-17 1957-05-07 Exxon Research Engineering Co Core signalling device
US2789790A (en) * 1956-06-13 1957-04-23 Ii John H Kirby Core drilling apparatus
FR1474299A (fr) * 1966-03-22 1967-03-24 Huber Corp J M Trépan carottier
US3605920A (en) * 1969-12-30 1971-09-20 Texaco Inc Core drilling apparatus with means to indicate amount of core in barrel
US3986555A (en) * 1975-04-10 1976-10-19 Dresser Industries, Inc. Apparatus for providing a packaged core
BE844368A (fr) * 1976-07-20 1976-11-16 Appareil carottier du type a cable
DE2919007C2 (de) * 1979-05-11 1982-07-22 Christensen, Inc., 84115 Salt Lake City, Utah Kernbohreinrichtung für Gesteinsbohrlöcher
SE425420B (sv) * 1980-10-10 1982-09-27 Craelius Ab Anordning for att vid kernborrning indikera ner kernroret er fylld
US4638872A (en) * 1985-04-01 1987-01-27 Diamond Oil Well Drilling Company Core monitoring device
EP0248615A3 (de) * 1986-06-04 1988-11-30 Diamond Products Limited Oreco Bohrvorrichtung
BE1000474A3 (fr) * 1987-04-14 1988-12-20 Diamant Boart Sa Dispositif pour obturer un carottier monte dans un equipement de sondage.

Also Published As

Publication number Publication date
WO1991019075A2 (fr) 1991-12-12
BE1004330A3 (fr) 1992-11-03
CA2083827A1 (fr) 1991-12-01
DE69103007T2 (de) 1995-03-09
DE69103007D1 (de) 1994-08-25
RU2086749C1 (ru) 1997-08-10
EP0531336A1 (de) 1993-03-17
WO1991019075A3 (fr) 1992-01-09

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