EP0525991A1 - Outil de ségrégation mineure pour paroi latérale - Google Patents

Outil de ségrégation mineure pour paroi latérale Download PDF

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Publication number
EP0525991A1
EP0525991A1 EP92306047A EP92306047A EP0525991A1 EP 0525991 A1 EP0525991 A1 EP 0525991A1 EP 92306047 A EP92306047 A EP 92306047A EP 92306047 A EP92306047 A EP 92306047A EP 0525991 A1 EP0525991 A1 EP 0525991A1
Authority
EP
European Patent Office
Prior art keywords
coring
assembly
tool
underreamer
sidewall
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.)
Withdrawn
Application number
EP92306047A
Other languages
German (de)
English (en)
Inventor
Raymond Paul Coey
Neil Andrew Abercrombie Simpson
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.)
INTERNATIONAL DIAMOND DRILLING
Original Assignee
INTERNATIONAL DIAMOND DRILLING
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
Priority claimed from GB919116400A external-priority patent/GB9116400D0/en
Priority claimed from GB919117956A external-priority patent/GB9117956D0/en
Application filed by INTERNATIONAL DIAMOND DRILLING filed Critical INTERNATIONAL DIAMOND DRILLING
Publication of EP0525991A1 publication Critical patent/EP0525991A1/fr
Withdrawn legal-status Critical Current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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
    • E21B7/061—Deflecting the direction of boreholes the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock
    • 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
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
    • E21B49/06—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil using side-wall drilling tools pressing or scrapers

Definitions

  • This invention relates to a sidewall coring tool especially but not exclusively for use downhole in the petroleum drilling industry.
  • Coring is normally carried out to obtain rock samples for geological data. This is the case in both the mining and petroleum industries, where cores are normally taken concentric to the bore hole.
  • a sidewall coring tool comprising a main body having means at either end for attachment to a drill string characterised in that the tool has an underreamer or hole opener assembly having a plurality of circumferentially arranged cutter arms and a coring assembly, the coring assembly being pivotally mounted on the main body and being arranged such as to be deployable at an angle to the longitudinal axis of the tool body, the underreamer being arranged to selectively perform an underreaming operation to form an annular ledge in a formation around the tool, so that the coring assembly when deployed performs a coring operation on said ledge.
  • the coring assembly may alternatively be mounted within the body of an underreamer cutter arm and arranged for deployment in the pocket formed by the underreamer.
  • hydraulic means are provided for operating the underreamer assembly. This may for example be a special adapter above the cutter arms.
  • the means for deploying the coring assembly may be mechanical or hydraulic.
  • Preferably means are provided for supporting the coring assembly in its deployed position.
  • a plurality of coring assemblies are provided spaced circumferentially around the tool body.
  • couplings are provided on the coring assemblies to receive hydraulic drive means.
  • the Sidewall Coring Tool is intended to provide a means of taking multiple cores from areas of geological interest, either in one selected region or in individual areas to the maximum number of cores available, or a combination of both.
  • one or more coring assemblies will be embodied near or within a specially designed underreamer or hole opener and that the coring operation will be performed, either:
  • coring head Other means of deploying the coring head exist, but coring onto a distinct ledge provides cores outwith the mud invasion layer yielding good quality rock samples, and this is therefore the preferred method.
  • the cores are typically between 5' to 10' in length. However, it is conceivable that core samples very much longer or shorter than this might be achieved.
  • the SCT will be operated in holes of 12.25" (opened to 17.50") and 8.50" (opened to 12.25").
  • the SCT will be connected to the drillstring in the normal manner using API (American Petroleum Institute) recommended connections.
  • the SCT consists of an underreamer attached to the drillstring directly beneath the coring assemblies.
  • the drillstring will be connected and run downhole in the normal manner until the depth specified for coring. During this time, both the underreamer and SCT will remain inert, unable to deploy their respective systems until activated from surface. The cutter arms will therefore remain within the body of the underreamer, and the coring assemblies captive within the wall of the SCT.
  • some hydraulic means will be used to deploy the cutter arms from the underreamer. This can be accomplished by running a hydraulic coupling into a special adapter above the cutter arms. The hydraulic pressure then applied from surface will deploy the cutter arms to their maximum position during the underreaming operation.
  • the full weight below the underreamer may be set down via the cutter arms onto the ledge that has been cut.
  • the hydraulic coupling may now be retracted and withdrawn to an arbitrary datum position located above the level of the drive(s) to the core barrel(s).
  • a hydraulic or mechanical mechanism selectively deploys one of the core barrel assemblies into the space between two of the cutter arms. Preferably some level of support for the length of the coring assembly will be provided.
  • the core barrel assembly is deployed from its captive position in the wall of the SCT about hinge pins which act as the fulcrum point and are set close to the core barrel drive.
  • the hinge pins will not interfere with the bore of the core barrel or its drive mechanism, but will be retained within the wall of the SCT and be externally flush.
  • the hydraulic coupling is now run forward to engage the drive of the core barrel which has been canted into the bore of the SCT.
  • the operational angle is shallow, being constrained to a maximum of about 5 degrees.
  • the means of engagement may be made easier by enabling the drive on the hydraulic coupling to find the drive in the core barrel by providing a lead-in or bell-mouth aperture in the core barrel.
  • the core barrel drive will be a simple, robust device capable of readily applying tensile and compressive forces, and torque.
  • the hydraulic coupling and drive shaft will engage the core barrel drive for the duration of the coring exercise. Mud will be circulated through the hollow drive shaft, through the drive and core barrel to the coring head to provide adequate cooling and debris removal during operation.
  • the compressive load and torque will be applied during the coring operation as the core is being cut.
  • the tensile load will be applied when the cutting of the core is finished and the rock sample must be broken.
  • the tensile load will be maintained until the core barrel has been retracted within the guide sleeve. Given that the coring is carried out at a shallow angle, the flexural fatigue of the hydraulic coupling and drive shaft is not a problem, and is well within the angular distortions already successfully applied to standard downhole equipment.
  • the hydraulic coupling and drive shaft may detach and withdraw to its datum position in anticipation of further coring exercises, should this be required.
  • the core barrel assembly deploying mechanism may now be deactivated such that the full assembly is returned to its captive position in the wall of the SCT.
  • the deployment/redeployment actuating mechanism will provide the means to index the "garages" of the SCT (or access to the "garages") to ensure that:
  • the multiple "garage” principle permits cores to be cut from various depths within one trip.
  • the number of cores cut on any trip is of course limited by the number of "garaged” core barrel assemblies which can be successfully incorporated within the wall of the SCT. For different applications this may vary.
  • the SCT consists of coring assemblies physically incorporated within the material of the cutter arms of an underreamer.
  • the cutter arms will necessarily be much longer than those used normally.
  • the excess length is due to the shallow angle of operation required when coring, where it is anticipated that the angle will be constrained to about 5 degrees maximum.
  • the drillstring will be connected and run downhole in the normal manner until the SCT reaches the depth specified for coring.
  • the SCT will remain inert, unable to deploy the cutter arms until activated from surface.
  • the cutter will therefore remain within the main body of the underreamer, and the coring assemblies remain captive within each cutter arm.
  • some hydraulic means will be used to deploy the cutter arms from the underreamer. Typically, this may be achieved using the principle of differential cross-sectional areas across the length of a piston.
  • the actuating piston As hydraulic pressure is applied to the fluid in the drillstring by the surface pumps, the actuating piston is displaced axially, possibly compressing a heavy duty return spring. As the actuating piston moves downwards, a mechanism (possibly a linkage) attached to the lower part of the cutter arm, forces the arm to rotate on its hinge pin and move outwards. Combined with rotation of the drillstring, the cutter arms will open (or underream) a short section of the hole.
  • the short section between the end of the core head and the bottom of the cutter arm may be packed with wax (or similar drillable plug material) to prevent the ingress of rock debris and cutting fluid during the underreaming cycle.
  • the full weight of the drilling assembly below the tool may be set down via the cutter arms onto the ledge that has been cut.
  • the cutter arms will be held open by the arm geometry, that is the centre point of load will be outside centre of rotation, creating a geometric lock 2eld in place by the downward force of the assembly weight below the tool. This load will be too great for the return spring to overcome and the hydraulic pressure applied in the first instance may now be released if necessary.
  • a hydraulic coupling and drive may now be deployed from its datum point where it has remained inert.
  • the hydraulic coupling and drive is run down through the internal bore of the actuating piston until it contacts an angled ledge or step located in one position only in the bore. This ledge will be sufficient to deflect the coupling into the long elliptical opening directly opposite to engage the drive of the core barrel. It is intended that the core barrel drive mechanism is a relatively simple device which will readily apply tensile and compressive forces, and torque.
  • the hydraulic coupling and drive shaft will engage the core barrel drive for the duration of the coring exercise. Mud will be circulated through the hollow drive shaft, through the drive and core barrel to the coring head to provide adequate cooling and debris removal during operation.
  • a tensile load is applied through the core barrel drive to break the rock sample and retract the core assembly within the cutter arm.
  • the assembly will be retracted sufficiently to latch onto the core barrel retention mechanism described above. Once this occurs, any further application of a tensile load will disengage the drive mechanism and retract the hydraulic coupling and drive from the cutter arm into the core of the actuating piston, thence to its datum point.
  • the orientation of the angled ledge or step in the actuating piston bore must change to ensure that the hydraulic coupling and drive may only engage a virgin coring assembly.
  • the applied pressure of the surface pumps may be reduced or removed, and the drill assembly then lifted off the underreamed shoulder where it has been hanging. This will be sufficient to allow the heavy duty return spring to drive the actuating piston to its datum position.
  • the actuating piston will move down and deploy the cutter arms of the underreamer as before. However, as the actuating piston moves down under the pressure, it may index on a mechanism (possibly a J-slot configuration) which rotates it through an angle which orients the angled ledge or step to a position opposite the aperture of a virgin coring assembly.
  • a mechanism possibly a J-slot configuration
  • each core barrel drive may be completed by the return spring.
  • the applied pressure of the surface pumps would be reduced or removed as above, and the drilling assembly lifted off the underreamed shelf where it has been hanging.
  • the return spring then tends to its free length, the actuating piston is driven up the bore of the SCT towards its datum position. As it goes, it may index through the required angular displacement such that it is pre-positioned for the next coring run. It is recognised that alternatives to the two methods outlined here exist, and may be produced as alternative designs.
  • the SCT incorporating coring assemblies within the cutter arms(s) of the underreamer permits relatively long rock samples to be taken outwith the mud invasion zone using the underreamer arms as the means of support.
  • the bore of the cutter arms acts like a gunbarrel for the coring assembly, and except for rotation of the drillstring during coring it is very difficult to destroy the coring assembly in operation.
  • the drive mechanism used in both systems described above is run in from an arbitrary datum to engage in the drive of the coring assembly.
  • the hydraulic coupling and drive (which are an integral unit) may be incorporated in a type of telescopic joint.
  • a type of telescopic joint may be based around a standard drill collar modified to accept a polished joint sliding through it.
  • the overall length of the assembly is sufficient to enable the full traverse of the sliding joint to take the required length of core sample.
  • the sliding arm of the telescopic joint may be connected to the drillstring in the normal manner using standard API recommended threadforms.
  • the external surface of the sliding joint necessarily requires some degree of polish to enable it to slide easily through the gland packing material located in the top of the modified drill collar.
  • the sliding joint may require a splined end to engage with a similar spline machined internally in the modified drill collar. In this way, rotation of the drillstring would impart torque to the cutting arms of the underreamer. Beneath the splines, it would be necessary to attach the hydraulic coupling and drive. This may be a relatively long, but slender hollow tube, adapted at the drive end to permit it to impart torque to drive the coring assembly and also tensile and compressive loads.
  • the telescopic joint method of applying drive may be readily withdrawn after the core has been taken by pulling up slowly at the rotary table.
  • the tensile load would break the core rock sample and withdraw the coring assembly to either its "garaged” position in the “garaged” design or within the body of the particular cutter arm in the "integral" design.
  • the tool comprises a hollow tubular body 1 which is connected to an underreamer device 2 of generally know type.
  • a coring assembly 3 is positioned within an aperture 4 in the body 1 and mounted on a pivot 5. In its retracted or non deployed position the coring assembly fits within the aperture 4 so as not to interfere with the normal drilling operation or underreaming operation. In its immediately deployed position, as shown in Fig. 4a, the coring assembly extends at a shallow angle, in this case 3.5 degrees maximum, but other angles are possible.
  • the coring assembly 3 extends, as in Fig. 3, and effectively carries out a coring operation as shown in Fig. 4b where a core barrel 3a extends from the coring assembly 3.
  • a hydraulic coupling 6 provides a drive means and a conduit for mud flow.
  • Fig. 5a to 5e show various stages in the operation of the tool.
  • the tool is inactive with neither the underreamer 2 nor the coring assembly or assemblies 3 being activated.
  • the underreamer is brought into action to create the ledge into which the coring assembly 3 may be advanced.
  • the weight is taken on the underreamer arms, the hydraulic coupling retracted and the coring assembly 3 is deployed as shown in Fig. 5c.
  • the coring operation is carried out and the assembly then retracted back to its original position.
  • the core sample is parked and another core assembly 3, if more than one is included, may selectively be deployed.
  • an underreamer assembly 12 has cutter arms 12a which contain coring assemblies 13.
  • Fig. 7 shows schematically the core barrel horrctory and
  • Fig. 8 shows the deployment of a core barrel 13a of the coring assembly 13 following deployment of the cutter arms 12a.
  • the cutter arms 12a are driven outwardly by virtue of a linkage 14 attached to a piston 15 which is driven downwardly against a return spring 16 by hydraulic pressure. Following release of the pressure the return spring forces the piston back up to retract the cutter arm 12a.

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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)
  • Soil Sciences (AREA)
  • Sampling And Sample Adjustment (AREA)
EP92306047A 1991-07-30 1992-06-30 Outil de ségrégation mineure pour paroi latérale Withdrawn EP0525991A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9116400 1991-07-30
GB919116400A GB9116400D0 (en) 1991-07-30 1991-07-30 Sidewall coring tool
GB9117956 1991-08-20
GB919117956A GB9117956D0 (en) 1991-08-20 1991-08-20 Sidewall coring tool

Publications (1)

Publication Number Publication Date
EP0525991A1 true EP0525991A1 (fr) 1993-02-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP92306047A Withdrawn EP0525991A1 (fr) 1991-07-30 1992-06-30 Outil de ségrégation mineure pour paroi latérale

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EP (1) EP0525991A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2305953A (en) * 1995-10-07 1997-04-23 Corpro Systems Ltd Selective core sampling after logging
EP0823534A1 (fr) * 1996-07-30 1998-02-11 Anadrill International, S.A. Dispositif permettant de réaliser des forages secondaires à partir d'un forage principal
US5944107A (en) * 1996-03-11 1999-08-31 Schlumberger Technology Corporation Method and apparatus for establishing branch wells at a node of a parent well
GB2334981A (en) * 1998-03-02 1999-09-08 Bachy Soletanche Limited Underream soil testing
US6283216B1 (en) 1996-03-11 2001-09-04 Schlumberger Technology Corporation Apparatus and method for establishing branch wells from a parent well
EP1537289A2 (fr) * 2002-06-10 2005-06-08 Re-Entry Technologies, Inc. Nouveau procede ameliore et appareil comprenant un guide de sortie et un laminoir a profiles combines, integres ou autre pour la deviation ou le sondage devie a partir de puits de forage existants
CN112710498A (zh) * 2020-12-15 2021-04-27 浙江大学 一种深海沉积物样品转移与在线检测系统及其应用方法
WO2022121111A1 (fr) * 2020-12-09 2022-06-16 王少斌 Sabot de secours de sonde en caoutchouc amovible annulaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511508A (en) * 1946-02-14 1950-06-13 Mcclinton John Seat for side wall sampling tools
US3150727A (en) * 1958-09-02 1964-09-29 Marion A Garrison Drill-stem core bit and wall sampler
US3598191A (en) * 1970-03-18 1971-08-10 Slimhole Sample Service Multiple unit well bore sidewall sampler tool
US4461360A (en) * 1982-03-09 1984-07-24 Standard Oil Company Bit extension guide for sidewall corer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511508A (en) * 1946-02-14 1950-06-13 Mcclinton John Seat for side wall sampling tools
US3150727A (en) * 1958-09-02 1964-09-29 Marion A Garrison Drill-stem core bit and wall sampler
US3598191A (en) * 1970-03-18 1971-08-10 Slimhole Sample Service Multiple unit well bore sidewall sampler tool
US4461360A (en) * 1982-03-09 1984-07-24 Standard Oil Company Bit extension guide for sidewall corer

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2305953B (en) * 1995-10-07 1998-11-18 Corpro Systems Ltd Method and apparatus for selective coring after logging
GB2305953A (en) * 1995-10-07 1997-04-23 Corpro Systems Ltd Selective core sampling after logging
US6349769B1 (en) 1996-03-11 2002-02-26 Schlumberger Technology Corporation Apparatus and method for establishing branch wells from a parent well
US5944107A (en) * 1996-03-11 1999-08-31 Schlumberger Technology Corporation Method and apparatus for establishing branch wells at a node of a parent well
US6056059A (en) * 1996-03-11 2000-05-02 Schlumberger Technology Corporation Apparatus and method for establishing branch wells from a parent well
US6079495A (en) * 1996-03-11 2000-06-27 Schlumberger Technology Corporation Method for establishing branch wells at a node of a parent well
US6170571B1 (en) 1996-03-11 2001-01-09 Schlumberger Technology Corporation Apparatus for establishing branch wells at a node of a parent well
US6247532B1 (en) 1996-03-11 2001-06-19 Schlumberger Technology Corporation Apparatus for establishing branch wells from a parent well
US6283216B1 (en) 1996-03-11 2001-09-04 Schlumberger Technology Corporation Apparatus and method for establishing branch wells from a parent well
EP0823534A1 (fr) * 1996-07-30 1998-02-11 Anadrill International, S.A. Dispositif permettant de réaliser des forages secondaires à partir d'un forage principal
GB2334981A (en) * 1998-03-02 1999-09-08 Bachy Soletanche Limited Underream soil testing
GB2334981B (en) * 1998-03-02 2002-07-10 Bachy Soletanche Ltd Underream soil testing
EP1537289A2 (fr) * 2002-06-10 2005-06-08 Re-Entry Technologies, Inc. Nouveau procede ameliore et appareil comprenant un guide de sortie et un laminoir a profiles combines, integres ou autre pour la deviation ou le sondage devie a partir de puits de forage existants
EP1537289A4 (fr) * 2002-06-10 2006-05-10 Re Entry Technologies Inc Nouveau procede ameliore et appareil comprenant un guide de sortie et un laminoir a profiles combines, integres ou autre pour la deviation ou le sondage devie a partir de puits de forage existants
WO2022121111A1 (fr) * 2020-12-09 2022-06-16 王少斌 Sabot de secours de sonde en caoutchouc amovible annulaire
CN112710498A (zh) * 2020-12-15 2021-04-27 浙江大学 一种深海沉积物样品转移与在线检测系统及其应用方法
CN112710498B (zh) * 2020-12-15 2021-12-10 浙江大学 一种深海沉积物样品转移与在线检测系统及其应用方法

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