NO310206B1 - Fremgangsmåte og anordning for å desentralisere en avleder ved undergrunns multilateral brönnboring og komplettering - Google Patents

Fremgangsmåte og anordning for å desentralisere en avleder ved undergrunns multilateral brönnboring og komplettering Download PDF

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Publication number
NO310206B1
NO310206B1 NO19953324A NO953324A NO310206B1 NO 310206 B1 NO310206 B1 NO 310206B1 NO 19953324 A NO19953324 A NO 19953324A NO 953324 A NO953324 A NO 953324A NO 310206 B1 NO310206 B1 NO 310206B1
Authority
NO
Norway
Prior art keywords
well flow
tubular
well
decentralizing
diverter
Prior art date
Application number
NO19953324A
Other languages
English (en)
Norwegian (no)
Other versions
NO953324D0 (no
NO953324L (no
Inventor
Jimmie Robert Williamson
John C Gano
David Lynn Reesing
Original Assignee
Halliburton Co
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 US08/296,941 external-priority patent/US5564503A/en
Application filed by Halliburton Co filed Critical Halliburton Co
Publication of NO953324D0 publication Critical patent/NO953324D0/no
Publication of NO953324L publication Critical patent/NO953324L/no
Publication of NO310206B1 publication Critical patent/NO310206B1/no

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1085—Wear protectors; Blast joints; Hard facing
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1007—Wear protectors; Centralising devices, e.g. stabilisers for the internal surface of a pipe, e.g. wear bushings for underwater well-heads
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22—Rods or pipes with helical structure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells
    • E21B23/02—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells
    • E21B23/03—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for setting the tools into, or removing the tools from, laterally offset landing nipples or pockets
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells
    • E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
    • E21B23/12—Tool diverters
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
    • E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0035—Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches
    • E21B41/0042—Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches characterised by sealing the junction between a lateral and a main bore
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L7/00—Supporting of pipes or cables inside other pipes or sleeves, e.g. for enabling pipes or cables to be inserted or withdrawn from under roads or railways without interruption of traffic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
NO19953324A 1994-08-26 1995-08-24 Fremgangsmåte og anordning for å desentralisere en avleder ved undergrunns multilateral brönnboring og komplettering NO310206B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/296,941 US5564503A (en) 1994-08-26 1994-08-26 Methods and systems for subterranean multilateral well drilling and completion
US38076895A 1995-01-30 1995-01-30

Publications (3)

Publication Number Publication Date
NO953324D0 NO953324D0 (no) 1995-08-24
NO953324L NO953324L (no) 1996-02-27
NO310206B1 true NO310206B1 (no) 2001-06-05

Family

ID=26969902

Family Applications (2)

Application Number Title Priority Date Filing Date
NO19953324A NO310206B1 (no) 1994-08-26 1995-08-24 Fremgangsmåte og anordning for å desentralisere en avleder ved undergrunns multilateral brönnboring og komplettering
NO20001342A NO322081B1 (no) 1994-08-26 2000-03-15 Foringsbossing for bruk naer en krysning mellom en hovedbronnstromningsleder og en lateral bronnboring

Family Applications After (1)

Application Number Title Priority Date Filing Date
NO20001342A NO322081B1 (no) 1994-08-26 2000-03-15 Foringsbossing for bruk naer en krysning mellom en hovedbronnstromningsleder og en lateral bronnboring

Country Status (4)

Country Link
US (2) US5566763A (de)
EP (3) EP1233144B1 (de)
CA (1) CA2156984C (de)
NO (2) NO310206B1 (de)

Families Citing this family (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6024168A (en) * 1996-01-24 2000-02-15 Weatherford/Lamb, Inc. Wellborne mills & methods
US5887655A (en) 1993-09-10 1999-03-30 Weatherford/Lamb, Inc Wellbore milling and drilling
US5787978A (en) * 1995-03-31 1998-08-04 Weatherford/Lamb, Inc. Multi-face whipstock with sacrificial face element
US5836387A (en) 1993-09-10 1998-11-17 Weatherford/Lamb, Inc. System for securing an item in a tubular channel in a wellbore
US6209636B1 (en) 1993-09-10 2001-04-03 Weatherford/Lamb, Inc. Wellbore primary barrier and related systems
US5826651A (en) 1993-09-10 1998-10-27 Weatherford/Lamb, Inc. Wellbore single trip milling
US5887668A (en) 1993-09-10 1999-03-30 Weatherford/Lamb, Inc. Wellbore milling-- drilling
US5803176A (en) 1996-01-24 1998-09-08 Weatherford/Lamb, Inc. Sidetracking operations
US6056056A (en) * 1995-03-31 2000-05-02 Durst; Douglas G. Whipstock mill
GB2312696B (en) * 1996-05-01 2000-03-29 Baker Hughes Inc Selective mono bore diverter system
US6155349A (en) 1996-05-02 2000-12-05 Weatherford/Lamb, Inc. Flexible wellbore mill
AU2003997A (en) * 1996-05-29 1997-12-04 Halliburton Energy Services, Inc. Up-to-set-lock mandrel with no-go key structure and method of operating thereof
US5833003A (en) 1996-07-15 1998-11-10 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
AU719919B2 (en) 1996-07-15 2000-05-18 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
US5730221A (en) 1996-07-15 1998-03-24 Halliburton Energy Services, Inc Methods of completing a subterranean well
US5862862A (en) 1996-07-15 1999-01-26 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
CA2210561C (en) 1996-07-15 2004-04-06 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
AU714721B2 (en) 1996-07-15 2000-01-06 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
US5813465A (en) 1996-07-15 1998-09-29 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
CA2209958A1 (en) 1996-07-15 1998-01-15 James M. Barker Apparatus for completing a subterranean well and associated methods of using same
CA2210563C (en) 1996-07-15 2004-03-02 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
WO1998009049A1 (en) * 1996-08-30 1998-03-05 Camco International, Inc. Method and apparatus to seal a junction between a lateral and a main wellbore
US6012527A (en) * 1996-10-01 2000-01-11 Schlumberger Technology Corporation Method and apparatus for drilling and re-entering multiple lateral branched in a well
US5896927A (en) * 1997-03-17 1999-04-27 Halliburton Energy Services, Inc. Stabilizing and cementing lateral well bores
US6044909A (en) * 1997-12-04 2000-04-04 Halliburton Energy Services, Inc. Apparatus and methods for locating tools in subterranean wells
US5992525A (en) * 1998-01-09 1999-11-30 Halliburton Energy Services, Inc. Apparatus and methods for deploying tools in multilateral wells
US6035937A (en) * 1998-01-27 2000-03-14 Halliburton Energy Services, Inc. Sealed lateral wellbore junction assembled downhole
US6092602A (en) * 1998-01-27 2000-07-25 Halliburton Energy Services, Inc. Sealed lateral wellbore junction assembled downhole
US6138761A (en) 1998-02-24 2000-10-31 Halliburton Energy Services, Inc. Apparatus and methods for completing a wellbore
US6073697A (en) * 1998-03-24 2000-06-13 Halliburton Energy Services, Inc. Lateral wellbore junction having displaceable casing blocking member
US6279659B1 (en) * 1998-10-20 2001-08-28 Weatherford Lamb, Inc. Assembly and method for providing a means of support and positioning for drilling multi-lateral wells and for reentry therein through a premilled window
US6095248A (en) * 1998-11-03 2000-08-01 Halliburton Energy Services, Inc. Method and apparatus for remote control of a tubing exit sleeve
US6196321B1 (en) 1999-01-29 2001-03-06 Halliburton Energy Services, Inc. Wye block having automatically aligned guide structure
US6209649B1 (en) * 1999-08-10 2001-04-03 Camco International, Inc Selective re-entry tool for multiple tubing completions and method of using
US6401815B1 (en) 2000-03-10 2002-06-11 Halliburton Energy Services, Inc. Apparatus and method for connecting casing to lateral casing using thermoset plastic molding
US6286599B1 (en) 2000-03-10 2001-09-11 Halliburton Energy Services, Inc. Method and apparatus for lateral casing window cutting using hydrajetting
US7066270B2 (en) * 2000-07-07 2006-06-27 Baker Hughes Incorporated Multilateral reference point sleeve and method of orienting a tool
US6789628B2 (en) 2002-06-04 2004-09-14 Halliburton Energy Services, Inc. Systems and methods for controlling flow and access in multilateral completions
US6935428B2 (en) 2002-08-12 2005-08-30 Halliburton Energy Services, Inc. Apparatus and methods for anchoring and orienting equipment in well casing
US9650858B2 (en) 2013-02-26 2017-05-16 Halliburton Energy Services, Inc. Resettable packer assembly and methods of using the same
US9534475B2 (en) * 2013-05-27 2017-01-03 Landmark Graphics Corporation GUI-facilitated centralizing methods and systems
US9057230B1 (en) 2014-03-19 2015-06-16 Ronald C. Parsons Expandable tubular with integral centralizers
US20160115743A1 (en) * 2014-10-23 2016-04-28 Chevron U.S.A. Inc. Modified Wellbore Casing Trajectories
WO2017209753A1 (en) * 2016-06-02 2017-12-07 Halliburton Energy Services, Inc. Multilateral intelligent completion with stackable isolation
US10428608B2 (en) * 2017-03-25 2019-10-01 Ronald Van Petegem Latch mechanism and system for downhole applications
CN107178356A (zh) * 2017-07-07 2017-09-19 北京奥瑞安能源技术开发有限公司 一种多分支水平井钻完井方法及多分支水平井
CA3087375A1 (en) 2018-01-02 2019-07-11 Saudi Arabian Oil Company Material design for the encapsulation of additives and release
JP2021508664A (ja) 2018-01-02 2021-03-11 サウジ アラビアン オイル カンパニー 封入された化学添加剤の組成物およびその調製方法
WO2023086085A1 (en) 2021-11-10 2023-05-19 Halliburton Energy Services, Inc. Debris resistant alignment system and method

Family Cites Families (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171020A (en) * 1937-12-18 1939-08-29 Peoples Finance And Thrift Com Whip stock
US2397070A (en) 1944-05-10 1946-03-19 John A Zublin Well casing for lateral bores
US2452920A (en) 1945-07-02 1948-11-02 Shell Dev Method and apparatus for drilling and producing wells
US2699920A (en) * 1952-03-14 1955-01-18 John A Zublin Apparatus for drilling laterally deviating bores from a vertical bore below a casing set therein
US2851112A (en) * 1953-10-02 1958-09-09 Phillips Petroleum Co Casing protector
US2839270A (en) * 1954-06-01 1958-06-17 Oilwell Drain Hole Drilling Co Releasable connections for drain hole drilling equipment
US2797893A (en) * 1954-09-13 1957-07-02 Oilwell Drain Hole Drilling Co Drilling and lining of drain holes
US2858107A (en) 1955-09-26 1958-10-28 Andrew J Colmerauer Method and apparatus for completing oil wells
US3330349A (en) 1964-09-11 1967-07-11 Halliburton Co Method and apparatus for multiple string completions
US3741302A (en) * 1971-09-08 1973-06-26 Brown Well Service & Supply Co Liner hanging apparatus
US3807498A (en) * 1971-12-16 1974-04-30 Camco Inc Apparatus for installing or removing a flow control device from a well tubing
US3978933A (en) * 1975-01-27 1976-09-07 Smith International, Inc. Bit-adjacent stabilizer and steel
US4369840A (en) * 1979-12-27 1983-01-25 Halliburton Company Anchor and anchor positioner assembly
US4304299A (en) * 1980-07-21 1981-12-08 Baker International Corporation Method for setting and orienting a whipstock in a well conduit
US4364430A (en) * 1980-11-24 1982-12-21 Halliburton Company Anchor positioner assembly
US4444276A (en) 1980-11-24 1984-04-24 Cities Service Company Underground radial pipe network
US4396075A (en) 1981-06-23 1983-08-02 Wood Edward T Multiple branch completion with common drilling and casing template
US4415205A (en) 1981-07-10 1983-11-15 Rehm William A Triple branch completion with separate drilling and completion templates
US4402551A (en) 1981-09-10 1983-09-06 Wood Edward T Method and apparatus to complete horizontal drain holes
US4510797A (en) * 1982-09-23 1985-04-16 Schlumberger Technology Corporation Full-bore drill stem testing apparatus with surface pressure readout
FR2551491B1 (fr) 1983-08-31 1986-02-28 Elf Aquitaine Dispositif de forage et de mise en production petroliere multidrains
US4614233A (en) * 1984-10-11 1986-09-30 Milton Menard Mechanically actuated downhole locking sub
US4921044A (en) * 1987-03-09 1990-05-01 Otis Engineering Corporation Well injection systems
US4771830A (en) * 1987-05-01 1988-09-20 Schlumberger Technology Corp. Apparatus for positioning well tools in deviated well bores
US4807704A (en) * 1987-09-28 1989-02-28 Atlantic Richfield Company System and method for providing multiple wells from a single wellbore
GB9002203D0 (en) * 1990-01-31 1990-03-28 Shell Int Research System for deflecting tfl tools
US5113938A (en) * 1991-05-07 1992-05-19 Clayton Charley H Whipstock
US5193620A (en) * 1991-08-05 1993-03-16 Tiw Corporation Whipstock setting method and apparatus
FR2692315B1 (fr) * 1992-06-12 1994-09-02 Inst Francais Du Petrole Système et méthode de forage et d'équipement d'un puits latéral, application à l'exploitation de gisement pétrolier.
US5353876A (en) * 1992-08-07 1994-10-11 Baker Hughes Incorporated Method and apparatus for sealing the juncture between a verticle well and one or more horizontal wells using mandrel means
US5388648A (en) * 1993-10-08 1995-02-14 Baker Hughes Incorporated Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means

Also Published As

Publication number Publication date
EP1233144A3 (de) 2002-09-04
EP1233144A2 (de) 2002-08-21
US5566763A (en) 1996-10-22
EP0701042A3 (de) 1998-05-06
CA2156984C (en) 2001-04-10
EP0701042A2 (de) 1996-03-13
NO953324D0 (no) 1995-08-24
EP1233142A2 (de) 2002-08-21
CA2156984A1 (en) 1996-02-27
NO953324L (no) 1996-02-27
EP1233144B1 (de) 2005-12-28
EP1233142A3 (de) 2002-09-04
NO322081B1 (no) 2006-08-14
NO20001342L (no) 1996-02-27
US5613559A (en) 1997-03-25
NO20001342D0 (no) 2000-03-15
EP0701042B1 (de) 2003-04-02

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