NO964942L - Fremgangsmåte ved sideveis boring - Google Patents

Fremgangsmåte ved sideveis boring

Info

Publication number
NO964942L
NO964942L NO964942A NO964942A NO964942L NO 964942 L NO964942 L NO 964942L NO 964942 A NO964942 A NO 964942A NO 964942 A NO964942 A NO 964942A NO 964942 L NO964942 L NO 964942L
Authority
NO
Norway
Prior art keywords
procedure
lateral drilling
casing
pipe
opening
Prior art date
Application number
NO964942A
Other languages
English (en)
Norwegian (no)
Other versions
NO964942D0 (no
Inventor
Michael Burl Smith
Original Assignee
Atlantic Richfield 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
Application filed by Atlantic Richfield Co filed Critical Atlantic Richfield Co
Publication of NO964942L publication Critical patent/NO964942L/no
Publication of NO964942D0 publication Critical patent/NO964942D0/no

Links

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
    • 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
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
    • E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Earth Drilling (AREA)
NO964942A 1994-05-25 1996-11-21 Fremgangsmåte ved sideveis boring NO964942D0 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08248972 US5435400B1 (en) 1994-05-25 1994-05-25 Lateral well drilling
PCT/GB1995/001047 WO1995032353A1 (en) 1994-05-25 1995-05-10 Lateral drilling method

Publications (2)

Publication Number Publication Date
NO964942L true NO964942L (no) 1996-11-21
NO964942D0 NO964942D0 (no) 1996-11-21

Family

ID=22941491

Family Applications (1)

Application Number Title Priority Date Filing Date
NO964942A NO964942D0 (no) 1994-05-25 1996-11-21 Fremgangsmåte ved sideveis boring

Country Status (6)

Country Link
US (1) US5435400B1 (de)
EP (1) EP0760895B1 (de)
CA (1) CA2191076A1 (de)
DE (1) DE69505523T2 (de)
NO (1) NO964942D0 (de)
WO (1) WO1995032353A1 (de)

Families Citing this family (110)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5727629A (en) 1996-01-24 1998-03-17 Weatherford/Lamb, Inc. Wellbore milling guide and method
US5887655A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc Wellbore milling and drilling
US6070665A (en) * 1996-05-02 2000-06-06 Weatherford/Lamb, Inc. Wellbore milling
US6202752B1 (en) 1993-09-10 2001-03-20 Weatherford/Lamb, Inc. Wellbore milling methods
US5887668A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc. Wellbore milling-- drilling
US5485889A (en) * 1994-07-25 1996-01-23 Sidekick Tools Inc. Steering drill bit while drilling a bore hole
US5803176A (en) 1996-01-24 1998-09-08 Weatherford/Lamb, Inc. Sidetracking operations
US5791417A (en) 1995-09-22 1998-08-11 Weatherford/Lamb, Inc. Tubular window formation
US5720356A (en) * 1996-02-01 1998-02-24 Gardes; Robert Method and system for drilling underbalanced radial wells utilizing a dual string technique in a live well
US6457540B2 (en) 1996-02-01 2002-10-01 Robert Gardes Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings
US7185718B2 (en) * 1996-02-01 2007-03-06 Robert Gardes Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings
US6547006B1 (en) 1996-05-02 2003-04-15 Weatherford/Lamb, Inc. Wellbore liner system
US6155349A (en) * 1996-05-02 2000-12-05 Weatherford/Lamb, Inc. Flexible wellbore mill
AU719919B2 (en) 1996-07-15 2000-05-18 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
US5833003A (en) 1996-07-15 1998-11-10 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
US5730221A (en) 1996-07-15 1998-03-24 Halliburton Energy Services, Inc Methods of completing a subterranean well
AU714721B2 (en) 1996-07-15 2000-01-06 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
NO313763B1 (no) 1996-07-15 2002-11-25 Halliburton Energy Serv Inc Fremgangsmåte ved reetablering av adgang til en brönnboring og styredel til bruk ved tildannelse av en åpning i en brönnfôring
US5862862A (en) 1996-07-15 1999-01-26 Halliburton Energy Services, Inc. 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
GB9714651D0 (en) 1997-07-12 1997-09-17 Petroline Wellsystems Ltd Downhole tubing
US6536520B1 (en) 2000-04-17 2003-03-25 Weatherford/Lamb, Inc. Top drive casing system
US6425448B1 (en) 2001-01-30 2002-07-30 Cdx Gas, L.L.P. Method and system for accessing subterranean zones from a limited surface area
US6708764B2 (en) 2002-07-12 2004-03-23 Cdx Gas, L.L.C. Undulating well bore
US6681855B2 (en) 2001-10-19 2004-01-27 Cdx Gas, L.L.C. Method and system for management of by-products from subterranean zones
US7025154B2 (en) 1998-11-20 2006-04-11 Cdx Gas, Llc Method and system for circulating fluid in a well system
US6598686B1 (en) 1998-11-20 2003-07-29 Cdx Gas, Llc Method and system for enhanced access to a subterranean zone
US6280000B1 (en) 1998-11-20 2001-08-28 Joseph A. Zupanick Method for production of gas from a coal seam using intersecting well bores
US7048049B2 (en) 2001-10-30 2006-05-23 Cdx Gas, Llc Slant entry well system and method
US6662870B1 (en) 2001-01-30 2003-12-16 Cdx Gas, L.L.C. Method and system for accessing subterranean deposits from a limited surface area
US8297377B2 (en) 1998-11-20 2012-10-30 Vitruvian Exploration, Llc Method and system for accessing subterranean deposits from the surface and tools therefor
US6679322B1 (en) 1998-11-20 2004-01-20 Cdx Gas, Llc Method and system for accessing subterranean deposits from the surface
US8376052B2 (en) 1998-11-20 2013-02-19 Vitruvian Exploration, Llc Method and system for surface production of gas from a subterranean zone
WO2000037773A1 (en) 1998-12-22 2000-06-29 Weatherford/Lamb, Inc. Downhole sealing for production tubing
EP2273064A1 (de) 1998-12-22 2011-01-12 Weatherford/Lamb, Inc. Verfahren und Geräte zur Profilierung und Verbindung von Leitungen
US6276453B1 (en) 1999-01-12 2001-08-21 Lesley O. Bond Method and apparatus for forcing an object through the sidewall of a borehole
MY121129A (en) * 1999-02-01 2005-12-30 Shell Int Research Method for creating secondary sidetracks in a well system
US6374918B2 (en) 1999-05-14 2002-04-23 Weatherford/Lamb, Inc. In-tubing wellbore sidetracking operations
US6260623B1 (en) 1999-07-30 2001-07-17 Kmk Trust Apparatus and method for utilizing flexible tubing with lateral bore holes
US7373990B2 (en) * 1999-12-22 2008-05-20 Weatherford/Lamb, Inc. Method and apparatus for expanding and separating tubulars in a wellbore
US6695063B2 (en) 1999-12-22 2004-02-24 Weatherford/Lamb, Inc. Expansion assembly for a tubular expander tool, and method of tubular expansion
US6708769B2 (en) 2000-05-05 2004-03-23 Weatherford/Lamb, Inc. Apparatus and methods for forming a lateral wellbore
US6598678B1 (en) * 1999-12-22 2003-07-29 Weatherford/Lamb, Inc. Apparatus and methods for separating and joining tubulars in a wellbore
US6752215B2 (en) 1999-12-22 2004-06-22 Weatherford/Lamb, Inc. Method and apparatus for expanding and separating tubulars in a wellbore
US6578630B2 (en) 1999-12-22 2003-06-17 Weatherford/Lamb, Inc. Apparatus and methods for expanding tubulars in a wellbore
US8746028B2 (en) * 2002-07-11 2014-06-10 Weatherford/Lamb, Inc. Tubing expansion
US6698517B2 (en) 1999-12-22 2004-03-02 Weatherford/Lamb, Inc. Apparatus, methods, and applications for expanding tubulars in a wellbore
GB2364079B (en) * 2000-06-28 2004-11-17 Renovus Ltd Drill bits
GB0023032D0 (en) 2000-09-20 2000-11-01 Weatherford Lamb Downhole apparatus
US6845820B1 (en) * 2000-10-19 2005-01-25 Weatherford/Lamb, Inc. Completion apparatus and methods for use in hydrocarbon wells
US7121351B2 (en) * 2000-10-25 2006-10-17 Weatherford/Lamb, Inc. Apparatus and method for completing a wellbore
US7090025B2 (en) * 2000-10-25 2006-08-15 Weatherford/Lamb, Inc. Methods and apparatus for reforming and expanding tubulars in a wellbore
GB0026063D0 (en) 2000-10-25 2000-12-13 Weatherford Lamb Downhole tubing
GB0028041D0 (en) 2000-11-17 2001-01-03 Weatherford Lamb Expander
GB2389606B (en) * 2000-12-22 2005-06-29 E2Tech Ltd Method and apparatus for downhole remedial or repair operations
US6662876B2 (en) * 2001-03-27 2003-12-16 Weatherford/Lamb, Inc. Method and apparatus for downhole tubular expansion
CN1260458C (zh) * 2001-04-23 2006-06-21 国际壳牌研究有限公司 短半径分支井眼的钻井方法
US6419020B1 (en) * 2001-04-24 2002-07-16 Ben Spingath Hydraulic drilling method and system for forming radial drain holes in underground oil and gas bearing formations
US6510896B2 (en) 2001-05-04 2003-01-28 Weatherford/Lamb, Inc. Apparatus and methods for utilizing expandable sand screen in wellbores
GB0114872D0 (en) 2001-06-19 2001-08-08 Weatherford Lamb Tubing expansion
US6550539B2 (en) 2001-06-20 2003-04-22 Weatherford/Lamb, Inc. Tie back and method for use with expandable tubulars
US6655459B2 (en) * 2001-07-30 2003-12-02 Weatherford/Lamb, Inc. Completion apparatus and methods for use in wellbores
US6612481B2 (en) 2001-07-30 2003-09-02 Weatherford/Lamb, Inc. Wellscreen
GB0119977D0 (en) * 2001-08-16 2001-10-10 E2 Tech Ltd Apparatus and method
US6591905B2 (en) 2001-08-23 2003-07-15 Weatherford/Lamb, Inc. Orienting whipstock seat, and method for seating a whipstock
US6752216B2 (en) 2001-08-23 2004-06-22 Weatherford/Lamb, Inc. Expandable packer, and method for seating an expandable packer
US6688395B2 (en) 2001-11-02 2004-02-10 Weatherford/Lamb, Inc. Expandable tubular having improved polished bore receptacle protection
US6585053B2 (en) 2001-09-07 2003-07-01 Weatherford/Lamb, Inc. Method for creating a polished bore receptacle
US7156179B2 (en) * 2001-09-07 2007-01-02 Weatherford/Lamb, Inc. Expandable tubulars
US6691789B2 (en) 2001-09-10 2004-02-17 Weatherford/Lamb, Inc. Expandable hanger and packer
US6688399B2 (en) 2001-09-10 2004-02-10 Weatherford/Lamb, Inc. Expandable hanger and packer
US6932161B2 (en) 2001-09-26 2005-08-23 Weatherford/Lams, Inc. Profiled encapsulation for use with instrumented expandable tubular completions
US6877553B2 (en) * 2001-09-26 2005-04-12 Weatherford/Lamb, Inc. Profiled recess for instrumented expandable components
US6629567B2 (en) 2001-12-07 2003-10-07 Weatherford/Lamb, Inc. Method and apparatus for expanding and separating tubulars in a wellbore
GB0130849D0 (en) * 2001-12-22 2002-02-06 Weatherford Lamb Bore liner
US6722441B2 (en) 2001-12-28 2004-04-20 Weatherford/Lamb, Inc. Threaded apparatus for selectively translating rotary expander tool downhole
US6729296B2 (en) * 2002-02-22 2004-05-04 Matthew Brandon King Variable vane rotary engine
US6668930B2 (en) 2002-03-26 2003-12-30 Weatherford/Lamb, Inc. Method for installing an expandable coiled tubing patch
US6742598B2 (en) 2002-05-29 2004-06-01 Weatherford/Lamb, Inc. Method of expanding a sand screen
US6725922B2 (en) 2002-07-12 2004-04-27 Cdx Gas, Llc Ramping well bores
US6991048B2 (en) * 2002-07-12 2006-01-31 Cdx Gas, Llc Wellbore plug system and method
US7730965B2 (en) 2002-12-13 2010-06-08 Weatherford/Lamb, Inc. Retractable joint and cementing shoe for use in completing a wellbore
US6820687B2 (en) 2002-09-03 2004-11-23 Weatherford/Lamb, Inc. Auto reversing expanding roller system
GB0220933D0 (en) * 2002-09-10 2002-10-23 Weatherford Lamb Tubing expansion tool
US8333245B2 (en) 2002-09-17 2012-12-18 Vitruvian Exploration, Llc Accelerated production of gas from a subterranean zone
US7182141B2 (en) 2002-10-08 2007-02-27 Weatherford/Lamb, Inc. Expander tool for downhole use
US7017682B2 (en) * 2002-12-17 2006-03-28 Vetco Gray Inc. Drill string shutoff valve
US6918452B2 (en) * 2002-12-17 2005-07-19 Vetco Gray Inc. Drill string shutoff valve
US20040118571A1 (en) * 2002-12-19 2004-06-24 Lauritzen J. Eric Expansion assembly for a tubular expander tool, and method of tubular expansion
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
US20040231843A1 (en) * 2003-05-22 2004-11-25 Simpson Nell A. A. Lubricant for use in a wellbore
GB0315997D0 (en) * 2003-07-09 2003-08-13 Weatherford Lamb Expanding tubing
US7650944B1 (en) 2003-07-11 2010-01-26 Weatherford/Lamb, Inc. Vessel for well intervention
GB2424432B (en) 2005-02-28 2010-03-17 Weatherford Lamb Deep water drilling with casing
CA2555563C (en) * 2005-08-05 2009-03-31 Weatherford/Lamb, Inc. Apparatus and methods for creation of down hole annular barrier
US7503396B2 (en) * 2006-02-15 2009-03-17 Weatherford/Lamb Method and apparatus for expanding tubulars in a wellbore
US7857052B2 (en) 2006-05-12 2010-12-28 Weatherford/Lamb, Inc. Stage cementing methods used in casing while drilling
US8276689B2 (en) 2006-05-22 2012-10-02 Weatherford/Lamb, Inc. Methods and apparatus for drilling with casing
US8167060B2 (en) * 2007-10-22 2012-05-01 Charles Brunet Apparatus and method for conveyance and control of a high pressure hose in jet drilling operations
US7647989B2 (en) * 2008-06-02 2010-01-19 Vetco Gray Inc. Backup safety flow control system for concentric drill string
NO335689B1 (no) 2012-02-17 2015-01-19 Hydra Systems As Fremgangsmåte ved etablering av en ny brønnbane fra en eksisterende brønn
US20140360723A1 (en) * 2013-06-07 2014-12-11 Smith International, Inc. Protective sheath through a casing window
NO339191B1 (no) 2013-09-06 2016-11-14 Hydra Systems As Fremgangsmåte for isolering av en permeabel sone i en underjordisk brønn
WO2015051414A1 (en) * 2013-10-09 2015-04-16 Wds (Oil & Gas) Pty Ltd A wedge assembly and method
US10487634B2 (en) * 2017-09-29 2019-11-26 Titan Oil Recovery, Inc. Enhancing the effects of a low-pressure zone surrounding a well bore via radial drilling by increasing the contact zone for resident microbial enhanced oil recovery
RU2742087C1 (ru) * 2020-07-22 2021-02-02 Публичное акционерное общество «Татнефть» имени В.Д. Шашина Способ строительства многоствольной скважины
US11608686B2 (en) * 2021-02-12 2023-03-21 Saudi Arabian Oil Company Whipstock assemblies and methods for using the same
US20240084676A1 (en) * 2022-09-08 2024-03-14 Saudi Arabian Oil Company Method for downhole chemical storage for well mitigation and reservoir treatments

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2173035A (en) * 1938-02-16 1939-09-12 Security Engineering Co Inc Method of sidetracking wells
US3289760A (en) * 1964-02-10 1966-12-06 Kammerer Jr Archer W Method and apparatus for cementing and conditioning bore holes
US4397360A (en) * 1981-07-06 1983-08-09 Atlantic Richfield Company Method for forming drain holes from a cased well
MX159238A (es) * 1982-07-26 1989-05-08 Dickinson Ben Wade O Iii Mejoras en aparato perforador del suelo,por ejemplo para pozos petroleros
MX160919A (es) * 1985-12-19 1990-06-19 Dickinson Ben Wade O Iii Aparato perforador de pozos en la tierra y metodo para formarlo
US4852666A (en) * 1988-04-07 1989-08-01 Brunet Charles G Apparatus for and a method of drilling offset wells for producing hydrocarbons
DE3902869C1 (de) * 1989-02-01 1990-04-12 Eastman Christensen Co., Salt Lake City, Utah, Us
US4890675A (en) * 1989-03-08 1990-01-02 Dew Edward G Horizontal drilling through casing window
US5154231A (en) * 1990-09-19 1992-10-13 Masx Energy Services Group, Inc. Whipstock assembly with hydraulically set anchor
US5115872A (en) * 1990-10-19 1992-05-26 Anglo Suisse, Inc. Directional drilling system and method for drilling precise offset wellbores from a main wellbore
US5195591A (en) * 1991-08-30 1993-03-23 Atlantic Richfield Company Permanent whipstock and placement method
US5211715A (en) * 1991-08-30 1993-05-18 Atlantic Richfield Company Coring with tubing run tools from a producing well
US5215151A (en) * 1991-09-26 1993-06-01 Cudd Pressure Control, Inc. Method and apparatus for drilling bore holes under pressure
US5318121A (en) * 1992-08-07 1994-06-07 Baker Hughes Incorporated Method and apparatus for locating and re-entering one or more horizontal wells using whipstock with sealable bores
US5277251A (en) * 1992-10-09 1994-01-11 Blount Curtis G Method for forming a window in a subsurface well conduit
AU5408294A (en) * 1992-10-19 1994-05-09 Baker Hughes Incorporated Retrievable whipstock system
US5287921A (en) * 1993-01-11 1994-02-22 Blount Curtis G Method and apparatus for setting a whipstock
US5413184A (en) * 1993-10-01 1995-05-09 Landers; Carl Method of and apparatus for horizontal well drilling

Also Published As

Publication number Publication date
EP0760895B1 (de) 1998-10-21
CA2191076A1 (en) 1995-11-30
DE69505523T2 (de) 1999-05-20
WO1995032353A1 (en) 1995-11-30
DE69505523D1 (de) 1998-11-26
EP0760895A1 (de) 1997-03-12
NO964942D0 (no) 1996-11-21
US5435400B1 (en) 1999-06-01
US5435400A (en) 1995-07-25

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