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BR9714732A - Sistema para a perfuração e conclusão de poços multilaterais - Google Patents

Sistema para a perfuração e conclusão de poços multilaterais

Info

Publication number
BR9714732A
BR9714732A BR9714732-0A BR9714732A BR9714732A BR 9714732 A BR9714732 A BR 9714732A BR 9714732 A BR9714732 A BR 9714732A BR 9714732 A BR9714732 A BR 9714732A
Authority
BR
Brazil
Prior art keywords
section
window
conveyor
conveyor section
pipes
Prior art date
Application number
BR9714732-0A
Other languages
English (en)
Inventor
David Wayne Allen
Original Assignee
Phillips Petroleum 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 Phillips Petroleum Co filed Critical Phillips Petroleum Co
Priority to BR9714732-0A priority Critical patent/BR9714732A/pt
Publication of BR9714732A publication Critical patent/BR9714732A/pt

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/30Specific pattern of wells, e.g. optimising the spacing of wells
    • E21B43/305Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0035Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches
    • E21B41/0042Apparatus 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
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/10Setting of casings, screens, liners or the like in wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/14Obtaining from a multiple-zone well
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/04Directional drilling
    • E21B7/06Deflecting the direction of boreholes
    • E21B7/061Deflecting 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)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

Patente de Invenção: <B>"SISTEMA PARA PERFURAçãO E CONCLUSãO DE POçOS MULTILATERAIS"<D>. O tempo necessário para o estabelecimento de um poço multi-lateral é reduzido ao se aumentar uma seção de um furo de poço e correr uma ferramenta multilateral (7) que inclui uma combinação pré-montada de seções de revestimento que formam tubagens de revestimento duplas que se estendem a partir do revestimento primário. A ferramenta multilateral (7) incorpora uma seção de transportador (2), uma seção lateral (8), e uma seção principal (5). A ferramenta é corrida com a seção lateral (8) presa de modo a poder se soltar em alinhamento coaxial dentro da seção de transportador (2), e com a seção principal (5) presa na extremidade inferior da seção de transportador (2). Uma vez no lugar, a seção lateral (8) é solta e desviada de uma janela pré-formada (4) na extremidade inferior da seção de transportador (2) e corre de modo geral paralela à seção de revestimento principal (5). Uma junção lateral é assim formada na janela de seção de transportador (4) na qual as tubagens de revestimento duplas são conectadas ao revestimento primário. Uma segunda janela, pré-formada na extremidade superior da seção lateral (8) fica alinhada com o furo do revestimento primário quando a seção de revestimento lateral está totalmente estendida para fora da janela de seção de transportador (4), possibilitando, desta maneira, a recuperação de um dispositivo de desvio incorporado na seção de revestimento de transportador (2) através da segunda janela. As tubagens duplas são em seguida individualmente perfuradas e concluídas com uma integridade de pressão entre as tubagens duplas mantidas por meio da utilização de um equipamento de apoio através da junção lateral.
BR9714732-0A 1997-06-09 1997-06-09 Sistema para a perfuração e conclusão de poços multilaterais BR9714732A (pt)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR9714732-0A BR9714732A (pt) 1997-06-09 1997-06-09 Sistema para a perfuração e conclusão de poços multilaterais

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR9714732-0A BR9714732A (pt) 1997-06-09 1997-06-09 Sistema para a perfuração e conclusão de poços multilaterais
PCT/US1997/009995 WO1998057031A1 (en) 1997-06-09 1997-06-09 System for drilling and completing multilateral wells

Publications (1)

Publication Number Publication Date
BR9714732A true BR9714732A (pt) 2000-07-25

Family

ID=22261054

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9714732-0A BR9714732A (pt) 1997-06-09 1997-06-09 Sistema para a perfuração e conclusão de poços multilaterais

Country Status (10)

Country Link
US (1) US6047774A (pt)
EP (2) EP1686236A1 (pt)
AU (1) AU731442B2 (pt)
BR (1) BR9714732A (pt)
CA (1) CA2293427C (pt)
DE (1) DE69736442T2 (pt)
DK (1) DK1042587T3 (pt)
GB (2) GB2322147B (pt)
NO (1) NO318147B1 (pt)
WO (1) WO1998057031A1 (pt)

Families Citing this family (88)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6283208B1 (en) * 1997-09-05 2001-09-04 Schlumberger Technology Corp. Orienting tool and method
US6712154B2 (en) 1998-11-16 2004-03-30 Enventure Global Technology Isolation of subterranean zones
US7231985B2 (en) 1998-11-16 2007-06-19 Shell Oil Company Radial expansion of tubular members
CA2407983C (en) 1998-11-16 2010-01-12 Robert Lance Cook Radial expansion of tubular members
US6745845B2 (en) * 1998-11-16 2004-06-08 Shell Oil Company Isolation of subterranean zones
US7357188B1 (en) 1998-12-07 2008-04-15 Shell Oil Company Mono-diameter wellbore casing
US6575240B1 (en) 1998-12-07 2003-06-10 Shell Oil Company System and method for driving pipe
US7603758B2 (en) 1998-12-07 2009-10-20 Shell Oil Company Method of coupling a tubular member
US6634431B2 (en) 1998-11-16 2003-10-21 Robert Lance Cook Isolation of subterranean zones
US7121352B2 (en) 1998-11-16 2006-10-17 Enventure Global Technology Isolation of subterranean zones
US6823937B1 (en) 1998-12-07 2004-11-30 Shell Oil Company Wellhead
US6557640B1 (en) * 1998-12-07 2003-05-06 Shell Oil Company Lubrication and self-cleaning system for expansion mandrel
US7363984B2 (en) 1998-12-07 2008-04-29 Enventure Global Technology, Llc System for radially expanding a tubular member
GB2344606B (en) * 1998-12-07 2003-08-13 Shell Int Research Forming a wellbore casing by expansion of a tubular member
US6725919B2 (en) 1998-12-07 2004-04-27 Shell Oil Company Forming a wellbore casing while simultaneously drilling a wellbore
GB2356651B (en) 1998-12-07 2004-02-25 Shell Int Research Lubrication and self-cleaning system for expansion mandrel
US7185710B2 (en) 1998-12-07 2007-03-06 Enventure Global Technology Mono-diameter wellbore casing
US7195064B2 (en) 1998-12-07 2007-03-27 Enventure Global Technology Mono-diameter wellbore casing
US7552776B2 (en) 1998-12-07 2009-06-30 Enventure Global Technology, Llc Anchor hangers
AU770359B2 (en) 1999-02-26 2004-02-19 Shell Internationale Research Maatschappij B.V. Liner hanger
US7055608B2 (en) 1999-03-11 2006-06-06 Shell Oil Company Forming a wellbore casing while simultaneously drilling a wellbore
CA2306656C (en) 1999-04-26 2006-06-06 Shell Internationale Research Maatschappij B.V. Expandable connector for borehole tubes
US7350563B2 (en) 1999-07-09 2008-04-01 Enventure Global Technology, L.L.C. System for lining a wellbore casing
US6209649B1 (en) 1999-08-10 2001-04-03 Camco International, Inc Selective re-entry tool for multiple tubing completions and method of using
CA2389094C (en) 1999-11-01 2008-08-19 Shell Oil Company Wellbore casing repair by tubing expansion
US7234531B2 (en) 1999-12-03 2007-06-26 Enventure Global Technology, Llc Mono-diameter wellbore casing
GB2363142B (en) * 2000-05-22 2004-11-10 Smith International Downhole lateral completion system
US7100684B2 (en) 2000-07-28 2006-09-05 Enventure Global Technology Liner hanger with standoffs
GB2387861B (en) 2000-09-18 2005-03-02 Shell Int Research Forming a wellbore casing
WO2002029199A1 (en) 2000-10-02 2002-04-11 Shell Oil Company Method and apparatus for casing expansion
US7100685B2 (en) 2000-10-02 2006-09-05 Enventure Global Technology Mono-diameter wellbore casing
US6752211B2 (en) * 2000-11-10 2004-06-22 Smith International, Inc. Method and apparatus for multilateral junction
CA2428819A1 (en) 2001-01-03 2002-07-11 Enventure Global Technology Mono-diameter wellbore casing
US7410000B2 (en) 2001-01-17 2008-08-12 Enventure Global Technology, Llc. Mono-diameter wellbore casing
GB2392185B (en) * 2001-04-23 2005-08-03 Shell Int Research Method of drilling an ultra-short radius borehole
US7290616B2 (en) 2001-07-06 2007-11-06 Enventure Global Technology, L.L.C. Liner hanger
GB2394979B (en) 2001-07-06 2005-11-02 Eventure Global Technology Liner hanger
US7258168B2 (en) 2001-07-27 2007-08-21 Enventure Global Technology L.L.C. Liner hanger with slip joint sealing members and method of use
WO2003023178A2 (en) 2001-09-07 2003-03-20 Enventure Global Technology Adjustable expansion cone assembly
WO2004094766A2 (en) 2003-04-17 2004-11-04 Enventure Global Technology Apparatus for radially expanding and plastically deforming a tubular member
WO2004081346A2 (en) 2003-03-11 2004-09-23 Enventure Global Technology Apparatus for radially expanding and plastically deforming a tubular member
GB2422859B (en) 2001-11-12 2006-12-13 Enventure Global Technology Collapsible expansion cone
GB2401893B (en) 2001-12-27 2005-07-13 Enventure Global Technology Seal receptacle using expandable liner hanger
WO2004018824A2 (en) 2002-08-23 2004-03-04 Enventure Global Technology Magnetic impulse applied sleeve method of forming a wellbore casing
WO2003086675A2 (en) 2002-04-12 2003-10-23 Enventure Global Technology Protective sleeve for threaded connections for expandable liner hanger
AU2003202266A1 (en) 2002-02-15 2003-09-09 Enventure Global Technology Mono-diameter wellbore casing
EP1501645A4 (en) 2002-04-15 2006-04-26 Enventure Global Technology PROTECTIVE SLEEVE FOR THE THREADED CONNECTIONS OF A EXPANSIBLE LOST EXPANSIBLE TUBING COLLAR SUSPENSION DEVICE
AU2003225001A1 (en) 2002-05-29 2003-12-19 Eventure Global Technology System for radially expanding a tubular member
GB2418941B (en) 2002-06-10 2006-09-06 Enventure Global Technology Mono diameter wellbore casing
US6848504B2 (en) * 2002-07-26 2005-02-01 Charles G. Brunet Apparatus and method to complete a multilateral junction
AU2003259865A1 (en) 2002-08-23 2004-03-11 Enventure Global Technology Interposed joint sealing layer method of forming a wellbore casing
US9366086B2 (en) 2002-08-30 2016-06-14 Technology Ventures International Limited Method of forming a bore
US9347272B2 (en) * 2002-08-30 2016-05-24 Technology Ventures International Limited Method and assembly for forming a supported bore using a first and second drill bit
AU2003263859A1 (en) 2002-09-20 2004-04-08 Enventure Global Technology Protective sleeve for expandable tubulars
CA2499007C (en) 2002-09-20 2012-08-07 Enventure Global Technology Bottom plug for forming a mono diameter wellbore casing
AU2003263852A1 (en) 2002-09-20 2004-04-08 Enventure Global Technology Self-lubricating expansion mandrel for expandable tubular
AU2003265452A1 (en) 2002-09-20 2004-04-08 Enventure Global Technology Pipe formability evaluation for expandable tubulars
US7051917B2 (en) 2002-11-05 2006-05-30 Simmons Robert J Beam end weld preparation
US6923274B2 (en) * 2003-01-02 2005-08-02 Weatherford/Lamb, Inc. Retrievable pre-milled window with deflector
US7886831B2 (en) 2003-01-22 2011-02-15 Enventure Global Technology, L.L.C. Apparatus for radially expanding and plastically deforming a tubular member
GB2433281B (en) 2003-01-27 2007-08-01 Enventure Global Technology Lubrication system for radially expanding tubular members
CA2418565A1 (en) * 2003-02-10 2004-08-10 Kevin Kowbel Apparatus, system and method for providing a downhole junction
GB2429996B (en) 2003-02-26 2007-08-29 Enventure Global Technology Apparatus for radially expanding and plastically deforming a tubular member
WO2004081333A2 (en) * 2003-03-10 2004-09-23 Exxonmobil Upstream Research Company A method and apparatus for a downhole excavation in a wellbore
US20050166387A1 (en) 2003-06-13 2005-08-04 Cook Robert L. Method and apparatus for forming a mono-diameter wellbore casing
US7712522B2 (en) 2003-09-05 2010-05-11 Enventure Global Technology, Llc Expansion cone and system
US7207390B1 (en) 2004-02-05 2007-04-24 Cdx Gas, Llc Method and system for lining multilateral wells
US7819185B2 (en) 2004-08-13 2010-10-26 Enventure Global Technology, Llc Expandable tubular
WO2006023657A2 (en) * 2004-08-17 2006-03-02 Sesqui Mining Llc Methods for constructing underground borehole configurations and related solution mining methods
US7373984B2 (en) 2004-12-22 2008-05-20 Cdx Gas, Llc Lining well bore junctions
US7299864B2 (en) * 2004-12-22 2007-11-27 Cdx Gas, Llc Adjustable window liner
US8256535B2 (en) * 2008-12-11 2012-09-04 Conocophillips Company Mill-through tailpipe liner exit and method of use thereof
US9371694B2 (en) * 2009-06-08 2016-06-21 Conocophillips Company Permanent bypass whipstock assembly for drilling and completing a sidetrack well and preserving access to the original wellbore
WO2013126685A1 (en) 2012-02-24 2013-08-29 Advanced Technology Materials, Inc. Fluid delivery system and method
US20140182834A1 (en) * 2013-01-02 2014-07-03 Era Exploration LLC System for developing high pressure shale or tight rock formations using a profusion of open hole sinusoidal laterals
US9493988B2 (en) * 2013-03-01 2016-11-15 Baker Hughes Incorporated String supported whipstock for multiple laterals in a single trip and related method
US10053940B2 (en) 2013-11-08 2018-08-21 Halliburton Energy Services, Inc. Pre-milled windows having a composite material covering
MX2016008019A (es) 2014-01-15 2017-05-12 Halliburton Energy Services Inc Montaje de derivacion de pozo con dispositivo de sello anular con presion sustancialmente equilibrada.
AU2014415639B2 (en) 2014-12-29 2018-06-14 Halliburton Energy Services, Inc. Multilateral junction with wellbore isolation
US10655433B2 (en) 2014-12-29 2020-05-19 Halliburton Energy Services, Inc. Multilateral junction with wellbore isolation using degradable isolation components
CA2950525C (en) * 2015-03-02 2018-09-11 Allan Albertson Multilateral well system and method
CN108397137A (zh) * 2018-03-01 2018-08-14 中国海洋石油集团有限公司 一种造斜工具及其制造方法
US10422210B1 (en) 2018-05-04 2019-09-24 Sesqui Mining, Llc. Trona solution mining methods and compositions
CA3114610C (en) * 2018-11-29 2024-01-09 Halliburton Energy Services, Inc. Combined multilateral window and deflector and junction system
GB2604487B (en) 2019-12-10 2024-03-27 Halliburton Energy Services Inc Downhole tool with a releasable shroud at a downhole tip thereof
NO20220849A1 (en) * 2020-02-03 2022-08-03 Schlumberger Technology Bv Multilateral intelligent well completion methodology and system
US12129741B2 (en) 2021-02-22 2024-10-29 Conocophillips Company Method and apparatus for making a lateral well
CN114718535B (zh) * 2022-03-22 2023-09-01 太原理工大学 一种利用高压气体反向解堵煤层气井的方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396075A (en) * 1981-06-23 1983-08-02 Wood Edward T Multiple branch completion with common drilling and casing template
US4807704A (en) * 1987-09-28 1989-02-28 Atlantic Richfield Company System and method for providing multiple wells from a single wellbore
US5474131A (en) * 1992-08-07 1995-12-12 Baker Hughes Incorporated Method for completing multi-lateral wells and maintaining selective re-entry into laterals
US5462120A (en) * 1993-01-04 1995-10-31 S-Cal Research Corp. Downhole equipment, tools and assembly procedures for the drilling, tie-in and completion of vertical cased oil wells connected to liner-equipped multiple drainholes
US5564503A (en) * 1994-08-26 1996-10-15 Halliburton Company Methods and systems for subterranean multilateral well drilling and completion
US5526880A (en) * 1994-09-15 1996-06-18 Baker Hughes Incorporated Method for multi-lateral completion and cementing the juncture with lateral wellbores
US5477925A (en) * 1994-12-06 1995-12-26 Baker Hughes Incorporated Method for multi-lateral completion and cementing the juncture with lateral wellbores
FR2737534B1 (fr) * 1995-08-04 1997-10-24 Drillflex Dispositif de chemisage d'une bifurcation d'un puits, notamment de forage petrolier, ou d'une canalisation, et procede de mise en oeuvre de ce dispositif
US5787987A (en) * 1995-09-06 1998-08-04 Baker Hughes Incorporated Lateral seal and control system
US5680901A (en) * 1995-12-14 1997-10-28 Gardes; Robert Radial tie back assembly for directional drilling
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

Also Published As

Publication number Publication date
CA2293427A1 (en) 1998-12-17
NO318147B1 (no) 2005-02-07
GB2322147B (en) 1999-09-15
AU731442B2 (en) 2001-03-29
NO996092L (no) 2000-02-09
GB2327964B (en) 1999-09-08
EP1042587A1 (en) 2000-10-11
DK1042587T3 (da) 2006-11-27
CA2293427C (en) 2003-09-30
DE69736442T2 (de) 2007-03-29
GB9825306D0 (en) 1999-01-13
EP1042587B1 (en) 2006-08-02
GB2322147A (en) 1998-08-19
US6047774A (en) 2000-04-11
GB9725026D0 (en) 1998-01-28
DE69736442D1 (de) 2006-09-14
NO996092D0 (no) 1999-12-09
AU3569097A (en) 1998-12-30
WO1998057031A1 (en) 1998-12-17
GB2327964A (en) 1999-02-10
EP1042587A4 (en) 2000-10-11
EP1686236A1 (en) 2006-08-02

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]
B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]