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EA201200295A1 - Способ и система бурения морских скважин - Google Patents

Способ и система бурения морских скважин

Info

Publication number
EA201200295A1
EA201200295A1 EA201200295A EA201200295A EA201200295A1 EA 201200295 A1 EA201200295 A1 EA 201200295A1 EA 201200295 A EA201200295 A EA 201200295A EA 201200295 A EA201200295 A EA 201200295A EA 201200295 A1 EA201200295 A1 EA 201200295A1
Authority
EA
Eurasian Patent Office
Prior art keywords
manifestation
drilling
subsea
choke manifold
gradient
Prior art date
Application number
EA201200295A
Other languages
English (en)
Other versions
EA024854B1 (ru
Inventor
Курт Е. Микс
Роберт Л. Майерс
Original Assignee
Бп Корпорейшн Норт Америка Инк.
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 Бп Корпорейшн Норт Америка Инк. filed Critical Бп Корпорейшн Норт Америка Инк.
Publication of EA201200295A1 publication Critical patent/EA201200295A1/ru
Publication of EA024854B1 publication Critical patent/EA024854B1/ru

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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
    • E21B21/082—Dual gradient systems, i.e. using two hydrostatic gradients or drilling fluid densities
    • 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
    • E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

Способы и системы для бурения подводных скважин с двухградиентными системами бурового раствора включают бурение морских скважин с помощью подводной насосной установки, подводного штуцерного манифольда и одного или более стояка возврата бурового раствора для реализации двухградиентной системы бурового раствора. При обнаружении проявления в стволе скважины скважину останавливают и с помощью компонентов оборудования определяют, применимо ли управление давлением для удаления проявления из ствола скважины, объем проявления и величину, на которую нужно снизить плотность бурового раствора для соответствия двухградиентному гидростатическому давлению, прежде чем проявление попадет в точку приема подводного насоса. Подводную насосную установку, подводный штуцерный манифольд и стояки для бурового раствора отсекают на время удаления проявления по одной или более линии в блоке бурового стояка с помощью надводного насоса, через устье скважины и надводный штуцерный манифольд.
EA201200295A 2009-09-10 2010-09-09 Способ и система бурения морских скважин EA024854B1 (ru)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24132009P 2009-09-10 2009-09-10
PCT/US2010/048239 WO2011031836A2 (en) 2009-09-10 2010-09-09 Systems and methods for circulating out a well bore influx in a dual gradient environment

Publications (2)

Publication Number Publication Date
EA201200295A1 true EA201200295A1 (ru) 2012-08-30
EA024854B1 EA024854B1 (ru) 2016-10-31

Family

ID=43729348

Family Applications (1)

Application Number Title Priority Date Filing Date
EA201200295A EA024854B1 (ru) 2009-09-10 2010-09-09 Способ и система бурения морских скважин

Country Status (9)

Country Link
US (1) US8517111B2 (ru)
EP (1) EP2475840B1 (ru)
CN (1) CN102575501B (ru)
AU (1) AU2010292219B2 (ru)
CA (1) CA2773188C (ru)
EA (1) EA024854B1 (ru)
IN (1) IN2012DN02965A (ru)
MX (1) MX2012002832A (ru)
WO (1) WO2011031836A2 (ru)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO333099B1 (no) * 2008-11-03 2013-03-04 Statoil Asa Fremgangsmate for modifisering av en eksisterende undervannsplassert oljeproduksjonsbronn, og en saledes modifisert oljeproduksjonsbronn
US8387705B2 (en) * 2009-08-12 2013-03-05 Bp Corporation North America Inc. Systems and methods for running casing into wells drilled with dual-gradient mud systems
US9057243B2 (en) * 2010-06-02 2015-06-16 Rudolf H. Hendel Enhanced hydrocarbon well blowout protection
MY161673A (en) * 2010-12-29 2017-05-15 Halliburton Energy Services Inc Subsea pressure control system
MX338446B (es) * 2011-03-24 2016-04-15 Prad Res & Dev Ltd Perforación con presión gestionada con la compensación de la elevación del equipo de perforación.
NO339484B1 (no) * 2011-04-13 2016-12-19 Ikm Cleandrill As Fremgangsmåte og apparatur for å bygge et undersjøisk brønnhull
WO2013001512A2 (en) * 2011-06-30 2013-01-03 Schlumberger Technology B.V. Gas injection for managed pressure drilling
US8783358B2 (en) * 2011-09-16 2014-07-22 Chevron U.S.A. Inc. Methods and systems for circulating fluid within the annulus of a flexible pipe riser
US9322232B2 (en) 2011-10-04 2016-04-26 Agr Subsea, A.S. System and method for inhibiting an explosive atmosphere in open riser subsea mud return drilling systems
GB2514020B (en) * 2012-01-31 2018-09-19 Enhanced Drilling As Boost system and method for dual gradient drilling
US20130220600A1 (en) * 2012-02-24 2013-08-29 Halliburton Energy Services, Inc. Well drilling systems and methods with pump drawing fluid from annulus
US9309732B2 (en) * 2012-04-27 2016-04-12 Weatherford Technology Holdings, Llc Pump for controlling the flow of well bore returns
KR101358337B1 (ko) 2012-05-04 2014-02-05 삼성중공업 주식회사 파이프라인용 펌프 설치장치와 이를 구비한 선박 및 이를 이용한 펌프 설치방법
CN103470201B (zh) * 2012-06-07 2017-05-10 通用电气公司 流体控制系统
US20130327533A1 (en) * 2012-06-08 2013-12-12 Intelliserv, Llc Wellbore influx detection in a marine riser
WO2014062664A2 (en) * 2012-10-15 2014-04-24 National Oilwell Varco, L.P. Dual gradient drilling system
EP2956615A2 (en) * 2013-02-12 2015-12-23 Weatherford Technology Holdings, LLC Apparatus and methods of running casing in a dual gradient system
NO341732B1 (no) * 2014-02-18 2018-01-15 Neodrill As Anordning og framgangsmåte for stabilisering av et brønnhode
US20150315875A1 (en) * 2014-04-30 2015-11-05 Halliburton Energy Services, Inc. Red Mud Solids in Spacer Fluids
WO2015190932A1 (en) * 2014-06-10 2015-12-17 Mhwirth As Method for detecting wellbore influx
US10260297B2 (en) 2014-10-02 2019-04-16 Baker Hughes, A Ge Company, Llc Subsea well systems and methods for controlling fluid from the wellbore to the surface
US10961795B1 (en) * 2015-04-12 2021-03-30 Pruitt Tool & Supply Co. Compact managed pressure drilling system attached to rotating control device and method of maintaining pressure control
CN104895548B (zh) * 2015-06-15 2017-11-03 中国石油大学(华东) 深水双梯度钻井用海底井口压力指示及自动调节装置
US20170037690A1 (en) * 2015-08-06 2017-02-09 Schlumberger Technology Corporation Automatic and integrated control of bottom-hole pressure
CN105401899B (zh) * 2015-11-06 2017-11-24 中国建筑科学研究院建筑机械化研究分院 原浆处理与回填再利用系统及其方法
US10815977B2 (en) 2016-05-20 2020-10-27 Onesubsea Ip Uk Limited Systems and methods for hydrate management
US10443328B2 (en) 2016-06-13 2019-10-15 Martin Culen Managed pressure drilling system with influx control
US10648315B2 (en) * 2016-06-29 2020-05-12 Schlumberger Technology Corporation Automated well pressure control and gas handling system and method
BR112019026145A2 (pt) 2017-06-12 2020-06-30 Ameriforge Group Inc. sistema de perfuração de gradiente duplo, gradiente duplo sem riser e gradiente duplo sem riser distribuído e método de perfuração de gradiente duplo
US10603607B2 (en) * 2017-10-19 2020-03-31 Saudi Arabian Oil Company Method and apparatus for smart electromagnetic screen system for use in drilling operations
CN110593777B (zh) * 2019-10-08 2020-11-06 西南石油大学 一种无隔水管双梯度钻井钻柱解脱回接装置
CA3160888A1 (en) * 2019-12-05 2021-06-10 Petroleo Brasileiro S.A. - Petrobras Method for clearing flexible lines using coiled tubing from a well intervention rig
JP7393751B2 (ja) * 2020-02-28 2023-12-07 Ｕｂｅ三菱セメント株式会社 レアアース泥の採泥方法及び環境負荷低減方法
NO346362B1 (en) * 2021-01-12 2022-06-27 Electrical Subsea & Drilling As A system and method for circulating drilling fluid in connection with open water drilling
CN112878904B (zh) * 2021-01-25 2022-04-29 西南石油大学 一种双层管双梯度钻井技术的井身结构优化方法
CN115142815A (zh) * 2021-03-31 2022-10-04 派格水下技术(广州)有限公司 水下钻井固体废物清理系统、钻井固井作业系统及其方法
JP2022184123A (ja) * 2021-05-31 2022-12-13 パナソニックＩｐマネジメント株式会社 流体の密度勾配検知方法および流体の密度勾配検知方法システム
CN115110893B (zh) * 2022-07-08 2024-10-15 西南石油大学 一种复杂油藏地层双梯度钻完井一体化作业系统及方法
US12188323B2 (en) 2022-12-05 2025-01-07 Saudi Arabian Oil Company Controlling a subsea blowout preventer stack
US12122957B2 (en) * 2022-12-13 2024-10-22 Saudi Arabian Oil Company Polymeric red mud-based killing fluid and uses thereof
CN116220583B (zh) * 2022-12-29 2025-06-06 西安石油大学 一种连续钻井当量循环密度降低控制装置
NO348119B1 (en) * 2023-12-20 2024-08-26 Norwegian Well Control As A method for controlling hydrostatic pressure in a shut in petroleum well subject to gas influx
CN120367531B (zh) * 2025-06-25 2025-09-16 广州海洋地质调查局三亚南海地质研究所 基于无隔水管的泥浆循环系统及其控制方法和操作方法

Family Cites Families (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063602A (en) * 1975-08-13 1977-12-20 Exxon Production Research Company Drilling fluid diverter system
US4042014A (en) 1976-05-10 1977-08-16 Bj-Hughes Inc. Multiple stage cementing of well casing in subsea wells
US4091881A (en) * 1977-04-11 1978-05-30 Exxon Production Research Company Artificial lift system for marine drilling riser
US4099583A (en) * 1977-04-11 1978-07-11 Exxon Production Research Company Gas lift system for marine drilling riser
US4291772A (en) * 1980-03-25 1981-09-29 Standard Oil Company (Indiana) Drilling fluid bypass for marine riser
US4447338A (en) * 1981-08-12 1984-05-08 Exxon Research And Engineering Co. Drilling mud viscosification agents based on sulfonated ionomers
US4399870A (en) * 1981-10-22 1983-08-23 Hughes Tool Company Annulus operated test valve
US4442011A (en) * 1981-12-21 1984-04-10 Exxon Research And Engineering Co. Drilling mud viscosification agents based on sulfonated ionomers
US4658904A (en) * 1985-05-31 1987-04-21 Schlumberger Technology Corporation Subsea master valve for use in well testing
US5006845A (en) * 1989-06-13 1991-04-09 Honeywell Inc. Gas kick detector
US5029642A (en) * 1989-09-07 1991-07-09 Crawford James B Apparatus for carrying tool on coil tubing with shifting sub
GB9016272D0 (en) * 1990-07-25 1990-09-12 Shell Int Research Detecting outflow or inflow of fluid in a wellbore
US5906966A (en) * 1991-06-24 1999-05-25 Exxon Research And Engineering Co. Drilling mud additives and in adding viscosification additives to oil-based drilling muds
US5447392A (en) 1993-05-03 1995-09-05 Shell Oil Company Backspan stress joint
GB9514510D0 (en) 1995-07-15 1995-09-13 Expro North Sea Ltd Lightweight intervention system
US6003834A (en) * 1996-07-17 1999-12-21 Camco International, Inc. Fluid circulation apparatus
US5873420A (en) * 1997-05-27 1999-02-23 Gearhart; Marvin Air and mud control system for underbalanced drilling
US6216799B1 (en) * 1997-09-25 2001-04-17 Shell Offshore Inc. Subsea pumping system and method for deepwater drilling
US6276455B1 (en) * 1997-09-25 2001-08-21 Shell Offshore Inc. Subsea gas separation system and method for offshore drilling
US6263981B1 (en) * 1997-09-25 2001-07-24 Shell Offshore Inc. Deepwater drill string shut-off valve system and method for controlling mud circulation
US7270185B2 (en) * 1998-07-15 2007-09-18 Baker Hughes Incorporated Drilling system and method for controlling equivalent circulating density during drilling of wellbores
US6415877B1 (en) * 1998-07-15 2002-07-09 Deep Vision Llc Subsea wellbore drilling system for reducing bottom hole pressure
US6102125A (en) 1998-08-06 2000-08-15 Abb Vetco Gray Inc. Coiled tubing workover riser
KR100537040B1 (ko) * 1998-08-19 2005-12-16 동경 엘렉트론 주식회사 현상장치
DE19849058A1 (de) 1998-10-24 2000-04-27 Zahnradfabrik Friedrichshafen Verfahren zur Steuerung einer Hochtemperatur-Betriebsart eines elektronisch gesteuerten, automatischen Schaltgetriebes
US6328107B1 (en) 1999-09-17 2001-12-11 Exxonmobil Upstream Research Company Method for installing a well casing into a subsea well being drilled with a dual density drilling system
NO994784A (no) 1999-10-01 2001-01-29 Kongsberg Offshore As Anordning ved undervanns lubrikator, samt fremgangsmåter for utsirkulering av fluider fra den samme
US6457529B2 (en) * 2000-02-17 2002-10-01 Abb Vetco Gray Inc. Apparatus and method for returning drilling fluid from a subsea wellbore
US6401824B1 (en) * 2000-03-13 2002-06-11 Davis-Lynch, Inc. Well completion convertible float shoe/collar
GB2361725B (en) 2000-04-27 2002-07-03 Fmc Corp Central circulation completion system
US6530437B2 (en) * 2000-06-08 2003-03-11 Maurer Technology Incorporated Multi-gradient drilling method and system
GB2365044A (en) 2000-07-18 2002-02-13 Stewart & Stevenson Inc System for drilling a subsea well
US8171989B2 (en) 2000-08-14 2012-05-08 Schlumberger Technology Corporation Well having a self-contained inter vention system
US6394195B1 (en) * 2000-12-06 2002-05-28 The Texas A&M University System Methods for the dynamic shut-in of a subsea mudlift drilling system
US6474422B2 (en) * 2000-12-06 2002-11-05 Texas A&M University System Method for controlling a well in a subsea mudlift drilling system
US6484816B1 (en) 2001-01-26 2002-11-26 Martin-Decker Totco, Inc. Method and system for controlling well bore pressure
US6619388B2 (en) * 2001-02-15 2003-09-16 Halliburton Energy Services, Inc. Fail safe surface controlled subsurface safety valve for use in a well
US6926101B2 (en) * 2001-02-15 2005-08-09 Deboer Luc System and method for treating drilling mud in oil and gas well drilling applications
US6536540B2 (en) * 2001-02-15 2003-03-25 De Boer Luc Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications
US7090036B2 (en) * 2001-02-15 2006-08-15 Deboer Luc System for drilling oil and gas wells by varying the density of drilling fluids to achieve near-balanced, underbalanced, or overbalanced drilling conditions
US6843331B2 (en) 2001-02-15 2005-01-18 De Boer Luc Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications
US7093662B2 (en) 2001-02-15 2006-08-22 Deboer Luc System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud
US6802379B2 (en) * 2001-02-23 2004-10-12 Exxonmobil Upstream Research Company Liquid lift method for drilling risers
US6457528B1 (en) * 2001-03-29 2002-10-01 Hunting Oilfield Services, Inc. Method for preventing critical annular pressure buildup
WO2003023181A1 (en) * 2001-09-10 2003-03-20 Ocean Riser Systems As Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells
US6712145B2 (en) * 2001-09-11 2004-03-30 Allamon Interests Float collar
US6684957B2 (en) * 2001-09-11 2004-02-03 Allamon Interests Float collar
US6745857B2 (en) * 2001-09-21 2004-06-08 National Oilwell Norway As Method of drilling sub-sea oil and gas production wells
US6634430B2 (en) 2001-12-20 2003-10-21 Exxonmobil Upstream Research Company Method for installation of evacuated tubular conduits
US6755261B2 (en) 2002-03-07 2004-06-29 Varco I/P, Inc. Method and system for controlling well fluid circulation rate
US6814142B2 (en) * 2002-10-04 2004-11-09 Halliburton Energy Services, Inc. Well control using pressure while drilling measurements
GB2417274B (en) 2003-06-17 2006-11-22 Worldwide Oilfield Machine Inc Lightweight and compact subsea intervention package and method
CA2532990C (en) * 2003-07-25 2009-10-13 Exxonmobil Upstream Research Company Continuous monobore liquid lining system
US6953097B2 (en) * 2003-08-01 2005-10-11 Varco I/P, Inc. Drilling systems
NO319213B1 (no) * 2003-11-27 2005-06-27 Agr Subsea As Fremgangsmåte og anordning for styring av borevæsketrykk
WO2007145731A2 (en) 2006-06-07 2007-12-21 Exxonmobil Upstream Research Company Compressible objects combined with a drilling fluid to form a variable density drilling mud
US8088716B2 (en) 2004-06-17 2012-01-03 Exxonmobil Upstream Research Company Compressible objects having a predetermined internal pressure combined with a drilling fluid to form a variable density drilling mud
WO2007145734A2 (en) * 2006-06-07 2007-12-21 Exxonmobil Upstream Research Company Compressible objects having partial foam interiors combined with a drilling fluid to form a variable density drilling mud
AU2005262591B2 (en) 2004-06-17 2011-02-24 Exxonmobil Upstream Research Company Variable density drilling mud
US7299880B2 (en) 2004-07-16 2007-11-27 Weatherford/Lamb, Inc. Surge reduction bypass valve
NO321854B1 (no) * 2004-08-19 2006-07-17 Agr Subsea As System og en fremgangsmåte for bruk og retur av boreslam fra en brønn som er boret på havbunnen
WO2006101606A2 (en) 2005-03-22 2006-09-28 Exxonmobil Upstream Research Company Method for running tubulars in wellbores
BRPI0622273A2 (pt) * 2005-06-09 2011-08-09 Whirlpool Co sistema de rede compreendendo um processador e pelo menos dois nós
US7866399B2 (en) * 2005-10-20 2011-01-11 Transocean Sedco Forex Ventures Limited Apparatus and method for managed pressure drilling
US7836973B2 (en) * 2005-10-20 2010-11-23 Weatherford/Lamb, Inc. Annulus pressure control drilling systems and methods
EP2035651A4 (en) * 2006-06-07 2009-08-05 Exxonmobil Upstream Res Co METHOD FOR PRODUCING COMPRESSIBLE OBJECTS FOR A VARIABLE DENSITY DRILLING FLUSH
NO325931B1 (no) * 2006-07-14 2008-08-18 Agr Subsea As Anordning og fremgangsmate ved stromningshjelp i en rorledning
CN100412311C (zh) * 2006-10-12 2008-08-20 中国海洋石油总公司 一种实现双梯度钻井的方法及装置
CN101573506B (zh) 2006-11-07 2013-11-06 哈利伯顿能源服务公司 海上通用隔水管系统
CN201059187Y (zh) * 2006-11-24 2008-05-14 中国海洋石油总公司 一种基于双梯度的控制压力钻井装置
US7578350B2 (en) * 2006-11-29 2009-08-25 Schlumberger Technology Corporation Gas minimization in riser for well control event
CN101730782B (zh) * 2007-06-01 2014-10-22 Agr深水发展系统股份有限公司 双密度泥浆返回系统
AU2009232499B2 (en) * 2008-04-04 2015-07-23 Enhanced Drilling As Systems and methods for subsea drilling
EA020116B1 (ru) * 2008-07-31 2014-08-29 Бп Корпорейшн Норт Америка Инк. Система и способ для подводной внутрискважинной работы

Also Published As

Publication number Publication date
EP2475840B1 (en) 2014-11-12
IN2012DN02965A (ru) 2015-07-31
EA024854B1 (ru) 2016-10-31
CN102575501B (zh) 2015-05-20
MX2012002832A (es) 2012-04-19
US20110061872A1 (en) 2011-03-17
CN102575501A (zh) 2012-07-11
CA2773188A1 (en) 2011-03-17
AU2010292219A1 (en) 2012-04-12
WO2011031836A3 (en) 2011-06-30
WO2011031836A2 (en) 2011-03-17
EP2475840A2 (en) 2012-07-18
CA2773188C (en) 2017-09-26
AU2010292219B2 (en) 2014-09-04
US8517111B2 (en) 2013-08-27

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MM4A Lapse of a eurasian patent due to non-payment of renewal fees within the time limit in the following designated state(s)

Designated state(s): AM BY KG MD TJ TM