[go: up one dir, main page]

ZA200805283B - Controlling the pressure within an annular volume of a wellbore - Google Patents

Controlling the pressure within an annular volume of a wellbore

Info

Publication number
ZA200805283B
ZA200805283B ZA200805283A ZA200805283A ZA200805283B ZA 200805283 B ZA200805283 B ZA 200805283B ZA 200805283 A ZA200805283 A ZA 200805283A ZA 200805283 A ZA200805283 A ZA 200805283A ZA 200805283 B ZA200805283 B ZA 200805283B
Authority
ZA
South Africa
Prior art keywords
wellbore
controlling
pressure
annular volume
annular
Prior art date
Application number
ZA200805283A
Other languages
English (en)
Inventor
Robert E Hermes
Manuel E Gonzalez
Brian C Llewellyn
James B Bloys
Don M Coates
Original Assignee
Chevron Usa Inc
Univ California
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 Chevron Usa Inc, Univ California filed Critical Chevron Usa Inc
Publication of ZA200805283B publication Critical patent/ZA200805283B/xx

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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • 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
    • E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S507/00—Earth boring, well treating, and oil field chemistry
    • Y10S507/902—Controlled release agent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0391—Affecting flow by the addition of material or energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0396—Involving pressure control

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Earth Drilling (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Sampling And Sample Adjustment (AREA)
ZA200805283A 2005-11-18 2006-11-16 Controlling the pressure within an annular volume of a wellbore ZA200805283B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/282,424 US7441599B2 (en) 2005-11-18 2005-11-18 Controlling the pressure within an annular volume of a wellbore

Publications (1)

Publication Number Publication Date
ZA200805283B true ZA200805283B (en) 2009-10-28

Family

ID=38052354

Family Applications (5)

Application Number Title Priority Date Filing Date
ZA200805283A ZA200805283B (en) 2005-11-18 2006-11-16 Controlling the pressure within an annular volume of a wellbore
ZA2009/04234A ZA200904234B (en) 2005-11-18 2009-06-17 Controlling the pressure within an annular volume of a wellbore
ZA2010/03546A ZA201003546B (en) 2005-11-18 2010-05-19 Controlling the pressure within an annular volume of a wellbore
ZA2010/09000A ZA201009000B (en) 2005-11-18 2010-12-14 Controlling the pressure within an annular volume of a wellbore
ZA2010/09001A ZA201009001B (en) 2005-11-18 2010-12-14 Controlling the pressure within an annular volume of a wellbore

Family Applications After (4)

Application Number Title Priority Date Filing Date
ZA2009/04234A ZA200904234B (en) 2005-11-18 2009-06-17 Controlling the pressure within an annular volume of a wellbore
ZA2010/03546A ZA201003546B (en) 2005-11-18 2010-05-19 Controlling the pressure within an annular volume of a wellbore
ZA2010/09000A ZA201009000B (en) 2005-11-18 2010-12-14 Controlling the pressure within an annular volume of a wellbore
ZA2010/09001A ZA201009001B (en) 2005-11-18 2010-12-14 Controlling the pressure within an annular volume of a wellbore

Country Status (12)

Country Link
US (5) US7441599B2 (ja)
EP (1) EP1948902A4 (ja)
JP (1) JP4825989B2 (ja)
CN (5) CN102305047B (ja)
AU (1) AU2006318802B2 (ja)
BR (1) BRPI0618733A2 (ja)
CA (1) CA2630337C (ja)
EA (1) EA014617B1 (ja)
MY (4) MY154448A (ja)
TR (1) TR200803529T1 (ja)
WO (1) WO2007061816A2 (ja)
ZA (5) ZA200805283B (ja)

Families Citing this family (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070114034A1 (en) * 2005-11-18 2007-05-24 Chevron U.S.A. Inc. Controlling pressure and static charge build up within an annular volume of a wellbore
US7441599B2 (en) * 2005-11-18 2008-10-28 Chevron U.S.A. Inc. Controlling the pressure within an annular volume of a wellbore
CA2641596C (en) * 2006-02-09 2012-05-01 Weatherford/Lamb, Inc. Managed pressure and/or temperature drilling system and method
US8673827B1 (en) 2007-11-28 2014-03-18 Los Alamos National Security, Llc Method of analysis of polymerizable monomeric species in a complex mixture
US8100179B2 (en) * 2008-02-19 2012-01-24 Chevron U.S.A. Inc. Production and delivery of a fluid mixture to an annular volume of a wellbore
WO2009134902A1 (en) * 2008-04-30 2009-11-05 Altarock Energy, Inc. System and method for use of pressure actuated collapsing capsules suspended in a thermally expanding fluid in a subterranean containment space
US7604057B1 (en) * 2008-05-22 2009-10-20 Tesco Corporation (Us) Incremental U-tube process to retrieve of bottom hole assembly during casing while drilling operations
US8066074B2 (en) * 2008-11-18 2011-11-29 Chevron U.S.A. Inc. Systems and methods for mitigating annular pressure buildup in an oil or gas well
CN101624819B (zh) * 2009-07-28 2010-12-29 四川大学 双涡室掺气型漩流竖井
CA2715700A1 (en) * 2009-09-03 2011-03-03 Schlumberger Canada Limited Methods for servicing subterranean wells
US8215393B2 (en) * 2009-10-06 2012-07-10 Schlumberger Technology Corporation Method for treating well bore within a subterranean formation
US8360151B2 (en) * 2009-11-20 2013-01-29 Schlumberger Technology Corporation Methods for mitigation of annular pressure buildup in subterranean wells
US8353351B2 (en) * 2010-05-20 2013-01-15 Chevron U.S.A. Inc. System and method for regulating pressure within a well annulus
US20110315381A1 (en) * 2010-06-25 2011-12-29 Foy Streetman Compositions and method for use in plugging a well
US9631437B2 (en) 2011-02-03 2017-04-25 Exxonmobil Upstream Research Company Systems and methods for managing pressures in casing annuli of subterranean wells
US9217101B2 (en) * 2011-04-07 2015-12-22 Los Alamos National Security, Llc Low-melting elemental metal or fusible alloy encapsulated polymerization initiator for delayed initiation
EA201391547A1 (ru) * 2011-04-19 2014-03-31 Лэндмарк Графикс Корпорейшн Определение целостности скважины
US8651185B2 (en) * 2011-05-09 2014-02-18 Los Alamos National Security, Llc Reducing or stopping the uncontrolled flow of fluid such as oil from a well
US9096467B2 (en) 2012-08-27 2015-08-04 Schlumberger Technology Corporation Methods for completing subterranean wells
US9574419B2 (en) 2012-08-27 2017-02-21 Schlumberger Technology Corporation Methods for completing subterranean wells
CN102942911B (zh) * 2012-11-22 2015-03-04 吉林冠通能源科技有限公司 一种应用于低产低渗透油井加氢热气化学增产的溶液组份
US10265192B2 (en) 2013-07-03 2019-04-23 Spine Innovation, Llc Methods and apparatus for implanting an interbody device
US9631132B2 (en) * 2013-07-11 2017-04-25 Halliburton Energy Services, Inc. Mitigating annular pressure buildup using temperature-activated polymeric particulates
CN103324214B (zh) * 2013-07-19 2015-09-16 嘉华特种水泥股份有限公司 一种用于油井水泥养护釜的恒压压力控制方法
CN103439990B (zh) * 2013-07-19 2015-12-09 嘉华特种水泥股份有限公司 一种用于油井水泥养护釜的恒压压力控制系统
WO2015065453A1 (en) * 2013-10-31 2015-05-07 Landmark Graphics Corporation Determining pressure within a sealed annulus
US9546313B2 (en) * 2013-12-13 2017-01-17 Brian Henry Tomlinson Compositions and methods for controlling wellsite fluid and gas flow
US9458703B2 (en) 2013-12-26 2016-10-04 Superior Graphite Co. Compressible carbonaceous particulate material and method of making same
WO2015147806A1 (en) * 2014-03-25 2015-10-01 Halliburton Energy Services Inc. Method and apparatus for managing annular fluid expansion and pressure within a wellbore
US9845731B2 (en) 2014-09-24 2017-12-19 United Technologies Corporation Self-modulated cooling on turbine components
GB2546646B (en) * 2014-10-16 2020-10-07 Halliburton Energy Services Inc Methods for mitigating annular pressure build up in a wellbore using materials having a negative coefficient of thermal expansion
KR200482100Y1 (ko) * 2015-07-09 2016-12-15 한국해양과학기술원 선저플러그 파손방지용 케이싱유니트
US9976071B2 (en) 2015-08-12 2018-05-22 King Fahd University Of Petroleum And Minerals Enhanced oil recovery processes
CN106761554B (zh) * 2016-12-20 2019-06-11 中国石油天然气股份有限公司 深水油气井套管圈闭空间的压力释放装置
WO2019038643A1 (en) 2017-08-23 2019-02-28 Vallourec Tube-Alloy, Llc DEVICE AND METHOD FOR MITIGATING ANNULAR PRESSURE ACCUMULATION IN AN ANNULAR SPACE FOR WELLBORE TUBING
BR112020002057A2 (pt) 2017-09-19 2020-07-21 Halliburton Energy Services Inc. método para mitigar o acúmulo de pressão anular em um furo de poço, fluido espaçador, e, sistema que mitiga o acúmulo de pressão anular.
CN108131130A (zh) * 2017-12-05 2018-06-08 中国石油天然气集团公司 对气井井口套管环空压力监测数据的分析方法及其装置
CN108005612A (zh) * 2017-12-11 2018-05-08 中国海洋石油集团有限公司 五开次深水井环空压力管理方法
CN109097011B (zh) * 2018-08-13 2021-04-30 西南石油大学 一种基于地温加热的胶囊型膨胀体及其用于封堵地层漏失及其提高地层承载能力的方法
WO2020102258A1 (en) 2018-11-12 2020-05-22 Exxonmobil Upstream Research Company A fluid mixture containing compressible particles
WO2020102264A1 (en) 2018-11-12 2020-05-22 Exxonmobil Upstream Research Company Method of designing compressible particles having buoyancy in a confined volume
US11359129B2 (en) 2018-11-12 2022-06-14 Exxonmobil Upstream Research Company Method of placing a fluid mixture containing compressible particles into a wellbore
WO2020102263A1 (en) 2018-11-12 2020-05-22 Exxonmobil Upstream Research Company Buoyant particles designed for compressibility
GB2600284B (en) * 2019-08-23 2023-09-13 Landmark Graphics Corp Method for predicting annular fluid expansion in a borehole
US20220259948A1 (en) * 2019-08-23 2022-08-18 Landmark Graphics Corporation System and method for dual tubing well design and analysis cross-reference to related applications
DE102019006214A1 (de) * 2019-09-03 2021-03-04 Erdwerk GmbH Vorrichtung und Verfahren zum Druckabsichern von Tiefenbohrungen
US11215032B2 (en) 2020-01-24 2022-01-04 Saudi Arabian Oil Company Devices and methods to mitigate pressure buildup in an isolated wellbore annulus
US11814932B2 (en) * 2020-04-07 2023-11-14 ExxonMobil Technology and Engineering Company Method of attenuating annular pressure buildup using compressible particles
WO2021207011A1 (en) * 2020-04-07 2021-10-14 Exxonmobil Upstream Research Company Casing attachment system for attenuating annular pressure buildup
US11261712B2 (en) 2020-04-22 2022-03-01 Saudi Arabian Oil Company System and method for automated well annulus pressure control
US11639462B2 (en) * 2020-11-30 2023-05-02 Halliburton Energy Services, Inc. Intentional degradation of hollow particles for annular pressure build-up mitigation
WO2022135620A1 (es) * 2020-12-23 2022-06-30 BLANCO MOGOLLON, Fernando Antonio Regulador de presión para inyección de polímeros
CN112798043B (zh) * 2020-12-31 2021-10-26 北京石油化工学院 一种海洋油气柔性软管环空无损检测装置及方法
US11448061B1 (en) * 2021-03-04 2022-09-20 Saudi Arabian Oil Company Monitoring downhole leaks
US11377938B1 (en) 2021-12-21 2022-07-05 Halliburton Energy Services, Inc. Perforations using fluids containing hollow spheres
US12060773B2 (en) * 2022-09-26 2024-08-13 Saudi Arabian Oil Company Controlling a wellbore pressure
US12116883B2 (en) 2023-01-11 2024-10-15 Saudi Arabian Oil Company Annulus pressure monitoring, reporting, and control system for hydrocarbon wells

Family Cites Families (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527168A (en) * 1960-12-05 1970-09-08 Minnesota Mining & Mfg Solid propellant grain containing metal macrocapsules of fuel and oxidizer
US3223761A (en) * 1962-04-30 1965-12-14 Union Carbide Corp Melt extrusion of multi-wall plastic tubing
US3352790A (en) 1964-02-21 1967-11-14 Gen Aniline & Film Corp Process and compositions for dry cleaning
US3417816A (en) * 1967-06-29 1968-12-24 Gulf Research Development Co Method of cementing well casing
US3954632A (en) 1973-02-16 1976-05-04 The Procter & Gamble Company Softening additive and detergent composition
FR2234448B1 (ja) * 1973-06-25 1977-12-23 Petroles Cie Francaise
US4184790A (en) * 1977-03-01 1980-01-22 C. Nelson Shield, Jr., Trustee Submerged pile grouting
GB2079348B (en) * 1980-03-03 1983-08-17 Mobell Blowout Services Ltd Annulus plugging
US4588031A (en) * 1983-01-24 1986-05-13 Oliver Jr John E Well cementing process
US4846278A (en) * 1986-05-21 1989-07-11 Du Pont (Australia) Ltd. Borehole plug and method
US4883125A (en) 1987-12-11 1989-11-28 Atlantic Richfield Company Cementing oil and gas wells using converted drilling fluid
US4947935A (en) * 1989-07-14 1990-08-14 Marathon Oil Company Kill fluid for oil field operations
US5038865A (en) * 1989-12-29 1991-08-13 Cooper Industries, Inc. Method of and apparatus for protecting downhole equipment
US5552377A (en) * 1993-04-20 1996-09-03 Kindred; Jack E. Mud sweep and spacer composition
US5866516A (en) 1993-08-17 1999-02-02 Costin; C. Richard Compositions and methods for solidifying drilling fluids
TW324728B (en) * 1994-04-27 1998-01-11 Mitsui Toatsu Chemicals Soft polyurethane foam and process of producing the same
US5514360A (en) * 1995-03-01 1996-05-07 The State Of Oregon, Acting By And Through The Oregon State Board Of Higher Education, Acting For And On Behalf Of Oregon State University Negative thermal expansion materials
US5866515A (en) * 1995-07-19 1999-02-02 Basf Corporation Superconductor composite
US6009945A (en) * 1997-02-20 2000-01-04 T-Rex Technology, Inc. Oil well tool
US5919720A (en) * 1997-04-15 1999-07-06 State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University Materials with low or negative thermal expansion
US5927405A (en) 1997-06-13 1999-07-27 Abb Vetco Gray, Inc. Casing annulus remediation system
US6183716B1 (en) * 1997-07-30 2001-02-06 State Of Oregon Acting By And Through The State Board Of Higher Education Of Behalf Of Oregon State University Solution method for making molybdate and tungstate negative thermal expansion materials and compounds made by the method
US6164378A (en) * 1998-01-20 2000-12-26 Baker Hughes Incorporated Pressure-compensation system
US6187839B1 (en) 1999-03-03 2001-02-13 Halliburton Energy Services, Inc. Methods of sealing compositions and methods
GB2358204B (en) * 2000-01-14 2002-09-18 Fmc Corp Subsea completion annulus monitoring and bleed down system
US6780507B2 (en) * 2000-02-09 2004-08-24 Analytical Research Systems, Inc. Hydrocapsules and method of preparation thereof
KR100416250B1 (ko) 2001-02-05 2004-01-24 삼성전자주식회사 시분할 방식의 행렬연산기
US6457528B1 (en) * 2001-03-29 2002-10-01 Hunting Oilfield Services, Inc. Method for preventing critical annular pressure buildup
DE10123885A1 (de) * 2001-05-16 2002-12-12 Bayer Ag Verfahren zum Abfüllen von feuchtem, klebrigem Schüttgut
BR0205883A (pt) * 2001-08-17 2003-11-18 Kvaerner Oilfield Products Ltd Instalação de alojamento de cabeça de poço, sistema de monitoração/controle de pressão para uma disposição de cabeça de poço submarina e disposição de cabeça de poço submarina
US7066284B2 (en) * 2001-11-14 2006-06-27 Halliburton Energy Services, Inc. Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell
US6745844B2 (en) * 2002-03-19 2004-06-08 Halliburton Energy Services, Inc. Hydraulic power source for downhole instruments and actuators
US6959767B2 (en) 2002-09-12 2005-11-01 M-I Llc Remediation treatment of sustained casing pressures (SCP) in wells with top down surface injection of fluids and additives
US7048059B2 (en) 2002-10-15 2006-05-23 Baker Hughes Incorporated Annulus pressure control system for subsea wells
US6938707B2 (en) * 2003-05-15 2005-09-06 Chevron U.S.A. Inc. Method and system for minimizing circulating fluid return losses during drilling of a well bore
US6935910B2 (en) * 2003-09-12 2005-08-30 John Laine Watersport board fin assembly and methods of using same
US7096944B2 (en) 2004-03-02 2006-08-29 Halliburton Energy Services, Inc. Well fluids and methods of use in subterranean formations
US7642223B2 (en) * 2004-10-18 2010-01-05 Halliburton Energy Services, Inc. Methods of generating a gas in a plugging composition to improve its sealing ability in a downhole permeable zone
US20070114034A1 (en) * 2005-11-18 2007-05-24 Chevron U.S.A. Inc. Controlling pressure and static charge build up within an annular volume of a wellbore
US7441599B2 (en) * 2005-11-18 2008-10-28 Chevron U.S.A. Inc. Controlling the pressure within an annular volume of a wellbore

Also Published As

Publication number Publication date
ZA200904234B (en) 2011-04-28
CN101506465B (zh) 2012-11-28
CN102305047A (zh) 2012-01-04
CN102261230B (zh) 2014-06-04
MY153031A (en) 2014-12-31
TR200803529T1 (tr) 2009-03-23
CN102305047B (zh) 2014-07-30
CA2630337C (en) 2014-03-25
CN102305048B (zh) 2014-07-09
CN102305046B (zh) 2014-02-26
ZA201003546B (en) 2012-06-27
US7441599B2 (en) 2008-10-28
EA200801361A1 (ru) 2009-02-27
US7870905B2 (en) 2011-01-18
EP1948902A2 (en) 2008-07-30
US7743830B2 (en) 2010-06-29
US20100096138A1 (en) 2010-04-22
AU2006318802B2 (en) 2012-02-09
US20100163236A1 (en) 2010-07-01
US20100236780A1 (en) 2010-09-23
AU2006318802A1 (en) 2007-05-31
US20090133878A1 (en) 2009-05-28
CN102305048A (zh) 2012-01-04
EA014617B1 (ru) 2010-12-30
CA2630337A1 (en) 2007-05-31
CN101506465A (zh) 2009-08-12
MY154448A (en) 2015-06-15
BRPI0618733A2 (pt) 2011-09-13
WO2007061816A3 (en) 2009-04-30
CN102305046A (zh) 2012-01-04
US20070114033A1 (en) 2007-05-24
MY154447A (en) 2015-06-15
MY154446A (en) 2015-06-15
US7950460B2 (en) 2011-05-31
US7963333B2 (en) 2011-06-21
JP2009516111A (ja) 2009-04-16
JP4825989B2 (ja) 2011-11-30
ZA201009001B (en) 2012-07-25
ZA201009000B (en) 2012-07-25
EP1948902A4 (en) 2015-05-06
CN102261230A (zh) 2011-11-30
WO2007061816A2 (en) 2007-05-31

Similar Documents

Publication Publication Date Title
ZA201003546B (en) Controlling the pressure within an annular volume of a wellbore
GB2431942B (en) Managed pressure drilling
GB2419620B (en) Pressure controlled downhole operations
GB2418687B (en) Pressure actuated tubing safety valve
GB2438129B (en) Well tubing valve
GB0513140D0 (en) Novel method of controlling the operation of a downhole tool
GB2422161B (en) Tubing annulus valve
GB2429509B (en) Pressure balanced fluid control device
HK1108475A1 (en) Pressure independent control valve
EP1683973A4 (en) PRESSURE ACTUATOR EXERCISED BY A FLUID
EP1715230A4 (en) FLUID CONTROL
GB2420615B (en) Pressure rise combustor
GB2421456B (en) Pressure controlled superplastic forming
EP1993018A4 (en) PRESSURE REGULATOR
GB0417034D0 (en) Pressure regulator
EP1798623A4 (en) PRESSURE REGULATOR
GB2427221B (en) Controlling a fluid well
AU2004903854A0 (en) A fluid pumping means
GB0407076D0 (en) Fluid control
GB0512862D0 (en) Wellbore fluid
GB0510505D0 (en) Wellbore fluid
GB0417561D0 (en) Wellbore fluid
GB0407552D0 (en) Assesing the composition of a fluid
AU2005907108A0 (en) A fluid pump
GB0401198D0 (en) Fluid meeting