EA200870156A1 - Способ обнаружения входа пластовой текучей среды в ствол скважины или потери бурового раствора в стволе скважины с использованием системы управления динамическим давлением в кольцевом пространстве - Google Patents

Способ обнаружения входа пластовой текучей среды в ствол скважины или потери бурового раствора в стволе скважины с использованием системы управления динамическим давлением в кольцевом пространстве

Info

Publication number
EA200870156A1
EA200870156A1 EA200870156A EA200870156A EA200870156A1 EA 200870156 A1 EA200870156 A1 EA 200870156A1 EA 200870156 A EA200870156 A EA 200870156A EA 200870156 A EA200870156 A EA 200870156A EA 200870156 A1 EA200870156 A1 EA 200870156A1
Authority
EA
Eurasian Patent Office
Prior art keywords
well
pressure
drilling fluid
wellbore
annulus
Prior art date
Application number
EA200870156A
Other languages
English (en)
Other versions
EA015325B1 (ru
Inventor
Дональд Г. Рейтсма
Original Assignee
ЭТ БЭЛЭНС АМЕРИКАС ЭлЭлСи
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 ЭТ БЭЛЭНС АМЕРИКАС ЭлЭлСи filed Critical ЭТ БЭЛЭНС АМЕРИКАС ЭлЭлСи
Publication of EA200870156A1 publication Critical patent/EA200870156A1/ru
Publication of EA015325B1 publication Critical patent/EA015325B1/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
    • 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
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems
    • E21B21/106—Valve arrangements outside the borehole, e.g. kelly valves

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

Предложен способ регулирования пластового давления при бурении ствола скважины в подземном пласте, включающий в себя прокачку бурового раствора через бурильную колонну в стволе скважины через буровое долото на конце бурильной колонны и в кольцевое пространство. Буровой раствор выпускается из кольцевого пространства вблизи поверхности земли. При этом измеряется, по меньшей мере, расход подачи бурового раствора в ствол скважины или расход выпуска бурового раствора из кольцевого пространства, измеряется давление бурового раствора в кольцевом пространстве вблизи поверхности земли и давление бурового раствора вблизи забоя ствола скважины. Осуществляют расчет давления бурового раствора вблизи забоя ствола скважины с использованием измеренного расхода, давления в кольцевом пространстве и плотности бурового раствора, и создают предупреждающий сигнал, если перепад между расчетным давлением и измеренным давлением превосходит выбранный порог.
EA200870156A 2006-01-05 2007-01-04 Способ определения существования события управления скважиной EA015325B1 (ru)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US75631106P 2006-01-05 2006-01-05
PCT/US2007/000088 WO2007081711A2 (en) 2006-01-05 2007-01-04 Method for determining formation fluid entry into or drilling fluid loss from a borehole using a dynamic annular pressure control system

Publications (2)

Publication Number Publication Date
EA200870156A1 true EA200870156A1 (ru) 2008-12-30
EA015325B1 EA015325B1 (ru) 2011-06-30

Family

ID=38256879

Family Applications (1)

Application Number Title Priority Date Filing Date
EA200870156A EA015325B1 (ru) 2006-01-05 2007-01-04 Способ определения существования события управления скважиной

Country Status (11)

Country Link
US (1) US7562723B2 (ru)
EP (1) EP1969204A4 (ru)
AU (1) AU2007205225B2 (ru)
BR (1) BRPI0706315B1 (ru)
CA (1) CA2635097C (ru)
EA (1) EA015325B1 (ru)
EG (1) EG26269A (ru)
MX (1) MX2008008658A (ru)
MY (1) MY144145A (ru)
NO (1) NO343086B1 (ru)
WO (1) WO2007081711A2 (ru)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2513812C2 (ru) * 2009-10-21 2014-04-20 Шлюмбергер Текнолоджи Б.В. Система, способ и считываемый компьютером носитель для вычисления расходов скважин, создаваемых электропогружными насосами
US9784096B2 (en) 2012-12-28 2017-10-10 Halliburton Energy Services, Inc. Expanded mud pulse telemetry

Families Citing this family (87)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007047800A2 (en) * 2005-10-20 2007-04-26 Transocean Sedco Forex Ventures Ltd. Apparatus and method for managed pressure drilling
US20070227774A1 (en) * 2006-03-28 2007-10-04 Reitsma Donald G Method for Controlling Fluid Pressure in a Borehole Using a Dynamic Annular Pressure Control System
US7857046B2 (en) * 2006-05-31 2010-12-28 Schlumberger Technology Corporation Methods for obtaining a wellbore schematic and using same for wellbore servicing
EA014363B1 (ru) * 2006-10-23 2010-10-29 Эм-Ай Эл. Эл. Си. Способ и устройство для регулирования забойного давления в подземном пласте во время работы бурового насоса
US9435162B2 (en) 2006-10-23 2016-09-06 M-I L.L.C. Method and apparatus for controlling bottom hole pressure in a subterranean formation during rig pump operation
US8033335B2 (en) 2006-11-07 2011-10-11 Halliburton Energy Services, Inc. Offshore universal riser system
CA2704677C (en) * 2007-11-09 2013-09-17 M-I Llc Automated electrical stability meter
GB0819340D0 (en) * 2008-10-22 2008-11-26 Managed Pressure Operations Ll Drill pipe
US7984770B2 (en) * 2008-12-03 2011-07-26 At-Balance Americas, Llc Method for determining formation integrity and optimum drilling parameters during drilling
US8281875B2 (en) 2008-12-19 2012-10-09 Halliburton Energy Services, Inc. Pressure and flow control in drilling operations
US7823656B1 (en) 2009-01-23 2010-11-02 Nch Corporation Method for monitoring drilling mud properties
GB0905633D0 (en) 2009-04-01 2009-05-13 Managed Pressure Operations Ll Apparatus for and method of drilling a subterranean borehole
GB2469119B (en) 2009-04-03 2013-07-03 Managed Pressure Operations Drill pipe connector
US7950451B2 (en) * 2009-04-10 2011-05-31 Bp Corporation North America Inc. Annulus mud flow rate measurement while drilling and use thereof to detect well dysfunction
US9567843B2 (en) 2009-07-30 2017-02-14 Halliburton Energy Services, Inc. Well drilling methods with event detection
US8757254B2 (en) * 2009-08-18 2014-06-24 Schlumberger Technology Corporation Adjustment of mud circulation when evaluating a formation
US8567525B2 (en) * 2009-08-19 2013-10-29 Smith International, Inc. Method for determining fluid control events in a borehole using a dynamic annular pressure control system
US8360170B2 (en) 2009-09-15 2013-01-29 Managed Pressure Operations Pte Ltd. Method of drilling a subterranean borehole
GB2473672B (en) 2009-09-22 2013-10-02 Statoilhydro Asa Control method and apparatus for well operations
AU2015200308B2 (en) * 2010-01-05 2017-03-02 Halliburton Energy Services, Inc. Well control systems and methods
AU2010340366B2 (en) * 2010-01-05 2014-10-23 Halliburton Energy Services, Inc. Well control systems and methods
EP2483513B1 (en) * 2010-02-25 2015-08-12 Halliburton Energy Services, Inc. Pressure control device with remote orientation relative to a rig
WO2011109748A1 (en) * 2010-03-05 2011-09-09 Safekick Americas Llc System and method for safe well control operations
US8820405B2 (en) 2010-04-27 2014-09-02 Halliburton Energy Services, Inc. Segregating flowable materials in a well
US8201628B2 (en) 2010-04-27 2012-06-19 Halliburton Energy Services, Inc. Wellbore pressure control with segregated fluid columns
US9284799B2 (en) * 2010-05-19 2016-03-15 Smith International, Inc. Method for drilling through nuisance hydrocarbon bearing formations
US8413722B2 (en) * 2010-05-25 2013-04-09 Agr Subsea, A.S. Method for circulating a fluid entry out of a subsurface wellbore without shutting in the wellbore
US9279299B2 (en) * 2010-08-26 2016-03-08 Halliburton Energy Services, Inc. System and method for managed pressure drilling
GB2483671B (en) 2010-09-15 2016-04-13 Managed Pressure Operations Drilling system
US8757272B2 (en) * 2010-09-17 2014-06-24 Smith International, Inc. Method and apparatus for precise control of wellbore fluid flow
US8684109B2 (en) 2010-11-16 2014-04-01 Managed Pressure Operations Pte Ltd Drilling method for drilling a subterranean borehole
US8739863B2 (en) 2010-11-20 2014-06-03 Halliburton Energy Services, Inc. Remote operation of a rotating control device bearing clamp
US9163473B2 (en) 2010-11-20 2015-10-20 Halliburton Energy Services, Inc. Remote operation of a rotating control device bearing clamp and safety latch
WO2012122468A1 (en) * 2011-03-09 2012-09-13 Prad Research And Development Limited Method for automatic pressure control during drilling including correction for drill string movement
US9016381B2 (en) 2011-03-17 2015-04-28 Hydril Usa Manufacturing Llc Mudline managed pressure drilling and enhanced influx detection
RU2591066C2 (ru) * 2011-03-31 2016-07-10 Нэшнел Ойлвелл Варко Норвей Ас Способ и устройство для предотвращения ошибочного открытия предохранительного клапана для бурового раствора
US9249638B2 (en) 2011-04-08 2016-02-02 Halliburton Energy Services, Inc. Wellbore pressure control with optimized pressure drilling
EP2694772A4 (en) * 2011-04-08 2016-02-24 Halliburton Energy Services Inc AUTOMATIC LEVEL TUBE PRESSURE CONTROL ON HOLES
US9080407B2 (en) 2011-05-09 2015-07-14 Halliburton Energy Services, Inc. Pressure and flow control in drilling operations
US9394783B2 (en) 2011-08-26 2016-07-19 Schlumberger Technology Corporation Methods for evaluating inflow and outflow in a subterranean wellbore
US9404327B2 (en) 2011-08-26 2016-08-02 Schlumberger Technology Corporation Methods for evaluating borehole volume changes while drilling
WO2013036397A1 (en) * 2011-09-08 2013-03-14 Halliburton Energy Services, Inc. High temperature drilling with lower temperature rated tools
WO2013050989A1 (en) * 2011-10-06 2013-04-11 Schlumberger Technology B.V. Testing while fracturing while drilling
US9447647B2 (en) 2011-11-08 2016-09-20 Halliburton Energy Services, Inc. Preemptive setpoint pressure offset for flow diversion in drilling operations
IN2014DN03333A (ru) * 2011-11-08 2015-06-05 Halliburton Energy Services Inc
RU2592583C2 (ru) * 2011-11-30 2016-07-27 Халлибертон Энерджи Сервисез, Инк. Использование результатов измерения давления в скважине во время бурения для выявления притоков и для их уменьшения
US9080427B2 (en) 2011-12-02 2015-07-14 General Electric Company Seabed well influx control system
EP2791462B1 (en) * 2011-12-14 2018-02-14 Schlumberger Holdings Limited Connection maker
US9033048B2 (en) * 2011-12-28 2015-05-19 Hydril Usa Manufacturing Llc Apparatuses and methods for determining wellbore influx condition using qualitative indications
US20130220600A1 (en) * 2012-02-24 2013-08-29 Halliburton Energy Services, Inc. Well drilling systems and methods with pump drawing fluid from annulus
US10138692B2 (en) * 2012-04-27 2018-11-27 Weatherford Technology Holdings, Llc Method and apparatus for controlling the flow of wellbore returns
CN103470201B (zh) 2012-06-07 2017-05-10 通用电气公司 流体控制系统
US20140048331A1 (en) 2012-08-14 2014-02-20 Weatherford/Lamb, Inc. Managed pressure drilling system having well control mode
US9823373B2 (en) 2012-11-08 2017-11-21 Halliburton Energy Services, Inc. Acoustic telemetry with distributed acoustic sensing system
US10428637B2 (en) 2013-03-04 2019-10-01 Fereidoun Abbassian System and console for monitoring and managing well site operations
US10215009B2 (en) 2013-06-30 2019-02-26 Sigurd Tjostheim System and console for monitoring data stream quality in drilling and production operations at a well site
WO2014151627A2 (en) * 2013-03-15 2014-09-25 Fereidoun Abbassian System and console for rig site fluid management at a well site
WO2015002904A2 (en) 2013-06-30 2015-01-08 Fereidoun Abbassian System and console for monitoring and managing well site operations
US9664003B2 (en) 2013-08-14 2017-05-30 Canrig Drilling Technology Ltd. Non-stop driller manifold and methods
GB2535380B (en) 2013-11-13 2017-05-24 Schlumberger Holdings Well alarms and event detection
US10436014B2 (en) 2014-05-02 2019-10-08 Kongsberg Oil And Gas Technologies As System and console for monitoring and managing pressure testing operations at a well site
US10301923B2 (en) 2014-05-02 2019-05-28 Kongsberg Oil And Gas Technologies As System and console for monitoring and managing well site drilling operations
US10323502B2 (en) 2014-05-02 2019-06-18 Kongsberg Oil And Gas Technologies As System and console for monitoring and managing tripping operations at a well site
US10260332B2 (en) 2014-05-02 2019-04-16 Kongsberg Oil And Gas Technologies As System and console for monitoring and managing well site operations
US10184305B2 (en) * 2014-05-07 2019-01-22 Halliburton Enery Services, Inc. Elastic pipe control with managed pressure drilling
US10352159B2 (en) 2014-05-15 2019-07-16 Halliburton Energy Services, Inc. Monitoring of drilling operations using discretized fluid flows
US9995098B2 (en) * 2014-10-08 2018-06-12 Weatherford Technology Holdings, Llc Choke control tuned by flow coefficient for controlled pressure drilling
US10041316B2 (en) * 2015-06-16 2018-08-07 Baker Hughes, A Ge Company, Llc Combined surface and downhole kick/loss detection
WO2017023789A1 (en) * 2015-07-31 2017-02-09 The Johns Hopkins University Method for estimating permeability of fraclured rock formations from induced slow fluid pressure waves
MX2018002552A (es) * 2015-09-01 2018-06-07 Schlumberger Technology Bv Control proporcional de flujo del lodo de perforacion en el equipo de perforacion.
CA2994479C (en) * 2015-09-01 2024-01-02 Pason Systems Corp. Method and system for detecting at least one of an influx event and a loss event during well drilling
US10845501B2 (en) * 2015-11-12 2020-11-24 Schlumberger Technology Corporation Control of electrically operated radiation generators
US10227838B2 (en) 2016-05-10 2019-03-12 Weatherford Technology Holdings, Llc Drilling system and method having flow measurement choke
US11085258B2 (en) 2016-05-31 2021-08-10 National Oilwell DHT, L.P. Systems, methods, and computer-readable media to monitor and control well site drill cuttings transport
US10648315B2 (en) * 2016-06-29 2020-05-12 Schlumberger Technology Corporation Automated well pressure control and gas handling system and method
US10844676B2 (en) 2016-12-22 2020-11-24 Schlumberger Technology Corporation Pipe ram annular adjustable restriction for managed pressure drilling with changeable rams
US10364622B2 (en) * 2017-02-23 2019-07-30 Cameron International Corporation Manifold assembly for a mineral extraction system
US10590719B2 (en) * 2017-02-23 2020-03-17 Cameron International Corporation Manifold assembly for a mineral extraction system
US11041349B2 (en) 2018-10-11 2021-06-22 Schlumberger Technology Corporation Automatic shift detection for oil and gas production system
CN109458171B (zh) * 2018-10-23 2022-04-22 西南石油大学 一种新型窄安全密度窗口地层漏失压力测量的方法
CN109488286B (zh) * 2018-12-03 2022-03-11 西南石油大学 一种油气井井下多点压力测量溢流监测方法
RU2728079C1 (ru) * 2019-06-10 2020-07-28 Федеральное государственное бюджетное образовательное учреждение высшего образования "Астраханский государственный технический университет" ФГБОУ ВО "АГТУ" Устройство для управления процессом бурения скважин
US11261712B2 (en) * 2020-04-22 2022-03-01 Saudi Arabian Oil Company System and method for automated well annulus pressure control
US11028648B1 (en) * 2020-11-05 2021-06-08 Quaise, Inc. Basement rock hybrid drilling
CN115142836A (zh) * 2021-03-30 2022-10-04 中国石油化工股份有限公司 一种地层气产量的监测方法、存储介质以及设备
US11892421B2 (en) 2021-12-06 2024-02-06 Schlumberger Technology Corporation System and method for cleaning electrical stability probe
WO2024050009A1 (en) * 2022-09-01 2024-03-07 Schlumberger Technology Corporation Drilling fluid framework

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338319A (en) * 1965-07-29 1967-08-29 Bass Brothers Entpr Inc Apparatus for maintaining balanced mud circulation to prevent blowouts
US3614761A (en) * 1969-11-03 1971-10-19 Dresser Ind Method and apparatus for monitoring potential or lost circulation in an earth borehole
US4355784A (en) * 1980-08-04 1982-10-26 Warren Automatic Tool Company Method and apparatus for controlling back pressure
US4630675A (en) * 1985-05-28 1986-12-23 Smith International Inc. Drilling choke pressure limiting control system
US7174975B2 (en) * 1998-07-15 2007-02-13 Baker Hughes Incorporated Control systems and methods for active controlled bottomhole pressure systems
US6374925B1 (en) * 2000-09-22 2002-04-23 Varco Shaffer, Inc. Well drilling method and 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
US20020112888A1 (en) * 2000-12-18 2002-08-22 Christian Leuchtenberg Drilling system and method
US7992655B2 (en) * 2001-02-15 2011-08-09 Dual Gradient Systems, Llc Dual gradient drilling method and apparatus with multiple concentric drill tubes and blowout preventers
US6575244B2 (en) * 2001-07-31 2003-06-10 M-I L.L.C. System for controlling the operating pressures within a subterranean borehole
US7027968B2 (en) * 2002-01-18 2006-04-11 Conocophillips Company Method for simulating subsea mudlift drilling and well control operations
US6904981B2 (en) * 2002-02-20 2005-06-14 Shell Oil Company Dynamic annular pressure control apparatus and method
EP1488073B2 (en) * 2002-02-20 2012-08-01 @Balance B.V. Dynamic annular pressure control apparatus and method
US7185719B2 (en) * 2002-02-20 2007-03-06 Shell Oil Company Dynamic annular pressure control apparatus and method
US6755261B2 (en) * 2002-03-07 2004-06-29 Varco I/P, Inc. Method and system for controlling well fluid circulation rate
US6820702B2 (en) 2002-08-27 2004-11-23 Noble Drilling Services Inc. Automated method and system for recognizing well control events
US6920942B2 (en) * 2003-01-29 2005-07-26 Varco I/P, Inc. Method and apparatus for directly controlling pressure and position associated with an adjustable choke apparatus
US7350597B2 (en) * 2003-08-19 2008-04-01 At-Balance Americas Llc Drilling system and method
US20050092523A1 (en) * 2003-10-30 2005-05-05 Power Chokes, L.P. Well pressure control system
US7156193B2 (en) * 2004-06-04 2007-01-02 Matt Swartout Continuous positive flow backflash prevention system
US7407019B2 (en) * 2005-03-16 2008-08-05 Weatherford Canada Partnership Method of dynamically controlling open hole pressure in a wellbore using wellhead pressure control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2513812C2 (ru) * 2009-10-21 2014-04-20 Шлюмбергер Текнолоджи Б.В. Система, способ и считываемый компьютером носитель для вычисления расходов скважин, создаваемых электропогружными насосами
US9784096B2 (en) 2012-12-28 2017-10-10 Halliburton Energy Services, Inc. Expanded mud pulse telemetry

Also Published As

Publication number Publication date
EP1969204A4 (en) 2012-12-26
WO2007081711A3 (en) 2008-02-21
NO20083419L (no) 2008-08-05
MX2008008658A (es) 2008-11-28
CA2635097C (en) 2011-08-09
BRPI0706315B1 (pt) 2018-02-06
US7562723B2 (en) 2009-07-21
AU2007205225A1 (en) 2007-07-19
EG26269A (en) 2013-06-05
US20070151762A1 (en) 2007-07-05
EA015325B1 (ru) 2011-06-30
AU2007205225B2 (en) 2010-11-11
NO343086B1 (no) 2018-10-29
MY144145A (en) 2011-08-15
CA2635097A1 (en) 2007-07-19
WO2007081711A2 (en) 2007-07-19
EP1969204A2 (en) 2008-09-17
BRPI0706315A2 (pt) 2011-03-22

Similar Documents

Publication Publication Date Title
EA200870156A1 (ru) Способ обнаружения входа пластовой текучей среды в ствол скважины или потери бурового раствора в стволе скважины с использованием системы управления динамическим давлением в кольцевом пространстве
RU2586129C1 (ru) Система и способ управления давлением в кольцевом пространстве ствола скважины с применением газлифта в линии возврата бурового раствора
EA200600444A1 (ru) Система и способ бурения скважины
EP1898044A3 (en) Annulus pressure control drilling systems and methods
EG23985A (en) A method and device for controlling drilling fluidpressure
GB2486106A (en) Method of drilling and running casing in large diameter wellbore
CN1643233A (zh) 动态环隙压力控制装置和方法
GB2396875A (en) Active controlled bottomhole pressure system & method background of the invention
CN101023241A (zh) 钻有损耗地层的方法
ATE538285T1 (de) Bohrsystem und -verfahren mit kontinuierlichem durchfluss
GB2439492A (en) Systems and methods for managing downhole pressure
NO20045471L (no) Fremgangsmate for a bestemme trykk i jordformasjoner
WO2009058706A3 (en) Anchored riserless mud return systems
RU2010132224A (ru) Способ и устройство для бурения и заканчивания при программируемом давлении и программируемом градиенте давления
RU2010127299A (ru) Способ и система для гидроразрыва подземных пластов во время их бурения
BRPI0922775B1 (pt) método para determinar integridade da formação durante a perfuração de um furo de poço
WO2005062749A3 (en) System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud
MX354355B (es) Sistemas y métodos de perforación multi-fases.
US11073007B2 (en) Methods to perform wellbore strengthening, methods to pulse hydraulic fracture a downhole formation, and wellbore strengthening systems
US20140190751A1 (en) Method and System for Drilling with Reduced Surface Pressure
GB2441928A (en) Drill cuttings re-injection system
WO2013050872A3 (en) System and method for inhibiting an explosive atmosphere in open riser subsea mud return drilling systems
CN104533325A (zh) 油气水井通用型正循环式高效内捞砂组合工具
RU2450112C1 (ru) Устройство для бурения скважины и её эксплуатации
CN103104248A (zh) 泥浆密度和质量流量的测量方法

Legal Events

Date Code Title Description
PC4A Registration of transfer of a eurasian patent by assignment
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 AZ BY KG MD TJ TM