NO20083392L - Bronnkontrollsystem og tilhorende metoder - Google Patents

Bronnkontrollsystem og tilhorende metoder

Info

Publication number
NO20083392L
NO20083392L NO20083392A NO20083392A NO20083392L NO 20083392 L NO20083392 L NO 20083392L NO 20083392 A NO20083392 A NO 20083392A NO 20083392 A NO20083392 A NO 20083392A NO 20083392 L NO20083392 L NO 20083392L
Authority
NO
Norway
Prior art keywords
drilling
borehole
associated methods
operation variable
change
Prior art date
Application number
NO20083392A
Other languages
English (en)
Other versions
NO338495B1 (no
Inventor
Roger Lynn Schultz
Dingding Chen
Sara Shayegi
Craig Godfrey
Original Assignee
Halliburton Energy Serv Inc
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 Halliburton Energy Serv Inc filed Critical Halliburton Energy Serv Inc
Publication of NO20083392L publication Critical patent/NO20083392L/no
Publication of NO338495B1 publication Critical patent/NO338495B1/no

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
    • E21B44/00Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/04Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
    • G05B13/048Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators using a predictor
    • 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
    • E21B44/00Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • E21B44/005Below-ground automatic control systems
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/04Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
    • G05B13/041Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a variable is automatically adjusted to optimise the performance
    • 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
    • E21B2200/00Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/22Fuzzy logic, artificial intelligence, neural networks or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Evolutionary Computation (AREA)
  • Medical Informatics (AREA)
  • Software Systems (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (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)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Vehicle Body Suspensions (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)

Abstract

Brønnstyresystemer og tilhørende fremgangsmåter omfatter trinnene med å bore et borehull og predikere en endring i strømmen mellom borehullet og reservoaret før endringen oppstår, idet predikeringstrinnet blir utført og endringen i strømmen oppstår under boring. En annen brønnstyrefremgangsmåte omfatter trinnene med å: avføle minst én første boreoperasjonsvariabel under boring av et borehull for derved å generere første avfølte variabler, avføle minst én andre boreoperasjonsvariabel under boring av borehullet for derved å generere andre avfølte variabler og lære opp en prediktiv innretning ved å bruke første og andre avfølte variabler for å predikere den andre boreoperasjonsvariabelen ved et valgt tidspunkt.
NO20083392A 2006-01-17 2008-08-01 Brønnstyresystemer og tilhørende fremgangsmåter NO338495B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/333,768 US7610251B2 (en) 2006-01-17 2006-01-17 Well control systems and associated methods
PCT/US2007/060001 WO2008016717A2 (en) 2006-01-17 2007-01-01 Well control systems and associated methods

Publications (2)

Publication Number Publication Date
NO20083392L true NO20083392L (no) 2008-10-17
NO338495B1 NO338495B1 (no) 2016-08-22

Family

ID=38264281

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20083392A NO338495B1 (no) 2006-01-17 2008-08-01 Brønnstyresystemer og tilhørende fremgangsmåter

Country Status (7)

Country Link
US (1) US7610251B2 (no)
CN (1) CN101395545B (no)
BR (1) BRPI0707157A2 (no)
CA (1) CA2637584C (no)
GB (3) GB2479663B (no)
NO (1) NO338495B1 (no)
WO (1) WO2008016717A2 (no)

Families Citing this family (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8374974B2 (en) * 2003-01-06 2013-02-12 Halliburton Energy Services, Inc. Neural network training data selection using memory reduced cluster analysis for field model development
US7337660B2 (en) * 2004-05-12 2008-03-04 Halliburton Energy Services, Inc. Method and system for reservoir characterization in connection with drilling operations
US8352226B2 (en) * 2006-01-31 2013-01-08 Landmark Graphics Corporation Methods, systems, and computer-readable media for real-time oil and gas field production optimization using a proxy simulator
US8504341B2 (en) * 2006-01-31 2013-08-06 Landmark Graphics Corporation Methods, systems, and computer readable media for fast updating of oil and gas field production models with physical and proxy simulators
CA2867387C (en) 2006-11-07 2016-01-05 Charles R. Orbell Method of drilling with a string sealed in a riser and injecting fluid into a return line
US7546170B2 (en) * 2007-01-02 2009-06-09 Neuroblast, Inc. Easily tuned and robust control algorithm for single or multiple variable systems
US8417495B2 (en) * 2007-11-07 2013-04-09 Baker Hughes Incorporated Method of training neural network models and using same for drilling wellbores
US8437996B2 (en) 2007-12-13 2013-05-07 Exxonmobil Upstream Research Company Parallel adaptive data partitioning on a reservoir simulation using an unstructured grid
US9514388B2 (en) * 2008-08-12 2016-12-06 Halliburton Energy Services, Inc. Systems and methods employing cooperative optimization-based dimensionality reduction
US7802625B2 (en) * 2008-11-11 2010-09-28 Nitro-Lift Hydrocarbon Recovery Systems, Llc System and method for producing a well using a gas
US8281875B2 (en) 2008-12-19 2012-10-09 Halliburton Energy Services, Inc. Pressure and flow control in drilling operations
US8170800B2 (en) 2009-03-16 2012-05-01 Verdande Technology As Method and system for monitoring a drilling operation
US9567843B2 (en) 2009-07-30 2017-02-14 Halliburton Energy Services, Inc. Well drilling methods with event detection
CA2770230C (en) 2009-08-07 2016-05-17 Exxonmobil Upstream Research Company Methods to estimate downhole drilling vibration amplitude from surface measurement
US8798978B2 (en) 2009-08-07 2014-08-05 Exxonmobil Upstream Research Company Methods to estimate downhole drilling vibration indices from surface measurement
WO2011016928A1 (en) 2009-08-07 2011-02-10 Exxonmobil Upstream Research Company Drilling advisory systems and method based on at least two controllable drilling parameters
US9127530B2 (en) * 2009-08-07 2015-09-08 Schlumberger Technology Corporation Collision avoidance system with offset wellbore vibration analysis
GB2473672B (en) 2009-09-22 2013-10-02 Statoilhydro Asa Control method and apparatus for well operations
US9328573B2 (en) 2009-10-05 2016-05-03 Halliburton Energy Services, Inc. Integrated geomechanics determinations and wellbore pressure control
WO2011043851A1 (en) 2009-10-05 2011-04-14 Halliburton Energy Services, Inc. Deep evaluation of resistive anomalies in borehole environments
WO2011043763A1 (en) * 2009-10-05 2011-04-14 Halliburton Energy Services, Inc. Well drilling method utilizing real time response to ahead of bit measurements
US8860416B2 (en) 2009-10-05 2014-10-14 Halliburton Energy Services, Inc. Downhole sensing in borehole environments
US8899348B2 (en) * 2009-10-16 2014-12-02 Weatherford/Lamb, Inc. Surface gas evaluation during controlled pressure drilling
JP2011107648A (ja) * 2009-11-20 2011-06-02 Fujifilm Corp レンズユニット
US8727037B1 (en) 2009-12-14 2014-05-20 David E. Mouton Well control operational and training aid
US8678085B1 (en) 2009-12-14 2014-03-25 David E. Mouton Well control operational and training aid
US20110155466A1 (en) * 2009-12-28 2011-06-30 Halliburton Energy Services, Inc. Varied rpm drill bit steering
US9279298B2 (en) 2010-01-05 2016-03-08 Halliburton Energy Services, Inc. Well control systems and methods
US8201628B2 (en) 2010-04-27 2012-06-19 Halliburton Energy Services, Inc. Wellbore pressure control with segregated fluid columns
US8820405B2 (en) 2010-04-27 2014-09-02 Halliburton Energy Services, Inc. Segregating flowable materials in a well
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
CN102667657B (zh) * 2010-06-10 2016-02-10 哈里伯顿能源服务公司 用于远程井监测的系统和方法
US20130116802A1 (en) * 2010-06-30 2013-05-09 Metso Automation Oy Tracking simulation method
US9279299B2 (en) 2010-08-26 2016-03-08 Halliburton Energy Services, Inc. System and method for managed pressure drilling
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
US8783381B2 (en) 2011-07-12 2014-07-22 Halliburton Energy Services, Inc. Formation testing in managed pressure drilling
US9436173B2 (en) 2011-09-07 2016-09-06 Exxonmobil Upstream Research Company Drilling advisory systems and methods with combined global search and local search methods
US9605507B2 (en) 2011-09-08 2017-03-28 Halliburton Energy Services, Inc. High temperature drilling with lower temperature rated tools
US9447647B2 (en) 2011-11-08 2016-09-20 Halliburton Energy Services, Inc. Preemptive setpoint pressure offset for flow diversion in drilling operations
US8854044B2 (en) 2011-11-09 2014-10-07 Haliburton Energy Services, Inc. Instrumented core barrels and methods of monitoring a core while the core is being cut
US8797035B2 (en) 2011-11-09 2014-08-05 Halliburton Energy Services, Inc. Apparatus and methods for monitoring a core during coring operations
US8794051B2 (en) 2011-11-10 2014-08-05 Halliburton Energy Services, Inc. Combined rheometer/mixer having helical blades and methods of determining rheological properties of fluids
US9359881B2 (en) 2011-12-08 2016-06-07 Marathon Oil Company Processes and systems for drilling a borehole
CA2877697A1 (en) * 2012-07-02 2014-01-09 Halliburton Energy Services, Inc. Pressure control in drilling operations with choke position determined by cv curve
US9482084B2 (en) 2012-09-06 2016-11-01 Exxonmobil Upstream Research Company Drilling advisory systems and methods to filter data
EP2904202A4 (en) * 2012-10-05 2016-06-22 Halliburton Energy Services Inc DETECTION OF VENUES AND LOSSES DURING DRILLING FROM A FLOATING BUILDING
SA113340567B1 (ar) 2012-10-26 2015-07-07 بيكر هوغيس انكوربوريتد نظام وطريقة لمعالجة بيانات بئر باستخدام تحليل بيانات توبولوجية.
MX360504B (es) 2012-12-05 2018-11-06 Schlumberger Technology Bv Control de perforacion con presion controlada.
GB2530416B (en) 2013-03-29 2019-12-25 Schlumberger Holdings Optimum flow control valve setting system and procedure
EP2816194A1 (de) * 2013-06-19 2014-12-24 Siemens Aktiengesellschaft Verfahren zur Durchführung eines Tiefbohrvorgangs
WO2015047256A1 (en) * 2013-09-25 2015-04-02 Halliburton Energy Services, Inc. Workflow adjustment methods and systems for logging operations
US9850712B2 (en) * 2013-12-12 2017-12-26 Schlumberger Technology Corporation Determining drilling state for trajectory control
CN104265270B (zh) * 2014-07-30 2015-10-28 中国石油集团钻井工程技术研究院 一种碳酸盐岩缝洞钻井轨迹设计及控制方法
US10678966B2 (en) * 2014-08-04 2020-06-09 Landmark Graphics Corporation Modeling casing/riser wear and friction factor using discrete inversion techniques
CN104265267B (zh) * 2014-09-19 2017-02-01 中国石油大学(华东) 适用于控压钻井的气液两相流量测量装置及测量方法
US9864353B2 (en) * 2015-06-18 2018-01-09 Schlumberger Technology Corporation Flow balancing for a well
WO2017044101A1 (en) 2015-09-10 2017-03-16 Halliburton Energy Services, Inc. Integrated rotating control device and gas handling system for a marine drilling system
GB2551141B (en) 2016-06-07 2020-05-13 Equinor Energy As Method and system for managed pressure drilling
US20200040719A1 (en) * 2016-10-05 2020-02-06 Schlumberger Technology Corporation Machine-Learning Based Drilling Models for A New Well
US10260331B2 (en) * 2016-11-03 2019-04-16 Nabors Drilling Technologies Usa, Inc. Autodrilling control with annulus pressure modification of differential pressure
CN106844924B (zh) * 2017-01-12 2021-02-23 桂林电子科技大学 基于响应曲面法和遗传算法优化pcb微带线结构的方法
US10538986B2 (en) * 2017-01-16 2020-01-21 Ensco International Incorporated Subsea pressure reduction manifold
US10036219B1 (en) 2017-02-01 2018-07-31 Chevron U.S.A. Inc. Systems and methods for well control using pressure prediction
US10968730B2 (en) 2017-07-25 2021-04-06 Exxonmobil Upstream Research Company Method of optimizing drilling ramp-up
US11131181B2 (en) 2017-10-09 2021-09-28 Exxonmobil Upstream Research Company Controller with automatic tuning and method
US20200240259A1 (en) * 2019-01-25 2020-07-30 Ge Inspection Technologies, Lp Flow network model analysis
US11499423B2 (en) 2019-05-16 2022-11-15 Saudi Arabian Oil Company Automated production optimization technique for smart well completions using real-time nodal analysis including comingled production calibration
US11326423B2 (en) * 2019-05-16 2022-05-10 Saudi Arabian Oil Company Automated production optimization technique for smart well completions using real-time nodal analysis including recommending changes to downhole settings
US11441395B2 (en) 2019-05-16 2022-09-13 Saudi Arabian Oil Company Automated production optimization technique for smart well completions using real-time nodal analysis including real-time modeling
KR102703179B1 (ko) * 2019-09-02 2024-09-04 현대자동차 주식회사 차량용 히트펌프 시스템
US11459866B2 (en) * 2019-09-24 2022-10-04 Bp Corporation North America Inc. Systems and methods for predicting a screen-out condition in an earthen formation
US11821289B2 (en) 2019-11-18 2023-11-21 Saudi Arabian Oil Company Automated production optimization technique for smart well completions using real-time nodal analysis

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3552502A (en) 1967-12-21 1971-01-05 Dresser Ind Apparatus for automatically controlling the killing of oil and gas wells
US5154078A (en) 1990-06-29 1992-10-13 Anadrill, Inc. Kick detection during drilling
US5303582A (en) * 1992-10-30 1994-04-19 New Mexico Tech Research Foundation Pressure-transient testing while drilling
US5444619A (en) * 1993-09-27 1995-08-22 Schlumberger Technology Corporation System and method of predicting reservoir properties
US6012015A (en) * 1995-02-09 2000-01-04 Baker Hughes Incorporated Control model for production wells
US5887657A (en) * 1995-02-09 1999-03-30 Baker Hughes Incorporated Pressure test method for permanent downhole wells and apparatus therefore
DK0857249T3 (da) * 1995-10-23 2006-08-14 Baker Hughes Inc Boreanlæg i lukket slöjfe
US6035952A (en) * 1996-05-03 2000-03-14 Baker Hughes Incorporated Closed loop fluid-handling system for use during drilling of wellbores
US5862863A (en) * 1996-08-26 1999-01-26 Swisher; Mark D. Dual completion method for oil/gas wells to minimize water coning
US6002985A (en) 1997-05-06 1999-12-14 Halliburton Energy Services, Inc. Method of controlling development of an oil or gas reservoir
US6101447A (en) * 1998-02-12 2000-08-08 Schlumberger Technology Corporation Oil and gas reservoir production analysis apparatus and method
US6853921B2 (en) 1999-07-20 2005-02-08 Halliburton Energy Services, Inc. System and method for real time reservoir management
US7222022B2 (en) 2000-07-19 2007-05-22 Schlumberger Technology Corporation Method of determining properties relating to an underbalanced well
US6585044B2 (en) * 2000-09-20 2003-07-01 Halliburton Energy Services, Inc. Method, system and tool for reservoir evaluation and well testing during drilling operations
US6474422B2 (en) 2000-12-06 2002-11-05 Texas A&M University System Method for controlling a well in a subsea mudlift drilling system
US20020112888A1 (en) * 2000-12-18 2002-08-22 Christian Leuchtenberg Drilling system and method
US6901391B2 (en) * 2001-03-21 2005-05-31 Halliburton Energy Services, Inc. Field/reservoir optimization utilizing neural networks
US7797139B2 (en) * 2001-12-07 2010-09-14 Chevron U.S.A. Inc. Optimized cycle length system and method for improving performance of oil wells
US7337660B2 (en) * 2004-05-12 2008-03-04 Halliburton Energy Services, Inc. Method and system for reservoir characterization in connection with drilling operations
US20060100836A1 (en) * 2004-11-09 2006-05-11 Amardeep Singh Performance forecasting and bit selection tool for drill bits
CN1786413A (zh) * 2005-11-17 2006-06-14 孟江 基于神经网络模型的矿井涌水量预测方法

Also Published As

Publication number Publication date
GB2479662A (en) 2011-10-19
GB0813422D0 (en) 2008-08-27
GB2479663B (en) 2011-11-30
GB2447820B (en) 2011-07-20
NO338495B1 (no) 2016-08-22
GB2447820A (en) 2008-09-24
CN101395545B (zh) 2011-03-16
CA2637584C (en) 2013-11-26
WO2008016717A2 (en) 2008-02-07
US7610251B2 (en) 2009-10-27
CA2637584A1 (en) 2008-02-07
GB2479662B (en) 2011-12-07
CN101395545A (zh) 2009-03-25
US20070168056A1 (en) 2007-07-19
GB201108127D0 (en) 2011-06-29
GB2479663A (en) 2011-10-19
GB201108125D0 (en) 2011-06-29
BRPI0707157A2 (pt) 2011-04-26
WO2008016717A3 (en) 2008-10-02

Similar Documents

Publication Publication Date Title
NO20083392L (no) Bronnkontrollsystem og tilhorende metoder
GB2457823A (en) System and method for performing oilfield simulation operations
GB2472919B (en) Adjustment of mud circulation when evaluating a formation
NO20081624L (no) Fremgangsmate for boring og produksjon av hydrokarboner fra undergrunnsformasjoner
MX346613B (es) Metodo y sistema para producción de presión de poro.
NO20070684L (no) Fremgangsmate ved simulering av boring i sann tid.
AU2017435486A1 (en) Measurement-while-drilling method and device for obtaining coal seam gas parameter
NO20161926A1 (no) Fremgangsmåte for å bestemme et sett med netto nåverdier for å påvirke boring av en brønn og øke produksjon
GB2460189A (en) System and method for performing oilfield drilling operations using visualization techniques
TW200600669A (en) Method and apparatus and program storage device adapted for automatic drill string design based on wellbore geometry and trajectory requirements
WO2009142782A3 (en) System and method for densely packing wells using magnetic ranging while drilling
WO2008070829A3 (en) Automated mse-based drilling apparatus and methods
NO20090024L (no) Fremgangsmate for forbedret bronnkontroll med en nedihullsanordning
NO20083767L (no) Fremgangsmate for kvantifisering av reservoarkonnektivitet ved anvendelse av fluid-reisetid
MY164436A (en) Method for determining formation fluid control events in a borehole using a dynamic annular pressure control system
WO2010062635A3 (en) Methods and apparatus for planning and dynamically updating sampling operations while drilling in a subterranean formation
EA201070985A1 (ru) Способ определения приемистости скважины по размещению отходов бурения
NO20090492L (no) Fremgangsmåter for å oppdage, forhindre og bøte på tapt sirkulasjonsfluid
NO20080518L (no) Anordning for posisjonering av boreenhet
WO2007112292A3 (en) Method for controlling fluid pressure in a borehole using a dynamic annular pressure control system
NO20100806L (no) Apparat og fremgangsmate for a kommunisere informasjon mellom en bronnboring og overflate
NO20073535L (no) Prediksjon av gjennomtrengningsrate ved bruk av bor-spesifikke koeffisienter for glidende friksjon og mekanisk effektivitet som funksjon av begrenset kompresjonsstyrke
WO2007124378A3 (en) Method of drilling from a shaft for underground recovery of hydrocarbons
NO20075124L (no) Fjellbor og fremgangsmate for bryting av fjell
NO20092740L (no) Utforming av boremonster for utboring av fjellrom

Legal Events

Date Code Title Description
MM1K Lapsed by not paying the annual fees