US20100006297A1 - Pipe string device for conveying a fluid from a well head to a vessel - Google Patents

Pipe string device for conveying a fluid from a well head to a vessel Download PDF

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Publication number
US20100006297A1
US20100006297A1 US12/373,628 US37362807A US2010006297A1 US 20100006297 A1 US20100006297 A1 US 20100006297A1 US 37362807 A US37362807 A US 37362807A US 2010006297 A1 US2010006297 A1 US 2010006297A1
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US
United States
Prior art keywords
fluid
pipe string
string assembly
sea
well head
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US12/373,628
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English (en)
Inventor
Roger Stave
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGR Subsea AS
Original Assignee
AGR Subsea AS
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 AGR Subsea AS filed Critical AGR Subsea AS
Assigned to AGR SUBSEA AS reassignment AGR SUBSEA AS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STAVE, ROGER
Publication of US20100006297A1 publication Critical patent/US20100006297A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/08—Pipe-line systems for liquids or viscous products
    • F17D1/12—Conveying liquids or viscous products by pressure of another fluid
    • 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
    • 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
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems

Definitions

  • the present inventor has recognized that, during the drilling for and the recovery of petroleum, it is often necessary to use a well fluid which is adapted for the conditions in the well with respect to, by way of example only and not by way of limitation, density and viscosity, among other things. It is common, for example, to use drilling fluid having a density of approximately 1.6 kg/l.
  • U.S. Pat. No. 6,745,851 discloses a pump-operated solution which can recover and recirculate drilling fluid.
  • the present inventor has recognised that during drilling at great depths offshore, the head from the drilling vessel down to the well formation may become so great that drilling fluid penetrates into the formation. Such a flow of drilling fluid into the formation is sometimes undesirable because, for example, relatively expensive drilling fluid is lost, and because an inflow of this kind may reduce the future productivity of a well.
  • a method which is sometimes utilized in offshore wells involves pumping drilling fluid, as it is returning from the borehole, out at the well head on the sea floor, then flowing it back to the vessel via a separate pipe.
  • the static pressure in the borehole can be controlled, for example, by controlling the liquid head in the riser, if such is installed, between the well head and vessel.
  • NO Patent 319213 discloses a method directed towards controlling the liquid pressure in the well by filling the upper portion of the riser with a fluid having a different density relative to the density of the drilling fluid.
  • the present inventor has recognised that at relatively great sea depths, at which the return pipe necessarily is long, the necessary pump pressure at the sea floor is relatively high because of the density and viscosity of the drilling fluid. It is difficult to achieve the necessary flow rate without having to use pipes of a relatively large diameter, which entails increased pipe weight and thereby considerably higher investment costs.
  • the present invention relates to a pipe string. More particularly, it relates to a pipe string for conveying a fluid from a well head to a vessel, in which, for technical reasons, the fluid located in the pipe string is to be given a flow boost, and in which the pipe string is provided along its length with at least one injection point for a driving fluid.
  • the injection point may be formed by a fluid-operated ejector.
  • the invention also includes a method of using the device.
  • a pipe string for conveying a fluid from a well head to a vessel, in which the fluid located in the pipe string is to be given a flow boost, wherein the pipe string is provided along its length with at least one injection point for a driving fluid.
  • the injection point may comprise a fluid-operated ejector.
  • One or more such injection points can be disposed at suitable intervals along the pipe string from the sea floor and up to the vessel.
  • the pipe string forms a separate flow path relative to a possible riser, in some embodiments.
  • a possible ejector located above will relieve the ejector located below, so that this ejector starts a flow feeding the ejector located above with fluid.
  • a pump may be arranged which pumps the fluid through the pipe string, wherein one or more ejectors at the upper portion of the pipe string form auxiliary apparatuses for a sufficient flow rate through the pipe string to be achieved.
  • the driving fluid has a lower density than the fluid located in the pipe string.
  • the overall liquid pressure within the fluid string at the sea floor will be reduced.
  • the gas may expand as it rises in the pipe string, thereby further reducing the overall liquid pressure within the pipe string at the sea floor.
  • the pipe string may be anchored on the sea floor and be provided with buoyancy bodies at its upper portion, and/or may be suspended from the vessel which then carries the weight of the pipe string.
  • the device and method according to the invention may provide a satisfactory flow rate in the pipe string, even with the use of a pipe string of a relatively small diameter.
  • FIG. 1 schematically presents a vessel which is provided with a pipe string in accordance with an exemplary embodiment of the invention.
  • FIG. 2 schematically presents the invention in an alternative embodiment.
  • a pipe string 1 which is connected at its lower end portion to a well head 2 on the sea floor 4 , and which is connected at its upper end portion to a separator 6 .
  • the separator 6 is located on a vessel 8 .
  • the vessel 8 is typically working a well 10 , which is in the ground, and is connected to the well 10 by a pipe connection 12 extending through the well head 2 .
  • the pipe connection 12 may comprise, in a manner known per se, one or more of drill pipe, marine riser, work riser or other well-intervention tools.
  • the pipe string 1 is anchored on the sea floor 4 by an anchor 14 .
  • a buoyancy body 18 which is arranged to take the weight of the pipe string 1 .
  • the pipe string 1 is provided with fluid-operated ejectors 20 suitably spaced apart, which are supplied with driving fluid from the vessel 8 via at least one driving-fluid pipe 22 .
  • the pressurized fluid supply via the driving-fluid pipe 22 from the vessel 8 to the ejectors 20 is opened.
  • the flow is started by each ejector 20 supplying the necessary pressure to the fluid until the fluid flows to the next ejector along the pipe string 1 .
  • the fluid enters the separator 6 , in which driving gases that may be present are separated from the rest of the fluid before the remaining fluid flows on for treatment in, for example, screening machines, not shown.
  • the return pressure at the well head 2 can be controlled by adjusting the driving-fluid pressure into the ejectors 20 .
  • a mechanical pump 24 is arranged at the lower portion of the pipe string 1 .
  • the ejectors 20 which are arranged at the upper portion of the pipe 1 , are used to increase the flow rate through the pipe string 1 beyond that effected by the pump 24 on its own.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Public Health (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Earth Drilling (AREA)
  • Pipeline Systems (AREA)
  • Air Transport Of Granular Materials (AREA)
US12/373,628 2006-07-14 2007-07-31 Pipe string device for conveying a fluid from a well head to a vessel Abandoned US20100006297A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20063269 2006-07-14
NO20063269A NO325931B1 (no) 2006-07-14 2006-07-14 Anordning og fremgangsmate ved stromningshjelp i en rorledning
PCT/NO2007/000269 WO2008007973A1 (en) 2006-07-14 2007-07-13 Pipe string device for conveying a fluid from a well head to a vessel

Publications (1)

Publication Number Publication Date
US20100006297A1 true US20100006297A1 (en) 2010-01-14

Family

ID=38923461

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/373,628 Abandoned US20100006297A1 (en) 2006-07-14 2007-07-31 Pipe string device for conveying a fluid from a well head to a vessel

Country Status (7)

Country Link
US (1) US20100006297A1 (es)
EP (1) EP2041477A1 (es)
BR (1) BRPI0714138A2 (es)
CA (1) CA2657557A1 (es)
MX (1) MX2009000458A (es)
NO (1) NO325931B1 (es)
WO (1) WO2008007973A1 (es)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080105434A1 (en) * 2006-11-07 2008-05-08 Halliburton Energy Services, Inc. Offshore Universal Riser System
US20090166344A1 (en) * 2005-09-08 2009-07-02 Pauli Hamalainen Method and Apparatus for Short-Arc Welding
US20110061872A1 (en) * 2009-09-10 2011-03-17 Bp Corporation North America Inc. Systems and methods for circulating out a well bore influx in a dual gradient environment
US20110089144A1 (en) * 2008-07-03 2011-04-21 Esab Ab Device for handling powder for a welding apparatus
US20110203802A1 (en) * 2010-02-25 2011-08-25 Halliburton Energy Services, Inc. Pressure control device with remote orientation relative to a rig
US20110278014A1 (en) * 2010-05-12 2011-11-17 William James Hughes External Jet Pump for Dual Gradient Drilling
US8162063B2 (en) * 2010-09-03 2012-04-24 Stena Drilling Ltd. Dual gradient drilling ship
US8201628B2 (en) 2010-04-27 2012-06-19 Halliburton Energy Services, Inc. Wellbore pressure control with segregated fluid columns
US8281875B2 (en) 2008-12-19 2012-10-09 Halliburton Energy Services, Inc. Pressure and flow control in drilling operations
KR101311000B1 (ko) * 2013-01-11 2013-09-24 주식회사 지앤지테크놀러지 지하수 굴착공 국소배출 및 침전 토사 제거를 위한 장치 및 방법
US8739863B2 (en) 2010-11-20 2014-06-03 Halliburton Energy Services, Inc. Remote operation of a rotating control device bearing clamp
US8820405B2 (en) 2010-04-27 2014-09-02 Halliburton Energy Services, Inc. Segregating flowable materials in a well
US8833488B2 (en) 2011-04-08 2014-09-16 Halliburton Energy Services, Inc. Automatic standpipe pressure control in drilling
US9080407B2 (en) 2011-05-09 2015-07-14 Halliburton Energy Services, Inc. Pressure and flow control in drilling operations
US9163473B2 (en) 2010-11-20 2015-10-20 Halliburton Energy Services, Inc. Remote operation of a rotating control device bearing clamp and safety latch
US9249637B2 (en) * 2012-10-15 2016-02-02 National Oilwell Varco, L.P. Dual gradient drilling system
US9447647B2 (en) 2011-11-08 2016-09-20 Halliburton Energy Services, Inc. Preemptive setpoint pressure offset for flow diversion in drilling operations
US9605507B2 (en) 2011-09-08 2017-03-28 Halliburton Energy Services, Inc. High temperature drilling with lower temperature rated tools

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US3815673A (en) * 1972-02-16 1974-06-11 Exxon Production Research Co Method and apparatus for controlling hydrostatic pressure gradient in offshore drilling operations
US4063602A (en) * 1975-08-13 1977-12-20 Exxon Production Research Company Drilling fluid diverter system
US4291772A (en) * 1980-03-25 1981-09-29 Standard Oil Company (Indiana) Drilling fluid bypass for marine riser
US4738313A (en) * 1987-02-20 1988-04-19 Delta-X Corporation Gas lift optimization
US4967843A (en) * 1987-09-29 1990-11-06 Institut Francais Du Petrole Device for producing an effluent contained in a submarine geological formation and production method employed using such a device
US6142236A (en) * 1998-02-18 2000-11-07 Vetco Gray Inc Abb Method for drilling and completing a subsea well using small diameter riser
US6216799B1 (en) * 1997-09-25 2001-04-17 Shell Offshore Inc. Subsea pumping system and method for deepwater drilling
US6286602B1 (en) * 1998-09-21 2001-09-11 Elf Exploration Production Method for controlling a device for transporting hydrocarbons between production means and a treatment plant
US6415877B1 (en) * 1998-07-15 2002-07-09 Deep Vision Llc Subsea wellbore drilling system for reducing bottom hole pressure
US6457529B2 (en) * 2000-02-17 2002-10-01 Abb Vetco Gray Inc. Apparatus and method for returning drilling fluid from a subsea wellbore
US6530437B2 (en) * 2000-06-08 2003-03-11 Maurer Technology Incorporated Multi-gradient drilling method and system
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
US6668943B1 (en) * 1999-06-03 2003-12-30 Exxonmobil Upstream Research Company Method and apparatus for controlling pressure and detecting well control problems during drilling of an offshore well using a gas-lifted riser
US20040065440A1 (en) * 2002-10-04 2004-04-08 Halliburton Energy Services, Inc. Dual-gradient drilling using nitrogen injection
US6745851B1 (en) * 1999-08-20 2004-06-08 Agr Services As Methods and system for processing of drilling fluid
US6802379B2 (en) * 2001-02-23 2004-10-12 Exxonmobil Upstream Research Company Liquid lift method for drilling risers
US6814142B2 (en) * 2002-10-04 2004-11-09 Halliburton Energy Services, Inc. Well control using pressure while drilling measurements
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
US6877565B2 (en) * 1998-05-26 2005-04-12 Agr Services As Arrangement for the removal of cuttings and gas arising from drilling operations
US6926101B2 (en) * 2001-02-15 2005-08-09 Deboer Luc System and method for treating drilling mud in oil and gas well drilling applications
US6966392B2 (en) * 2001-02-15 2005-11-22 Deboer Luc Method for varying the density of drilling fluids in deep water oil and gas 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
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
US20070119621A1 (en) * 2003-11-27 2007-05-31 Agr Subsea As Method and device for controlling drilling fluid pressure
US7264058B2 (en) * 2001-09-10 2007-09-04 Ocean Riser Systems As Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells
US7270185B2 (en) * 1998-07-15 2007-09-18 Baker Hughes Incorporated Drilling system and method for controlling equivalent circulating density during drilling of wellbores

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NO171330C (no) * 1990-07-13 1993-02-24 Kvaerner Eng Fremgangsmaate for aa oeke trykket i en broennstroem, og anlegg for oeking av trykket i en broennstroem
CN1375037A (zh) * 1999-09-15 2002-10-16 国际壳牌研究有限公司 用来提高井中流体流量的系统
WO2001065056A1 (en) * 2000-03-02 2001-09-07 Shell Internationale Research Maatschappij B.V. Wireless downhole measurement and control for optimizing gas lift well and field performance
NO313261B1 (no) * 2001-02-02 2002-09-09 Carsten Andersen Fremgangsmåte og anordning til håndtering av marine organismer og anvendelse av fremgangsmåte og anordning
US6966367B2 (en) * 2002-01-08 2005-11-22 Weatherford/Lamb, Inc. Methods and apparatus for drilling with a multiphase pump
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GB0407659D0 (en) * 2004-04-03 2004-05-05 Frontier Engineering Solutions Method and apparatus

Patent Citations (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815673A (en) * 1972-02-16 1974-06-11 Exxon Production Research Co Method and apparatus for controlling hydrostatic pressure gradient in offshore drilling operations
US4063602A (en) * 1975-08-13 1977-12-20 Exxon Production Research Company Drilling fluid diverter system
US4291772A (en) * 1980-03-25 1981-09-29 Standard Oil Company (Indiana) Drilling fluid bypass for marine riser
US4738313A (en) * 1987-02-20 1988-04-19 Delta-X Corporation Gas lift optimization
US4967843A (en) * 1987-09-29 1990-11-06 Institut Francais Du Petrole Device for producing an effluent contained in a submarine geological formation and production method employed using such a device
US6216799B1 (en) * 1997-09-25 2001-04-17 Shell Offshore Inc. Subsea pumping system and method for deepwater drilling
US6142236A (en) * 1998-02-18 2000-11-07 Vetco Gray Inc Abb Method for drilling and completing a subsea well using small diameter riser
US6877565B2 (en) * 1998-05-26 2005-04-12 Agr Services As Arrangement for the removal of cuttings and gas arising from drilling operations
US6415877B1 (en) * 1998-07-15 2002-07-09 Deep Vision Llc Subsea wellbore drilling system for reducing bottom hole pressure
US7270185B2 (en) * 1998-07-15 2007-09-18 Baker Hughes Incorporated Drilling system and method for controlling equivalent circulating density during drilling of wellbores
US6648081B2 (en) * 1998-07-15 2003-11-18 Deep Vision Llp Subsea wellbore drilling system for reducing bottom hole pressure
US6854532B2 (en) * 1998-07-15 2005-02-15 Deep Vision Llc Subsea wellbore drilling system for reducing bottom hole pressure
US6286602B1 (en) * 1998-09-21 2001-09-11 Elf Exploration Production Method for controlling a device for transporting hydrocarbons between production means and a treatment plant
US6668943B1 (en) * 1999-06-03 2003-12-30 Exxonmobil Upstream Research Company Method and apparatus for controlling pressure and detecting well control problems during drilling of an offshore well using a gas-lifted riser
US6745851B1 (en) * 1999-08-20 2004-06-08 Agr Services As Methods and system for processing of drilling fluid
US6457529B2 (en) * 2000-02-17 2002-10-01 Abb Vetco Gray Inc. Apparatus and method for returning drilling fluid from a subsea wellbore
US6530437B2 (en) * 2000-06-08 2003-03-11 Maurer Technology Incorporated Multi-gradient drilling method and system
US6926101B2 (en) * 2001-02-15 2005-08-09 Deboer Luc System and method for treating drilling mud in oil and gas well drilling applications
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
US6966392B2 (en) * 2001-02-15 2005-11-22 Deboer Luc Method for varying the density of drilling fluids in deep water oil and gas 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
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
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
US6802379B2 (en) * 2001-02-23 2004-10-12 Exxonmobil Upstream Research Company Liquid lift method for drilling risers
US7264058B2 (en) * 2001-09-10 2007-09-04 Ocean Riser Systems As Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells
US7497266B2 (en) * 2001-09-10 2009-03-03 Ocean Riser Systems As Arrangement and method for controlling and regulating bottom hole pressure when drilling deepwater offshore wells
US6814142B2 (en) * 2002-10-04 2004-11-09 Halliburton Energy Services, Inc. Well control using pressure while drilling measurements
US20040065440A1 (en) * 2002-10-04 2004-04-08 Halliburton Energy Services, Inc. Dual-gradient drilling using nitrogen injection
US20070119621A1 (en) * 2003-11-27 2007-05-31 Agr Subsea As Method and device for controlling drilling fluid pressure

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090166344A1 (en) * 2005-09-08 2009-07-02 Pauli Hamalainen Method and Apparatus for Short-Arc Welding
US8033335B2 (en) 2006-11-07 2011-10-11 Halliburton Energy Services, Inc. Offshore universal riser system
US20080105434A1 (en) * 2006-11-07 2008-05-08 Halliburton Energy Services, Inc. Offshore Universal Riser System
US20110089144A1 (en) * 2008-07-03 2011-04-21 Esab Ab Device for handling powder for a welding apparatus
US8704120B2 (en) * 2008-07-03 2014-04-22 Esab Ab Device for handling powder for a welding apparatus
US20120097643A9 (en) * 2008-07-03 2012-04-26 Esab Ab Device for handling powder for a welding apparatus
US8281875B2 (en) 2008-12-19 2012-10-09 Halliburton Energy Services, Inc. Pressure and flow control in drilling operations
US20110061872A1 (en) * 2009-09-10 2011-03-17 Bp Corporation North America Inc. Systems and methods for circulating out a well bore influx in a dual gradient environment
US8517111B2 (en) * 2009-09-10 2013-08-27 Bp Corporation North America Inc. Systems and methods for circulating out a well bore influx in a dual gradient environment
US8286730B2 (en) 2009-12-15 2012-10-16 Halliburton Energy Services, Inc. Pressure and flow control in drilling operations
US8397836B2 (en) 2009-12-15 2013-03-19 Halliburton Energy Services, Inc. Pressure and flow control in drilling operations
US9169700B2 (en) 2010-02-25 2015-10-27 Halliburton Energy Services, Inc. Pressure control device with remote orientation relative to a rig
US20110203802A1 (en) * 2010-02-25 2011-08-25 Halliburton Energy Services, Inc. Pressure control device with remote orientation relative to a rig
US8261826B2 (en) 2010-04-27 2012-09-11 Halliburton Energy Services, Inc. Wellbore pressure control with segregated fluid columns
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
US8403059B2 (en) * 2010-05-12 2013-03-26 Sunstone Technologies, Llc External jet pump for dual gradient drilling
US20110278014A1 (en) * 2010-05-12 2011-11-17 William James Hughes External Jet Pump for Dual Gradient Drilling
US8162063B2 (en) * 2010-09-03 2012-04-24 Stena Drilling Ltd. Dual gradient drilling ship
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
US10145199B2 (en) 2010-11-20 2018-12-04 Halliburton Energy Services, Inc. Remote operation of a rotating control device bearing clamp and safety latch
US8833488B2 (en) 2011-04-08 2014-09-16 Halliburton Energy Services, Inc. Automatic standpipe pressure control in drilling
US9080407B2 (en) 2011-05-09 2015-07-14 Halliburton Energy Services, Inc. Pressure and flow control in drilling operations
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
US10233708B2 (en) 2012-04-10 2019-03-19 Halliburton Energy Services, Inc. Pressure and flow control in drilling operations
US9249637B2 (en) * 2012-10-15 2016-02-02 National Oilwell Varco, L.P. Dual gradient drilling system
KR101311000B1 (ko) * 2013-01-11 2013-09-24 주식회사 지앤지테크놀러지 지하수 굴착공 국소배출 및 침전 토사 제거를 위한 장치 및 방법

Also Published As

Publication number Publication date
EP2041477A1 (en) 2009-04-01
BRPI0714138A2 (pt) 2012-12-25
NO20063269L (no) 2008-01-15
WO2008007973A1 (en) 2008-01-17
CA2657557A1 (en) 2008-01-17
MX2009000458A (es) 2009-01-27
NO325931B1 (no) 2008-08-18

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