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42. 发明专利

NO323620B1 未知
公开(公告)号：NO323620B1
公开(公告)日：2007-06-18
申请号：NO20025655
申请日：2002-11-25
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： POP JULIAN J , FOLLINI JEAN-MARC
IPC分类号： E21B17/10 , E21B47/06 , E21B49/10
摘要： A downhole tool for collecting data from a subsurface formation is disclosed. The tool is provided with a probe for testing and/or sampling an adjacent formation. The tool is also provided with a protector positioned about the probe for engaging and protecting the sidewall of the bore hole surrounding the probe. The protector prevents deterioration of the wellbore during the testing and/or sampling by the probe.

45. 发明专利

AU2004237814A1 Method for determining pressure of earth formations 未知
公开(公告)号：AU2004237814A1
公开(公告)日：2005-08-18
申请号：AU2004237814
申请日：2004-12-08
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： HAMMOND PAUL S , POP JULIAN J , ZAZOVSKY ALEXANDER
IPC分类号： E21B47/06 , E21B47/10 , E21B49/00 , G01V1/145 , G01V1/44
摘要： A method for determining formation pressure at a depth region of formations surrounding a borehole, including: keeping track of the time since cessation of drilling at the depth region; deriving formation permeability at the depth region; causing wellbore pressure to vary periodically in time and determining, at the depth region, the periodic and non-periodic component of pressure measured in the formations; determining, using the time, the periodic component and the permeability, the formation pressure diffusivity and transmissibility and an estimate of the size of the pressure build-up zone around the wellbore at the depth region; determining, using the time, the formation pressure diffusivity and transmissibility, and the non-periodic component, the leak-off rate of the mudcake at the depth region; determining, using the leak-off rate, the pressure gradient at the depth region; and extrapolating, using the pressure gradient and the size of the build-up zone, to determine the formation pressure.

47. 发明专利

NO20045471D0 未知
公开(公告)号：NO20045471D0
公开(公告)日：2004-12-15
申请号：NO20045471
申请日：2004-12-15
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： POP JULIAN J , HAMMOND PAUL S , ZAZOVSKY ALEXANDER
IPC分类号： E21B47/06 , E21B47/10 , E21B49/00 , E21B
摘要： A method for determining formation pressure at a depth region of formations surrounding a borehole, including: keeping track of the time since cessation of drilling at the depth region; deriving formation permeability at the depth region; causing wellbore pressure to vary periodically in time and determining, at the depth region, the periodic and non-periodic component of pressure measured in the formations; determining, using the time, the periodic component and the permeability, the formation pressure diffusivity and transmissibility and an estimate of the size of the pressure build-up zone around the wellbore at the depth region; determining, using the time, the formation pressure diffusivity and transmissibility, and the non-periodic component, the leak-off rate of the mudcake at the depth region; determining, using the leak-off rate, the pressure gradient at the depth region; and extrapolating, using the pressure gradient and the size of the build-up zone, to determine the formation pressure.

50. 发明专利

AU2013345189A1 While drilling valve system 未知
公开(公告)号：AU2013345189A1
公开(公告)日：2015-05-28
申请号：AU2013345189
申请日：2013-11-04
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： HARMS KENT DAVID , MURPHY JEREMY T , STUCKER MICHAEL J , BRENNAN III WILLIAM E , HOEFEL ALBERT , VILLAREAL STEVEN G , POP JULIAN J
IPC分类号： E21B21/10 , E21B21/08
摘要： A system includes a valve subassembly configured to be disposed along an internal flowline exit of a first internal flowline within a downhole drilling module. The valve subassembly includes an active valve configured to regulate flow of a fluid through the internal flowline exit and a passive valve configured to be passively controlled based on a differential pressure between a first volume of the downhole drilling module and a second volume surrounding the downhole drilling module.

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