专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

DE60219185D1 未知
公开(公告)号：DE60219185D1
公开(公告)日：2007-05-10
申请号：DE60219185
申请日：2002-12-31
申请人： SCHLUMBERGER SERVICES PETROL
发明人： WRAIGHT PETER , GRIFFITHS ROGER , STEPHENSON KENNETH E
IPC分类号： E21B47/11 , E21B47/00 , E21B47/08 , E21B47/10 , G01V5/10
摘要： The invention relates to methods and apparatus for determining downhole mud flow rates and other downhole parameters. A method for determining a downhole parameter includes operating a pulsed neutron generator (6), pulsing the pulsed neutron generator (6) off, detecting a substantially unactivated drilling fluid slug at a known distance (d) from the pulsed neutron generator (6), and determining a time-of-flight (t) for the unactivated drilling fluid slug to travel from the pulsed neutron generator (6) to a detection point.

12. 发明专利

AT358226T 未知
公开(公告)号：AT358226T
公开(公告)日：2007-04-15
申请号：AT02293280
申请日：2002-12-31
申请人： SCHLUMBERGER SERVICES PETROL
发明人： WRAIGHT PETER , GRIFFITHS ROGER , STEPHENSON KENNETH E
IPC分类号： E21B47/11 , E21B47/00 , E21B47/08 , E21B47/10 , G01V5/10
摘要： The invention relates to methods and apparatus for determining downhole mud flow rates and other downhole parameters. A method for determining a downhole parameter includes operating a pulsed neutron generator (6), pulsing the pulsed neutron generator (6) off, detecting a substantially unactivated drilling fluid slug at a known distance (d) from the pulsed neutron generator (6), and determining a time-of-flight (t) for the unactivated drilling fluid slug to travel from the pulsed neutron generator (6) to a detection point.

13. 发明专利

NO974731A 未知
公开(公告)号：NO974731A
公开(公告)日：1998-04-14
申请号：NO974731
申请日：1997-10-13
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： STEPHENSON KENNETH E , BECKER ARTHUR J
IPC分类号： G01N23/22 , G01N23/12
CPC分类号： G01N23/22

14. 发明专利

NO952540D0 未知
公开(公告)号：NO952540D0
公开(公告)日：1995-06-23
申请号：NO952540
申请日：1995-06-23
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： ROSCOE BRADLEY A , SCHWEITZER JEFFREY S , STEPHENSON KENNETH E
IPC分类号： E21B47/10 , G01F1/708 , G01P
摘要： A method of measuring flow velocities in flowing fluids includes injecting into the flow a non-radioactive tracer having a neutron capture cross section higher than that of the flowing fluids, for example a gadolinium compound, and measuring the neutron capture cross section in the fluid downstream of the injection point to detect the passage of the tracer and hence determine the time of flight. By making the tracer miscible with only one phase (typically the continuous phase) of a multi-phase fluid, it is possible to measure the flow velocity of that phase. The neutron capture cross section can be measured by irradiating with neutrons from a pulsed neutron generator and measuring capture gamma rays with a scintillation detector.

15. 发明专利

DE69116260D1 未知
公开(公告)号：DE69116260D1
公开(公告)日：1996-02-22
申请号：DE69116260
申请日：1991-07-26
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： STEPHENSON KENNETH E
IPC分类号： H05H5/02 , G01V5/00 , H05H5/04 , H05H5/00 , H05H9/00
摘要： A particle accelerator comprises a Cockcroft-Walton voltage multiplier that provides linear axial and radial fields. The Cockcroft-Walton voltage multiplier includes capacitors that are arranged radially relative to one another, such that a linear voltage increase occurs between the capacitors. The particle accelerator is made by placing conductive foils on an insulating sheet, connecting the foils as a Cockcroft-Walton voltage multiplier, and rolling the insulating sheet with the foils into a cylinder to form the radially arranged capacitors.

16. 发明专利

NO952540A 未知
公开(公告)号：NO952540A
公开(公告)日：1995-12-28
申请号：NO952540
申请日：1995-06-23
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： ROSCOE BRADLEY A , SCHWEITZER JEFFREY S , STEPHENSON KENNETH E
IPC分类号： E21B47/10 , G01F1/708 , G01P5/00
CPC分类号： E21B47/1015 , G01F1/708

17. 发明专利

AU648814B2 Electrostatic particle generator having linear axial and radial fields 未知
公开(公告)号：AU648814B2
公开(公告)日：1994-05-05
申请号：AU8252691
申请日：1991-08-16
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： STEPHENSON KENNETH E
IPC分类号： H05H5/02 , G01V5/00 , H05H5/04 , H05H9/00
摘要： A particle accelerator comprises a Cockcroft-Walton voltage multiplier that provides linear axial and radial fields. The Cockcroft-Walton voltage multiplier includes capacitors that are arranged radially relative to one another, such that a linear voltage increase occurs between the capacitors. The particle accelerator is made by placing conductive foils on an insulating sheet, connecting the foils as a Cockcroft-Walton voltage multiplier, and rolling the insulating sheet with the foils into a cylinder to form the radially arranged capacitors.

18. 发明专利

DE69533850D1 未知
公开(公告)号：DE69533850D1
公开(公告)日：2005-01-20
申请号：DE69533850
申请日：1995-04-06
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： STEPHENSON KENNETH E
IPC分类号： G01V5/10
摘要： A method of determining a characteristic comprising irradiating the formation with high energy neutrons and detecting neutrons scattered by the formation having energies above epithermal to determine the nature of the formation matrix. Epithermal neutrons can also be detected to determine formation porosity. Apparatus comprises a high energy neutron source, typically a D-T accelerator (32) producing 14 MeV neutrons, and detectors (34, 38) comprising He filled proportional counters far detecting neutrons having energies above epithermal and He filled proportional counters (37) for detecting epithermal neutrons.

19. 发明专利

NO992585L 未知
公开(公告)号：NO992585L
公开(公告)日：1999-07-28
申请号：NO992585
申请日：1999-05-28
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： STEPHENSON KENNETH E , THERON BERNARD
IPC分类号： E21B47/10 , G01F1/708 , G01F1/712 , G01F1/74 , E21B , E21B49/08
摘要： Once an oil well has been drilled and is producing, it is desirable to monitor the rate at which oil or gas is being delivered. It is particularly useful to know when there is a change in a fluid's output rate, for that can indicate problems with the well. This monitoring is known as "production logging". Prior to the introduction of horizontal well drilling, most wells were either vertical or only slightly deviated. However, many present-day wells have long horizontal or nearly-horizontal portions, and the techniques used to measure flow in vertical wells are not applicable to horizontal wells. Moreover, any flow rate measurement technique to be used downhole should take account not only of the several sorts of "lined" wells but also the "barefoot" ones.The invention seeks to satisfy this need for a technique that can be employed with all these sorts of completed well by utilizing a pair of correlated spaced sensors (that can detect "directly" the difference between gas and liquid (oil and/or water), which sensor pair is carried on a logging tool positioned within the borehole itself such that the individual sensors are disposed so as to be actually in the path of any gas bubbles likely to be in the fluid. The correlated output of the sensor pair allows a determination of the gas flow velocity, and if at the same time measurements are taken that provides an indication of the hold-up of the gas bubbles there may by calculation be determined the flow rate both of the gas and of the fluid.

20. 发明专利

NO992585A 未知
公开(公告)号：NO992585A
公开(公告)日：1999-07-28
申请号：NO992585
申请日：1999-05-28
申请人： SCHLUMBERGER TECHNOLOGY BV
发明人： STEPHENSON KENNETH E , THERON BERNARD
IPC分类号： E21B47/10 , G01F1/708 , G01F1/712 , G01F1/74 , E21B , E21B49/08
CPC分类号： G01F1/74 , E21B47/1015 , E21B47/102 , G01F1/708 , G01F1/712

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式