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11. 发明专利

CA2678650A1 SINGLE DRIVE BETATRON 未知
公开(公告)号：CA2678650A1
公开(公告)日：2009-06-25
申请号：CA2678650
申请日：2008-09-25
申请人： SCHLUMBERGER CA LTD
发明人： CHEN FELIX
IPC分类号： H05H11/00 , H05H11/04
摘要： A betatron includes a betatron magnet with a first guide magnet having a first pole face and a second guide magnet having a second pole face. Both th e first and the second guide magnet have a centrally disposed aperture and t he first pole face is separated from the second pole face by a guide magnet gap. A core is disposed within the centrally disposed apertures in an abutti ng relationship with both guide magnets. The core has at least one core gap. A drive coil is wound around both guide magnet pole faces. An orbit control coil has a contraction coil portion wound around the core gap and a bias co ntrol portion wound around the guide magnet pole faces. The contraction coil portion and the bias control portion are connected but in opposite polarity . Magnet fluxes in the core and guide magnets return through peripheral port ions of the betatron magnet.

12. 发明专利

CA2684005C METHOD OF COMPENSATING FOR THE PHOTOELECTRIC EFFECT IN PULSED, ACCELERATOR-BASED LITHO-DENSITY TOOL 未知
公开(公告)号：CA2684005C
公开(公告)日：2013-01-29
申请号：CA2684005
申请日：2008-09-30
申请人： SCHLUMBERGER CA LTD
发明人： ZHOU TONG , CHEN FELIX , CASE CHARLES R , ELLIS DARWIN V , ROSCOE BRADLEY ALBERT
IPC分类号： G01V5/12
摘要： A method for a pulsed gamma - gamma density tool to simultaneously compensate for interactions due to the photoelectric effect and density variations caused by standoff enables a more precise determination of bulk formation density. This method includes the steps of providing a source of energetic particles and directing those energetic particles at a formation having a known photoelectric factor and electron density and capturing one or more photons either emitted or deflected from the formation either a first detector or a second detector. The first detector is spaced a first distance from the source, the second detector is spaced a second distance from the detector and a third distance separates the first detector from the second detector. Measuring a first total energy of the photons striking the first detector during a time interval and measuring a second total energy of the photons striking the second detector as a function of the time interval and disposing a first filter between the first detector and the formation effective to cause Pe response to match standoff influence thereby compensating for both effects simultaneously. In addition to the first filter, the required compensation may include a second filter between the second detector and the formation as well as adjustments to the respective first distance, second distance and third distance.

13. 发明专利

CA2470512C APPARATUS AND METHODS FOR DOWNHOLE DETERMINATION OF CHARACTERISTICS OF FORMATION FLUIDS 未知
公开(公告)号：CA2470512C
公开(公告)日：2011-01-25
申请号：CA2470512
申请日：2002-12-05
申请人： SCHLUMBERGER CA LTD
发明人： CHEN FELIX , CORRIS GARY , MULLINS OLIVER , WU XU , FITZGERALD JOHN , GOODWIN ANTHONY R H
IPC分类号： E21B49/08 , E21B47/00 , G01N23/06 , G01N23/08 , G01N23/12 , G01N33/28 , G01V5/08 , G01V5/12
摘要： An oil sample is subjected to nuclear electromagnetic irradiation downhole, and the electron and/or mass density of the oil sample is determined by measuring the attenuation of the irradiation and relating the attenuation to the electron density. If the irradiation is high energy gamma ray irradiation, the attenuation is considered to be a function of Compton scattering only, which in turn is related to the electron density of the sample. If X-rays are utilized, attenuation is preferably measured in two energy windows. Using the two different attenuation values found in the different windows, the attenuation due to Compton scattering can be found and related to the electron and/or mass density of the sample. In addition, attenuation due to photoelectric absorption may also be determined and related to the presence of one or more heavy elements in the oil (e.g., sulfur) and/or sanding.

14. 发明专利

CA2678650C SINGLE DRIVE BETATRON 未知
公开(公告)号：CA2678650C
公开(公告)日：2014-05-06
申请号：CA2678650
申请日：2008-09-25
申请人： SCHLUMBERGER CA LTD
发明人： CHEN FELIX
IPC分类号： H05H11/00 , H05H11/04
摘要： A betatron includes a betatron magnet with a first guide magnet having a first pole face and a second guide magnet having a second pole face. Both the first and the second guide magnet have a centrally disposed aperture and the first pole face is separated from the second pole face by a guide magnet gap. A core is disposed within the centrally disposed apertures in an abutting relationship with both guide magnets. The core has at least one core gap. A drive coil is wound around both guide magnet pole faces. An orbit control coil has a contraction coil portion wound around the core gap and a bias control portion wound around the guide magnet pole faces. The contraction coil portion and the bias control portion are connected but in opposite polarity. Magnet fluxes in the core and guide magnets return through peripheral portions of the betatron magnet.

15. 发明专利

CA2684005A1 METHOD OF EXTRACTING FORMATION DENSITY AND PE USING A PULSEDACCELERATOR BASED LITHO-DENSITY TOOL 未知
公开(公告)号：CA2684005A1
公开(公告)日：2009-05-07
申请号：CA2684005
申请日：2008-09-30
申请人： SCHLUMBERGER CA LTD
发明人： CASE CHARLES R , ELLIS DARWIN V , CHEN FELIX , ZHOU TONG , ROSCOE BRADLEY ALBERT
IPC分类号： G01V5/12
摘要： A method for a pulsed gamma - gamma density tool to simultaneously compen sate for interactions due to the photoelectric effect and density variations caused by standoff enables a more precise determination of bulk formation d ensity. This method includes the steps of providing a source of energetic pa rticles and directing those energetic particles at a formation having a know n photoelectric factor and electron density and capturing one or more photon s either emitted or deflected from the formation either a first detector or a second detector. The first detector is spaced a first distance from the so urce, the second detector is spaced a second distance from the detector and a third distance separates the first detector from the second detector. Meas uring a first total energy of the photons striking the first detector during a time interval and measuring a second total energy of the photons striking the second detector as a function of the time interval and disposing a firs t filter between the first detector and the formation effective to cause Pe response to match standoff influence thereby compensating for both effects s imultaneously. In addition to the first filter, the required compensation ma y include a second filter between the second detector and the formation as w ell as adjustments to the respective first distance, second distance and thi rd distance.

16. 发明专利

CA2470512A1 APPARATUS AND METHODS FOR DOWNHOLE DETERMINATION OF CHARACTERISTICS OF FORMATION FLUIDS 未知
公开(公告)号：CA2470512A1
公开(公告)日：2003-06-19
申请号：CA2470512
申请日：2002-12-05
申请人： SCHLUMBERGER CA LTD
发明人： MULLINS OLIVER , WU XU , FITZGERALD JOHN , CHEN FELIX , GOODWIN ANTHONY R H , CORRIS GARY
IPC分类号： E21B47/00 , E21B49/08 , G01N23/06 , G01N23/08 , G01N23/12 , G01N33/28 , G01V5/08 , G01V5/12
摘要： An oil sample is subjected to nuclear electromagnetic irradiation downhole, and the electron and/or mass density of the oil sample is determined by measuring the attenuation of the irradiation and relating the attenuation to the electron density. If the irradiation is high energy gamma ray irradiatio n, the attenuation is considered to be a function of Compton scattering only, which in turn is related to the electron density of the sample. If X-rays ar e utilized, attenuation is preferably measured in two energy windows. Using th e two different attenuation values found in the different windows, the attenuation due to Compton scattering can be found and related to the electr on and/or mass density of the sample. In addition, attenuation due to photoelectric absorption may also be determined and related to the presence of one or more heavy elements in the oil (e.g., sulfur) and/or sanding.

17. 发明专利

CA2634030C METHOD AND APPARATUS FOR IN-SITU SIDE-WALL CORE SAMPLE ANALYSIS 未知
公开(公告)号：CA2634030C
公开(公告)日：2013-10-22
申请号：CA2634030
申请日：2006-12-04
申请人： SCHLUMBERGER CA LTD
发明人： FUJISAWA GO , MULLINS OLIVER C , WRAIGHT PETER DAVID , GROVES JOEL LEE , REID LENNOX , CHEN FELIX , CORRIS GARY , SONG YI-QIAO
IPC分类号： E21B49/06
摘要： A wireline-conveyed side-wall core coring tool (171) for acquiring side-wall core from a geological formation for performing in-situ side-wall core analysis. The coring tool has a core analysis unit operable to measure geophysical properties of an acquired side-wall core. The measured geophysical properties may be used to determine the success of the acquisition of side-wall cores by the coring tool. The core analysis unit (131) is operable of performing an in-situ interpretation of measured geophysical property of the side-wall core (123) and transmitting in near real-time the measurements or the interpretation results to surface data acquisition and processing apparatus (105).

18. 发明专利

GB2399167B Apparatus and methods for downhole determination of characteristics of formation fluids 未知
公开(公告)号：GB2399167B
公开(公告)日：2006-02-22
申请号：GB0411510
申请日：2002-12-05
申请人： SCHLUMBERGER HOLDINGS
发明人： CHEN FELIX , CORRIS GARY , MULLINS OLIVER , WU XU , FITZGERALD JOHN , GOODWIN ANTHONY R H
IPC分类号： E21B49/08 , E21B47/00 , G01N23/06 , G01N23/08 , G01N23/12 , G01N33/28 , G01V5/08 , G01V5/12
摘要： An oil sample is subjected to nuclear electromagnetic irradiation downhole, and the electron and/or mass density of the oil sample is determined by measuring the attenuation of the irradiation and relating the attenuation to the electron density. If the irradiation is high energy gamma ray irradiation, the attenuation is considered to be a function of Compton scattering only, which in turn is related to the electron density of the sample. If X-rays are utilized, attenuation is preferably measured in two energy windows. Using the two different attenuation values found in the different windows, the attenuation due to Compton scattering can be found and related to the electron and/or mass density of the sample. In addition, attenuation due to photoelectric absorption may also be determined and related to the presence of one or more heavy elements in the oil (e.g., sulfur) and/or sanding.

19. 发明专利

GB2399167A Apparatus and methods for downhole determination of characteristics of formation fluids 未知
公开(公告)号：GB2399167A
公开(公告)日：2004-09-08
申请号：GB0411510
申请日：2002-12-05
申请人： SCHLUMBERGER HOLDINGS
发明人： CHEN FELIX , CORRIS GARY , MULLINS OLIVER , WU XU , FITZGERALD JOHN , GOODWIN ANTHONY R H
IPC分类号： E21B47/00 , E21B49/08 , G01N23/06 , G01N23/08 , G01N23/12 , G01N33/28 , G01V5/08 , G01V5/12
摘要： An oil sample is subjected to nuclear electromagnetic irradiation downhole, and the electron and/or mass density of the oil sample is determined by measuring the attenuation of the irradiation and relating the attenuation to the electron density. If the irradiation is high energy gamma ray irradiation, the attenuation is considered to be a function of Compton scattering only, which in turn is related to the electron density of the sample. If X-rays are utilized. attenuation is preferably measured in two energy windows. Using the two different attenuation values found in the different windows, the attenuation due to Compton scattering can he found and related to the electron and/or mass density of the sample. In addition, attenuation due to photoelectric absorption may also be determined and related to the presence of one or more heavy elements in the oil (e.g., sulfur) and/or sanding.

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