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1.发明授权Method and apparatus for focusing in resistivity measurement tools using independent electrical sources 有权用于使用独立电源聚焦在电阻率测量工具中的方法和装置公开(公告)号：US08390295B2
公开(公告)日：2013-03-05
申请号：US12171401
申请日：2008-07-11
申请人： Matthias Gorek , Martin Folberth , Christian Fulda
发明人： Matthias Gorek , Martin Folberth , Christian Fulda
IPC分类号： G01V3/00
CPC分类号： G01V3/20
摘要： A system for measuring a resistivity parameter of an earth formation includes: at least one measurement electrode electrically connected to a first electrical source; at least one guard electrode; a shielding electrode interposed between the at least one guard electrode and the at least one measurement electrode, the shielding electrode being electrically connected to a second electrical source independent from the first electrical source, and the guard electrode being electrically connected to a third electrical source independent of the first and second electrical sources; at least one return electrode; insulators positioned between (i) the measurement electrode and the shielding electrode, (ii) the shielding electrode and the guard electrode and (iii) the measurement electrode, the guard electrode and the return electrode; and a processor configured to adjust at least one of the first electrical source and the second electrical source to minimize a current flow through the shielding electrode.
摘要翻译： 用于测量地层电阻率参数的系统包括：电连接到第一电源的至少一个测量电极; 至少一个保护电极; 屏蔽电极，插在所述至少一个保护电极和所述至少一个测量电极之间，所述屏蔽电极电连接到独立于所述第一电源的第二电源，并且所述保护电极电连接到第三电源， 的第一和第二电源; 至少一个返回电极; 位于（i）测量电极和屏蔽电极之间的绝缘体，（ii）屏蔽电极和保护电极，以及（iii）测量电极，保护电极和返回电极; 以及处理器，其被配置为调节所述第一电源和所述第二电源中的至少一个，以最小化通过所述屏蔽电极的电流。
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2.发明申请公开(公告)号：US20100007349A1
公开(公告)日：2010-01-14
申请号：US12171401
申请日：2008-07-11
申请人： Matthias Gorek , Martin Folberth , Christian Fulda
发明人： Matthias Gorek , Martin Folberth , Christian Fulda
IPC分类号： G01V3/02
CPC分类号： G01V3/20
摘要： A system for measuring a resistivity parameter of an earth formation includes: at least one measurement electrode electrically connected to a first electrical source; at least one guard electrode; a shielding electrode interposed between the at least one guard electrode and the at least one measurement electrode, the shielding electrode being electrically connected to a second electrical source independent from the first electrical source, and the guard electrode being electrically connected to a third electrical source independent of the first and second electrical sources; at least one return electrode; insulators positioned between (i) the measurement electrode and the shielding electrode, (ii) the shielding electrode and the guard electrode and (iii) the measurement electrode, the guard electrode and the return electrode; and a processor configured to adjust at least one of the first electrical source and the second electrical source to minimize a current flow through the shielding electrode.
摘要翻译： 用于测量地层电阻率参数的系统包括：电连接到第一电源的至少一个测量电极; 至少一个保护电极; 所述屏蔽电极插在所述至少一个保护电极和所述至少一个测量电极之间，所述屏蔽电极电连接到独立于所述第一电源的第二电源，并且所述保护电极电连接到第三电源， 的第一和第二电源; 至少一个返回电极; 位于（i）测量电极和屏蔽电极之间的绝缘体，（ii）屏蔽电极和保护电极，以及（iii）测量电极，保护电极和返回电极; 以及处理器，其被配置为调节所述第一电源和所述第二电源中的至少一个，以最小化通过所述屏蔽电极的电流。
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3.发明授权Method and apparatus for improved current focusing in galvanic resistivity measurement tools for wireline and measurement-while-drilling applications 有权用于电缆电阻率测量工具的电流聚焦方法和装置，用于电缆和测量同时钻孔应用公开(公告)号：US07256582B2
公开(公告)日：2007-08-14
申请号：US11110620
申请日：2005-04-20
申请人： Matthias Gorek , Martin Folberth , Christian Fulda
发明人： Matthias Gorek , Martin Folberth , Christian Fulda
CPC分类号： G01V3/20
摘要： A galvanic resistivity tool with one or more measurement electrodes and guard electrodes, and one or more shielding electrodes. The potential difference between the measurement electrodes and the guard electrodes is controlled to minimize current flow between the measurement electrodes and the shielding electrodes. This provides improved focusing and avoids effects of contact impedance.
摘要翻译： 具有一个或多个测量电极和保护电极以及一个或多个屏蔽电极的电流电阻率工具。 控制测量电极和保护电极之间的电位差使得测量电极和屏蔽电极之间的电流最小化。 这提供了改进的聚焦并避免了接触阻抗的影响。
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4.发明申请Method and apparatus for improved current focusing in galvanic resistivity measurment tools for wireline and measurement-while-drilling applications 有权用于电缆电阻测量工具中改进电流聚焦的方法和装置，用于电缆和测量同时钻孔应用公开(公告)号：US20060238202A1
公开(公告)日：2006-10-26
申请号：US11110620
申请日：2005-04-20
申请人： Matthias Gorek , Martin Folberth , Christian Fulda
发明人： Matthias Gorek , Martin Folberth , Christian Fulda
CPC分类号： G01V3/20
摘要： A galvanic resistivity tool with one or more measurement electrodes and guard electrodes, and one or more shielding electrodes. The potential difference between the measurement electrodes and the guard electrodes is controlled to minimize current flow between the measurement electrodes and the shielding electrodes. This provides improved focusing and avoids effects of contact impedance.
摘要翻译： 具有一个或多个测量电极和保护电极以及一个或多个屏蔽电极的电流电阻率工具。 控制测量电极和保护电极之间的电位差使得测量电极和屏蔽电极之间的电流最小化。 这提供了改进的聚焦并避免了接触阻抗的影响。
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公开(公告)号：US20060214664A1
公开(公告)日：2006-09-28
申请号：US11088443
申请日：2005-03-24
申请人： Martin Folberth , Christian Fulda , Matthias Gorek
发明人： Martin Folberth , Christian Fulda , Matthias Gorek
IPC分类号： G01V3/08
CPC分类号： G01V3/30
摘要： A method and apparatus for downhole resistivity imaging uses an antenna coupled to a power source through a directional coupler. Measured reflectivity values are indicative of the antenna impedance and the formation resistivity, particularly if some compensation is made for the antenna inductance.
摘要翻译： 用于井下电阻率成像的方法和装置使用通过定向耦合器耦合到电源的天线。 测量的反射率值表示天线阻抗和地层电阻率，特别是如果对天线电感进行了一些补偿。
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6.发明申请Method and Apparatus for Determining Formation Resistivity Ahead of the Bit and Azimuthal at the Bit 有权用于确定位位置和方位角之前的形成电阻率的方法和装置公开(公告)号：US20070236222A1
公开(公告)日：2007-10-11
申请号：US11687470
申请日：2007-03-16
申请人： Matthias Gorek , Christian Fulda
发明人： Matthias Gorek , Christian Fulda
IPC分类号： G01V3/00
CPC分类号： G01V3/22 , E21B47/102
摘要： A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses the drillbit and the adjacent portion of the drill collar as a focusing electrode for focusing the measure current from a measure electrode on the face or side of the drillbit. This provides the ability to see ahead of and azimuthally around the drillbit.
摘要翻译： 用于获得MWD装置中钻孔周围的地层的电阻率测量的方法和装置使用钻头和钻铤的相邻部分作为聚焦电极，用于将来自测量电极的测量电流聚焦在测量电极的表面或侧面上 钻头。 这提供了在钻头周围的前方和方位角的能力。
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7.发明授权Method and apparatus for determining formation resistivity ahead of the bit and azimuthal at the bit 有权用于确定钻头位置和方位角之前的地层电阻率的方法和装置公开(公告)号：US07554329B2
公开(公告)日：2009-06-30
申请号：US11687470
申请日：2007-03-16
申请人： Matthias Gorek , Christian Fulda
发明人： Matthias Gorek , Christian Fulda
CPC分类号： G01V3/22 , E21B47/102
摘要： A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses the drillbit and the adjacent portion of the drill collar as a focusing electrode for focusing the measure current from a measure electrode on the face or side of the drillbit. This provides the ability to see ahead of and azimuthally around the drillbit.
摘要翻译： 用于获得MWD装置中钻孔周围的地层的电阻率测量的方法和装置使用钻头和钻铤的相邻部分作为聚焦电极，用于将来自测量电极的测量电流聚焦在测量电极的表面或侧面上 钻头。 这提供了在钻头周围的前方和方位角的能力。
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公开(公告)号：US10353101B2
公开(公告)日：2019-07-16
申请号：US15386418
申请日：2016-12-21
摘要： An apparatus for estimating a first property in a borehole penetrating the earth is described. The apparatus includes a carrier configured to be conveyed through the borehole. The apparatus also includes a first sensor disposed at the carrier and configured to perform a first measurement of the first property, the first sensor having a first direction of sensitivity; a second sensor disposed at the carrier and configured to perform a second measurement of a second property, the second sensor having a second direction of sensitivity; and a processor configured to receive the first and second measurements and to correct the first measurement using the second measurement in order to estimate the first property.
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公开(公告)号：US20180010450A1
公开(公告)日：2018-01-11
申请号：US15204089
申请日：2016-07-07
申请人： Ingo Forstner , Christian Fulda
发明人： Ingo Forstner , Christian Fulda
IPC分类号： E21B49/00
CPC分类号： E21B49/005 , E21B47/00 , G01V1/00 , G01V13/00 , G01V2200/14
摘要： An embodiment of a method of performing aspects of a downhole operation includes receiving a measurement value from a first sensor configured to measure a parameter related to the downhole operation, receiving measurement data from a different sensor, the measurement data related to the downhole operation, and performing, by a sensor evaluation module, an evaluation of the first sensor. The evaluation includes determining a condition of the first sensor based on the measurement data from the different sensor, selecting a rule that prescribes a set of one or more measurement values of the parameter that are plausible if the condition is met, and determining whether the measurement value from the first sensor is plausible based on comparing the measurement value to the prescribed set of one or more measurement values.
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公开(公告)号：US09618646B2
公开(公告)日：2017-04-11
申请号：US13401271
申请日：2012-02-21
申请人： Christian Fulda
发明人： Christian Fulda
IPC分类号： G01V3/30
CPC分类号： G01V3/30 , G01V2200/12
摘要： A system for synchronizing instruments in a drill pipe to detect formation characteristics comprises at least one first transmitter for transmitting a first signal, at least one first receiver for receiving a second signal having information based on the first signal, at least one acoustic transmitter for transmitting an acoustic signal, and at least one acoustic sensor electrically connected to one of the at least one first transmitter and the at least one first receiver, the at least one acoustic sensor for sensing the acoustic signal for synchronizing the at least one first transmitter and the at least one first receiver.
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