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公开(公告)号：EP2718749A1
公开(公告)日：2014-04-16
申请号：EP11870725.6
申请日：2011-08-10
IPC分类号： G01V3/10
摘要： A logging tool and method for winding a multi-component induction (MCI) antenna is presented. The method eliminates unwanted dipole signals that are created by the voltage drop that takes place in the transmitter. The antenna is made of at least two parts physically separated, one on each side of the mandrel. The winding method is performed in a way that creates at least four windings arranged to eliminate dipole signals attributable to an asymmetric voltage distribution. The midpoint of the conductive wire that forms the antenna windings may be electrically attached to the tool body. This method is suitable for the winding of the cross-components X and Y of the MCI coil arrays.
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公开(公告)号：EP2167994A1
公开(公告)日：2010-03-31
申请号：EP07795118.4
申请日：2007-05-21
CPC分类号： G01V3/24
摘要： An apparatus and method for performing high transverse resolution voltage measurements in downhole logging tools utilized to determine the resistivity of an adjacent portion of a borehole wall Two current electrodes 508 and 509 are energized by an excitation source to create an oscillatory electric field in a borehole wall The voltage drop from each voltage electrode in a row of laterally spaced voltage electrodes 604 is measured relative to a shared voltage electrode 606 longitudinally spaced from the row of electrodes The differential voltage is used in combination with a measured current flow to determine a resistivity value for the borehole A second row of laterally spaced voltage electrodes 608 having electrodes laterally offset from the electrodes of the first row is included to provide high transverse resolution A common mode voltage at the shared voltage electrodes is measured and utilized to minimize the resistivity measurement error
摘要翻译： 用于在井下测井工具中执行高横向分辨率电压测量的装置和方法，用于确定钻孔壁的相邻部分的电阻率两个电流电极508和509由激发源激励以在钻孔壁中产生振荡电场 来自横向间隔开的电压电极604的行中的每个电压电极的电压降相对于与电极行纵向间隔开的共享电压电极606测量。差分电压与测量的电流组合使用以确定电阻率值 钻孔第二行横向间隔开的电压电极608具有与第一行的电极横向偏移的电极，以提供高横向分辨率。测量共享电压电极处的共模电压并利用该电压来最小化电阻率测量误差
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3.发明公开
公开(公告)号：EP1917499A1
公开(公告)日：2008-05-07
申请号：EP05772112.8
申请日：2005-08-03
发明人： DAVIES, Evan, L. , DONISON, Gary, L. , WIECEK, Boguslaw , SAND, Byron, J. , LOZINSKY, Clint, P. , WONG, David, Yan Lap
IPC分类号： G01C15/00 , G01C25/00 , E21B47/022
CPC分类号： E21B47/022 , E21B47/024 , G01C21/16
摘要： An orientation sensing apparatus includes a rotatable first member, an orientation sensor device fixed with the first member for generating orientation data relating to an orientation sensor device orientation, and a rotation sensor device for generating rotation data relating to rotation of the first member. A method for determining an orientation includes assembling a set of sensor data including the orientation data and rotation data and processing the set of sensor data to generate a set of corrected orientation data. The set of corrected orientation data includes the orientation data which has been corrected using the rotation data to reduce the effects of rotation of the first member and misalignment of the gravity sensor device. One or more sets of corrected orientation data may be processed to determine an inclination orientation of the first member or a toolface orientation of a second member which is connected with the first member.
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公开(公告)号：EP3185047A2
公开(公告)日：2017-06-28
申请号：EP17156596.3
申请日：2007-05-21
IPC分类号： G01V3/24
CPC分类号： G01V3/24
摘要： An apparatus and method for performing high transverse resolution voltage measurements in downhole logging tools utilized to determine the resistivity of an adjacent portion of a borehole wall. Two current electrodes 508 and 509 are energized by an excitation source to create an oscillatory electric field in a borehole wall The voltage drop from each voltage electrode in a row of laterally spaced voltage electrodes 604 is measured relative to a shared voltage electrode 606 longitudinally spaced from the row of electrodes The differential voltage is used in combination with a measured current flow to determine a resistivity value for the borehole. A second row of laterally spaced voltage electrodes 608 having electrodes laterally offset from the electrodes of the first row is included to provide high transverse resolution. A common mode voltage at the shared voltage electrodes is measured and utilized to minimize the resistivity measurement error.
摘要翻译： 一种用于在井下测井工具中执行高横向分辨率电压测量的装置和方法，所述井下测井工具用于确定钻孔壁的相邻部分的电阻率。 两个电流电极508和509由激励源激励以在钻孔壁中产生振荡电场。一排横向间隔的电压电极604中的每个电压电极的电压降相对于与纵向隔开的共享电压电极606测量 电极行该差分电压与测量的电流组合使用以确定钻孔的电阻率值。 包括具有横向偏离第一行的电极的电极的第二行横向间隔电压电极608以提供高横向分辨率。 测量共享电压电极处的共模电压并将其用于使电阻率测量误差最小化。
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5.发明公开
公开(公告)号：EP2946235A1
公开(公告)日：2015-11-25
申请号：EP13880573.4
申请日：2013-03-28
IPC分类号： G01V3/28
CPC分类号： G01V11/007 , E21B47/0905 , E21B47/101 , E21B49/00 , E21B49/08 , G01V1/40 , G01V1/44 , G01V1/52 , G01V3/28 , G01V11/00 , G01V2200/16
摘要： An integrated acoustic and induction logging tool enables efficient logging operations and reduces logging string length. In some of the disclosed embodiments, an integrated acoustic and induction logging tool includes a mandrel compatible with acoustic logging operations and induction logging operations. The integrated acoustic and induction logging tool also includes an acoustic logging transducer set and an induction logging coil set, where a plurality of transducers of the acoustic logging transducer set are interspersed among a plurality of coils of the induction logging coil set along the mandrel. A related assembly method includes obtaining a mandrel compatible with acoustic logging and induction logging. The method also includes assembling an acoustic logging transducer set and an induction logging coil set along the mandrel, where a plurality of transducers of the acoustic logging transducer set are interspersed among a plurality of coils of the induction logging coil set along the mandrel.
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公开(公告)号：EP2867707A1
公开(公告)日：2015-05-06
申请号：EP12740762.5
申请日：2012-06-27
IPC分类号： G01V3/28
CPC分类号： E21B49/005 , E21B47/01 , E21B49/087 , G01V3/26 , G01V3/28 , Y02A90/342
摘要： A system and method for reducing borehole effects in a borehole within a subterranean formation is disclosed. The apparatus includes a fluid excluder, which includes a sleeve body and a sleeve opening defined by the sleeve body. The sleeve may be sized to fit around an induction tool. The sleeve body may include a fluid passageway therethrough, which may divert drilling fluids when the apparatus is deployed downhole. The apparatus may further include an electrode disposed within the fluid passageway for reducing the electrical current in the drilling fluid and thereby improve the readings obtained by logging devices.
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公开(公告)号：EP1917499B1
公开(公告)日：2019-08-14
申请号：EP05772112.8
申请日：2005-08-03
发明人： DAVIES, Evan, L. , DONISON, Gary, L. , WIECEK, Boguslaw , SAND, Byron, J. , LOZINSKY, Clint, P. , WONG, David, Yan Lap
IPC分类号： G01C15/00 , G01C25/00 , E21B47/022
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公开(公告)号：EP3185047A3
公开(公告)日：2017-08-09
申请号：EP17156596.3
申请日：2007-05-21
IPC分类号： G01V3/24
CPC分类号： G01V3/24
摘要： An apparatus and method for performing high transverse resolution voltage measurements in downhole logging tools utilized to determine the resistivity of an adjacent portion of a borehole wall. Two current electrodes 508 and 509 are energized by an excitation source to create an oscillatory electric field in a borehole wall The voltage drop from each voltage electrode in a row of laterally spaced voltage electrodes 604 is measured relative to a shared voltage electrode 606 longitudinally spaced from the row of electrodes The differential voltage is used in combination with a measured current flow to determine a resistivity value for the borehole. A second row of laterally spaced voltage electrodes 608 having electrodes laterally offset from the electrodes of the first row is included to provide high transverse resolution. A common mode voltage at the shared voltage electrodes is measured and utilized to minimize the resistivity measurement error.
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