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11. 发明申请

WO2009117507A2 ELECTROMAGNETIC AND MAGNETOSTATIC SHIELD TO PERFORM MEASUREMENTS AHEAD OF THE DRILL BIT 审中-公开
标题翻译：电磁和静磁屏蔽以在钻头位置进行测量
公开(公告)号：WO2009117507A2
公开(公告)日：2009-09-24
申请号：PCT/US2009037549
申请日：2009-03-18
申请人： BAKER HUGHES INC , ITSKOVICH GREGORY B , CHEMALI ROLAND E , WANG TSILI
发明人： ITSKOVICH GREGORY B , CHEMALI ROLAND E , WANG TSILI
IPC分类号： G01V3/08 , G01V3/10 , G01V3/26 , G01V3/38
CPC分类号： G01V3/28
摘要： A transmitter on a bottomhole assembly (BHA) is used for generating a transient electromagnetic signal in an earth formation. A pair of receivers on the BHA receive signals that are indicative of formation resistivity and distances to bed boundaries. A time dependent calibration factor or a time-independent calibration factor may be used to combine the two received signals and estimate the distance to bed boundaries that are unaffected by the drill conductive body. Further improvement can be obtained by using copper shielding.
摘要翻译：底部钻具组合（BHA）上的发射器用于在地层中产生瞬态电磁信号。 BHA上的一对接收器接收指示地层电阻率和距地层边界距离的信号。可以使用时间相关的校准因子或时间独立的校准因子来组合两个接收到的信号并且估计不受钻头导电体影响的与地层边界的距离。通过使用铜屏蔽可以获得进一步的改进。

12. 发明申请

WO2010096802A3 METHOD FOR ACCENTUATING SIGNAL FROM AHEAD OF THE BIT 审中-公开
标题翻译：从位的前端识别信号的方法
公开(公告)号：WO2010096802A3
公开(公告)日：2011-01-27
申请号：PCT/US2010025033
申请日：2010-02-23
申请人： BAKER HUGHES INC , GEORGI DANIEL T , ITSKOVICH GREGORY B , RABINOVICH MICHAEL B , TABAROVSKY LEONTY A
发明人： GEORGI DANIEL T , ITSKOVICH GREGORY B , RABINOVICH MICHAEL B , TABAROVSKY LEONTY A
IPC分类号： G01V11/00 , E21B47/00 , G01V1/40 , G01V3/18 , G01V5/04
CPC分类号： G01V3/28 , G01V11/00 , G01V2210/6163 , G01V2210/6167
摘要： A method for estimating a property of a portion of an earth formation ahead of a borehole penetrating the formation, the method includes: conveying a logging tool through the borehole; receiving one or more first signals from a previous depth of the logging tool; constructing a model of the earth formation using the one or more first signals; predicting one or more second signals from the portion of the earth formation ahead of the borehole using the model; receiving one or more third signals from the portion of the earth formation ahead of the borehole; calculating a difference between the one or more third signals and the one or more second signals; and estimating the property from the difference.
摘要翻译：一种用于估计穿过地层的井眼之前的地层的一部分的性质的方法，所述方法包括：将测井工具传送通过所述钻孔; 从测井工具的先前深度接收一个或多个第一信号; 使用所述一个或多个第一信号构造地层的模型; 使用该模型预测来自钻孔前方的地层部分的一个或多个第二信号; 从钻孔前面的地层部分接收一个或多个第三信号; 计算所述一个或多个第三信号与所述一个或多个第二信号之间的差; 并从差异估算属性。

13. 发明申请

WO2010045642A2 METHOD AND APPARATUS FOR WHILE-DRILLING TRANSIENT RESISTIVITY MEASUREMENTS 审中-公开
标题翻译：用于瞬时电阻测量的方法和装置
公开(公告)号：WO2010045642A2
公开(公告)日：2010-04-22
申请号：PCT/US2009061178
申请日：2009-10-19
申请人： BAKER HUGHES INC , ITSKOVICH GREGORY B
发明人： ITSKOVICH GREGORY B
IPC分类号： E21B49/00 , E21B43/00 , G01V3/26 , G01V3/28
CPC分类号： G01V3/28
摘要： Structure for deep MWD resistivity measurements suitable for both geo-steering and measurements ahead of the drill bit is disclosed. The structure is capable of extracting information about resistivity of formation in the presence of conductive drill. In one embodiment, ahead-of-bit sensing is achieved via transient electromagnetic measurements when current is switched off in the transmitter loop and the transient signal is measured in the receiver loops placed at some distances from the receiver. To reduce a parasitic effect of the currents in the drill three-coil bucking system with magnetic nonconductive shield in combination with a highly conductive copper shield are applied. Specifically, a short (less than Im) copper cover and short (less than 0.2 m) ferrite cover are placed in the vicinity of transmitting and receiving coils. A bucking operation followed by an inversion is performed on received signals to obtain data reflecting parameters of the surrounding subsurface formations.
摘要翻译：公开了适用于钻头之前的地理转向和测量的深MWD电阻率测量结构。该结构能够在导电钻的存在下提取关于形成电阻率的信息。在一个实施例中，当在发射机环路中关断电流时，通过瞬态电磁测量来实现比特前感测，并且在放置在离接收机一些距离处的接收器环路中测量瞬态信号。应用与磁性非导电屏蔽结合高导电铜屏蔽的钻三线圈降压系统中的电流的寄生效应。具体来说，在发射和接收线圈附近放置一个短（小于Im）的铜盖和短（小于0.2米）的铁氧体盖。对接收到的信号执行反转操作，以获得反映周围地下地层参数的数据。

14. 发明申请

WO2007116317A2 ELECTROMAGNETIC AND MAGNETOSTATIC SHIELD TO PERFORM MEASUREMENTS AHEAD OF THE DRILL BIT 审中-公开
标题翻译：电磁和磁铁屏蔽以实现钻头前的测量
公开(公告)号：WO2007116317A2
公开(公告)日：2007-10-18
申请号：PCT/IB2007001241
申请日：2007-05-14
申请人： BAKER HUGHES INC , ITSKOVICH GREGORY B
发明人： ITSKOVICH GREGORY B
CPC分类号： G01V3/28
摘要： A transmitter on a bottomhole assembly (BHA) is used for generating a transient electromagnetic signal in an earth formation. A receiver on the BHA receives signals that are indicative of formation resistivity and distances to bed boundaries. A combination of electromagnetic shielding and magnetostatic shielding enables determination of distance to an interface ahead of the drillbit.
摘要翻译：井底组件（BHA）上的发射器用于在地层中产生瞬态电磁信号。 BHA上的接收器接收指示地层电阻率和距离到床边界的信号。电磁屏蔽和静磁屏蔽的组合使得能够确定到钻头前方的界面的距离。

15. 发明申请

WO2010057070A2 METHOD OF DEEP RESISTIVITY TRANSIENT MEASURMENT WHILE DRILLING 审中-公开
标题翻译：钻井过程中深部电阻率瞬变测量方法
公开(公告)号：WO2010057070A2
公开(公告)日：2010-05-20
申请号：PCT/US2009064524
申请日：2009-11-16
申请人： BAKER HUGHES INC , REIDERMAN ARCADY , ITSKOVICH GREGORY B
发明人： REIDERMAN ARCADY , ITSKOVICH GREGORY B
IPC分类号： E21B47/022 , G01V3/08 , G01V3/26
CPC分类号： G01V3/28
摘要： A transient electromagnetic signal is recorded in an earth formation in the presence of a pipe having a finite conductivity. A portion of the signal dominated by the pipe signal is analyzed to determine a functional representation, extrapolated back to a time interval where the formation signal is present and subtracted from the recorded signal to provide a corrected signal.
摘要翻译：在存在具有有限导电率的管道的情况下，瞬态电磁信号被记录在地层中。分析由管道信号支配的信号的一部分以确定功能表示，外推回到存在形成信号的时间间隔，并从记录的信号中减去以提供校正的信号。

16. 发明申请

WO2011035131A3 TDEM FORWARD FOCUSING SYSTEM FOR DOWNHOLE USE 审中-公开
标题翻译： TDEM正向聚焦系统井下使用
公开(公告)号：WO2011035131A3
公开(公告)日：2011-07-14
申请号：PCT/US2010049294
申请日：2010-09-17
申请人： BAKER HUGHES INC , ITSKOVICH GREGORY B
发明人： ITSKOVICH GREGORY B
IPC分类号： E21B49/00 , E21B47/00 , E21B49/08
CPC分类号： G01V1/42
摘要： A method and apparatus for estimating a parameter of interest of an earth formation ahead of a carrier within borehole. The method including estimating one or more functions based on received signals that may reduce the sum of the signals received by a first receiver, and estimating the parameter of interest based on signals received by one or more additional receivers by applying the one or more functions and, if necessary, a defocusing factor, such that reception of information from downhole of a selected downhole location is enhanced relative to reception of information uphole from the selected location. The apparatus including two or more transmitters, two or more receivers, and a processor to estimate one or more functions, and, based on these functions, the parameter of interest.
摘要翻译：一种用于估计钻孔内载体前面的地层的感兴趣参数的方法和装置。该方法包括：基于可以减少由第一接收机接收的信号的总和的接收信号来估计一个或多个功能;以及基于由一个或多个附加接收机通过应用一个或多个功能接收的信号来估计感兴趣的参数;以及，如果需要的话，还包括散焦因子，使得相对于从所选位置向井上信息的接收，选择的井下位置的井下信息的接收得到增强。该装置包括两个或更多个发射器，两个或更多个接收器以及估计一个或更多个功能的处理器，并且基于这些功能来确定感兴趣的参数。

17. 发明申请

WO2012109433A2 INVERSION-BASED METHOD TO CORRECT FOR THE PIPE RESIDUAL SIGNAL IN TRANSIENT MWD MEASUREMENTS 审中-公开
标题翻译：用于纠正瞬态MWD测量中管道残留信号的基于反演的方法
公开(公告)号：WO2012109433A2
公开(公告)日：2012-08-16
申请号：PCT/US2012024463
申请日：2012-02-09
申请人： BAKER HUGHES INC , ITSKOVICH GREGORY B
发明人： ITSKOVICH GREGORY B
IPC分类号： G01V3/26 , G01V3/38
CPC分类号： G01V3/28
摘要： An apparatus and method for reducing a pipe residual signal from transient signals in an induction tool having a metallic pipe with finite, non-zero conductivity in a borehole penetrating an earth formation. The apparatus may include a transient electromagnetic (TEM) signal transmitter, at least one receiver configured to generate an output signal in response to the TEM signal, and at least one processor for estimating an updated model with an improved estimate of the resistivity property. The updated model may be estimated based on a difference between a simulated signal from an initial model and the output signal. The difference may be represented by a set of basis functions. The method includes using the apparatus.
摘要翻译：一种用于在具有穿透地层的钻孔中具有有限非零导电性的金属管的感应工具中从瞬态信号中减少管道残留信号的装置和方法。该装置可以包括瞬态电磁（TEM）信号发射器，至少一个被配置为响应于TEM信号产生输出信号的接收器，以及至少一个处理器，用于利用改进的电阻率特性估计来估计更新的模型。可以基于来自初始模型的模拟信号与输出信号之间的差异来估计更新的模型。差异可以由一组基函数表示。该方法包括使用该装置。

18. 发明申请

WO2011129990A3 THREE-COIL SYSTEM WITH SHORT NONCONDUCTIVE INSERTS FOR TRANSIENT MWD RESISTIVITY MEASUREMENTS 审中-公开
标题翻译：具有瞬态MWD电阻测量的短路非线性插件的三线圈系统
公开(公告)号：WO2011129990A3
公开(公告)日：2012-04-05
申请号：PCT/US2011030163
申请日：2011-03-28
申请人： BAKER HUGHES INC , ITSKOVICH GREGORY B , REIDERMAN ARCADY
发明人： ITSKOVICH GREGORY B , REIDERMAN ARCADY
IPC分类号： G01V3/20 , E21B47/00 , G01V3/34
CPC分类号： G01V3/28 , E21B47/00 , G01V3/30 , G01V11/002
摘要： A three-coil bucking system is used for determination of a formation resistivity property ahead of the drill bit. The conductive drill pipe is provided with non- conductive inserts in the proximity of at least one transmitter and at least two receivers. Transient electromagnetic signals are processed to give the estimate of the resistivity property and for geosteering.
摘要翻译：三线圈抗弯系统用于确定钻头前的地层电阻率特性。导电钻管在至少一个发射器和至少两个接收器附近设置有非导电插入件。处理瞬态电磁信号以给出电阻率性质和地质导向的估计。

19. 发明申请

WO2012030768A2 DTEM WITH SHORT SPACING FOR DEEP, AHEAD OF THE DRILL BIT MEASUREMENTS 审中-公开
标题翻译：具有短距离的DTEM，钻头钻头测量前的项目
公开(公告)号：WO2012030768A2
公开(公告)日：2012-03-08
申请号：PCT/US2011049650
申请日：2011-08-30
申请人： BAKER HUGHES INC , ITSKOVICH GREGORY B , REIDERMAN ARCADY , RABINOVICH MICHAEL B , MARTAKOV SERGEY , IOMDINA EMMA
发明人： ITSKOVICH GREGORY B , REIDERMAN ARCADY , RABINOVICH MICHAEL B , MARTAKOV SERGEY , IOMDINA EMMA
IPC分类号： G01V3/26 , E21B47/00 , G06F19/00
CPC分类号： G01V3/28 , E21B41/0092 , E21B47/00 , E21B47/10
摘要： A transmitter on a bottomhole assembly (BHA) is used for generating a transient electromagnetic signal in an earth formation. A processor estimates the distance to a resistivity interface using a signal produced by a receiver on the BHA. The transmitter-receiver distance may be less than 1m. The estimation of the distance is done in real time using a thin conductive sheet approximation.
摘要翻译：井底组件（BHA）上的发射器用于在地层中产生瞬态电磁信号。处理器使用由BHA上的接收器产生的信号估计到电阻率界面的距离。发射机 - 接收机距离可能小于1米。距离的估计是使用薄导电片近似来实时实现的。

20. 发明申请

WO2009117591A3 METHOD AND APPARATUS FOR ELIMINATING DRILL EFFECT IN PULSE INDUCTION MEASUREMENTS 审中-公开
标题翻译：消除脉冲感应测量中钻孔效应的方法和装置
公开(公告)号：WO2009117591A3
公开(公告)日：2009-12-23
申请号：PCT/US2009037688
申请日：2009-03-19
申请人： BAKER HUGHES INC , ITSKOVICH GREGORY B , CHEMALI ROLAND E
发明人： ITSKOVICH GREGORY B , CHEMALI ROLAND E
IPC分类号： G01V3/08 , E21B47/02 , G01V3/10 , G01V3/28
CPC分类号： G01V3/28
摘要： A method and apparatus provide a time-dependent calibration to essentially eliminate pipe effect in pulse-induction logging while drilling. Use of two receivers to provide calibration and measurement information allows determination of formation properties in a downhole environment while eliminating the effect of tool effects.
摘要翻译：一种方法和装置提供时间依赖性校准，以在钻孔时基本上消除脉冲诱导测井中的管道效应。使用两个接收器提供校准和测量信息可以在井下环境中确定地层特性，同时消除工具效应的影响。

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