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    Measurement-while-drilling assembly using gyroscopic devices and methods of bias removal
    1.
    发明授权
    Measurement-while-drilling assembly using gyroscopic devices and methods of bias removal 失效
    使用陀螺仪测量同步钻孔组件和偏移去除方法

    公开(公告)号：US6347282B2

    公开(公告)日：2002-02-12

    申请号：US20490898

    申请日：1998-12-03

    Applicant: BAKER HUGHES INC

    Inventor： ESTES ROBERT A ,  NOY KOEN ANTONIE ,  KAHN JON B

    IPC: E21B47/022 ,  G01C19/38 ,  G01V1/48 ,  G01V3/18

    CPC classification number: G01C19/38 ,  E21B47/022

    Abstract: This invention provides a measurement-while-drilling (MWD) downhole assembly for use in drilling boreholes which utilizes gyroscopes, magnetometers and accelerometers for determining the borehole inclination and azimuth during the drilling of the borehole. The downhole assembly includes at least one gyroscope that is rotatably mounted in a tool housing to provide signals relating to the earth's rotation. A device in the tool can rotate the gyroscope and other sensors on the tool at any desired degree. A processor in the tool combines measurements from the sensors taken at a plurality of positions at the same depth to determine the systematic bias in the sensors before further processing. Accelerometers in the MWD tool provide gravity measurements from which the toolface and inclination are determined. The unbiased gyroscopic measurements are used in conjunction with the tool face and inclination measurements to determine the azimuth and tool face with respect to true north. Three axially spaced apart magnetometers may be used to correct for local magnetic disturbances. Additionally, when measurements are made with magnetic, accelerometer and gyroscopic measurements along three different axes, the unbiased measurements may be combined to provide an improved determination of the tool orientation.

    Abstract translation: 本发明提供了一种用于钻孔的钻井测量钻井（MWD）井下组件，其利用陀螺仪，磁力计和加速度计来确定钻孔期间的井眼倾角和方位角。 井下组件包括至少一个可旋转地安装在工具壳体中以提供与地球旋转​​相关的信号的陀螺仪。 工具中的设备可以以任何所需的程度旋转陀螺仪和工具上的其他传感器。 该工具中的处理器将来自在相同深度的多个位置处获取的传感器的测量结合在一起，以在进一步处理之前确定传感器中的系统偏差。 MWD工具中的加速度计提供了测量工具面和倾斜度的重力测量。 无偏差的陀螺仪测量与工具面和倾斜度测量结合使用，以确定相对于真北的方位角和工具面。 可以使用三个轴向间隔开的磁力计来校正局部磁扰动。 另外，当通过磁性，加速度计和沿着三个不同轴的陀螺测量进行测量时，可以组合无偏差的测量值以提供对刀具取向的改进的确定。

    REAL-TIME, LIMITED ORIENTATION SENSOR AUTO-CALIBRATION
    2.
    发明公开
    REAL-TIME, LIMITED ORIENTATION SENSOR AUTO-CALIBRATION 审中-公开

    公开(公告)号：EP3143246A4

    公开(公告)日：2018-02-28

    申请号：EP15792309

    申请日：2015-05-15

    Applicant: BAKER HUGHES INC

    Inventor： ESTES ROBERT A ,  RIGGS RANDY R ,  HANAK FRANCIS CHAD ,  PRIEST JOHN F

    IPC: E21B47/00 ,  E21B47/09 ,  G01V3/18 ,  G01V3/26 ,  G01V3/40 ,  G01V7/00 ,  G01V7/04 ,  G01V11/00 ,  G01V13/00

    CPC classification number: G01V3/26 ,  E21B47/0905 ,  G01V3/40 ,  G01V7/00 ,  G01V7/005 ,  G01V7/04 ,  G01V11/00 ,  G01V13/00

    Abstract: A system method and computer-readable medium for correcting measurements obtained by a down hole tool for residual measurement errors is disclosed. A down hole tool having at least two directional field sensors is disposed in a borehole. The at least two directional sensors are substantially orthogonal to each other and to a longitudinal axis of the down hole tool. Measurements are obtained from the at least two directional sensors during rotation of the tool by at least 360 degrees around the longitudinal axis of the tool. Residual measurement errors are determined for the obtained measurements, and a quality level of the determined residual measurement errors selected. The determined residual measurement errors are applied to the obtained measurements when the determined residual measurement errors are consistent with the selected quality level. In various embodiments, the residual measurement errors are reduced from a first value that does not match the selected quality level to a second value that are consistent with the selected quality level.

    MEASUREMENT- WHILE-DRILLING ASSEMBLY USING REAL-TIME TOOLFACE ORIENTED MEASUREMENTS
    4.
    发明申请
    MEASUREMENT- WHILE-DRILLING ASSEMBLY USING REAL-TIME TOOLFACE ORIENTED MEASUREMENTS 审中-公开
    使用实时面向工具测量的测量 - 钻井组装

    公开(公告)号：WO2004011775A3

    公开(公告)日：2004-04-29

    申请号：PCT/US0323707

    申请日：2003-07-30

    Applicant: BAKER HUGHES INC

    Inventor： CAIRNS PAUL GERARD ,  EFREMOV SERGEY V ,  SCHNEIDER DAVID M ,  DEHLAVI SASSAN ,  ESTES ROBERT A ,  BELL SAMUEL R

    IPC: E21B44/00 ,  E21B47/00 ,  E21B47/024 ,  E21B47/026 ,  G01V5/04 ,  G01V1/48

    CPC classification number: E21B44/00 ,  E21B47/0002 ,  E21B47/024 ,  E21B47/026 ,  G01V5/04

    Abstract: This invention provides a measurement-while-drilling (MWD) downhole assembly for use in drilling boreholes which utilizes directional formation evaluation devices on a rotating assembly in conjunction with toolface orientation sensors. The data from the toolface orientation sensors are analyzed by a processor and toolface angle measurements are determined at defined intervals. Formation evaluation sensors operate substantially independently of the toolface orientation sensors and measurements of the formation evaluation sensors are analyzed in combination with the determined toolface angle to obtain formation parameters.

    Abstract translation: 本发明提供了一种随钻测量（MWD）井下组件，其用于钻孔，其利用旋转组件上的定向地层评估装置以及工具面取向传感器。 来自工具面取向传感器的数据由处理器进行分析，并且以定义的间隔确定工具面角度测量。 地层评估传感器基本上独立于工具面取向传感器而操作，并且与地层评估传感器的测量结合所确定的工具面角度进行分析以获得地层参数。

    DOWNHOLE CLOSED LOOP DRILLING SYSTEM WITH DEPTH MEASUREMENT
    7.
    发明公开
    DOWNHOLE CLOSED LOOP DRILLING SYSTEM WITH DEPTH MEASUREMENT 审中-公开
    博士研究生学位课程

    公开(公告)号：EP3055502A4

    公开(公告)日：2017-06-28

    申请号：EP14852473

    申请日：2014-10-06

    Applicant: BAKER HUGHES INC

    Inventor： KRUSPE THOMAS ,  ESTES ROBERT A ,  DIFOGGIO ROCCO ,  HANAK FRANCIS CHAD

    IPC: E21B47/04 ,  E21B7/04 ,  E21B44/00 ,  E21B47/09

    CPC classification number: E21B7/04 ,  E21B44/005 ,  E21B47/091

    Abstract: A method, system and drilling apparatus for directional drilling are disclosed. A drill bit is located at a downhole end of a drill string in a borehole. A length of the borehole between a surface location and the drill bit at the downhole end of a drill string is determined and an azimuth angle and inclination of the drill bit is obtained. The length of the borehole may be determined by recording an arrival time at a downhole location of an acoustic pulse travelling from a surface location to the downhole location and determines the travel time and borehole length therefrom. A downhole processor determines a position and orientation of the drill bit from the determined length, azimuth angle and inclination and alters a steering parameter of the drill bit using the determined position and orientation of the drill bit to obtain a selected trajectory for drilling the borehole.

    Abstract translation: 公开了一种定向钻井的方法，系统和钻井设备。 钻头位于钻孔中钻柱的井下端。 确定钻柱的井下端处的表面位置与钻头之间的钻孔的长度，并获得钻头的方位角和倾角。 钻孔的长度可以通过记录从表面位置行进到井下位置的声脉冲的井下位置处的到达时间并由此确定行进时间和钻孔长度来确定。 井下处理器根据所确定的长度，方位角和倾角来确定钻头的位置和取向，并且使用所确定的钻头的位置和取向来改变钻头的转向参数，以获得用于钻孔的选择的轨迹。

    METHOD OF COMPENSATING MEASUREMENTS MADE BY A DOWNHOLE SURVEY INSTRUMENT
    9.
    发明专利
    METHOD OF COMPENSATING MEASUREMENTS MADE BY A DOWNHOLE SURVEY INSTRUMENT 未知

    公开(公告)号：CA2615392C

    公开(公告)日：2011-06-21

    申请号：CA2615392

    申请日：2004-08-06

    Applicant: BAKER HUGHES INC

    Inventor： ESTES ROBERT A ,  BYNUM R JOHNATHAN ,  RIGGS RANDELL ,  EPPLIN M DAVID

    IPC: E21B47/022 ,  E21B47/09 ,  G01C19/04

    Abstract: A method of compensating measurements made by a downhole survey instrument comprises making measurements with the downhole survey instrument at a plurality of rotational positions; applying a first correction to the measurements using a thermal model to give a first set of corrected measurements; fitting a sinusoidal function of angular position to the first set of corrected measurements; fitting a polynomial function of temperature to a residual remaining after the sinusoidal fitting; and determining a corrected bias for the measurements made by the downhole gyroscope using results of the polynomial fitting.

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