公开(公告)号：US10436587B2

公开(公告)日：2019-10-08

申请号：US16004310

申请日：2018-06-08

Applicant: HRL Laboratories, LLC

Inventor： Logan D. Sorenson ,  Hung Nguyen ,  Raviv Perahia ,  Lian X. Huang ,  David T. Chang

IPC: G01C19/5684 ,  G01C19/02 ,  G01C19/5712

Abstract: An angular sensor, comprising a Coriolis vibratory gyroscope (CVG) resonator, capable of oscillating along a first pair of normal n=1 modes comprising a first normal mode and a second normal mode; and a second pair of normal n=2 modes comprising a third normal mode and a fourth normal mode; the sensor further comprising one drive electrode and one sense electrode aligned along an anti-nodal axis of each mode; and a pair of bias tune electrodes aligned with an anti-nodal axis of each mode if no drive and sense electrode pair is aligned with said anti-nodal axis.

公开(公告)号：US10422641B1

公开(公告)日：2019-09-24

申请号：US15063201

申请日：2016-03-07

Applicant: HRL Laboratories, LLC

Inventor： Raviv Perahia ,  Deborah J. Kirby ,  Logan D. Sorenson ,  Richard J. Joyce

IPC: G01C19/56

Abstract: A gyroscope includes a cylindrical shell having a first end and a second end, a pedestal, a plurality of spokes coupled from the pedestal to the second end of the cylindrical shell, and a plurality of tuning tabs extending from one or more of the plurality of spokes.

公开(公告)号：US10329897B2

公开(公告)日：2019-06-25

申请号：US15881700

申请日：2018-01-26

Applicant: HRL Laboratories, LLC

Inventor： Keerti S. Kona ,  Logan D. Sorenson ,  Raviv Perahia ,  Hung Nguyen ,  David Chang

IPC: E21B47/04 ,  E21B47/06 ,  E21B47/18 ,  E21B47/022

Abstract: Described is a system for estimating measured depth of a borehole. The system comprises a drilling fluid pulse telemetry system positioned in a borehole and processors connected with the drilling fluid pulse telemetry system. Time series measures are obtained from an environmental sensor package. Initial estimates of a time delay and path attenuation amplitude are determined. An error for the initial estimates is determined, and iterative minimization of the error is performed until source signal parameters converge, resulting in a least squares estimate of the source signal and the reflected signals. The least squares estimate is used to obtain time delay values, which are then used to continuously generate an estimate of a measured depth of the borehole.

公开(公告)号：US20190049247A1

公开(公告)日：2019-02-14

申请号：US16003010

申请日：2018-06-07

Applicant: HRL Laboratories, LLC

Inventor： Lian X HUANG ,  Logan D. Sorenson ,  Raviv Perahia ,  Hung Nguyen ,  Hung Nguyen ,  David T. Chang

IPC: G01C19/5712

Abstract: A resonator includes an anchor, an outer stiffener ring on an outer perimeter of the resonator, and a plurality of curved springs between the anchor and the outer stiffener ring.

公开(公告)号：US20180371894A1

公开(公告)日：2018-12-27

申请号：US16018695

申请日：2018-06-26

Applicant: HRL LABORATORIES, LLC

Inventor： Shuoqin Wang ,  Logan D. Sorenson ,  David L. Walter ,  Adour V. Kabakian ,  Hung Nguyen ,  Raviv Perahia ,  David T. Chang

IPC: E21B47/022 ,  E21B47/06 ,  E21B7/04 ,  E21B47/024

Abstract: A method for generating an output of a downhole inertial measurement unit (IMU) includes: generating a trajectory between a plurality of survey points of a planned well data as a function of time, wherein the planned well data includes a plurality of three-dimensional coordinates corresponding to the survey points of an underground planned well are used to generate a trajectory comprising a plurality of trajectory coordinates between the consecutive ones of the survey points; generating sensor data for each of the trajectory coordinates as a function of time based on the geodetic reference parameters, the generated sensor data comprising: generated accelerometer output; generated gyroscopic output; and generated magnetometer output; and outputting the generated accelerometer output; the generated gyroscopic output; and the generated magnetometer output as a function of time as a generated output of the downhole IMU.

公开(公告)号：US11493534B1

公开(公告)日：2022-11-08

申请号：US16673878

申请日：2019-11-04

Applicant: HRL Laboratories, LLC

Inventor： Logan D. Sorenson ,  Lian X. Huang ,  Matthew J. Pelliccione ,  Raviv Perahia ,  Hung Nguyen ,  David T. Chang

IPC: G01P21/00 ,  B81B3/00 ,  G01P15/08

Abstract: A self-calibration method for an accelerometer having a proof mass separated by a gap from a drive electrode and a sense electrode includes initializing the accelerometer to resonate, applying a first bias voltage to the sense electrode and a second bias voltage to the drive electrode to obtain a first scale factor, measuring a first acceleration over a first time interval, swapping the first bias voltage on the sense electrode with the second bias voltage previously on the drive electrode and the second bias voltage on the drive electrode with the first bias voltage previously on the sense electrode so that a bias voltage on the sense electrode is set to the second bias voltage and a bias voltage on the drive electrode is set to the second bias voltage to obtain a second scale factor, measuring a second acceleration over a second time interval, and calculating a true acceleration.

公开(公告)号：US11299981B2

公开(公告)日：2022-04-12

申请号：US16208449

申请日：2018-12-03

Applicant: HRL Laboratories, LLC

Inventor： Hung Nguyen ,  Logan D. Sorenson ,  David L. Walter ,  Adour V. Kabakian ,  Raviv Perahia ,  Shuoqin Wang ,  David W. Shahan ,  Lian X. Huang ,  David T. Chang

IPC: E21B47/09 ,  E21B41/00 ,  G01P15/105 ,  G01P15/14 ,  G01C1/00 ,  G01C19/00 ,  E21B47/024 ,  E21B47/022 ,  G01P15/18

Abstract: An instrument package for use during the drilling a wellbore. The instrument package includes a plurality of instruments such as accelerometers, gyroscopes, and magnetometers; a computer is configured to determine the current position of the plurality of instruments from a set of measurements produced by the plurality of instruments; and wherein the plurality of instruments are mechanically isolated from a drill head assembly by one or more multi-degree of freedom vibration isolators. The computer preferably has at least two modes different analytical modes of analyzing the set of measurements produced by the plurality of instruments, including a continuous mode and a survey mode, the continuous mode being operational during times that active drilling is occurring and the survey mode being operational during times that the active drilling is not occurring.

公开(公告)号：US11066923B2

公开(公告)日：2021-07-20

申请号：US16018695

申请日：2018-06-26

Applicant: HRL LABORATORIES, LLC

Inventor： Shuoqin Wang ,  Logan D. Sorenson ,  David L. Walter ,  Adour V. Kabakian ,  Hung Nguyen ,  Raviv Perahia ,  David T. Chang

IPC: E21B7/04 ,  G01C19/5776 ,  E21B47/0228 ,  E21B47/06 ,  G01C21/16 ,  E21B47/022 ,  G01C17/02

Abstract: A method for generating an output of a downhole inertial measurement unit (IMU) includes: generating a trajectory between a plurality of survey points of a planned well data as a function of time, wherein the planned well data includes a plurality of three-dimensional coordinates corresponding to the survey points of an underground planned well are used to generate a trajectory comprising a plurality of trajectory coordinates between the consecutive ones of the survey points; generating sensor data for each of the trajectory coordinates as a function of time based on the geodetic reference parameters, the generated sensor data comprising: generated accelerometer output; generated gyroscopic output; and generated magnetometer output; and outputting the generated accelerometer output; the generated gyroscopic output; and the generated magnetometer output as a function of time as a generated output of the downhole IMU.

公开(公告)号：US10746758B2

公开(公告)日：2020-08-18

申请号：US15897819

申请日：2018-02-15

Applicant: HRL LABORATORIES, LLC

Inventor： Hung Nguyen ,  David T. Chang ,  Raviv Perahia ,  Logan D. Sorenson

IPC: G01P15/18 ,  G01P15/08 ,  G01P15/105 ,  G01P15/14 ,  G01R33/02 ,  G01R33/00 ,  G01C19/5783 ,  G01C21/16 ,  G01C17/28

Abstract: A microelectromechanical (MEMS) sensor suite including a three axis accelerometer including an accelerometer sensor polyhedron having a series of faces, and a series of axial accelerometers on three faces of the series of faces of the accelerometer sensor polyhedron. The MEMS sensor suite also includes a three axis magnetometer including a magnetometer sensor polyhedron having a series of faces, and a series of axial magnetometers on three faces of the series of faces of the magnetometer sensor polyhedron.

公开(公告)号：US10408622B2

公开(公告)日：2019-09-10

申请号：US15825067

申请日：2017-11-28

Applicant: HRL Laboratories, LLC

Inventor： Shuoqin Wang ,  Logan D. Sorenson ,  Hung Nguyen ,  David Chang ,  Raviv Perahia

IPC: E21B44/00 ,  G01C21/18 ,  G01C21/08 ,  G01C21/16 ,  G01C21/20 ,  E21B47/09 ,  E21B7/04

Abstract: Described is a system for incremental trajectory estimation of an implement. During operation, the system determines a time span of each stationary period of the implement based on accelerometer and gyroscopic data. Gyroscopic bias is then estimated based on the time span and gyroscopic data. An attitude of the implement is then estimated at each time step based on the estimated gyroscopic bias and gyroscopic data. Further, a traveling distance of the implement is estimated. Finally, a trajectory of the implement is estimated based on the estimated attitude and traveling distance. Given the trajectory estimate, an implement (e.g., drilling platform, vehicle, etc.) can be caused to alter its direction based on the trajectory estimate.