Geometrical instruments – Indicator of direction of force traversing natural media – Gyroscopically controlled or stabilized
Reexamination Certificate
2011-02-01
2011-02-01
Johnson, Amy Cohen (Department: 2841)
Geometrical instruments
Indicator of direction of force traversing natural media
Gyroscopically controlled or stabilized
C033S356000, C033S324000, C702S092000
Reexamination Certificate
active
07877887
ABSTRACT:
An apparatus and method for compensation of the effects of various bias errors encountered by inertial rate gyroscopes, particularly vibrating element gyroscopes, configured to detect heading relative to true north. Certain embodiments are suitable for reducing rotational dynamic errors associated with rotating gyroscopes. Other embodiments may include compensation of biases not related to rotational dynamics, such as thermal drift. The various methods disclosed may also account for the bias by sampling the rotational vector of the earth at an arbitrary heading, and at a heading that is 180° offset from the arbitrary heading. The sequence may be repeated numerous times to compensate for bias drift. The bias drift may be constant with respect to time (linear) or changing over time (non-linear) during the data acquisition sequence. Some embodiments include methods that utilize data from accelerometers to infer the bank and elevation angles as well as earth latitude location relative to the equator.
REFERENCES:
patent: 3346966 (1967-10-01), Gates
patent: 3753296 (1973-08-01), Van Steenwyk
patent: 3890718 (1975-06-01), Gregerson et al.
patent: 4199869 (1980-04-01), Van Steenwyk
patent: 4231252 (1980-11-01), Cherkson
patent: 4511848 (1985-04-01), Watson
patent: 4537067 (1985-08-01), Sharp et al.
patent: 4611405 (1986-09-01), Van Steenwyk
patent: 4614040 (1986-09-01), Hyulsing, II et al.
patent: 4920655 (1990-05-01), Van Steenwyk
patent: 5117559 (1992-06-01), Sindlinger et al.
patent: 5194872 (1993-03-01), Musoff et al.
patent: 5272922 (1993-12-01), Watson
patent: 5287295 (1994-02-01), Ives et al.
patent: 5375336 (1994-12-01), Nakamura
patent: 5789671 (1998-08-01), Fernandez
patent: 5806195 (1998-09-01), Uttecht et al.
patent: 6347282 (2002-02-01), Estes et al.
patent: 6529834 (2003-03-01), Estes et al.
patent: 6918186 (2005-07-01), Ash et al.
patent: 7801704 (2010-09-01), Sato et al.
patent: 2003/0014874 (2003-01-01), Brunstein et al.
patent: 2005/0126022 (2005-06-01), Hansberry et al.
patent: 2010/0198518 (2010-08-01), Ekseth et al.
patent: 0 056 447 (1981-10-01), None
patent: 0 250 608 (1990-03-01), None
Partial European Search Report, dated Mar. 5, 2009.
N.P. Callas, “Computing Directional Surveys with a Helical Method” Society of Petroleum Engineers Journal, Dec. 1976, pp. 327-336.
John Wright, “Rate Gyro Surveying of Wellbores in the Rocky Mountains” Society of Petroleum Engineers, 1983, pp. 269-275.
F. L. Gibbons; U. Hense; Eastman Christensen, “A Three-Axis Laser Gyro System for Borehole Wireline Surveying” Society of Petroleum Engineers, 1987, pp. 277-282.
Small-Diameter Inertial-Grade sensors significantly enhance Wellbore Survey Accuracy, pp. 223-232.
Peter L. Cook, “Monitoring the Three-Dimensional Position and Three-Axis Rotation of Submerged Structures” Society of Petroleum Engineers of AIME, Aug. 1981, pp. 1557-1564.
G.W. Uttecht, J. P. Dewardt “Application of Small-Diameter Inertial Grade Gyroscopes Significantly Reduces Borehole Position Uncertainty” IADC/SPE, 1983, pp. 31-40.
David John Camden; Jean-Eugene Gartner, “A New Continuous Guidance Tool Used for High Accuracy Directional Surveys” Society of Petroleum Engineers of AIME, 1981.
J. B. Kelsey, “A Wellbore Inertial Navigation System” IADC/SPE, 1983.41-46.
Anthony C. Scott; John W. Wright, “A New Generation Directional Survey System Using Continuous Gyrocompassing Techniques” Society of Petroleum Engineers of AIME, 1982, pp. 1-8.
M. Thorp, “An Analysis of Discrepancies Between Gyro Surveys” SPE/IADC, 1987.
J. L. Thorogood, “Discussion of Evaluation of Directional Survey Errors at Prudhoe Bay” SPE Drilling Engineer, Sep. 1988, pp. 334-335.
Mark A. Stephenson; Harry Wilson “Improving Quality Control of Directional Survey Data with Continuous Inertial Navigation” SPE Drilling Engineering, Jun. 1992, pp. 100-106.
European Office Action (EP 08 253 680.6), dated Oct. 13, 2010.
Cohen Johnson Amy
Patterson Thuente Christensen Pedersen , P.A.
Watson Industries Inc.
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