Gravity measuring apparatus
Patent 6612171 Issued on September 2, 2003. Estimated Expiration Date: 
August 1, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 1, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesRing laser gravity gradiometer Automated borehole gravity meter system Superconducting bearing for borehole and survey gravimeters Borehole gravity density measuring system Downhole gravity tool Patent #: 5970787 InventorsAssigneeApplicationNo. 09/630251 filed on 08/01/2000US Classes:73/382R, GRAVITATIONAL DETERMINATION73/152.54, Downhole test73/382GGravitational variationExaminersPrimary: Chapman, Jeanette E.Attorney, Agent or FirmInternational ClassesG01V 7/16 (20060101)G01V 7/00 (20060101) G01V 7/08 (20060101) Foreign Application Priority Data1999-08-03 GBAbstractA gravity measuring apparatus is provided comprising a gravitational force detector including a test mass and which produces measurements related to gravitational force exerted on the test mass, characterized in that the gravitational force detector is adapted for use downhole and includes a compensator to compensate for errors in measurements made whilst downhole. The compensator may comprise a guide rail along which the gravitational force detector is moveable over a calibrated distance. Where the test mass is biased toward an equilibrium position about which measurements are made.Other References
| |
