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Downhole gravity tool Patent #: 5970787
ApplicationNo. 09/630251 filed on 08/01/2000
US Classes:73/382R, GRAVITATIONAL DETERMINATION73/152.54, Downhole test73/382GGravitational variation
ExaminersPrimary: Chapman, Jeanette E.
Attorney, Agent or Firm
International ClassesG01V 7/16 (20060101)
G01V 7/00 (20060101)
G01V 7/08 (20060101)
Foreign Application Priority Data1999-08-03 GB
AbstractA 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.