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DETERMINING GRAVITY TOOLFACE AND INCLINATION IN A ROTATING DOWNHOLE TOOL

  • US 20150330210A1
  • Filed: 12/27/2012
  • Published: 11/19/2015
  • Est. Priority Date: 12/27/2012
  • Status: Active Grant
First Claim
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1. A system for determining gravity toolface and inclination, comprising:

  • a downhole tool;

    a sensor assembly disposed in a radially offset location within the downhole tool, wherein the sensor assembly comprises three accelerometers and an angular rate sensing device;

    a processor in communication with the sensor assembly, wherein the processor is coupled to at least one memory device containing a set of instruction that, when executed by the processor, cause the processor toreceive an output from the sensor assembly;

    determine at least one of a centripetal acceleration and a tangential acceleration of the downhole tool based, at least in part, on the output; and

    determine at least one of a gravity toolface and inclination of the downhole tool using at least one of the centripetal acceleration and the tangential acceleration.

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