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Method and apparatus for determining drill string movement mode

  • US 20050071120A1
  • Filed: 10/01/2004
  • Published: 03/31/2005
  • Est. Priority Date: 04/19/2002
  • Status: Active Grant
First Claim
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1. A method for determining a mode of movement in a drill string, comprising:

  • measuring lateral acceleration of the drill string;

    determining a lateral position of the drill string with respect to time from the acceleration measurements; and

    determining the mode from the position with respect to time.

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