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Directional drilling control apparatus and methods

  • US 8,602,126 B2
  • Filed: 01/15/2013
  • Issued: 12/10/2013
  • Est. Priority Date: 09/21/2007
  • Status: Active Grant
First Claim
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1. An apparatus to steer a hydraulic motor when elongating a wellbore having a non-vertical component, comprising:

  • a quill adapted to transfer torque between a drive assembly and a drillstring;

    a bottom hole assembly (BHA) including a toolface orientation detector and at least one measurement while drilling (MWD) instrument or wireline-conveyed instrument; and

    a controller configured to transmit operational control signals to minimize friction between a drillstring and a wellbore;

    wherein the instrument is configured to detect pressure between an external surface of the BHA and an inner diameter of the wellbore.

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