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Automatic standpipe pressure control in drilling

  • US 8,833,488 B2
  • Filed: 03/19/2012
  • Issued: 09/16/2014
  • Est. Priority Date: 04/08/2011
  • Status: Active Grant
First Claim
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1. A method of controlling standpipe pressure in a drilling operation, the method comprising:

  • comparing a measured standpipe pressure to a desired standpipe pressure while elongating a wellbore;

    outputting an annulus pressure set point based on the comparing; and

    automatically adjusting a choke in response to the outputting, thereby reducing a difference between the measured standpipe pressure and the desired standpipe pressure.

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