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Drilling control method and system

  • US 9,175,557 B2
  • Filed: 03/01/2010
  • Issued: 11/03/2015
  • Est. Priority Date: 03/02/2009
  • Status: Active Grant
First Claim
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1. A drilling control method for automatically triggering a remedying action responsive to an evolving or existing critical condition, the method comprising the steps of:

  • (i) calculating process parameter boundaries which represent a critical condition for a well by using calibrated drilling process models,(ii) triggering an emergency action if a process parameter exceeds said process parameter boundaries, said emergency action being intended to minimize the effect of said critical condition,(iii) then further analyzing the well in order to determine a remedying action to then be applied, the remedying action being intended to remedy the cause of said critical condition, the remedying action being determined dynamically as a function of the response of the well to the remedying action;

    (iv) if said remedying action is not capable of remedying the cause of said critical condition, then applying predetermined safe process parameters or shutting down.

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