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Devices and methods for dynamic boring procedure reconfiguration

  • US 8,220,564 B2
  • Filed: 08/27/2008
  • Issued: 07/17/2012
  • Est. Priority Date: 08/27/2007
  • Status: Active Grant
First Claim
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1. A method of switching horizontal directional drilling procedures during bore path turning, comprising:

  • identifying a hierarchal arrangement of a plurality of different boring procedures utilizing different boring techniques, the hierarchy arrangement representing boring procedures of increasing ability to bore through harder soil while changing a trajectory of a boring tool;

    boring a first leg of a curved bore path using a boring tool connected to a drill rig by a drill string, the first leg being bored using a first boring procedure of the plurality of different boring procedures;

    monitoring a plurality of boring parameters during boring of the first leg, the plurality of boring parameters comprising;

    torsional pressure of the drill string;

    rotational travel of the drill string;

    hydraulic pressure; and

    axial displacement; and

    switching from boring the first leg of the curved bore path using the first boring procedure to boring a second leg using a second boring procedure of the plurality of boring procedures, the switch based on one or more of the boring parameters deviating past a threshold.

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