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Method and apparatus for drilling optimum subterranean well boreholes

  • US 5,390,748 A
  • Filed: 11/10/1993
  • Issued: 02/21/1995
  • Est. Priority Date: 11/10/1993
  • Status: Expired due to Fees
First Claim
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1. A method of drilling a borehole through formations of the earth, to a targeted position relative to the entrance to the well at the surface of the earth with a drilling mechanism including a drill bit having an orientable bit drilling face secured immediate the distal end of a drilling conduit, comprising the steps of:

  • a. providing;

    (i) means at the surface of the earth for manipulating the drilling conduit, the drilling mechanism, and the drill bit;

    (ii) means within the borehole for continuously sensing, converting, and telemetering to a receiving means data relating to the location and orientation of the borehole and the drilling mechanism;

    (iii) receiving means for continuously receiving from the sensing means the current orientation and location of the drilling mechanism, and the current orientation and location of the borehole;

    b. inserting into the borehole through said entrance a drilling conduit including the drilling mechanism and the drill bit;

    c. continuously sensing the current orientation and position in the borehole of the drilling mechanism, and the orientation and location of the borehole;

    d. continuously converting to downhole acoustic or radio frequency signals the continuously sensed data in step "c";

    e. transmitting the acoustic or radio frequency signals through the telemetry means to the earth'"'"'s surface; and

    f. converting at the surface of the earth the telemetry signals received by the receiving means to control signals for re-orientation of the bit drilling face, whereby any such re-orientation results in the borehole being drilled at an optimum trajectory from the entrance to the borehole to any targeted position below the surface of the earth.

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