Patents Represented by Attorney Dave Gordon

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  • Apparatus and method for measuring differential pressure while drilling
    Patent number: 4805449
    Abstract: An apparatus and method for measuring differential pressure of mud internal a drill string and mud in a borehole annulus is disclosed.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: February 21, 1989
    Assignee: Anadrill, Inc.
    Inventor: Pralay K. Das