Patents by Inventor William J. Wachtler

William J. Wachtler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • MWD tool for measuring weight and torque on bit
    Patent number: 4608861
    Abstract: A device for measuring the weight and torque on bit while drilling includes an outer bored cylindrical sleeve coaxially connectable into a drill string above a drill bit and an inner bored cylindrical sleeve welded coaxially within the outer sleeve. Strain gages located on the exterior surface of a necked-down section of the inner sleeve are isolated in an ambient pressure environment within annulus between the sleeves. Temperature compensation is accomplished by resistance temperature detectors sensing temperatures at the exterior surfaces of the respective sleeves.
    Type: Grant
    Filed: November 7, 1984
    Date of Patent: September 2, 1986
    Assignee: MacLeod Laboratories, Inc.
    Inventors: William J. Wachtler, Thomas M. Yang