Patents Assigned to Wetherford U.S., Inc.
  • Stuck pipe locator system
    Patent number: 5375476
    Abstract: A system for locating a stuck pipe is disclosed which, in one aspect, includes a tool with a removable bi-sensor cartridge assembly which has at least two autonomous independent sensors, one for sensing torsion and one for sensing tension. The sensors may also be used to indicate temperature downhole. A method is disclosed for locating stuck pipe using such a sensor and using a slip joint according to the present invention. In one aspect the slip joint has a housing, a mandrel, and a two conductor coil cord assembly.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: December 27, 1994
    Assignee: Wetherford U.S., Inc.
    Inventor: Kevin L. Gray