Patents by Inventor Harold Dean Eastin

Harold Dean Eastin 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).

  • Method and apparatus for de-icing oilwells
    Patent number: 6260615
    Abstract: A power cable for an ESP is used also for heating well bores in cold climates. An electrical switch is located within a wellbore at a selected location in the power cable. The electrical switch is provided to selectively short out the conductors within the power cable, thereby allowing the power cable above the switch to be used as a resistive heating element to thaw the wellbore. While the switch is open, power supplied to power cable drives ESP in a normal manner.
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: July 17, 2001
    Assignee: Baker Hughes Incorporated
    Inventors: Larry Verl Dalrymple, Harold Dean Eastin, Thomson Hall Wallace