Patents by Inventor Arun P. Karle

Arun P. Karle 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).

  • Drill string shock absorber
    Patent number: 3963228
    Abstract: In accordance with an illustrative embodiment of the present invention as disclosed herein, a shock absorber adapted to be incorporated in a drill string includes axially splined housing and mandrel members having a helical coil spring reacting therebetween to absorb longitudinal vibration and shock loads and otherwise attenuate exciting forces generated by the drill bit. The coil spring has a low spring rate and is enclosed between the housing and a hollow flow tube that is slidably sealed with respect to the housing and the mandrel.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: June 15, 1976
    Assignee: Schlumberger Technology Corporation
    Inventor: Arun P. Karle