Patents Assigned to Oil-Well Drilling Control, Inc.
  • Oil well service tool
    Patent number: 4413516
    Abstract: Apparatus for reducing landing shock for instruments run into earth boreholes through drill string bores and to maintain azimuthal orientation being protected with enclosing structure. An instrument package has a depending spear point for engaging a baffle in the drill string. The spear point encloses a spring and fluid damped shock absorber. The instrument package further includes a second internal fluid damped shock absorber and a spring type rotary shock absorber for the measuring instrument.
    Type: Grant
    Filed: March 19, 1982
    Date of Patent: November 8, 1983
    Assignee: Oil-Well Drilling Control, Inc.
    Inventors: Robert E. Croom, Jr., John D. Jeter