3392957

Information

• Patent Grant
• 3392957

• References
• Source

• Patent Number

  3,392,957

• Date Filed

  Not available

• Date Issued

  Tuesday, July 16, 1968
  56 years ago

• CPC

  • E21B6/00 - Drives for combined percussion and rotary drilling
  • E21B6/06 - the rotation being intermittent, e.g.obtained by ratchet device
  • Y10T137/86485 - Line condition change responsive release of valve

• US Classifications

  • 173 - Tool driving or impacting
  • 137 - Fluid handling