3896887

Information

• Patent Grant
• 3896887

• References
• Source

• Patent Number

  3,896,887

• Date Filed

  Not available

• Date Issued

  Tuesday, July 29, 1975
  49 years ago

• CPC

  • E21B7/02 - Portable drilling rigs, truck-or skid-mounted, with their own drive
  • E21B15/04 - specially adapted for directional drilling
  • E21B19/08 - Apparatus for feeding the rods or cables Apparatus for increasing or decreasing the pressure on the drilling tool Apparatus for counterbalancing the weight of the rods
  • Y10S173/03 - Lubrication

• US Classifications

  • 173 - Tool driving or impacting