3724558

Information

• Patent Grant
• 3724558

• References
• Source

• Patent Number

  3,724,558

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1973
  51 years ago

• CPC

  • E21B44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator
  • Y10T137/1007 - With manual valve control
  • Y10T137/1044 - With other condition responsive valve control

• US Classifications

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