3299972

Information

• Patent Grant
• 3299972

• References
• Source

• Patent Number

  3,299,972

• Date Filed

  Not available

• Date Issued

  Tuesday, January 24, 1967
  58 years ago

• CPC

  • E21B11/06 - with driven cutting chains or similarly driven tools
  • E21B4/02 - Fluid rotary type drives
  • E21B10/32 - with expansible cutting tools
  • E21B10/66 - the cutting element movable through the drilling pipe and laterally shiftable

• US Classifications

  • 175 - Boring or penetrating the earth