3602320

Information

• Patent Grant
• 3602320

• References
• Source

• Patent Number

  3,602,320

• Date Filed

  Not available

• Date Issued

  Tuesday, August 31, 1971
  53 years ago

• CPC

  • E21B7/12 - Underwater drilling
  • E21B7/132 - from underwater buoyant support
  • E21B15/02 - specially adapted for underwater drilling

• US Classifications

  • 175 - Boring or penetrating the earth