3313347

Information

• Patent Grant
• 3313347

• References
• Source

• Patent Number

  3,313,347

• Date Filed

  Not available

• Date Issued

  Tuesday, April 11, 1967
  57 years ago

• CPC

  • E21B7/122 - with submersible vertically movable guide
  • E21B33/035 - specially adapted for underwater installations
  • E21B41/10 - Guide posts

• US Classifications

  • 166 - Wells
  • 175 - Boring or penetrating the earth
  • 248 - Supports