3181628

Information

• Patent Grant
• 3181628

• References
• Source

• Patent Number

  3,181,628

• Date Filed

  Not available

• Date Issued

  Tuesday, May 4, 1965
  59 years ago

• CPC

  • E21B25/18 - the core receiver being specially adapted for operation under water
  • E21B7/122 - with submersible vertically movable guide
  • E21B17/01 - Risers

• US Classifications

  • 175 - Boring or penetrating the earth