3919958

Information

• Patent Grant
• 3919958

• References
• Source

• Patent Number

  3,919,958

• Date Filed

  Not available

• Date Issued

  Tuesday, November 18, 1975
  50 years ago

• CPC

  • E21B19/155 - Handling between horizontal and vertical position
  • B63B35/4413 - Floating drilling platforms
  • E21B7/128 - from floating support with independent underwater anchored guide base
  • E21B15/02 - specially adapted for underwater drilling
  • E21B19/002 - specially adapted for underwater drilling
  • E21B19/09 - specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
  • E21B19/143 - specially adapted for underwater drilling
  • E21C50/02 - dependent on the ship movements

• US Classifications

  • 114 - Ships
  • 166 - Wells
  • 175 - Boring or penetrating the earth