3421580

Information

• Patent Grant
• 3421580

• References
• Source

• Patent Number

  3,421,580

• Date Filed

  Not available

• Date Issued

  Tuesday, January 14, 1969
  56 years ago

• CPC

  • E21B19/09 - specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
  • E21B17/01 - Risers
  • E21B33/035 - specially adapted for underwater installations
  • E21B33/0375 - Corrosion protection means
  • E21B33/038 - Connectors used on well heads
  • E21B33/043 - specially adapted for underwater well heads
  • E21B41/02 - in situ inhibition of corrosion in boreholes or wells

• US Classifications

  • 166 - Wells