3473609

Information

• Patent Grant
• 3473609

• References
• Source

• Patent Number

  3,473,609

• Date Filed

  Not available

• Date Issued

  Tuesday, October 21, 1969
  56 years ago

• CPC

  • F16K1/14 - with ball-shaped valve member
  • E21B21/10 - Valve arrangements in drilling fluid circulation systems
  • E21B33/16 - using plugs for isolating cement charge Plugs therefor
  • E21B34/14 - operated by movement of tools
  • Y10T137/1789 - Having pressure responsive valve
  • Y10T137/7855 - Valve seat threaded into a coupling element
  • Y10T137/7856 - Valve seat formed on or carried by a coupling element

• US Classifications

  • 166 - Wells
  • 137 - Fluid handling