3236309

Information

• Patent Grant
• 3236309

• References
• Source

• Patent Number

  3,236,309

• Date Filed

  Not available

• Date Issued

  Tuesday, February 22, 1966
  58 years ago

• CPC

  • E21B33/12955 - using drag blocks frictionally engaging the inner wall of the well
  • Y10S285/922 - Safety and quick release for drill pipes

• US Classifications

  • 166 - Wells
  • 285 - Pipe joints or couplings