2894727

Information

• Patent Grant
• 2894727

• References
• Source

• Patent Number

  2,894,727

• Date Filed

  Not available

• Date Issued

  Tuesday, July 14, 1959
  65 years ago

• CPC

  • E21B10/04 - with core destroying means
  • E21B4/16 - Plural down-hole drives
  • E21B10/06 - Roller core bits
  • E21B10/16 - characterised by tooth form or arrangement
  • Y10S285/922 - Safety and quick release for drill pipes

• US Classifications

  • 175 - Boring or penetrating the earth
  • 285 - Pipe joints or couplings