3168152

Information

• Patent Grant
• 3168152

• References
• Source

• Patent Number

  3,168,152

• Date Filed

  Not available

• Date Issued

  Tuesday, February 2, 1965
  60 years ago

• CPC

  • E21B10/66 - the cutting element movable through the drilling pipe and laterally shiftable
  • E21B4/08 - impact being obtained by gravity only
  • E21B10/325 - the cutter being shifted by a spring mechanism
  • E21B10/64 - characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
  • E21B21/10 - Valve arrangements in drilling fluid circulation systems
  • E21B27/00 - Containers for collecting or depositing substances in boreholes or wells

• US Classifications

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