2915288

Information

• Patent Grant
• 2915288

• References
• Source

• Patent Number

  2,915,288

• Date Filed

  Not available

• Date Issued

  Tuesday, December 1, 1959
  65 years ago

• CPC

  • E21B4/16 - Plural down-hole drives
  • E02D7/28 - Placing of hollow pipes or mould pipes by means arranged inside the piles or pipes
  • E21B4/04 - Electric drives
  • E21B4/10 - continuous unidirectional rotary motion of shaft or drilling pipe effecting consecutive impacts
  • E21B4/18 - Anchoring or feeding in the borehole
  • E21B6/00 - Drives for combined percussion and rotary drilling
  • E21B7/006 - combined with a bucket-type container
  • E21B27/00 - Containers for collecting or depositing substances in boreholes or wells
  • E21B27/04 - where the collecting or depositing means including helical conveying means

• US Classifications

  • 175 - Boring or penetrating the earth
  • 173 - Tool driving or impacting