3870113

Information

• Patent Grant
• 3870113

• References
• Source

• Patent Number

  3,870,113

• Date Filed

  Not available

• Date Issued

  Tuesday, March 11, 1975
  49 years ago

• CPC

  • E21B4/16 - Plural down-hole drives
  • E21B4/14 - Fluid operated hammers
  • B25D2250/291 - Tools having three or more parallel bits

• US Classifications

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