3338321

Information

• Patent Grant
• 3338321

• References
• Source

• Patent Number

  3,338,321

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1967
  57 years ago

• CPC

  • E21B11/06 - with driven cutting chains or similarly driven tools
  • E21B4/006 - Mechanical motion converting means
  • E21B4/02 - Fluid rotary type drives
  • E21B4/16 - Plural down-hole drives

• US Classifications

  • 175 - Boring or penetrating the earth