2251916

Information

• Patent Grant
• 2251916

• References
• Source

• Patent Number

  2,251,916

• Date Filed

  Not available

• Date Issued

  Tuesday, August 12, 1941
  83 years ago

• CPC

  • E21B43/292 - using steerable or laterally extendable nozzles
  • E21B7/068 - drilled by a down-hole drilling motor

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 175 - Boring or penetrating the earth