3661424

Information

• Patent Grant
• 3661424

• References
• Source

• Patent Number

  3,661,424

• Date Filed

  Not available

• Date Issued

  Tuesday, May 9, 1972
  53 years ago

• CPC

  • E21B43/281 - using heat
  • F24J3/085 - by injecting a working fluid directly into the ground or by using underground water
  • Y02E10/14 - Systems injecting medium directly into ground
  • Y10S159/902 - using natural heat

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 159 - Concentrating evaporators
  • 165 - Heat exchange