3662825

Information

• Patent Grant
• 3662825

• References
• Source

• Patent Number

  3,662,825

• Date Filed

  Not available

• Date Issued

  Tuesday, May 16, 1972
  52 years ago

• CPC

  • E21B49/088 - combined with sampling
  • E21B34/12 - operated by movement of casings or tubings
  • E21B34/125 - with time delay systems

• US Classifications

  • 166 - Wells