3845816

Information

• Patent Grant
• 3845816

• References
• Source

• Patent Number

  3,845,816

• Date Filed

  Not available

• Date Issued

  Tuesday, November 5, 1974
  50 years ago

• CPC

  • E21B33/12955 - using drag blocks frictionally engaging the inner wall of the well

• US Classifications

  • 166 - Wells