2341574

Information

• Patent Grant
• 2341574

• References
• Source

• Patent Number

  2,341,574

• Date Filed

  Not available

• Date Issued

  Tuesday, February 15, 1944
  80 years ago

• CPC

  • E21B25/00 - Apparatus for obtaining or removing undisturbed cores
  • C09K8/34 - Organic liquids
  • E21B25/08 - Coating, freezing, consolidating cores Recovering uncontaminated cores or cores at formation pressure
  • E21B36/00 - Heating, cooling, insulating arrangements for boreholes or wells
  • E21B36/003 - Insulating arrangements
  • E21B47/065 - Measuring temperature
  • E21D5/012 - Use of fluid-tight or anti-friction material on outside of, or between, lining layers

• US Classifications

  • 166 - Wells
  • 175 - Boring or penetrating the earth
  • 392 - Electric resistance heating devices