3830320

Information

• Patent Grant
• 3830320

• References
• Source

• Patent Number

  3,830,320

• Date Filed

  Not available

• Date Issued

  Tuesday, August 20, 1974
  50 years ago

• CPC

  • E21B25/00 - Apparatus for obtaining or removing undisturbed cores
  • E21B25/02 - the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
  • E21B25/04 - the core receiver having a core forming cutting edge or element
  • E21B25/14 - mounted on pivot transverse to core axis
  • E21B25/18 - the core receiver being specially adapted for operation under water

• US Classifications

  • 175 - Boring or penetrating the earth