3882474

Information

• Patent Grant
• 3882474

• References
• Source

• Patent Number

  3,882,474

• Date Filed

  Not available

• Date Issued

  Tuesday, May 6, 1975
  49 years ago

• CPC

  • G01P21/02 - of speedometers
  • E21B19/00 - Handling rods, casings, tubes or the like outside the borehole
  • E21B44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator
  • E21B45/00 - Measuring the drilling time or rate of penetration
  • E21B47/00 - Survey of boreholes or wells
  • G01P1/11 - by the detection of the position of the indicator needle
  • G01P3/44 - for measuring angular speed

• US Classifications

  • 340 - Communications: electrical
  • 073 - Measuring and testing