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Drilling system utilizing downhole dysfunctions for determining corrective actions and simulating drilling conditions

  • US 6,021,377 A
  • Filed: 10/23/1996
  • Issued: 02/01/2000
  • Est. Priority Date: 10/23/1995
  • Status: Expired due to Term
First Claim
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1. A system for drilling from surface wellbores in subsurface formations from a surface , comprising:

  • (a) a drill string having(i) a drilling assembly carrying a drill bit at a bottom end of the drilling assembly for drilling a wellbore,(ii) a plurality of sensors carried by the drill string making measurements of a plurality of drill string parameters during drilling of the wellbore,(iii) a processor carried by the drilling assembly computing from said measurements values of the drill string parameters, and(iv) a transmitter associated with the drill string transmitting signals representative of the values of the drill string parameters to the surface; and

    (b) a computer at the surface receiving the transmitted signals, said computer categorizing said received signals into a plurality of severity levels for each said drill string parameter, at least one such level indicative of a dysfunction for each said selected drill string parameter, said computer further displaying said categorized levels on a display.

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