Patent ID: 6386297
Filing Date: 2002-05-14
Classification: E21B,E21C

Abstract:
A method of providing an indicator of potential for abrasive wear of a drill bit in a particular wellbore, comprising:(a) obtaining forensic wellbore data from at least one previously drilled wellbore which is determined to be comparable to said particular wellbore; (b) providing an inference engine computer program consisting of executable program instructions which includes a rule matrix, and which is adapted to utilize a plurality of wellbore parameters, including said forensic wellbore data; (c) loading said inference engine computer program on to a data processing system; (d) supplying as an input to said inference engine computer program said forensic wellbore data and at least one other of said plurality of wellbore parameters; and (e) utilizing said data processing system to execute program instructions of said inference engine computer program to apply said input to said inference engine computer program, with at least a portion of said input being supplied to said rule matrix, and to produce as an output an indicator of potential for abrasive wear of a drill bit in said particular wellbore.