Patent ID: 6276465
Filing Date: 2001-08-21
Classification: E21B,G01V

Abstract:
A method of providing an indicator of potential bit performance 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, and adapted to utilize a plurality of wellbore parameters, including said forensic wellbore data, which includes at least one rule matrix which defines a plurality of fuzzy sets which establish correspondence between said plurality of wellbore parameters and said indicator of potential bit performance;(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 and to produce as an output an indicator of potential bit performance in said particular wellbore.