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AssigneeHalliburton Energy Services, Inc.
InventorsWilliam A. Goldman, Oliver Matthews, III, William W. King, Gary E. Weaver, Gerald L. Pruitt
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A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specifications of proposed drilling equipment for use in the drilling of the well bore, and predicting a drilling mechanics in response to the specifications as a function of the geology characteristic per unit depth according to a prescribed drilling mechanics model. Responsive to a predicted-drilling mechanics, a controller controls a parameter in the drilling of the well bore. The geology characteristic includes at least rock strength. The specifications include at least a bit specification of a recommended drill bit. Lastly, the predicted drilling mechanics include at least one of bit wear, mechanical efficiency, power, and operating parameters. A display is provided for generating a display of the geology characteristic and predicted drilling mechanics per unit depth, including either a display monitor or a printer.
An apparatus for predicting the performance of a drilling system comprising:
The apparatus of claim 11, wherein bit wear is determined as a function of cumulative work done according to a bit wear model and expressed in the form of at least one representation selected from the group consisting of a curve representation and a percentage graph representation, wherein
The apparatus of claim 13, wherein mechanical efficiency is further represented in the form of a percentage graph illustrating drilling system operating constraints that have an adverse impact upon mechanical efficiency, the drilling system operating constraints corresponding to constraints that result in an occurrence of frictional constrained torque, the percentage graph further for indicating a corresponding percentage of impact that each constraint has upon the frictional constrained torque component of the mechanical efficiency at a given depth, wherein
A computer implemented method for predicting the performance of a drilling system comprising:
The method of claim 17, wherein adjusting the drilling mechanics model includes modifying the model for at least one of the formation and the drilling system.
The method of claim 28, wherein providing an indicator of the geology characteristic includes displaying at least one graphical representation selected from the group consisting of a curve representation, a percentage graph representation, and a band representation, and
The method of claim 29, wherein bit wear is determined as a function of cumulative work done according to a bit wear model and expressed in the form of at least one representation selected from the group consisting of a curve representation and a percentage graph representation, wherein
The method of claim 31, wherein mechanical efficiency is further represented in the form of a percentage graph illustrating drilling system operating constraints that have an adverse impact upon mechanical efficiency, the drilling system operating constraints corresponding to constraints that result in an occurrence of frictional constrained torque, the percentage graph further for indicating a corresponding percentage of impact that each constraint has upon the frictional constrained torque component of the mechanical efficiency at a given depth, wherein
A computer program stored on a computer-readable medium for execution by a computer for predicting the performance of a drilling system, said computer program comprising:
Dependencies are inferred from the claim text.