Boring or penetrating the earth – Automatic control
Reexamination Certificate
2008-04-15
2008-04-15
Dang, Hoang (Department: 3672)
Boring or penetrating the earth
Automatic control
C175S040000, C702S009000, C703S010000
Reexamination Certificate
active
07357196
ABSTRACT:
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.
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Goldman William A.
King William W.
Matthews, III Oliver
Pruitt Gerald L.
Weaver Gary E.
Baker & Botts L.L.P.
Dang Hoang
Halliburton Energy Service,s Inc.
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