Appeal 2007-1474
Application 10/192,833
SUMMARY OF DECISION
We REVERSE.
THE INVENTION
Appellant’s claimed invention is to a method for selecting and designing
drill bits for drilling boreholes so that petroleum fluid extraction from subsurface
formations is optimized (Specification 1:9-11). Claims 1 and 6, reproduced below,
are representative of the subject matter on appeal.
1. A method for drilling a borehole through a production
zone underlying an overburden of various earth
formations, the method comprising:
drilling the borehole through the overburden with
at least one drill bit selected to optimize at least one
drilling performance parameter; and
drilling the borehole through at least part of the
production zone with at least one other drill bit selected
to optimize at least one production performance
parameter.
6. A method for selecting parameters to optimize a
production performance parameter in a drilled borehole,
comprising:
selecting initial bit design parameters and initial
drilling operating parameters;
simulating drilling of a selected earth formation,
the simulating including determining at least one
parameter related to production performance in the
selected earth formation;
2
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