Methods for designing fixed cutter bits and bits made using such methods
AssigneeSmith International, Inc.
InventorSujian HUANG
Life of this patent
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Abstract
In one aspect, the invention provides a method for modeling the dynamic performance of a fixed cutter bit drilling earth formations. In one embodiment, the method includes selecting a drill bit and an earth formation to be represented as drilled, simulating the bit drilling the earth formation. The simulation includes at least numerically rotating the bit, calculating bit interaction with the earth formation during the rotating, and determining the forces on the cutters during the rotation based on the calculated interaction with earth formation and empirical data.
Claims23
-24. (canceled)
A method of simulating a fixed cutter bit drilling an earth formation, the simulating comprising:
- a. selecting an earth formation;
- b. executing a simulation;
- wherein the executing comprises:
- i. accessing a database of determined forces and data representative of at least one of a force applied to a cutter a selected death of cut a selected orientation of the cutter and a geometric parameter of the cutter,
- ii. determining, based on the data accessed from the database, a force acting on at least one cutter,
- iii. rotating the bit and redetermining the force acting on the at least one cutter;
- and
- iv. repeating the rotating and redetermining until the force acting on the at least one cutter is optimized;
- and
- c. graphically displaying the fixed cutter bit.
(canceled)
(canceled)
Dependencies are inferred from the claim text.