E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 10/08 (2006.01) E21B 44/00 (2006.01)
Patent
CA 2522162
A method for simulating the drilling performance of a roller cone bit drilling an earth formation may be used to generate a visual representation of drilling, to design roller cone drill bits, and to optimize the drilling performance of a roller cone bit. There is provided a method for optimizing a design of a roller cone drill bit, comprising simulating the bit drilling through a selected earth formation; adjusting at least one design parameter of the bit; repeating the simulating the bit drilling; and repeating the adjusting and simulating until an optimized design is determined. There is also provided a method for designing a roller bit cone, comprising simulating the drill bit drilling through an earth formation, the simulating comprising determining, based on a means for determining an axial force, an axial force acting on each of the cutting elements, determining the axial force acting on each of the roller cones, based on the axial force acting on the cutting elements, rotating the bit and redetermining the axial forces acting on each of the cutting elements, repeating the rotating and redetermining for a number of rotations, and adjusting at least one bit design parameter, and repeating the simulating and adjusting until a difference between the axial force on each one of the roller cones is less than a difference between the axial force determined prior to adjusting the at least one initial design parameter.
Cawthorne Chris E.
Huang Sujian
Borden Ladner Gervais Llp
Smith International Inc.
LandOfFree
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