Methods for designing single cone bits and bits made using the methods

• US 20050165592A1
• Filed: 12/10/2004
• Published: 07/28/2005
• Est. Priority Date: 03/13/2000
• Status: Active Grant

• Current Assignee: Smith International Incorporated (SLB)
• Original Assignee: Smith International Incorporated (SLB)
• Inventors: Huang, Sujian J.
• Granted Patent: US 7,426,459 B2
• Time in Patent Office: Days
• US Class Current: 703/7
• CPC Class Codes: E21B 10/16 characterised by tooth form or arrangement

Abstract

Methods of designing a single cone roller cone bit, and bits made using those methods are disclosed. In particular, methods of graphically displaying a single cone roller cone bit interacting with a formation is shown. In one method, a value of at least one design parameter for the single cone roller cone drill bit according to the graphical display is adjusted. The simulating, displaying and adjusting to change a simulated performance of the single cone roller cone drill bit may be repeated as necessary.

Claims

2. The method of claim 1, further comprising selecting an initial bit design, drilling parameters and an earth formation to be simulated prior to simulating the single cone roller cone drill bit drilling.

6. The method of claim 2, wherein the displaying and adjusting is repeated until an optimized single cone roller cone drill bit design is achieved.

8. A method for generating a visual representation of a single cone roller cone bit drilling in earth formations, comprising:

simulating the single cone roller cone drill bit drilling in an earth formation;

calculating visual representation parameters from the simulating; and

converting the visual representation parameters into said visual representation.

9. The method of claim 9, wherein the simulating comprises monitoring at least one of a bending moment, a penetration depth, cutting area, relative wear, tensile stress, compressive stress, circumferential force, radial force, vertical force, torque on bit, cone contact force, cone to bit speed ratio, row spacing, intra-insert spacing, and scraping area.

10. A method for optimizing drill performance of a single roller cone bit design, comprising:

selecting a single cone roller cone bit design, drilling parameters, and an earth formation desired to be drilled;

calculating a performance of the selected bit design using the selected drilling parameters on the selected earth formation;

adjusting at least one parameter according to the performance; and

repeating the calculating and adjusting until optimized drill performance is achieved.

12-1. The method of claim 16, wherein the optimal set of drilling parameter comprises at least one of weight on bit and rotational speed of the bit.

13. The method of claim 10, further comprising outputting drill performance parameters.

1. A method for designing a single cone roller cone drill bit, comprising:

simulating the single cone roller cone drill bit drilling in an earth formation; and

graphically displaying at least a portion of the simulating.

3. The method of claim 1, further comprising adjusting a value of at least one design parameter for the single cone roller cone drill bit according to the graphical display and repeating the simulating, displaying and adjusting to change a simulated performance of the single cone roller cone drill bit.

4. The method of claim 1, wherein the graphical display comprises displaying at least one of a bending moment, a penetration depth, cutting area, relative wear, tensile stress, compressive stress, circumferential force, radial force, vertical force, torque on bit, cone contact force, cone to bit speed ratio, and scraping area.

5. The method of claim 1, further comprising analyzing data accumulated during the simulating, wherein the analyzing comprises viewing information associated with at least one of a bending moment, a penetration depth, cutting area, relative wear, tensile stress, compressive stress, circumferential force, radial force, vertical force, torque on bit, cone contact force, cone to bit speed ratio, row spacing, intra-insert spacing, and scraping area.

7. A roller cone bit designed using the method of claim 3.

12. The method of claim 10, further comprising analyzing a relationship between drilling parameters and drill performance.

14. The method of claim 10, wherein the drill performance parameters comprise at least one of a bending moment, a penetration depth, cutting area, relative wear, tensile stress, compressive stress, circumferential force, radial force, vertical force, torque on bit, cone contact force, cone to bit speed ratio, row spacing, intra-insert spacing, and scraping area.

15. The method of claim 13, further comprising rejecting the imported bit design for manufacture.

16. The method of claim 15, further comprising redesigning the imported bit design.

17. The method of claim 13, wherein the analyzing comprises viewing information associated with at least one of a bending moment, a penetration depth, cutting area, relative wear, tensile stress, compressive stress, circumferential force, radial force, vertical force, torque on bit, cone contact force, cone to bit speed ratio, row spacing, intra-insert spacing, and scraping area.

13-2. A method for designing a single cone roller cone drill bit, comprising:

importing a single cone roller cone bit design into a simulation software;

simulating a performance for the bit design; and

analyzing the performance of the bit design.

14-3. The method of claim 13, further comprising accepting the imported bit design for manufacture.