Method of designing a drill bit, and bits made using said method

• US 20050051361A1
• Filed: 10/21/2004
• Published: 03/10/2005
• Est. Priority Date: 08/16/2000
• Status: Active Grant

• Current Assignee: Amardeep Singh, Scott Mcdonough, Sujian Huang
• Original Assignee: Amardeep Singh, Scott Mcdonough, Sujian Huang
• Inventors: Singh, Amardeep, Huang, Sujian, McDonough, Scott
• Granted Patent: US 7,302,374 B2
• Time in Patent Office: Days
• US Class Current: 175/40
• CPC Class Codes: E21B 10/08 Roller bits E21B10/26 takes precedence; roller core bits E21B10/06; characterised by wear resisting parts E21B10/50
• CPC Class Codes: E21B 10/16 characterised by tooth form or arrangement
• CPC Class Codes: E21B 10/50 the bit being of roller type

Abstract

A method for designing a drill bit that involves simulating a drill bit having cutting elements disposed thereon is provided. In particular, the method involves determining the axial forces acting on at least one of the cutting elements at a first orientation

Claims

1. A method of designing a drill bit, comprising:

simulating the drill bit drilling through an earth formation, the simulating comprising;

determining, based on a means for determining, an axial force acting on a cutting element having a first orientation;

adjusting the orientation of the cutting element to a second orientation; and

determining, based on a means for determining, the axial force acting on the cutting element at the second orientation.

2. The method of claim 1 further comprising:

determining a rate of penetration for the drill bit having the cutting element at the first orientation; and

determining the rate of penetration for the drill bit having the cutting element at the second orientation.

3. A drill bit made in accordance with the methods of claims 1 or 2.

4. A method of designing a drill bit, comprising:

simulating the drill bit drilling through an earth formation, the simulating comprising;

graphically displaying a crater formed by a cutting element having a first orientation;

adjusting the orientation of the cutting element to a second orientation; and

graphically displaying a crater formed by the cutting element having the second orientation.