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Multiple inserts of different geometry in a single row of a bit
   
Document Number
US Patent 7195078
Issued Date
March 27, 2007
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Abstract
A method for designing a roller cone drill bit having a plurality of cutting elements in a row. The method includes defining a pitch pattern for the plurality of cutting elements such that a first group of adjacent cutting elements are arranged in a first pitch and a second group of adjacent cutting elements are arranged in a second pitch in the row; evaluating the pitch pattern of the plurality of cutting elements in the row; and modifying at least one of the plurality of cutting elements, based on the evaluating the pitch pattern of the plurality of cutting elements.
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Number of Claims:
22
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Owner
Published
March 27, 2007
Application Number
10/886,474
Filed
July 7, 2004
US Classification
175/40   175/374 175/378
Int'l Classification
E21B   10/20   (20060101)  
Examiner
Attorney/Law Firm
USPTO Field of Search
175/40   175/374   175/378  
Related Patents
7377332 - Multiple inserts of different geometry in a single row of a bit - Owned by Smith International, Inc. (Houston, TX)

A method for designing a roller cone drill bit having a plurality of cutting elements in a row. The method includes defining a pitch pattern for the plurality of cutting elements such that a first group of adjacent cutting elements are arranged in a first pitch and a second group of adjacent cutting elements are arranged in a second pitch in the row; evaluating the pitch pattern of the plurality of cutting elements in the row; and modifying at least one of the plurality of cutting elements, based on the evaluating the pitch pattern of the plurality of cutting elements.

7434632 - Roller cone drill bits with enhanced drilling stability and extended life of associated bearings and seals - Owned by Halliburton Energy Services, Inc. (Carrollton, TX)

Roller cone drill bits may be formed with cutting elements and cutting structures having cutting element profile angles selected to minimize cone wobble and improve life of associated bearings and seals. Normal force axes of the cutting elements may intersect with each other as a force center. Crest points of the cutting elements may be disposed on one or more circles extending from the associated force center.

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