Methods for designing secondary cutting structures for a bottom hole assembly
First Claim
1. A method for designing a secondary cutting structure for a drilling assembly, the method comprising:
- defining a first cutting element arrangement for a first blade of a block;
modifying a design element of the first cutting element arrangement to produce a second cutting element arrangement for a second blade; and
disposing the first and second blades on the block, wherein the first and second cutting element arrangements are redundant.
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Abstract
A method for designing a secondary cutting structure for use in a bottom hole assembly, the method including defining initial design parameters for the secondary cutting structure and analyzing forces acting on the secondary cutting structure. Additionally, the method includes modifying at least one design element of the secondary cutting structure and simulating an effect of the modifying on both the secondary cutting structure and a primary cutting structure to determine if an improved condition is met. Also, a method for designing a drilling tool assembly, the method including defining initial drilling tool assembly design parameters including a primary cutting structure and a secondary cutting structure, and simulating a dynamic response of the drilling tool assembly. Additionally, the method includes adjusting at least one design element of the secondary cutting structure based on the dynamic response of the drilling tool assembly, determining if the adjusted design element improved a condition of the drilling, and repeating the simulating and adjusting until the condition is optimized.
25 Citations
19 Claims
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1. A method for designing a secondary cutting structure for a drilling assembly, the method comprising:
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defining a first cutting element arrangement for a first blade of a block; modifying a design element of the first cutting element arrangement to produce a second cutting element arrangement for a second blade; and disposing the first and second blades on the block, wherein the first and second cutting element arrangements are redundant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for designing a secondary cutting structure for a drilling assembly, the method comprising:
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defining a first cutting element arrangement for a first blade of a block; modifying a design element of the first cutting element arrangement to produce a second cutting element arrangement for a second blade; and disposing the first and second blades on the block in a plural set blade pattern. - View Dependent Claims (11, 12, 13)
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14. A method for selecting a drilling tool assembly, comprising:
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defining first initial design elements for a secondary cutting structure of a bottom hole assembly (BHA); performing a first dynamic simulation of the BHA based on the first initial design elements; presenting a first dynamic response of the BHA calculated from the first dynamic simulation. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification