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US 11,768,980 B2Granted
Wear analysis of drill bits
AssigneeNational Oilwell Varco, L.P.
InventorsReza Rahmani, Afshin Babaie Aghdam
Life of this patent
Estimating the term…
Abstract
A method includes receiving a drill bit design. The design specifies a design parameter for a plurality of cutter elements of a drill bit. The method also includes estimating a temperature value for the cutter elements based on the design parameter and a drilling parameter; estimating a wear value for the cutter elements based on the design parameter and the temperature value; updating a value of the design parameter for at least one of the cutter elements based on the wear value and a time period; and using the updated design parameter value, repeating the steps of estimating the temperature value, estimating the wear value, and updating the design parameter value until the design parameter value for the at least one of the cutter elements reaches a threshold value.
Claims18
A method, comprising:
- a) receiving a first drill bit design that specifies a design parameter for each of a plurality of cutter elements of a drill bit;
- b) estimating a temperature value for each of the cutter elements based on the design parameter and a drilling parameter;
- c) estimating a wear value for each of the cutter elements based on the design parameter and the temperature value;
- d) generating an updated design parameter value for at least one of the cutter elements based on the wear value for the at least one cutter element and a time period;
- using the updated design parameter value as the design parameter for the at least one of the cutter elements, repeating steps b) through d) until the updated design parameter value for the at least one of the cutter elements reaches a threshold value;
- estimating a rate of penetration over time for the first drill bit design based on a change in the design parameter over time until the updated design parameter value for the at least one of the cutter elements reaches the threshold value;
- estimating a first run length for the first drill bit design based on a change in the rate of penetration over time until the updated design parameter value for the at least one of the cutter elements reaches the threshold value;
- generating a second drill bit design by updating a geometry of cutter elements in the first drill bit design, a geometry of drilling fluid nozzles in the first drill bit design, or a combination thereof;
- and
- producing a drill bit based on the second drill bit design,
- wherein an estimated run length for the second drill bit design is greater than the first run length.
8 more elements
A non-transitory, computer-readable medium containing instructions that, when executed by a processor, cause the processor to:
- a) receive a first drill bit design that specifies a design parameter for each of a plurality of cutter elements of a drill bit;
- b) estimate a temperature value for each of the cutter elements based on the design parameter and a drilling parameter;
- c) estimate a wear value for each of the cutter elements based on the design parameter and the temperature value;
- d) generate an updated design parameter value for at least one of the cutter elements based on the wear value for the at least one cutter element and a time period;
- using the updated design parameter value as the design parameter for the at least one of the cutter elements, repeat steps b) through d) until the updated design parameter value for the at least one of the cutter elements reaches a threshold value;
- estimate a rate of penetration over time for the first drill bit design based on a change in the design parameter over time until the updated design parameter value for the at least one of the cutter elements reaches the threshold value;
- estimate a first run length for the first drill bit design based on a change in the rate of penetration over time until the updated design parameter value for the at least one of the cutter elements reaches the threshold value;
- generate a second drill bit design by updating a geometry of cutter elements in the first drill bit design, a geometry of drilling fluid nozzles in the first drill bit design, or a combination thereof;
- and
- produce a drill bit based on the second drill bit design,
- wherein an estimated run length for the second drill bit design is greater than the first run length.
8 more elements
A system, comprising:
- one or more processors;
- and
- one or more memories coupled to the one or more processors, wherein the memories are configured to store a first drill bit design that specifies a design parameter for each of a plurality of cutter elements of a drill bit, and wherein the memories comprise instructions that, when executed by the one or more processors, cause the one or more processors to be configured to:
- a) receive the first drill bit design from the one or more memories;
- b) estimate a temperature value for each of the cutter elements based on the design parameter and a drilling parameter;
- c) estimate a wear value for each of the cutter elements based on the design parameter and the temperature value;
- d) generate an updated design parameter value for at least one of the cutter elements based on the wear value for the at least one cutter element and a time period;
- using the updated design parameter value as the design parameter for the at least one of the cutter elements, repeat steps b) through d) until the updated design parameter value for the at least one of the cutter elements reaches a threshold value;
- estimate a rate of penetration over time for the first drill bit design based on a change in the design parameter over time until the updated design parameter value for the at least one of the cutter elements reaches the threshold value;
- estimate a first run length for the first drill bit design based on a change in the rate of penetration over time until the updated design parameter value for the at least one of the cutter elements reaches the threshold value;
- generate a second drill bit design by updating a geometry of cutter elements in the first drill bit design, a geometry of drilling fluid nozzles in the first drill bit design, or a combination thereof;
- and
- produce a drill bit based on the second drill bit design,
- wherein an estimated run length for the second drill bit design is greater than the first run length.
11 more elements
Dependencies are inferred from the claim text.