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US 2018/0088552 A1Published application
Method of Designing and Optimizing Fixed Cutter Drill Bits Using Dynamic Cutter Velocity, Displacement, Forces and Work
AssigneeSmith International, Inc.
InventorsAndrew Dow, Crystal Brown Mayer, Carlos Alberto Armada, Balasubramanian Durairajan
Life of this patent
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Abstract
A method includes simulating a cutting tool drilling an earth formation by incrementally rotating the cutting tool at a plurality of time intervals, determining a true trajectory of a cutting element disposed on the cutting tool for the duration of the plurality of time intervals, and determining a dynamic work profile for the cutting element based on the true trajectory and a force acting on the cutting element at each time interval.
Claims23
A method, comprising:
- simulating a cutting tool drilling an earth formation, comprising incrementally rotating the cutting tool at a plurality of time intervals;
- determining a true trajectory of a cutting element disposed on the cutting tool for the duration of the plurality of time intervals;
- and
- determining a dynamic work profile for the cutting element based on the true trajectory and a force acting on the cutting demerit at each time interval.
1 more element
A method of designing a bottom hole assembly, comprising:
- simulating drilling an earth formation using the bottom hole assembly;
- determining one or more cutting elements subjected to cyclic loading;
- altering at least one input parameter selected from the group consisting of cutting tool parameters, drilling operating parameters and bottom hole assembly parameters;
- and
- repeating simulating, determining and altering until a desired cutting tool design is reached.
2 more elements
A bottom hole assembly comprising:
- a cutting tool having a tool body;
- a first cutting element disposed on the tool body in a first region subjected to a first cyclic loading profile in a simulation of the bottom bole assembly;
- and
- a second cutting element disposed on the tool body in a second region subjected to a second cyclic loading profile in the simulation of the bottom hole assembly, wherein the first cyclic loading profile has one or more of a greater average amplitude, a greater average frequency, and a greater average duration relative to the second cyclic loading profile;
- the first cutting element having one or more of a greater fatigue strength and a greater impact resistance than the second cutting element.
2 more elements
Dependencies are inferred from the claim text.