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Methods for optimizing efficiency and durability of rotary drag bits and rotary drag bits designed for optimal efficiency and durability
Methods for optimizing efficiency and durability of rotary drag bits and rotary drag bits designed for optimal efficiency and durability
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机译:优化旋转式钻头效率和耐用性的方法以及为最佳效率和耐用性而设计的旋转式钻头
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摘要
A method for evaluating existing drill bits and drill bit designs includes measuring several desired characteristics of a bit, including the wear experienced in drilling a formation, such as an actual formation or a simulated formation or a laboratory test fixture. A computer model may be used to evaluate the work-force and/or the sliding-wear rates that cutting elements of the bit experience as compared with the rate-of-penetration and/or durability of the bit. This information may be used to design a new drill bit, which may involve modification of the cutting elements (e.g., moving the location, volume (size and shape) or number of cutting elements from areas of the bit that receive lower work-force and sliding-wear rates to those areas that experience relatively greater work-force and sliding wear-rates. This may permit the cutting elements to be oriented more aggressively relative to a formation to be drilled. Other parameters that may be optimized include the bit profile, blade count, hydraulics, or the like.
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