| 孕镶金刚石钻头磨损机理研究 |
| Received:December 16, 2022 Revised:September 12, 2023 点此下载全文 |
| 引用本文：杨 展.孕镶金刚石钻头磨损机理研究[J].Geology and Exploration,2024,60(2):407-413 |
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| 基金项目:国家自然科学基金项目（编号：42272365）资助 |
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| 中文摘要:孕镶金刚石钻头通过钻头胎体的持续磨损实现金刚石的自锐和高效破岩。因此，研究金刚石钻头磨损的影响因素及其影响程度和影响机理，对孕镶金刚石钻头的设计和使用非常重要。本次研究探讨了岩石物理力学性质、钻头胎体性能和钻进工艺参数等因素对孕镶金刚石钻头磨损过程和磨损机理的影响。分析表明，对钻头磨损最为显著的影响因素是岩石中的硬质颗粒导致的磨粒磨损，其次是钻头胎体与岩粉之间的粘着磨损，以及冲洗液中岩粉颗粒导致的冲蚀磨损。在此基础上，以不同硬度的钻头胎体摩擦磨损试验结果为例，探讨了钻头胎体性能及其内部硬质点对钻头磨损的影响机理。该研究成果可为科学设计与合理使用孕镶金刚石钻头提供依据。 |
| 中文关键词:孕镶金刚石钻头 磨粒磨损 粘着磨损 冲蚀磨损 |
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| Analysis of the wear mechanism of impregnated diamond bits |
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| Abstract:Impregnated diamond bits are subjected to continuous wear of drill bit matrix in order to achieve self-sharpening and efficient rock breaking. It is therefore very important for the design and use of impregnated diamond bits to study the influencing factors, degree and mechanism of diamond bit wear. This work analyzed the effects of rock physical and mechanical properties, drill bit matrix properties and drilling technology and parameters on the wear process and wear mechanism of impregnated diamond bits. Results show that the drill bit wear is dominated by abrasive wear caused by hard particles in rock, followed by adhesive wear between drill bit surface and rock debris, and erosion wear caused by rock debris in flushing fluid. On this basis, the friction and wear test results of drill bit matrix with different hardness were taken as an example to discuss the influence mechanism of drill bit matrix properties and internal hard points on drill bit wear. This research can provide reference for scientific design and rational use of impregnated diamond bits. |
| keywords:impregnated diamond bit, abrasive wear, adhesive wear, erosion wear |
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