| 热-机碎岩孕镶金刚石钻头的设计及试验研究 |
| 投稿时间：2021-09-19 修订日期：2022-02-03 点此下载全文 |
| 引用本文：常思,刘宝昌,韩哲,等.热-机碎岩孕镶金刚石钻头的设计及试验研究[J].钻探工程,2022,49(2):77-84.CHANG Si,LIU Baochang,HAN Zhe,et al. Design and test of the impregnated diamond drill bit assisted by frictional heat[J]. Drilling Engineering, 2022,49(2):77-84. |
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| 中文摘要:为提高钻进效率，合理利用钻进过程中产生的热量，本文采用摩擦热能辅助机械能碎岩（简称：热-机碎岩）的方法，将氮化硅作为摩擦元件引入孕镶金刚石钻头中，以提高钻头工作层的钻进性能。本文通过对钻头水口、摩擦元件的尺寸计算，钻头胎体、结构的设计，制造了一种新型热-机碎岩孕镶金刚石钻头（简称：热-机碎岩钻头），并与常规六水口钻头和三水口钻头开展了室内钻进试验对比。结果表明，与六水口钻头和三水口钻头相比，热-机碎岩钻头加入摩擦元件后能够因摩擦生热而使岩石产生弱化作用，钻头钻速提高，在相同钻井液流量下最高可比六水口钻头的机械钻速高33.3%。热-机碎岩钻头胎体的磨损程度比三水口钻头小，热-机碎岩钻头可用于强研磨性地层的钻进。 |
| 中文关键词:热-机碎岩 摩擦元件 孕镶金刚石钻头 钻头设计 钻进试验 |
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| Design and test of the impregnated diamond drill bit assisted by frictional heat |
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| Abstract:In order to improve drilling efficiency and make proper use of the heat generated during drilling， this paper investigates the thermo-mechanical rock fragmentation method by which ceramic material is added as a friction element to the impregnated diamond bit to improve the mechanical properties of the working layer. A new type of thermo-mechanical diamond bit was manufactured by calculating the size of the water ports and friction elements， and designing the bit matrix and structure， and compared with the conventional six-water-port and the three-water-way bits（the same structure as that of the thermo-mechanical diamond bit except for the friction element in the matrix） in lab drilling test. The results showed that， compared with the six-water-port and the three-water-port bits， the thermo-mechanical diamond bit with the friction element can generate heat and weaken the rock， and increase the drilling speed. At the same flow rate， the maximum ROP was 33.3% higher than that of the six-water-port bit. The matrix of the thermomechanical diamond bit had a small degree of wear than the three-water-port bit， and the thermo-mechanical diamond bit can be used for drilling highly abrasive formations. |
| keywords:thermo-mechanical rock fragmentation friction element impregnated diamond bit bit design drilling experiment |
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