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首页> 外文期刊>Engineering failure analysis >Experimental study of an Al_2O_3/WC-Co nanocomposite based on a failure analysis of hammer bit
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Experimental study of an Al_2O_3/WC-Co nanocomposite based on a failure analysis of hammer bit

机译:基于锤头破坏分析的Al_2O_3 / WC-Co纳米复合材料的实验研究

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摘要

Percussion drilling has been widely used in oil and gas industry because of its significant increase in the rate of penetration (ROP) over ordinary mud drilling, yet the drilling tool (especially hammer bit) failures happen frequently, which restrict applications of percussion drilling. Using the method of the rock-breaking mechanism, the reasons for hammer bit failure are analysed, and the results show that the mechanical properties of the bit tooth material, which is WC-Co cemented carbide, are not suitable for the coupling action of impact spalling, impact fatigue and abrasive wear. Hammer bit failure is mainly caused by tooth loss, tooth fracture and tooth wear.
机译:由于冲击钻进速度(ROP)比普通泥浆钻进速度显着提高,因此冲击钻进已在石油和天然气工业中得到广泛应用,但是钻探工具(尤其是锤头)的故障频繁发生,这限制了冲击钻进的应用。采用破岩机理的方法,分析了锤钻头失效的原因,结果表明,WC-Co硬质合金钻头齿材料的力学性能不适合冲击耦合作用。剥落,冲击疲劳和磨料磨损。锤头损坏主要是由于牙齿脱落,牙齿断裂和牙齿磨损引起的。

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