【摘要】 摩擦热-机械碎岩钻进技术是利用钻头与岩石产生的摩擦热能加入弱化岩石,然后利用钻头上的切削元件切削碎岩。由于大部分岩石在高温和交变热应力作用下其强度、硬度以及磨蚀性都大幅度降低,因此提高了钻进效率。钻头摩擦元件采用了新型的耐摩擦耐高温的赛隆陶瓷材料,耐磨性是YG6硬质合金的3～5倍,而价格仅为硬质合金的1/10;对钻具和钻头的结构也进行了详细的论述;钻进试验表明:热机碎岩钻具摩擦元件能产生足够高的温度场(大于600℃);热机碎岩钻进技术是切实可行的,能提高钻进效率,降低钻进成本。更多还原

【Abstract】 Thermo-mechanical rock fragmentation drilling technology (TM ) is a kind of new drilling method, which firstly makes use of the friction energy produced by drill bit and rock to heat the rock, and then uses the cutting unit to complete the rock fragmentation. It improves the drilling efficiency and speed, because the physical properties such as intensity, hardness and wear resistance of most kinds of rock are weakened under high temperature and alternating heat stress conditions. The friction unit of TM bit is made of Sialon, of which the wear resistance is 28 times as much as that of YG alloy and the cost is only 110 times that of YG alloy. In the article, the author expatiates the structures and working principles of TM drill tool and bit in detail. Drilling experiment shows that the friction unit of TM bit can produce enough heat energy to high temperature(>600 ℃), TM drilling technology is feasible, it can improve drilling efficiency and decrease the cost of drilling.更多还原