摘要
由于干热岩地层通常为火成岩,研磨性强、可钻性差,现有常规工艺方法钻进效率低,为此专门研制了用于干热岩钻进用的SC-86H型高能射流式液动锤,并对该高能射流式液动锤样机进行了地面钻进试验。试验采用可钻性等级为10级的完整花岗岩作为钻进对象,观测了冲锤质量、活塞行程和泵量对机械钻速的影响。试验结果表明:增大冲锤质量、活塞行程和泵量有利于提高机械钻速。试验过程中获得的最大机械钻速为5.19m/h,较常规回转钻进机械钻速提升显著。
Hot dry rock strata usually are of igneous rocks with strong abrasion and poor drillability. Because of the low drilling efficiency of conventional drilling methods, SC - 86H high energy liquid-jet hammer was specially developed for hot dry rock strata drilling, and the ground drilling tests were carried out on the prototype. Intact granite with drillability of grade X was taken as simulation strata, the effects of hammer mass, piston stroke and inputting flow rate on the drilling effi- ciency were studied. The test results show that increasing the hammer mass, piston stroke and inputting flow rate are bene- ficial to improve the drilling efficiency. The maximum ROP obtained in the tests is 5.19m/h, which is significantly more than that of conventional rotary drilling machines.
出处
《探矿工程（岩土钻掘工程）》
2016年第8期39-43,共5页
Exploration Engineering:Rock & Soil Drilling and Tunneling
基金
国土资源部公益性行业科研专项项目"干热岩快速钻井用高压高能射流式液动锤研究"(编号:201311112)
关键词
干热岩
钻进
可钻性
花岗岩
高能
射流式液动锤
机械钻速
hot dry rock
drilling
drillability
granite
high energy
liquid-jet hammer
rate of penetration
