91单动三重半合管钻具的研制与应用

Development of 91 Single-action Triple Coupling Pipe Core Drilling Tools and Its Application

摘要:

为了提高松软复杂地层岩矿心采取率和岩矿心的质量，弥补普通双管钻具取心功能的不足，特别研制了91单动三重半合管钻具。介绍了钻具的结构、工作原理、组装、维护保养及在3个不同矿区5个钻孔的野外生产应用情况。应用结果表明，该钻具适宜松散地层钻进，岩矿心采取率达到了100%，同时防止了岩矿心被外界扰动，保持了岩矿心的原状性，提高了岩矿心的质量并利于岩矿心后期的运输与储藏。

Abstract:

In order to improve the core recovery and the quality in complex soft strata to compensate the functions of common double-pipe drilling tools, 91 single-action triple coupling pipe drilling tool was particularly developed. This paper introduces the drilling tool about its structure, working principle, assembly, maintenance and the field application in 5 boreholes of 3 different mining areas. The application results show that this drilling tool is suitable for loose formation drilling with core recovery up to 100% and with no core disturbance. The cores are kept being undisturbed, the improved cores quality is benefited for post transportation and storage.