In this study, a new coring system is designed that uses a positive displacement motor (PDM) connected to a core barrel and drill bit in combination with a hot-water drilling (HWD) system. The surface equipment and water hose are shared and the hot-water drill nozzle is replaced by the corer when a borehole is made by HWD. The hot water is then utilized to drive the PDM corer. In this paper, the concept of the PDM coring system is presented, along with a novel self-adaptable anti-torque device that can automatically adjust the diameter to adapt to an irregular borehole. The required force-energy parameters of the PDM are theoretically estimated. A PDM coring system is designed and assembled, and the feasibility of the concept is tested in the laboratory. The results indicate that it is more conducive to perform the coring at a lower temperature of water. At a temperature of 5 °C, a double-walled core-barrel works adequately to produce ice cores with a maximum diameter of 73 mm and an inner barrel diameter of 79 mm at a water flow rate of 96 L/min.

在这项研究中，设计了一种新的取芯系统，该系统使用与排芯管和钻头连接的正排量电动机（PDM）以及热水钻探（HWD）系统。在使用HWD钻孔时，地面设备和水管是共用的，热水钻头由型芯代替。然后利用热水来驱动PDM Corer。本文介绍了PDM取芯系统的概念，以及可以自动调节直径以适应不规则井眼的新型自适应防扭矩装置。理论上估计了PDM所需的力能参数。设计并组装了PDM取芯系统，并在实验室中测试了该概念的可行性。结果表明，更有利于在较低的水温下进行取芯。在5°C的温度下，双壁芯桶足以以96 L / min的水流量生产最大直径为73 mm，内桶直径为79 mm的冰芯。