使用绳索取心钻具钻进的特点是对冲洗液提出一定的要求，如在弱变质沉积岩层和泥质岩层中钻进尤其如此。由于钻具与孔壁之间的间隙小，对上升的固相粘性冲洗液流，如泥浆、氯化钙溶液等产生了补充的流体阻力。此外，由于溶液的分离作用，在钻杆的内表面形成坚实的泥皮，阻碍岩心容纳管的下降，也有可能成为绞车钢绳断裂的原因。 The use of rope coring tools to drill is characterized by certain requirements of the flushing fluid, such as drilling in weakly metamorphosed sedimentary and argillaceous formations. Due to the small gap between the tool and the wall of the bore, additional fluid resistance is created to the rising flow of the solid viscous flushing fluid, such as mud, calcium chloride solution, and the like. In addition, due to the separation of the solution, a solid mud skin is formed on the inner surface of the drill pipe, which hinders the drop of the core receiving pipe and may also cause the rope of the winch to break.