该钻具由异径接头1、短接管3和8、带导向头（球座）2的管4、座板5、喷嘴6、承喷器7、带纵向孔9和12的异径接头10、锥形阀13、弹簧14、支承15、过滤器16和岩芯管17组成（见图）。在弹簧14伸张作用下，锥形阀13堵塞异径接头上的纵向孔12，并经 The drill consists of a reducer 1, short pipes 3 and 8, a pipe 4 with a guide head (ball seat) 2, a seat plate 5, a nozzle 6, a blowout preventer 7, a reducer 10 with longitudinal holes 9 and 12 , A conical valve 13, a spring 14, a support 15, a filter 16 and a core tube 17 (see figure). Under the action of the spring 14, the conical valve 13 blocks the longitudinal bore 12 in the adapter and passes through it