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有五种不同直径的克芮留式割管器，即91公厘，110公厘、129公厘、148公厘与170公厘。克芮留式割管器的结构，包括本体（1），本体上端车有螺丝扣（2），能以连接在岩心管的下端。本体顶部另车有小直径螺丝扣，以便安装缸筒（3），缸筒的顶部有小孔（4）和上盖（5），清水或泥浆能从小孔进入缸筒来操纵柱塞（6）。柱塞（6）与本体（1）系滑动配合；柱塞顶部装有皮碗（8）的支撑环（7），前者用螺母（9）压紧。本体下端开有槽子和小孔，中间容纳四个钢球（10），钢球被弹簧圈（11）顶于适当位置，柱塞下端必须具有这样的直径，即当压力施加到缸筒（3）内之前，柱塞被四个钢球顶托在适当位置。
There are five different diameters of Kerui left pipe cutter, namely 91 mm, 110 mm, 129 mm, 148 mm and 170 mm. The structure of Ke Rui Reunion pipe cutter includes a body (1), a screw fastener (2) on the upper end of the body and can be connected to the lower end of the core pipe. A small diameter turnbuckle is mounted on the top of the body to allow the cylinder (3) to be installed. The top of the cylinder has a small hole (4) and a cover (5). Water or mud can enter the cylinder from the small hole to operate the plunger 6). The plunger (6) is in sliding fit with the body (1); the top of the plunger is provided with a supporting ring (7) of the cup (8), the former being pressed by a nut (9). The lower end of the body is provided with a groove and a small hole, and the middle contains four steel balls (10) which are put in place by a spring ring (11). The lower end of the piston must have such a diameter that when pressure is applied to the cylinder ), The plunger is held in place by the four steel balls.