目前,我国各油矿所使用之压裂及固井泵,其阀座与泵头(或称缸体)的联接,大都采用锥度联接(锥度为1:5),这种锥度联接的阀座,有结构简单、不易跳动等一系列的优点;但最大的问题是拆卸困难,特别是在用过较长的时间以后,要想拔起阀座就更加困难。过去,有的矿区为了拔出阀座,往往采用氧气刺割的方法,这样既不方 At present, most fracturing and cementing pumps used in various oil mines in China are connected by taper coupling (taper 1: 5) between the valve seat and the pump head (or cylinder). The taper-connected valve seat, The structure is simple, not easy to jump and a series of advantages; but the biggest problem is the difficulty of disassembly, especially after a long time, to pull up the seat more difficult. In the past, some mining areas in order to pull out the seat, often using oxygen stabbing method, so neither