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油田使用的RRC—H200型热油熔蜡车是一种通过将加热的原油注入油井套管中而实现清蜡的作业设备,所配备的输液泵为卧式双缸双作用活塞泵,其缸套直径为φ85mm,采用铁芯挂胶活塞。在现场作业过程中,由于加热的原油粘度大、温度和压力高,这种活塞的使用寿命很短,使用40小时左右就得更换。然而因备件缺乏,只得停车,无法正常进行清蜡工作,这严重地影响了检泵作业和油井生产。针对这种情况,我们自行改制了一种新型铸铁活塞。实践表明,这种改制的铸铁活塞具有耐磨、耐高温高压的优点,使用寿命极长,从而解决了缺乏备件的问题,并获得显著的经济效益。
The RRC-H200 hot-melt wax car used in the oil field is a kind of working equipment for de-waxing by injecting heated crude oil into well casing. The provided infusion pump is a horizontal double-cylinder double acting piston pump, Sleeve diameter is φ85mm, using iron core hanging plastic piston. During field work, due to the viscosity of heated crude oil, high temperature and pressure, the piston has a short service life and needs to be replaced after about 40 hours of use. However, due to lack of spare parts, only parking, can not be normal waxing work, which seriously affected the pump operation and oil well production. In response to this situation, we adapted a new cast iron piston. Practice shows that the modified cast iron piston has the advantages of wear resistance, high temperature and pressure, long service life, thus solving the problem of lack of spare parts and obtain significant economic benefits.