The casing pump includes the pressure test device, speed reducer and sealing cup.
套管泵由压力检测装置、减速装置和密封皮碗等组成。
A new sealing cup has been developed, and the problems of gas leak and iron filings accumulation existing in former sealing cup-type plugging have been solved.
研究出新型皮碗，解决了原皮碗式封堵存在的燃气泄漏和积存铁屑问题。
A new sealing cup has been developed, and the problems of gas leak and iron filings accumulation existing in former sealing cup-type plugging have been solved.
研究出新型皮碗，解决了原皮碗式封堵存在的燃气泄漏和积存铁屑问题。
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