应用在出砂油井上的长柱塞式防砂泵 ,具有长柱塞短泵筒与环空沉砂相结合的独特结构 ,还具有防砂卡、防砂埋、防砂磨等功能 ,能有效地延长油井免修期。现场 70 0多井次的应用表明 ,该泵使用寿命和油井生产周期较常规泵延长 2倍以上 ,而且还扶起了一批长期停产井 ,为出砂油井提供了一种可靠的新的采油设备和技术。 The long plunger type sand control pump used in sand production wells has the unique structure of long plunger short pump cylinder combined with annular grit. It also has the functions of sand control card, sand control and sand control, which can effectively extend the oil well Free repair period. More than 70 0 on-site applications showed that the pump life and oil well production cycle more than 2 times longer than the conventional pump, but also raised a number of long-term shutdown wells for sand production wells provide a reliable new oil production Equipment and technology.