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​When I disassembled the long plunger sand control subsurface pump that had been used for almost a year with the customer on site, the first thing I noticed was that the wear on the contact surface between the plunger and the pump barrel was almost negligible. The customer's words at the time impressed me deeply: "I didn't expect that this well condition could withstand so long." This pump is the 25 106th long plunger sand control pump we recommended. Their oil wells are typical well sections with high sand content and strong liquid corrosiveness. Many customers asked us, what does the 25 106th model mean? We are used to explaining that 25 is the diameter of the pump barrel, 106 represents the length, and th is the version with enhanced structure. In practical applications, it is not just a parameter number, but also represents a type of pump type structure optimized for the problem of "high wear, high sand, and easy to get stuck".