Anti-corrosion device and method for oil pump

Abstract

The invention discloses an anti-corrosion device and method for an oil pump. The anti-corrosion device comprises an oil outlet short section, a double-way joint and an inserting tube, wherein the lower end of the oil outlet short section is connected with the double-way joint, a produced liquid passage and a lubricating anti-corrosion channel are formed in the double-way joint, the lower end of the inserting tube communicates with the lubricating anti-corrosion channel of the double-way joint, the upper end of the inserting tube extends into the oil outlet short section, the inserting tube andthe oil outlet short section form an annular space, the lower end of the produced liquid passage communicates with the interior space of a plunger, the upper end of the produced liquid passage communicates with an inner cavity of the oil outlet short section, one end of the lubricating anti-corrosion channel communicates with the lower port of the inserting tube, the other end of the lubricatinganti-corrosion channel communicates to the outer side of the outer wall of the dual-way joint, a radial producing hole is formed in the oil outlet short section, the upper port of the inserting tube is higher than the producing hole, and at the same time, the upper port of the inserting tube is lower than the upper port of the oil outlet short section. According to the anti-corrosion device and method for the oil pump, the self-enrichment principle of crude oil is utilized to change a lubricating medium between sealing pairs, so that the contact medium changing into oil from water in the sealing pairs is realized, and the anti-corrosion performance of the oil pump is further improved.

Description

technical field [0001] The invention relates to an oil well pump anticorrosion technology, in particular to an oil well pump anticorrosion device and method. Background technique [0002] During the normal working process of the oil well pump, an oil film will be formed in the gap between the plunger and the pump barrel, which plays a role of lubrication and anticorrosion. However, as the oilfield development enters the middle and later stages, the water content of the produced fluid increases, the gap between the plunger and the pump barrel cannot be lubricated by crude oil, and the friction coefficient increases, which intensifies the corrosion and wear of the oil well pump and reduces the oil pump lift. increase lifespan. [0003] Regarding the anticorrosion of oil well pumps, there are currently two main methods: one is to use surface treatment technologies such as chrome plating, nickel-phosphorus plating, spray welding, and coating to achieve anticorrosion, but the an...

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Problems solved by technology

[0007] After searching, no disclosed technical solution identical to the present invention was found

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