Under pump mechanical mixing medicine doping pipe column of oil well pump

Abstract

The invention discloses an under pump mechanical mixing medicine doping pipe column of an oil well pump. The pipe column comprises an oil pipe, a hollow sucker rod, an oil well pump sealing connecting-tripping device, the oil well pump, a rotary connecting device and an under pump mechanical mixer; the hollow sucker rod is arranged inside the oil pipe; the lower end of the hollow sucker rod is connected with a plunger of the oil well pump through the oil well pump sealing connecting-tripping device; and the rotary connecting device and the under pump mechanical mixer are sequentially connected with the lower part of the plunger of the oil well pump. The under pump mechanical mixer comprises an outer pipe, a plurality of gears and a plurality of impellers, wherein a rack axially penetrates through the interior of the outer pipe; the gears are respectively meshed with the rack; each gear penetrates through a connecting rod in a connecting way; two ends of the connecting rod are rotationally connected with the inner side wall of the outer pipe; and the impellers are connected with the connecting rod and positioned on two sides of the gears. The pipe column brings the effect of emulsification viscosity reduction of viscosity reducer into full play, and greatly improves the viscous oil recovery effect.

Description

technical field [0001] The invention relates to a mechanical mixing and dosing pipe string under the pump of an oil well pump, which is mainly aimed at chemical viscosity-reducing production of oil wells with dosing. Background technique [0002] Heavy oil reserves are relatively abundant in my country's oil fields, but due to its high colloid and bitumen content and poor fluidity, it is difficult to exploit. Usually, heavy oil is exploited by mixing thin oil for viscosity reduction, hollow rod electric heating, and chemical agent for viscosity reduction. The effect of chemical agent emulsification and viscosity reduction depends on the degree of full and uniform mixing of chemical agent and heavy oil in the downhole. [0003] The existing process of mixing thin oil in the casing annulus is based on the principle of similar miscibility, which generally reduces the viscosity of the mixed liquid, but naturally mixes with heavy oil by gravity. Usually, only by increasing the oi...

AI Technical Summary

Problems solved by technology

[0003] The existing process of mixing thin oil in the casing annulus is based on the principle of similar miscibility, which generally reduces the viscosity of the mixed liquid, but naturally mixes with heavy oil by gravity. Usually, only by increasing the oil mixing ratio can normal production be satisfied. To a certain extent Caused a waste of thin oil resources

[0004] In order to achieve the ideal mixing effect for existing mixers that rely on the flow rate of downhole fluid, the downhole fluid flow must reach a certain speed, and the downhole fluid supply must be sufficient, which limits the application.

Most of the existing mechanical mixers have complex structures and high processing costs

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