Long plunger oil pump for preventing sand and scale

Abstract

The invention discloses a long plunger oil pump for preventing sand and scale, and particularly relates to the field of oil pumps. The long plunger oil pump comprises an outer barrel. An oil outflow barrel is fixedly mounted on the top of the outer barrel, an oil outflow valve is fixedly mounted in the oil outflow barrel, the oil outflow valve is fixedly sleeved with a top protective sleeve, the outer barrel is fixedly sleeved with a sand separating box located below the oil outflow valve, a long plunger located below the oil outflow valve is fixedly mounted in the outer barrel, the middle ofthe long plunger is fixedly sleeved with a plug cone, the upper end and the lower end of the long plunger are fixedly sleeved with stirring assemblies, and the bottom of the long plunger is fixedly sleeved with a lower oil outflow valve. In the actual operation process, when the oil outflow valve descends, a piston sleeve is stored inwards through air pressure, thus, leak holes are formed, at themoment, sticky oil and gravel located at the bottom are rapidly discharged, the gravel is finally removed from the positions where the amount of the gravel is maximal, and it is guaranteed that the oil pump runs normally.

Description

technical field [0001] The invention relates to the technical field of oil well pumps, more specifically, the invention relates to a long plunger oil well pump for sand and scale prevention. Background technique [0002] The long plunger sand control pump adopts a long plunger, a short pump barrel, a sand sinking under the pump, and a lateral oil inlet structure. The working principle of its sand blocking and sand grinding is the joint action of the sand retaining ring and the leakage fluid. , to prevent sand particles from entering the sealing gap between the plunger and the pump barrel, thereby eliminating sand jams, reducing the wear of the pump barrel and plunger, and protecting the surface strengthening layer. When the oil well stops pumping, the sinking sand particles will sink into the lower liner of the pump along the sand sinking annulus, and will not accumulate on the pump like conventional pumps, avoiding sand burying the sucker rod. [0003] The existing plunger...

AI Technical Summary

Problems solved by technology

However, heavy oil must enter the oil inlet valve on the small plunger. Limited by the diameter of the small plunger, the diameter of the oil inlet valve is small, the valve ball and flow channel are small, and the oil inlet resistance is large. When working in heavy oil wells, the valve ball It will fail, causing the pump to not work, causing the oil well to not produce oil. The main storage places for sand and gravel are located between the short pump barrel and the long plunger and near the lower oil outlet valve.

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