Horizontal sand prevention vicious pump

Abstract

A horizontal sand prevention vicious pump comprises a pump cylinder assembly, a fixing valve assembly and a plunger piston assembly. The plunger piston assembly is inserted into the pump cylinder assembly and the fixing valve assembly. The pump cylinder assembly comprises a pump cylinder coupling, an upper pump cylinder, a gap bridge outer tube and a guide sleeve. The fixing valve assembly comprises a fixing valve and a lower pump cylinder. The plunger piston assembly comprises a pull rod coupling, a pull rod, an upper plunger piston, a travelling valve, a pull rod joint and a lower plunger piston. A strike-off cup with an inward small end is arranged at the upper end of the upper plunger piston, the upper end of the pull rod is connected with an oil pumping rod pillar through the pull rod coupling, and the lower end of the pull rod is in series connection with the lower plunger piston into a whole through the pull rod joint. The upper plunger piston is sleeved outside the pull rod, and can move vertically along the pull rod. The horizontal sand prevention vicious pump can effectively reduce accidents of pump clamping, pulling and plugging caused by sand production of an oil well, removes eccentric wear between the pump cylinders and the plunger pistons, and has mechanical forced on and off function.

Description

technical field [0001] The invention relates to an oil field equipment, in particular to a horizontal sand control heavy pumping pump which has the function of sand control and is suitable for the exploitation of horizontal heavy oil wells. Background technique [0002] At present, the number of horizontal heavy oil wells in oilfields is increasing, and the phenomenon of sand production is also very serious. When conventional pumping pumps are used for oil production in horizontal heavy oil wells with sand production, there are the following problems: 1. The sand cannot be fully washed by the oil flow, and it is easy to Deposits in the plunger gap or in the valve housing, causing stuck pumps, strains and blocked valve housing flow passages. At the same time, the sand particles in the heavy oil also aggravate the wear of the plunger, pump barrel and valve seat. 2. Affected by the horizontal state and the viscous resistance of heavy oil, the floating valve ball and the fixed ...

AI Technical Summary

Problems solved by technology

[0002] At present, the number of horizontal heavy oil wells in oilfields is increasing, and the phenomenon of sand production is also very serious. When conventional pumping pumps are used for oil production in horizontal heavy oil wells with sand production, there are the following problems: 1. The sand cannot be fully washed by the oil flow, and it is easy to Deposits in the plunger gap or inside the valve housing, causing stuck pumps, strains and blocked valve housing flow passages

At the same time, the sand particles in the heavy oil also aggravate the wear of the plunger, pump barrel and valve seat

2. Affected by the horizontal state and the viscous resistance of heavy oil, the floating valve ball and the fixed valve ball are not closed in time and the seal is not tight, resulting in increased leakage and reduced pump efficiency

3. Affected by the force of gravity, the plunger and the pump barrel are seriously eccentrically worn

The above problems shorten the inspection cycle of the thickening pump, reduce the oil production efficiency and increase the oil production cost

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