Blocking-proof oil extraction pump

Abstract

The invention relates to a blocking-proof oil extraction pump, which comprises a pump barrel, a travelling valve assembly, a plunger sleeve, a plunger and an eccentric fixed valve, the plunger sleeve is sleeved above a male buckle which connects the travelling valve assembly and the plunger and in an annular space between the travelling valve assembly and the pump barrel, lower-end threads of the pump barrel are connected with the eccentric fixed valve, a main body side of the eccentric fixed valve is provided with a fluid entering pore, and the other side is provided with a longitudinal pore channel; and the blocking-proof oil extraction pump can solve the problem of easy pump blocking when well liquid contains gravel or other impurities, thus guaranteeing safe and stable production of an oilfield.

Description

Technical field: [0001] The invention relates to an oil field oil production equipment, in particular to an oil pump. Background technique: [0002] The structure of conventional oil pump is as attached figure 1 As shown, it consists of a pump barrel (11), a traveling valve (12), a plunger (13) and a fixed valve (14). Conventional oil well pump is used in vertical well and pumping pure liquid under normal conditions. Its working principle is that when the plunger goes up, the space under it is freed, and the well fluid enters through the fixed valve. When the plunger goes down, the liquid passes through The swimming valve reaches the top of the plunger, so reciprocating, the well fluid is pumped out of the surface. [0003] In the process of pumping production, in some wells, the sand and gravel in the well fluid above the plunger may enter the gap between the plunger and the pump barrel due to the sand and gravel entering the pump with the produced fluid. Squeeze to deat...

AI Technical Summary

Problems solved by technology

[0003] In the process of oil pumping, some wells may enter the pump with the produced fluid, and the gravel in the well fluid above the plunger may enter the gap between the plunger and the pump barrel, and the plunger and the pump barrel will be separated. Squeeze to death, so that the plunger and the pump barrel cannot produce relative movement, resulting in pump jamming, and the gravel under the plunger may not all go up synchronously with the well fluid, and part of the gravel will settle in the pump barrel. When the pump barrel is overfilled, the plunger will not function properly

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