CN2538974Y - Oil well layered oil recovery pump - Google Patents

Abstract

The utility model discloses an oil well layered oil extraction pump, which comprises a pump barrel, a fixed valve, a hollow plunger with a traveling valve and an oil outlet valve, wherein the pump barrel is divided into an upper pump barrel 9 and a lower pump barrel 4 with different diameters, and the bottom of a pump cavity 11 of the upper pump barrel 9 is provided with an eccentric valve 5; the plunger is divided into an upper plunger 8 and a lower plunger 2, a hollow connecting rod 6 is arranged between the upper plunger 8 and the lower plunger 2, a flow divider 7 is arranged at the bottom of a chamber 12 of the upper plunger 8, and a lower chamber 13 of the plunger and a pump chamber 11 of an upper pump barrel 9 are respectively communicated with the upper chamber 12 of the upper plunger 8. The oil well layered oil extraction pump can adjust the discharge capacity and the pump-down depth of the two-stage pump according to different requirements of separate extraction, simultaneously extract different oil layers, realize the purpose of multilayer combined extraction, and has the advantages of simple structure, reliable operation and low manufacturing cost.

Description

Oil well layered oil recovery pump

The utility model relates to a crude oil underground mining tool, in particular to an oil well layered oil recovery pump.

As we all know, the extraction of crude oil requires the use of downhole oil well pumps. Traditional oil well pumps are single-stage pumps. One pump can only pump crude oil for a certain fixed oil layer, and it is impossible to realize the combined production of multiple oil layers with one pump. The use of traditional single-stage oil production pumps to exploit multiple oil layers requires multiple lifts and pumps, which increases the number of operations and increases the cost. Due to the different vertical reserves of the reservoir, large differences in interlayer pressure difference and permeability, and some oil and water in the same layer, there will be problems such as uneven vertical production of the reservoir, serious interlayer interference in multi-layer commingled production, and sudden increase in water cut.

The purpose of the utility model is to provide a layered oil recovery pump for oil wells against the disadvantages of single-stage oil production pumps, which can realize multi-layer combined production of crude oil by pumping it once.

In order to achieve the above object, the oil well layered oil production pump of the present utility model includes a pump barrel, a fixed valve, a hollow plunger with a swimming valve, and an oil outlet valve. The pump barrel is divided into an upper pump barrel and a lower pump barrel with different diameters. , the bottom of the pump chamber of the upper pump barrel is provided with an eccentric valve; the plunger is divided into an upper plunger and a lower plunger, and a hollow connecting rod is formed between the upper plunger and the lower plunger, and a shunt is set at the bottom of the chamber of the upper plunger The valve, the lower chamber of the plunger and the pump chamber (11) of the upper pump cylinder communicate with the upper chamber of the upper plunger respectively.

The oil well layered oil production pump of the utility model can adjust the displacement of the two-stage pump and the depth of the lower pump according to the different needs of separate production, and simultaneously exploit different oil layers to realize multi-layer combined production, reduce the number of operations and reduce the cost. The oil well layered oil recovery pump has the advantages of simple structure, convenient installation, reliable operation and low cost.

Below in conjunction with accompanying drawing, the utility model is further described.

Accompanying drawing 1 is the sectional view of the oil well layered oil production pump of the present utility model.

It can be seen from Fig. 1 that the oil well layered oil production pump pump barrel of the present utility model is divided into an upper pump barrel 9 and a lower pump barrel 4 with different diameters, the bottom of the lower pump barrel 4 is provided with a fixed valve 1, and the bottom of the upper pump barrel chamber 13 is provided with There is an eccentric valve 5. The plunger is installed in the pump barrel, and is divided into an upper plunger 8 and a lower plunger 2. There is a hollow connecting rod 6 between the upper plunger 8 and the lower plunger 2. The lower plunger cavity 15 is provided with an upper floating valve 3 and The downstream traveling valve 11 and the upper plunger cavity 14 are provided with a diverter valve 7 and an oil outlet valve 10 . The number of eccentric valves 5 can be 4 or 2, and in this embodiment, the number of eccentric valves 5 is 2.

Use the packer to divide the oil well vertically into two layers independent of each other, adjust the length of the upper pump barrel 9 and the lower pump barrel 4 according to the longitudinal distance between the two oil layers, and then lower the layered oil production pump. During the suction process, the plunger reciprocates up and down along with the sucker rod in the pump barrel. During the upstroke, the upstream traveling valve 3, the downstream traveling valve 11 and the diverter valve 7 are closed, the fixed valve 1 and the eccentric valve 5 are opened, and the plunger discharges the liquid from the upper part of the upper pump cylinder cavity 13 into the upper oil pipe of the pump. At the same time, The crude oil in the two oil layers respectively enters and fills the lower part of the lower pump barrel chamber 12 and the lower part of the upper pump barrel chamber 13; during the downstroke, the upstream traveling valve 3, the downstream traveling valve 11 and the diverter valve 7 are opened, and the fixed valve 1 and the eccentric valve 5 are opened. Close, the liquid in the lower pump barrel cavity 12 enters the upper pump barrel cavity 14 through the upper floating valve 3 and the lower floating valve 11; the liquid at the bottom of the upper pump barrel cavity 13 also enters the upper pump barrel cavity 14 through the diverter valve 7. The plunger continuously reciprocates up and down, and the well fluid is continuously sucked to the wellhead.

The layered oil recovery pump of the utility model is a two-layer layered oil recovery pump connected in series, and certainly can also be a three-layer layered oil recovery pump connected in series.

Claims (2)

1. oil well delamination oil extraction pump, comprise pump barrel, standing valve, have the hollow plunger and the outlet valve of traveling valve, it is characterized in that: described pump barrel is divided into different last pump barrel (9) of diameter and following pump barrel (4), and pump chamber (11) bottom of last pump barrel (9) is provided with eccentric valve (5); Described plunger is divided into upper plug (8) and lower plunger (2), be hollow connecting rod (6) between upper plug (8) and the lower plunger (2), the chamber (12) of upper plug (8) bottom is provided with diverter valve (7), the pump chamber (11) of plunger lower chambers (13) and last pump barrel (9) respectively and the upper chamber (12) of upper plug (8) be connected.

2. oil well delamination oil extraction pump as claimed in claim 1 is characterized in that: described eccentric valve (5) is two.