| Customization: | Available |
|---|---|
| After-sales Service: | 1year |
| Warranty: | 1year |
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To extract high viscosity crude oil from oil wells, our company has developed a special tubular pump - a series feedback pump. When the pump is used in oil wells with crude oil viscosity less than 4000mPa • s (50 ºC), it can be directly extracted. At the same time, when the viscosity of crude oil is high, measures such as steam injection, well flushing, or viscosity reduction can be taken without lifting the rod and pipe columns, and automatic oil discharge can also be achieved when the pump is started.
Structure and principle:
The pump is mainly composed of an upper pump barrel, an upper plunger, a lower pump barrel, a lower plunger, a center pipe, inlet and outlet valves, a pumping rod joint, and a pump barrel joint. The upper and lower plungers are connected by a central tube, and the upper and lower pump barrels are connected by pump barrel joints. The inlet and outlet valves are both installed in the plungers.
During the upward stroke, the oil outlet valve is closed, and the crude oil in the oil pipe above the upper plunger is discharged. The volume of the annular chamber between the upper and lower plungers increases, forming a low-pressure chamber. The inlet valve is opened, and the annular chamber is filled with oil; During the downward movement, the inlet valve closes, bearing the weight of the entire oil column and helping the sucker rod descend. The volume of the annular chamber decreases, forming a high-pressure chamber. The crude oil in the high-pressure annular chamber is pushed out of the oil valve and enters the oil pipe.
The pump is mainly driven by the pumping rod to move the upper and lower plungers, causing a change in the volume of the annular chamber and forming low and high pressure chambers respectively, which quickly opens or closes the inlet and outlet valves. During the downward movement, the weight of the oil column in the tubing is seated on the inlet valve, forming a hydraulic feedback force that helps the sucker rod descend. This not only solves the problem of difficult downward movement of the sucker rod in heavy oil wells, but also improves pump efficiency and overcomes the phenomenon of delayed closure of ball valves.
Technical performance table:
| Pump diameter specification |
25--175/125
|
25--225/150
|
30--275/150
|
30--275/175
|
|
| Nominal pump diameter (mm) |
44.5/31.8
|
57.2/38.1
|
69.9/38.1
|
69.9/44.5
|
|
| Piston length (m) | Upper plunger |
.6 (or 0.9, 1.2)
|
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| Lower plunger |
.6 (or 0.9, 1.2)
|
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| Pump barrel length (m) | 3~7 | ||||
| Pump constant (m3/d) | 1.09 | 2.05 | 3.88 | 3.28 | |
| Diameter of connecting sucker rod (mm) | 19 | 19 | 22 | 22 | |
| Connect the oil pipe thread |
2 7/8 TBG
|
2 7/8 TBG
|
3 1/2 TBG
|
3 1/2 TBG | |
| Maximum outer diameter (mm) | 92 | 92 | 114 | 114 | |
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