CN2708004Y - Throw-in type filling valve for oil well pump - Google Patents

Abstract

The utility model provides a throw-in type filling valve for oil well pump, comprising a valve cover, a valve ball, a valve seat, a sealed body, an o-shaped sealing ring, a bowl-shaped sealing ring, a regulating nut and an elastic locking pawl, and a pump barrel and a spacing connector are matched with the filling valve. The throw-in type filling valve for oil well pump adopts the o-shaped sealing ring, the bowl-shaped sealing, a cone, a pump barrel and the spacing connector, which are sealed with each others, and has high temperature resistance and high pressure resistance and reliable operation. The throw-in type filling valve for oil well pump can match the placing pipe column to finish the sand washing or orientation, perforation, detection and such, and realize the integration of sand washing placing pump and perforation placing pump.

Description

Submersible oil well pump inlet valve

technical field

The utility model is an oil pump inlet device for an oil production well in an oil field, especially a kind of oil pump inlet device that is put into the oil pump after the oil pump goes down the well first, cooperates with the pipe string to complete the sand washing or positioning, perforation, and pressure measurement procedures. oil valve.

Background technique

At present, the oil inlet valve of the known oil well pump is connected to the lower end of the oil well pump barrel, and is lowered into the well together with the oil well pump. The surface liquid cannot reach the bottom of the pump through the pump and the oil inlet valve, and the test instrument and ignition iron rod cannot pass through the pump and the oil inlet valve to complete the positioning, perforation and testing of the pump.

Contents of the invention

In order to overcome the disadvantages that the existing oil pump inlet valve cannot pass liquid downwards, test instruments and perforating iron rods, the utility model provides a drop-in type oil inlet valve for the oil pump. The oil inlet valve is used in conjunction with the oil well pump, and the oil well pump is first lowered into the well together with the pipe string. After sand washing or positioning, perforation, testing and other processes are completed, the oil inlet valve is put into the oil well pump to achieve sand washing first. Or the purpose of positioning, perforating, testing, and then moving the string to complete well production.

The technical scheme adopted by the utility model to solve the technical problem is: a limit joint is installed at the lower end of the pump barrel, and the pump barrel and the limit joint are lowered into the well along with the operation string. The valve cover, valve ball, valve seat, sealing body, "O"-shaped sealing ring, bowl-shaped sealing ring, adjusting nut, and elastic locking claw are connected sequentially from top to bottom to form the oil inlet valve body. The oil inlet valve body is put into the oil well pump after the pipe string lowered into the well completes sand washing or positioning, perforating, testing and other processes. The oil inlet valve body is sealed with the pump cylinder and the limit joint through the "O"-shaped seal ring, the bowl-shaped seal ring, and the tapered surface of the elastic lock claw, and is fixed on the limit joint by the elastic lock claw.

The beneficial effect of the utility model is that during the construction operation of the pumping well, multiple processes can be completed in the next trip of the pipe string, which reduces the time taken up and down the pipe string, saves labor and material costs, and ensures the safety of the operation and construction .

Description of drawings

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

Fig. 1 is a longitudinal sectional structure diagram of an embodiment of an oil inlet valve of an input well pump

In the figure 1. pump barrel, 2. valve cover, 3. valve ball, 4. valve seat, 5. sealing body, 6. "O"-shaped sealing ring, 7. bowl-shaped sealing ring, 8. adjusting nut, 9. Elastic locking pawl, 10. limit joint.

Detailed ways

In the embodiment shown in Fig. 1, the limit joint (10) is threadedly connected with the pump barrel (1), and then it is lowered into the well along with the suspension barrel and the tubing. After the valve ball (3) is loaded into the valve cover (2), the valve seat (4) is packed into, and the short threaded end of the sealing body (5) is screwed into the valve cover (2). After the long threaded end of the sealing body (5) is loaded onto the bowl-shaped sealing ring (7), screw in the adjusting nut (8), then load onto the elastic locking pawl (9) with threaded connection. Finally, install an "O"-shaped sealing ring (6) in the sealing groove of the sealing body (5). After the tubing string running into the well completes sand washing or positioning, perforating, and testing procedures, put the valve cover (2) on top and the elastic locking claw (9) on the bottom, and put them into the tubing to connect them with the sealing body (5). Inlet valve body. Then lower the oil well pump plunger, press the oil inlet valve body into the pump barrel (1) and position and lock on the limit body (10).

Claims (3)

1. An oil inlet valve of a drop-in oil pump, in the pump barrel (1) and the limit joint (10), the valve cover (2), valve ball (3), valve seat (4), sealing body (5) , "O"-shaped sealing ring (6), bowl-shaped sealing ring (7), adjusting nut (8), and elastic locking claw (9) are connected sequentially from top to bottom to form an oil inlet valve body, which is characterized by: A valve cover (2) with a valve ball (3) and a valve seat (4) is connected to the short threaded end of the sealing body (5); an "O"-shaped seal is installed in the annular groove on the outer surface of the sealing body (5). ring (6), and the end of the long thread button of the sealing body (5) is equipped with a bowl-shaped sealing ring (7), an adjusting nut (8) and an elastic locking claw (9); the oil inlet valve body passes through the "O"-shaped sealing ring (6) and bowl-shaped sealing ring (7) are sealed with the pump cylinder (1); The surface is matched with each other, and the shoulder on the elastic locking pawl (9) is embedded in the annular groove on the inner hole of the limit joint (10). threaded connection. 2. The oil inlet valve of the submersible oil well pump according to claim 1, characterized in that: the elastic lock claw (9) has a through hole in the center, one end of the surface is cylindrical, processed with internal threads, and the other end is a plurality of blades. Shaped split petal, with a shoulder on the split petal surface, one end of the split petal is connected to the cylindrical end, and the other end of the split petal is not connected to each other. 3. The oil inlet valve of the throw-in type oil well pump according to claim 1, characterized in that: the limit joint (10) is a garden-shaped column on the surface, with a through hole in the center, and one end of the through hole is processed with an internal thread and a sealing limit. Bit cone surface, there is an annular groove in the middle of the through hole, and the other end of the through hole is a trumpet-shaped opening.

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