Elastic flushable pump lower screen pipe

Abstract

The utility model relates to the field of screen pipes, and discloses an elastic flushable pump lower screen pipe which comprises an outer pipe, two ends of the outer pipe are open, one end of the outer pipe is a liquid outlet, a Y-shaped liquid inlet pipe is fixedly arranged in the end, away from the liquid outlet, of the outer pipe, a supporting rod is fixedly arranged in the center of the interior of the outer pipe, and an adjuster is fixedly arranged on the supporting rod in a sleeved mode. Through the structural design of the adjustor and the filter unit, the filter precision can be adjusted according to the actual use working condition, the filter effect is improved, when the filter unit is blocked, high-pressure pulse liquid flow is injected into a casing pipe in an oil well through ground operation, and the oil well is prevented from being blocked. The filter unit is vibrated and cleaned without stopping production, the production interruption time is shortened, the sleeve is a layer of steel pipe outside the outer pipe of the screen pipe, an annular cavity is formed between the sleeve and the outer pipe, and high-pressure pulse is injected into the annular cavity to promote the screen pipe to vibrate, so that blockages are cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of screen pipe devices, in particular to an elastic flushable pump lower screen pipe. Background Art

[0002] Traditional screens are generally used at the lower end of oilfield pumps. Their main function is to filter liquids containing solid particles, playing an important filtering role in the oilfield production process. However, traditional screens have the following defects:

[0003] 1. The filtration accuracy is fixed and cannot be flexibly adjusted according to different working conditions, resulting in the inability to effectively filter out solid matter of the required particle size in actual operation;

[0004] 2. The filter unit is prone to clogging. Once clogged, production needs to be stopped for maintenance and cleaning, which affects production efficiency;

[0005] 3. Difficult to clean. Traditional screen tube cleaning usually requires disassembly and cleaning, which is time-consuming and labor-intensive. Utility Model Content

[0006] In order to solve the above-mentioned various problems, the utility model provides an elastic flushable pump bottom screen pipe.

[0007] In order to solve the above technical problems, the technical solution of the utility model is: an elastic flushable pump under-screen tube, comprising an outer tube, both ends of the outer tube are open and one end is a liquid outlet, a Y-shaped liquid inlet pipe is fixedly provided inside the end of the outer tube away from the liquid outlet, the two liquid inlets of the Y-shaped liquid inlet pipe pass through the side wall of the outer tube and are connected to the outside, a support rod is fixedly provided at the center of the inner part of the outer tube, one end of the support rod is welded and fixed to the Y-shaped liquid inlet pipe, a regulator is fixedly sleeved on the support rod, and an elastic filtering unit is sleeved on the support rod and located between the regulator and the Y-shaped liquid inlet pipe.

[0008] Furthermore, the regulator includes an adjusting screw fixedly mounted on the outside of the support rod, an adjusting nut is provided on the external threaded connection of the adjusting screw, a filter unit connector is movably connected on the inner side of the other end of the adjusting nut, the filter unit connector and the adjusting nut are detachably fixedly connected via a slide groove stud, and one end of the elastic filter unit is mounted on the other end of the regulator.

[0009] Furthermore, the elastic filtering unit adopts a spring.

[0010] Furthermore, a groove is provided inside one end of the adjusting nut close to the filter unit connector, and the filter unit connector is movably arranged inside the groove and is gap-matched with the inner wall of the groove.

[0011] Furthermore, one end of the filter unit connector connected to the elastic filter unit is integrally formed with a plurality of annular grooves for clamping the elastic filter unit.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. Adjustable filtration accuracy: Through the structural design of the regulator and the filter unit, the filtration accuracy can be adjusted according to the actual working conditions to improve the filtration effect.

[0014] 2. Easy and quick cleaning: When the filter unit is clogged, high-pressure pulse liquid flow is injected into the casing in the oil well through ground operations to vibrate and clean the filter unit. There is no need to stop production, thus reducing production interruption time. The casing is a layer of steel pipe outside the outer tube of the screen tube, which belongs to the structure of the oil well. An annular cavity is formed between the casing and the outer tube. High-pressure pulses injected into the annular cavity can cause the screen tube to vibrate, thereby clearing the blockage.

[0015] 3. Reduce maintenance costs: Compared with traditional screen tubes, the utility model saves time and labor costs for maintenance and cleaning, achieves the effect of non-stop cleaning, reduces production costs and increases production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of an elastic flushable pump lower screen pipe.

[0017] Figure 2 The utility model is a structural schematic diagram of a regulator of an elastic flushable pump lower screen pipe.

[0018] As shown in the figure: 1. Outer tube; 2. Y-shaped liquid inlet tube; 3. Support rod; 4. Liquid outlet; 5. Regulator; 6. Elastic filter unit; 7. Adjusting screw; 8. Adjusting nut; 9. Filter unit connector; 10. Slide stud; 11. Groove; 12. Ring groove. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", "center", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction structure and operation. Therefore, they should not be understood as limitations on the present invention.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "provided with", "installed", "connected", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] Combined with Figure 1 To Attachment Figure 2 A flexible flushable pump underscreen comprises an outer tube 1, both ends of the outer tube 1 are open and one end is a liquid outlet 4, a Y-shaped liquid inlet pipe 2 is fixedly arranged inside the end of the outer tube 1 away from the liquid outlet 4, and the two liquid inlets of the Y-shaped liquid inlet pipe 2 pass through the side wall of the outer tube 1 and are communicated with the outside, a support rod 3 is fixedly arranged at the center of the inner part of the outer tube 1, one end of the support rod 3 is welded and fixed to the Y-shaped liquid inlet pipe 2, a regulator 5 is fixedly sleeved on the support rod 3, an elastic filter unit 6 is sleeved on the support rod 3 and located between the regulator 5 and the Y-shaped liquid inlet pipe 2, and the elastic filter unit 6 adopts a spring.

[0023] The regulator 5 includes an adjusting screw 7 fixedly sleeved on the outside of the support rod 3, an adjusting nut 8 is threadedly connected to the outside of the adjusting screw 7, and a filter unit connector 9 is movably connected to the inside of the other end of the adjusting nut 8. The filter unit connector 9 and the adjusting nut 8 are detachably fixedly connected via a slide groove stud 10. One end of the elastic filter unit 6 is sleeved on the other end of the regulator 5, and a groove 11 is provided inside the end of the adjusting nut 8 close to the filter unit connector 9. The filter unit connector 9 is movably arranged inside the groove 11 and is gap-matched with the inner wall of the groove 11. The end of the filter unit connector 9 connected to the elastic filter unit 6 is integrally formed with a plurality of annular grooves 12 for clamping the elastic filter unit 6.

[0024] Specific implementation mode of the utility model: When the utility model is in use, the Y-shaped liquid inlet pipe 2 of the screen tube is placed downward into the oil well casing. When working, the liquid enters the spring from the Y-shaped liquid inlet pipe 2 and flows out through the gap of the spring, thereby filtering out large particles of impurities. The large particles of impurities are discharged from the lower end of the outer tube 1, and the filtered liquid is discharged upward from the liquid outlet 4. When it is necessary to adjust the filtering accuracy, it is only necessary to remove the slide groove stud and rotate the adjusting nut 8. The adjusting nut 8 moves along the adjusting screw 7 to release or compress the spring to achieve the purpose of adjusting the spring gap and then achieve the purpose of adjusting the filtering accuracy. After the adjustment is completed, the slide groove stud is screwed in to fix the filter unit connector 9. When it is necessary to clean the blockage of the spring, a high-pressure pulse liquid flow is injected into the casing in the oil well through ground operations to vibrate the spring filter unit and clean up the blocked particles. The casing is a layer of steel pipe outside the outer tube of the screen tube, which belongs to the structure of the oil well. An annular cavity is formed between the casing and the outer tube. The high-pressure pulse injected into the annular cavity can cause the screen tube to vibrate and then clean up the blockage.

[0025] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An elastic flushable pump screen, comprising an outer tube (1), the outer tube (1) being open at both ends and one end being a liquid outlet (4), characterized in that: A Y-shaped liquid inlet pipe (2) is fixedly provided inside one end of the outer tube (1) away from the liquid outlet (4); the two liquid inlets of the Y-shaped liquid inlet pipe (2) pass through the side wall of the outer tube (1) and are in communication with the outside; a support rod (3) is fixedly provided at the center of the inner part of the outer tube (1); one end of the support rod (3) is welded and fixed to the Y-shaped liquid inlet pipe (2); a regulator (5) is fixedly sleeved on the support rod (3); and an elastic filtering unit (6) is sleeved on the support rod (3) and located between the regulator (5) and the Y-shaped liquid inlet pipe (2).

2. The elastic flushable pump bottom screen according to claim 1, characterized in that: The regulator (5) comprises an adjusting screw (7) fixedly sleeved on the outside of the support rod (3); an adjusting nut (8) is provided on the outside of the adjusting screw (7) in threaded connection; a filter unit connector (9) is movably connected to the inside of the other end of the adjusting nut (8); the filter unit connector (9) and the adjusting nut (8) are detachably fixedly connected via a slide groove stud (10); and one end of the elastic filter unit (6) is sleeved on the other end of the regulator (5).

3. The elastic flushable pump bottom screen according to claim 1, characterized in that: The elastic filtering unit (6) adopts a spring.

4. The elastic flushable pump bottom screen according to claim 2, characterized in that: A groove (11) is provided inside one end of the adjusting nut (8) close to the filter unit connector (9); the filter unit connector (9) is movably arranged inside the groove (11) and is clearance-matched with the inner wall of the groove (11).

5. The elastic flushable pump bottom screen according to claim 4, characterized in that: The end of the filter unit connector (9) connected to the elastic filter unit (6) is integrally formed with a plurality of annular grooves (12) for clamping the elastic filter unit (6).

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