A tube pump under jet booster

Abstract

The application relates to a tubular pump lower jet flow intensifier, which comprises a throat pipe, the upper part of the throat pipe is inserted in the middle part of a throat pipe frame through threads, and the throat pipe frame buckle is arranged on the inner side of a special coupling; a multi-flow large plunger skeleton is provided with a nozzle at the upper end, a drainage plug is arranged at the inner lower end of the multi-flow large plunger skeleton, and a slide valve sleeve is fixedly connected to the outer lower end of the multi-flow large plunger skeleton. The device provided by the application effectively utilizes the elastic expansion of the oil pipe, converts the elastic expansion energy of the oil pipe to the pump cylinder, and forms compression and pressure increase on the formation liquid in the energy storage liquid cavity by the pump cylinder and the plunger. The pressurized formation liquid generates jet flow through the upper nozzle, the jet flow liquid generates negative pressure through the throat pipe inlet, and the high-speed formation liquid column gathered together flows out of the throat pipe, the flow speed into the pump cylinder is increased, and the pump filling speed is accelerated.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of oil production processes, and in particular to a jet flow enhancer under a tubular pump. BACKGROUND

[0002] The pump efficiency of a pumping unit well is less than 60%, and the parallel system efficiency is about 30%. There are many reasons affecting the pump efficiency. The pump cannot be filled, which is a direct reason. In order to improve the pump efficiency, the filling capacity of the pump needs to be increased. The existing rod pump oil production efficiency increasing measures in China include oil pipe anchoring technology, oil pipe compensation technology, sucker rod compensation technology and the like. The above technical research is started from reducing the elastic expansion of the oil pipe and the pump rod, the purpose of increasing the efficiency can be achieved, but problems such as damaging the casing (affecting the service life) and inaccurate test dynamometer diagram are caused, therefore, the jet flow enhancer under the tubular pump is provided. SUMMARY

[0003] The application provides a jet flow enhancer under a tubular pump to solve the problems in the background art.

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the application provides a jet flow enhancer under a tubular pump, which comprises:

[0005] A throat pipe is threadedly inserted into the middle part of a throat pipe frame, and a throat pipe frame buckle is arranged on the inner side of a special coupling;

[0006] A multi-channel large plunger skeleton is connected with a nozzle at the upper end, is provided with a flow guide plug at the inner lower end, is fixedly connected with a slide valve sleeve at the lower outer side, and is sealingly arranged in the upper part of the inner cavity of an outer large pump cylinder through a plunger metal sealing ring at the outer upper part;

[0007] The throat pipe is located on the upper side of the nozzle.

[0008] Optionally, a plurality of liquid outlet holes are uniformly distributed radially at the outer light pipe reduced diameter lower point of the multi-channel large plunger skeleton.

[0009] Optionally, a polytetrafluoroethylene sealing ring is arranged at the lower part of the outer side of the multi-channel large plunger skeleton, and the polytetrafluoroethylene sealing ring and the upper section of the slide valve sleeve are matched to sealingly close the liquid outlet holes uniformly distributed radially at the outer light pipe reduced diameter lower point of the multi-channel large plunger skeleton.

[0010] Optionally, the slide valve sleeve is connected with a small plunger through a limiting pin.

[0011] Optionally, a first spring seat and a second spring seat are arranged at the right outer side of the central pipe and the right side of the piston respectively, and a spring is clamped between the first spring seat and the second spring seat.

[0012] Optionally, the upper part of the inner diameter of the throat pipe is a high-finish circular passageway, and the lower part of the inner diameter of the throat pipe is a gradually expanding trumpet mouth.

[0013] Optionally, the upper part of the outer side of the drainage plug is provided with a thread, and the lower end of the drainage plug is conical.

[0014] Optionally, the nozzle is a high-finish circular passageway with an upper part of the inner diameter being a high-finish circular passageway and a lower part being a gradually expanding trumpet mouth high-finish circular passageway.

[0015] Optionally, the upper part of the outer side of the outer large pump cylinder is sleeved with a special coupling through a thread, and the lower part of the outer side of the outer large pump cylinder is sleeved with a variable buckle joint through a thread.

[0016] Optionally, the inner side of the variable buckle joint is sleeved with a small pump cylinder through a thread, and the lower part of the outer side of the small pump cylinder is fixedly sleeved with a lower joint.

[0017] Optionally, the upper part of the outer side of the multi-flow-channel large plunger skeleton is provided with a circular groove.

[0018] Compared with the prior art, the above technical solutions provided by the embodiments of the present application have the following advantages:

[0019] The device provided by the embodiments of the present application effectively utilizes the elastic expansion of the oil pipe, converts the elastic expansion energy of the oil pipe to the pump cylinder, forms compression and pressure increase on the formation liquid in the energy storage liquid cavity by the pump cylinder and the plunger, generates a jet flow through the upper nozzle after the formation liquid is pressurized, generates negative pressure again through the throat pipe inlet, and then passes the formation liquid around at a high speed through the throat pipe. The formation liquid column flowing out of the throat pipe at a high speed and converging improves the flow rate into the pump cylinder, speeds up the pump filling speed, and achieves the purpose of high pump efficiency. The device plays a better role in improving the pump efficiency, increasing the single-well production, and improving the system efficiency of the oil field. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0022] Figure 1 It is a cross-sectional view of a tubular pump lower jet flow efficiency enhancer.

[0023] In the figure: 1, special coupling; 2, throat pipe frame; 3, throat pipe; 4, outer large pump cylinder; 5, nozzle; 6, multi-channel large plunger skeleton; 7, plunger metal sealing ring; 8, polytetrafluoroethylene sealing ring; 9, drainage plug; 10, slide valve sleeve; 11, limit pin; 12, small plunger; 13, variable buckle joint; 14, small pump cylinder; 15, lower joint. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0025] Various embodiments of the present application can exist in the form of a range. It should be understood that the description in the form of a range is merely for the convenience and brevity, and should not be understood as a hard limitation on the scope of the present application; therefore, it should be considered that the described range has specifically disclosed all possible sub-ranges and single values in the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers in the described range, such as 1, 2, 3, 4, 5 and 6, which is applicable to any range. In addition, whenever a numerical range is indicated in the present application, it refers to any cited number (fraction or integer) in the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application can be purchased from the market or can be prepared by existing methods.

[0026] In the present application, the orientation words such as "upper" and "lower" are specifically the directions of the drawing surface in the drawings unless otherwise stated. In addition, in the present application, the terms "include", "contain" and the like mean "include but not limited to". In the present application, the relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. In the present application, "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the cases of A alone, A and B together, and B alone. Wherein A and B can be singular or plural. In the present application, "at least one" means one or more, and "multiple" means two or more. "At least one", "at least one of the following" or the like means any combination of the items, including any combination of single or multiple items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can represent a, b, c, a-b (a and b), a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0027] As shown in Figure 1 The embodiment of the present application provides a pipe pump lower jet booster, which comprises:

[0028] A throat pipe 3 is threadedly inserted into the middle part of a throat pipe frame 2, and the throat pipe frame 2 is clamped on the inner side of a special coupling 1.

[0029] A multi-channel large plunger skeleton 6 is connected with a nozzle 5 at the upper end, is provided with a flow guide plug 9 at the inner lower end, is fixedly connected with a slide valve sleeve 10 at the lower outer side, and is sealingly arranged at the upper part of the inner cavity of an outer large pump cylinder 4 through a plunger metal sealing ring 7 at the outer upper part.

[0030] The throat pipe 3 is located on the upper side of the nozzle 5.

[0031] Specifically, the special coupling 1 is designed for connecting the lower inlet of the pump, the upper part is a φ89.5mm light pipe, the inner diameter is a standard φ73mm flat oil pipe box, the lower part is an expanded diameter light pipe, the inner diameter is a common m100x2 box, and the inner diameter middle part is provided with a common pipe box.

[0032] The throat bracket 2 is a common male pipe thread with an outer diameter that matches the middle of the inner diameter of the special coupling 1 and a common female pipe thread. The inner diameter has a common female pipe thread for fixing the throat 3. A short coupling with a buckle has a liquid passage hole milled between the outer diameter and the inner diameter. The throat bracket 2 is designed to connect the special coupling 1, support and fix the inner diameter throat 3, and allow axial liquid passage.

[0033] The outer large pump cylinder 4 is connected to a special coupling 1 on the top and a variable thread joint 13 on the bottom. It has a thick wall, ordinary pipe male threads at both ends, and a high-gloss round diameter inner diameter.

[0034] The plunger metal sealing ring 7 is designed for sealing the inner diameter of the multi-channel large plunger skeleton 6 and the outer large pump barrel 4. It is an internal sliding sealing ring made of metal with high hardness and elasticity.

[0035] The spool sleeve 10 is designed to be combined with the reduced-diameter outer tube at the bottom of the multi-channel large plunger skeleton 6, the PTFE sealing ring 8, and the limit pin 11 to form a sliding switch valve. The upper radial end face and inner diameter of the spool sleeve 10 are high-gloss surfaces, the lower end of the outer diameter is a thickened round concave radial end face, and the upper 3 / 4 part is the reduced-diameter section of the outer tube.

[0036] like Figure 1 As shown: Several liquid outlet holes are radially evenly distributed at the lower point of the outer tube of the multi-channel large plunger skeleton 6.

[0037] The lower outer side of the multi-channel large plunger skeleton 6 is provided with a polytetrafluoroethylene sealing ring 8. The polytetrafluoroethylene sealing ring 8 is matched with the upper section of the slide valve sleeve 10 to seal and close the outlet holes that are radially evenly distributed at the lower point of the outer diameter reduction of the multi-channel large plunger skeleton 6.

[0038] Specifically: The multi-channel large plunger skeleton 6 has a common female thread connecting, fixing, and limiting the lower half of the outer diameter of the nozzle 5 in the upper 1 / 5 of its inner diameter. The lower 3 / 5 of the inner diameter is a gradually expanding flared mouth. The lower end of the flared mouth has two parallel axial sections and three sets of evenly distributed liquid inlet holes on its outer diameter. The next lower 1 / 5 is a common female thread connecting to the upper part of the drain plug 9. The upper 1 / 3 of the outer diameter has three evenly distributed grooves for installing plunger metal sealing rings 7. After the lower end narrows, it becomes a through-bore tube. The shoulder of the narrowed tube has a groove for installing PTFE sealing rings 8. The lower part of the outer tube has evenly distributed outlet holes on its radial side. The outer diameter of the outer tube is a common male thread connecting to the small plunger 12. A cross-flow channel is milled between the outer diameter and the inner diameter, avoiding the three sets of evenly distributed liquid inlet holes on the outer diameter.

[0039] The polytetrafluoroethylene (PTFE) sealing ring 8 is a dovetail-shaped sealing ring made of PTFE material. The PTFE sealing ring 8 is matched with the upper section of the slide valve sleeve 10 to seal and close, and the liquid outlet holes are radially evenly distributed at the lower point of the outer tube of the multi-channel large plunger skeleton 6.

[0040] like Figure 1As shown: the slide valve sleeve 10 is connected to the small plunger 12 by the limiting pin 11.

[0041] Specifically: the limiting pin 11 is a symmetrical riveting pin designed for the sliding distance of the slide valve sleeve 10, which is riveted on the outer diameter of the upper end of the small plunger 12. The small plunger 12 has a common pipe male thread on the inner diameter of the upper end, which is connected to the lower part of the inner light pipe of the multi-channel large plunger skeleton 6, and a common pipe female thread on the lower end, which is connected to the upper end of the lower joint 15. The other parts are uniform inner diameter tubes, and the outer diameter is constant from top to bottom.

[0042] As shown: Figure 1 The upper part of the inner diameter of the throat pipe 3 is a high finish circular through diameter, and the lower part of the inner diameter of the throat pipe 3 is a gradually expanding trumpet mouth.

[0043] Specifically: the throat pipe 3 is designed to contract, suck, and collect surrounding liquid, which is fixed on the inner diameter thread of the throat pipe frame 2 by a thread. The upper 1 / 3 part of the inner diameter is a high finish circular through diameter, and the lower 2 / 3 part of the inner diameter is a gradually expanding trumpet mouth. The upper 1 / 3 part of the outer diameter is provided with a common pipe male thread connected and fixed to the inner diameter of the throat pipe frame 2, and the lower 2 / 3 part of the inner diameter is a gradually expanding trumpet mouth with a certain thickness.

[0044] As shown: Figure 1 The outer side of the upper part of the drainage plug 9 is provided with a thread, and the lower end of the drainage plug 9 is conical.

[0045] Specifically: the drainage plug 9 is designed to guide the flow of formation fluid in the small plunger 12 to pass through the vertical liquid passage milled between the outer diameter and the inner diameter of the multi-channel large plunger skeleton 6, which has three groups of evenly distributed liquid inlet through holes, to reduce the flow resistance. The upper half of the outer diameter of the drainage plug 9 is provided with a common pipe male thread matched with the common pipe female thread of the lower 1 / 5 part of the inner diameter of the multi-channel large plunger skeleton 6, and the lower half is a sharp cone. The inner diameter is a solid plug.

[0046] As shown: Figure 1 The nozzle 5 is a high finish circular through diameter in the upper part of the inner diameter, and a gradually expanding trumpet mouth high finish circular through diameter in the lower part.

[0047] Specifically: the nozzle 5 is a high finish circular through diameter in the upper 1 / 2 part of the inner diameter, and a gradually expanding trumpet mouth high finish circular through diameter in the lower 1 / 2 part. The upper 1 / 2 part of the outer diameter is a circular cone with a certain taper, and the lower 1 / 2 part is a common pipe male thread connected to the upper inner diameter of the multi-channel large plunger skeleton 6. It is designed for high pressure liquid collection, speed-up, and injection.

[0048] As shown: Figure 1As shown: the outer side of the upper part of the outer large pump barrel 4 is threaded into the special coupling 1, and the outer side of the lower part of the outer large pump barrel 4 is threaded into the variable buckle joint 13.

[0049] Specifically: the variable buckle joint 13 is designed for connecting the outer large pump barrel 4 to the small pump barrel 14, and has a common pipe box on the inner diameter of the upper end for connecting the lower end of the outer large pump barrel 4, and a common pipe box on the inner diameter of the lower end for connecting the upper end of the small pump barrel 14, and a variable diameter through hole between the two openings. The outer diameter is a large and small smooth pipe, and the middle part is a reduced diameter transition section;

[0050] As shown: Figure 1 The inner side of the variable buckle joint 13 is threaded into the small pump barrel 14, and the outer side of the lower part of the small pump barrel 14 is fixedly sleeved with the lower joint 15.

[0051] Specifically: the small pump barrel 14 is a thick-walled pump barrel pipe with a high smoothness circular bore on the inner diameter, and a common pipe pin on the outer diameter of the upper end for connecting the lower end of the variable buckle joint 13, and the rest is an equal diameter smooth pipe, which is designed for sliding sealing on the small plunger 12;

[0052] The lower joint 15 is designed for connecting the small plunger 12 to the matching tool, and the lower joint 15 is also the only inlet of the formation fluid. The lower joint 15 has a common pipe box on the inner diameter of the upper end for connecting the lower end of the small plunger 12, and a smooth pipe on the inner diameter of the lower end. The upper end is a smooth pipe box, the middle part is a reduced diameter transition section, and the lower end is provided with a standard φ73mm flat type tubing buckle after being reduced in diameter.

[0053] As shown: Figure 1 The outer side of the upper part of the multi-flow channel large plunger skeleton 6 is provided with a circular ring groove.

[0054] Specifically: the circular ring groove is used for installing the plunger metal sealing ring 7.

[0055] When the device is used, the lower end of the device is connected to the tubing anchor on the ground, the upper end is connected to the lower end liquid inlet of the pipe type oil pump, and the whole lifting string is lowered into the well according to the design, and the construction is completed after the tubing anchor in the well is anchored with the oil well casing anchor. When the horse head of the ground oil pumping machine drives the sucker rod to go down, the sucker rod connected to the downhole oil pump plunger goes down to pressurize the liquid in the pump cavity. When the liquid pressure in the pump cavity is higher than the pressure in the whole lifting string, the plunger float valve opens, and at this time the liquid column pressure in the whole lifting string directly acts on the lower end fixed valve seat of the oil pump;

[0056] The whole structure is to utilize the telescopic inertia force of the lifting pipe column (tubing) to provide energy for the jet flow device under the tubular pump without increasing external force and without consuming the energy of the well equipment, the jet flow device is provided with a flow gathering and rectifying shape, the thrust on the suction valve of the oil pump is increased, the fixed suction valve under the pump is forced to open immediately when the plunger goes up, and liquid is sucked in. When the liquid is sucked in, the flow gathering and rectifying shape and the speed increasing are realized through the throat pipe 3, the flow rate into the pump cylinder is increased, the pump filling speed is accelerated, and the purpose of high pump efficiency is realized, which plays a better role in improving the pump efficiency, increasing the single well yield and improving the system efficiency.

[0057] Embodiment:

[0058] In the research of the present application, the elastic telescopic energy of the tubing is effectively utilized, the elastic telescopic energy of the tubing is transferred to the pump cylinder, the formation liquid in the energy storage liquid cavity is compressed and pressurized by the pump cylinder and the plunger, the pressurized formation liquid generates jet flow through the upper nozzle 5, the jet flow liquid generates negative pressure through the inlet of the throat pipe 3, and the surrounding formation liquid is sucked at high speed through the throat pipe 3, the high-speed and converging formation liquid column flows out of the throat pipe 3 and further carries the surrounding formation liquid to rush to the ball of the bottom valve of the tubular pump, and the bottom valve is forced to open quickly to suck in liquid. This process makes the bottom valve of the tubular pump open quickly, the liquid suction speed is fast, the pump cylinder filling coefficient is high, and it is a good device for realizing high pump efficiency and increasing the daily liquid yield of the single well. The research and development provides a new auxiliary pumping and lifting and efficiency increasing device for conventional rod pumping, especially for deep pumping, and provides a new technology for improving the yield, pump efficiency and system efficiency of the oil well.

[0059] In the prior art, the closest device to the present application is found, invention 1 is a matching high-pressure gas well increasing device, needs high-pressure gas of adjacent well, and the condition limitation causes that it cannot be popularized on a large scale; invention 2 is a dosing device for high gas content well, and there is no comparability with the device; invention 3 is a modification to the pump itself, the pump structure is complex and prone to jamming and leakage, and the present application fully utilizes the elastic telescopic energy of the pipe column, and there is no comparability with the device, and the novelty and creativity of the present application are not substantially affected. The comparative analysis is as follows:

[0060] 1. Chinese invention patent “deep water oilfield mud line wellhead introduces adjacent well high-pressure gas liquid jet pressurization oil production method and device”

[0061] (CN103032054B). The patent is to convert the fluid pressure energy of the high-pressure gas well into the power of the low-pressure oil well at the sea bottom to realize primary pressurization, thereby greatly reducing the oil pressure of the low-pressure oil well at the sea bottom, prolonging the self-flowing period and improving the self-flowing recovery rate. The patent needs to be matched with a high-pressure gas well, and the condition limitation causes that it cannot be popularized and applied.

[0062] 2. Chinese invention patent "A kind of oil well pressure increasing gas collection and integrated device of dosing" (CN110593821A). The oil itself pressure in the oil pipe is used to compress the gas cavity, to increase the pressure of natural gas, and to meet the requirements of high pipe natural gas pressure increasing and dosing. This patent is a pressure increasing and dosing device for high gas content wells, and has no relevance to this patent.

[0063] 3. Chinese invention patent "Pressure increasing lifting pipe string" (CN116163686A). The lifting pipe string body includes a pump upper chamber and a pump lower chamber. Part of the liquid in the pump upper chamber of the pressure increasing lifting pipe string will be transported to the jet assembly through the pipeline, and the liquid will be pressurized by the jet assembly. The pressurized liquid is mixed with the bottom hole fluid force and enters the pump lower chamber. The pump structure is modified, and the application conditions (depth, inclination, etc.) of the pump are limited. The pump structure is prone to problems such as jamming and leakage after modification.

[0064] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features claimed in the present application.

Claims

1. A tubular pump underjet enhancer, characterized in that, include: The upper part of the throat tube (3) is threadedly inserted into the middle part of the throat tube frame (2), and the throat tube frame (2) is snapped on the inside of the special coupling (1); A multi-channel large plunger skeleton (6) is provided with a nozzle (5) connected to the upper end of the multi-channel large plunger skeleton (6), a flow-guiding plug (9) is provided on the lower inner side of the multi-channel large plunger skeleton (6), a slide valve sleeve (10) is fixedly connected to the outer side of the lower end of the multi-channel large plunger skeleton (6), and the upper outer side of the multi-channel large plunger skeleton (6) is sealed in the upper inner cavity of the outer large pump cylinder (4) by a plunger metal sealing ring (7); the wall of the multi-channel large plunger skeleton (6) is provided with a vertically intersecting liquid passage that runs through the upper and lower parts, and a liquid inlet hole that communicates with the vertically intersecting liquid passage is radially evenly distributed on the lower outer side of the outer tube with a reduced diameter section, and a liquid outlet hole is radially evenly distributed on the outer tube below the polytetrafluoroethylene sealing ring (8); The throat (3) is located above the nozzle (5).

2. The tubular pump downjet enhancer according to claim 1, characterized in that: The multi-channel large plunger skeleton (6) has several outlet holes radially distributed at the lower point of the outer tube diameter reduction.

3. The tubular pump downjet enhancer according to claim 1, characterized in that: The lower outer side of the multi-channel large plunger skeleton (6) is provided with a polytetrafluoroethylene sealing ring (8). The polytetrafluoroethylene sealing ring (8) is matched with the upper section of the slide valve sleeve (10) to seal and close the outlet holes that are radially evenly distributed at the lower point of the outer tube of the multi-channel large plunger skeleton (6).

4. The tubular pump downjet enhancer according to claim 1, characterized in that: The slide valve sleeve (10) is connected to the small plunger (12) via a limiting pin (11).

5. The tubular pump downjet enhancer according to claim 1, characterized in that: The upper part of the inner diameter of the throat tube (3) is a high-gloss round diameter, and the lower part of the inner diameter of the throat tube (3) is a gradually expanding flared mouth.

6. The tubular pump downjet enhancer according to claim 1, characterized in that: The upper outer part of the drain plug (9) is threaded, and the lower end of the drain plug (9) is conical.

7. The tubular pump downjet enhancer according to claim 1, characterized in that: The nozzle (5) is a high-gloss round tube with an upper inner diameter and a gradually expanding flared mouth with a high-gloss round tube.

8. The tubular pump downjet enhancer according to claim 1, characterized in that: The outer upper part of the outer large pump cylinder (4) is connected to a special coupling (1) by a threaded sleeve, and the outer lower part of the outer large pump cylinder (4) is connected to a variable thread joint (13) by a threaded sleeve.

9. The tubular pump downjet enhancer according to claim 8, characterized in that: The inner side of the variable-thread connector (13) is threaded into the small pump cylinder (14), and the lower part of the outer side of the small pump cylinder (14) is fixedly sleeved with the lower connector (15).

10. The tubular pump downjet enhancer according to claim 1, characterized in that: The upper outer side of the multi-channel large plunger skeleton (6) has a circular groove.

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