Tubular pump lower jet flow multiplier

Abstract

The invention relates to a tubular pump lower jet flow multiplier which comprises a throat pipe, the upper portion of the throat pipe is inserted into the middle of a throat pipe frame through threads, and the throat pipe frame is arranged on the inner side of a special coupling in a buckled mode; the upper end of the multi-flow-channel large plunger framework is connected with a nozzle, the lower end of the inner side of the multi-flow-channel large plunger framework is provided with a drainage plug, and the outer side of the lower end of the multi-flow-channel large plunger framework is fixedly connected with a sliding valve sleeve. According to the equipment provided by the embodiment of the invention, elastic expansion and contraction of the oil pipe are effectively utilized, elastic expansion and contraction energy of the oil pipe is transferred to the pump cylinder, formation liquid in the energy storage liquid cavity is compressed and pressurized through the pump cylinder and the plunger, and the pressurized formation liquid generates jet flow through the upper nozzle; jet liquid generates negative pressure again through an inlet of the throat pipe to draw surrounding stratum liquid to pass through the throat pipe at high speed, and a high-speed converged stratum liquid column flows out of the throat pipe, so that the flow speed of a pump cylinder is increased, and the pump filling speed is increased.

Description

Technical Field

[0001] The present application relates to the technical field of oil production technology, and in particular to a tubular pump downjet enhancer. Background Art

[0002] The pump efficiency of the pumping well is less than 60%, and the efficiency of the parallel system is about 30%. There are many reasons that affect the pump efficiency. The inability to fill the pump is the direct reason. In order to improve the pump efficiency, it is necessary to increase the filling capacity of the pump. The existing domestic measures to increase the efficiency of rod pump oil production include tubing anchoring technology, tubing compensation technology, and sucker rod compensation technology. The above technical research is based on reducing the elastic expansion and contraction of the tubing and pump rod, which can achieve the purpose of efficiency improvement, but it also brings problems such as damage to the casing (affecting the service life) and inaccurate dynamometer diagrams. Therefore, we proposed a tubular pump down jet enhancer. Summary of the invention

[0003] The present application provides a tubular pump underjet amplifier to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a tubular pump underjet enhancer, comprising:

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

[0006] A multi-channel large plunger frame, wherein the upper end of the multi-channel large plunger frame is connected to a nozzle, the inner lower end of the multi-channel large plunger frame is provided with a drainage plug, the outer side of the lower end of the multi-channel large plunger frame is fixed with a sliding valve sleeve, and the outer upper part of the multi-channel large plunger frame is sealed on the upper part of the inner cavity of the outer large pump barrel through a plunger metal sealing ring;

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

[0008] Optionally, the flow channel large plunger skeleton has a plurality of liquid outlet holes evenly distributed radially at the lower point where the outer light tube is reduced in diameter.

[0009] Optionally, a polytetrafluoroethylene sealing ring is provided at the lower outer side of the multi-channel large plunger skeleton, and the polytetrafluoroethylene sealing ring is matched with the upper section of the sliding valve sleeve to seal and close the radially evenly distributed liquid outlet holes at the lower point of the reduced diameter of the multiple outer light tubes of the channel large plunger skeleton.

[0010] Optionally, the sliding valve sleeve is connected to a small plunger via a limit pin.

[0011] Optionally, a first spring seat and a second spring seat are respectively provided on the right side of the outer portion of the central tube and the right side of the piston, and the spring is clamped between the first spring seat and the second spring seat.

[0012] Optionally, the upper inner diameter portion of the throat is a high-finish round diameter, and the lower inner diameter portion of the throat is a gradually expanding bell mouth.

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

[0014] Optionally, the nozzle is a circular diameter with a high-finish upper inner diameter portion, and the lower inner diameter portion of the nozzle is a gradually expanding flared circular diameter with a high-finish lower inner diameter portion.

[0015] Optionally, the upper outer portion of the outer large pump barrel is threadedly connected to a special coupling, and the lower outer portion of the outer large pump barrel is threadedly connected to a variable joint.

[0016] Optionally, the inner side of the variable buckle joint is threadedly inserted into a small pump barrel, and the lower outer side of the small pump barrel is fixedly sleeved with a lower joint.

[0017] Optionally, a circular groove is formed on the upper outer side of the multi-channel large plunger skeleton.

[0018] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0019] The device provided in the embodiment of the present application effectively utilizes the elastic expansion and contraction of the oil pipe, transfers the elastic expansion and contraction energy of the oil pipe to the pump barrel, and compresses and pressurizes the formation liquid in the energy storage liquid chamber by the pump barrel and the plunger. The pressurized formation fluid generates a jet through the upper nozzle, and the jet liquid generates negative pressure through the throat inlet to draw the surrounding formation fluid through the throat at high speed. The high-speed, converged formation fluid column flows out of the throat, thereby increasing the flow rate into the pump barrel, accelerating the pump filling speed, and achieving the purpose of high pump efficiency, thereby playing a better role in improving pump efficiency, increasing single well production, and improving system efficiency in oil fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 A cross-sectional view of a tubular pump downjet enhancer.

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

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] Various embodiments of the present application may exist in the form of a range. It should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a hard limit to the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single values ​​within 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., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which are applicable regardless of the range. In addition, whenever a numerical range is indicated in the present application, it is meant to include any quoted numbers (fractions or integers) within the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application, etc., can be purchased from the market or can be prepared by existing methods.

[0026] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the present application, the terms "include", "comprise", etc. refer to "including but not limited to". In the present application, 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 these entities or operations. In the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In the present application, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular items or plural items. For example, "at least one of a, b, or c" or "at least one of a, b and c" can both mean: a, b, c, ab, i.e. a and b, ac, bc or abc, where a, b, c can be single or plural, respectively.

[0027] like Figure 1 As shown, the embodiment of the present application provides a tubular pump down jet enhancer, comprising:

[0028] A throat pipe 3, the upper part of which is inserted into the middle part of a throat pipe frame 2 by means of a thread, and the throat pipe frame 2 is buckled and arranged on the inner side of a special coupling 1;

[0029] A multi-channel large plunger skeleton 6, the upper end of which is connected to a nozzle 5, a drainage plug 9 is provided at the inner lower end of the multi-channel large plunger skeleton 6, a sliding 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 part of the multi-channel large plunger skeleton 6 is sealed and arranged on the upper part of the inner cavity of the outer large pump barrel 4 through a plunger metal sealing ring 7;

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

[0031] Specifically: Special coupling 1 is designed for connecting the lower inlet of the pump. The upper part is a smooth tube with an outer diameter of φ89.5mm and an inner diameter of a standard φ73mm flat oil pipe female buckle. The lower part has an expanded outer diameter smooth tube and an inner diameter of a common m100x2 female buckle. A common pipe female buckle is provided in the middle of the inner diameter.

[0032] The throat pipe rack 2 is a common pipe male buckle whose outer diameter matches the common pipe female buckle in the middle of the inner diameter of the special coupling 1, and the inner diameter is provided with a common pipe female buckle for fixing the throat pipe 3, and a short buckle rack with a liquid hole milled between the outer diameter and the inner diameter. The throat pipe rack 2 is designed to connect the special coupling 1, support and fix the throat pipe 3 with the inner diameter, and pass the liquid axially;

[0033] The outer large pump barrel 4 is connected to a special coupling 1 on the upper side and a variable buckle joint 13 on the lower side, and has a thick wall, common pipe male buckles at both ends, and a pump barrel tube with a high-finish round diameter on the inner diameter;

[0034] The plunger metal sealing ring 7 is designed for sealing the multi-channel large plunger frame 6 and the inner diameter of the outer large pump barrel 4. It is a cylinder sliding sealing ring made of high hardness and elastic metal;

[0035] The sliding valve sleeve 10 is combined with the reduced diameter light pipe at the bottom of the multi-channel large plunger frame 6, the polytetrafluoroethylene sealing ring 8, and the limit pin 11 to form a sliding switch valve. The upper radial end face and the inner diameter of the sliding valve sleeve 10 are high-finish surfaces, the lower end of the outer diameter is a thickened circular concave radial end face, and the upper 3 / 4 part is a section of light pipe after the reduction;

[0036] like Figure 1 As shown: the flow channel large plunger skeleton 6 has a plurality of liquid outlet holes evenly distributed radially at the lower point where the outer light tube is reduced in diameter.

[0037] A polytetrafluoroethylene sealing ring 8 is provided at the lower outer side of the multi-channel large plunger skeleton 6, and the polytetrafluoroethylene sealing ring 8 is matched with the upper section of the sliding valve sleeve 10 to seal and close the radially uniformly distributed liquid outlet holes at the lower point of the multiple outer light tube reduction points of the channel large plunger skeleton 6.

[0038] Specifically: the multi-channel large plunger skeleton 6 is an ordinary tube female buckle that is connected, fixed, and limited to the lower 1 / 2 part of the outer diameter of the nozzle 5 at the upper 1 / 5 part of the inner diameter. The lower 3 / 5 part of the inner diameter of the female buckle is a gradually expanding bell mouth. The lower end of the bell mouth is provided with two axially parallel, radially outwardly downward inclined, and three groups of liquid inlet holes evenly distributed on the outer diameter. The lower 1 / 5 part is an ordinary tube female buckle connected to the upper part of the drainage plug 9. The upper 1 / 3 part of the outer diameter is axially provided with three evenly distributed grooves for installing the plunger metal sealing ring 7. After the lower end is reduced in diameter, it becomes a full-diameter light tube. The shoulder of the reduced diameter is provided with a groove for installing a polytetrafluoroethylene sealing ring 8. The lower point of the light tube reduction is radially provided with evenly distributed liquid outlet holes. The outer diameter of the light tube is an ordinary tube male buckle connected to the small plunger 12. An overpass liquid passage is milled between the outer diameter and the inner diameter to avoid the three groups of liquid inlet holes evenly distributed on the outer diameter;

[0039] The polytetrafluoroethylene sealing ring 8 is a dovetail sealing ring pressed from polytetrafluoroethylene material. The polytetrafluoroethylene sealing ring 8 is matched with the upper section of the sliding valve sleeve 10 to seal and close the multiple outer light tube reduction points of the flow channel large plunger skeleton 6 and radially evenly distributed liquid outlet holes.

[0040] like Figure 1As shown: the sliding valve sleeve 10 is connected to the small plunger 12 via a limit pin 11.

[0041] Specifically, the limit pin 11 is designed for the sliding distance of the sliding valve sleeve 10. Two symmetrically riveted equal-diameter cylindrical metal pins are fixed on the outer diameter of the upper end of the small plunger 12. The upper end of the inner diameter of the small plunger 12 has a common pipe male buckle connected to the inner smooth pipe outer diameter of the lower part of the multi-channel large plunger skeleton 6, and the lower end outer diameter has a common pipe male buckle connected to the inner diameter common pipe female buckle of the upper end of the lower joint 15. The other parts are uniform equal-diameter through pipes, and the outer diameters are all equal-diameter, high-finish smooth pipes from top to bottom. It is designed to pass the formation fluid inside and match the small pump barrel 14 to pump the formation fluid in the downstroke and pump the formation fluid in the upstroke to boost the pressure.

[0042] like Figure 1 As shown: the upper inner diameter portion of the throat pipe 3 is a high-finish round diameter, and the lower inner diameter portion of the throat pipe 3 is a gradually expanding bell mouth.

[0043] Specifically, the throat 3 is designed to shrink, suck and collect surrounding liquids. It is fixed on the inner diameter thread of the throat rack 2 by threads. The upper 1 / 3 of its inner diameter is a high-finish round diameter, and the lower 2 / 3 of its inner diameter is a gradually expanding bell mouth. The upper 1 / 3 of its outer diameter is provided with a common pipe male buckle connected and fixed to the inner diameter of the throat rack 2, and the lower 2 / 3 of its inner diameter is an expanding bell mouth with a certain thickness along with the inner diameter.

[0044] like Figure 1 As shown: the upper outer portion of the drainage plug 9 is provided with threads, and the lower end of the drainage plug 9 is conical.

[0045] Specifically, the drainage plug 9 is designed to guide the formation fluid in the channel of the small plunger 12 to flow through the cross-flow liquid passage milled between the outer diameter and the inner diameter of the multi-channel large plunger skeleton 6 to avoid the three groups of liquid inlet holes evenly distributed on the outer diameter, and reduce the flow resistance. The upper outer diameter of the drainage plug 9 is equipped with an ordinary pipe male buckle that is connected to the lower 1 / 5 of the inner diameter of the multi-channel large plunger skeleton 6, and the lower half is a pointed cone. The inner diameter is a whole solid plug.

[0046] like Figure 1 As shown, the nozzle 5 is a circular diameter with a high-finish upper inner diameter portion, and the lower inner diameter portion of the nozzle 5 is a gradually expanding bell-mouth circular diameter with a high-finish lower inner diameter portion.

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

[0048] like Figure 1As shown: the upper outer portion of the outer large pump barrel 4 is connected to the special coupling 1 through a threaded sleeve, and the lower outer portion of the outer large pump barrel 4 is connected to the variable buckle joint 13 through a threaded sleeve.

[0049] Specifically, the variable buckle joint 13 is designed to connect the outer large pump barrel 4 at the top and the small pump barrel 14 at the bottom. The inner diameter of its upper end has a common female buckle connected to the lower end of the outer large pump barrel 4, and the inner diameter of its lower end has a common female buckle connected to the upper end of the small pump barrel 14. There is a variable diameter through hole between the two. The outer diameter is the upper large and small smooth tube, and the middle part is a reduced diameter transition section;

[0050] like Figure 1 As shown: the inner side of the variable buckle joint 13 is threadedly connected to the small pump barrel 14, and the lower outer side 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 tube with a high-finish round diameter inside, with a common tube male buckle connected to the lower end of the variable buckle joint 13 at the upper end of the outer diameter, and the rest is a smooth tube of equal diameter, which is designed for sliding sealing on the small plunger 12;

[0052] The lower joint 15 is designed to connect the small plunger 12 to the supporting tool, and is also the only inlet for formation fluid. The upper inner diameter of the lower joint 15 has a common female buckle connected to the lower end of the small plunger 12, and the lower inner diameter is a through-clear pipe. The upper outer diameter is a smooth female, the middle is a reduced diameter transition section, and the lower end is reduced in diameter and is provided with a standard φ73mm flat oil pipe buckle.

[0053] like Figure 1 As shown: a circular groove is provided on the upper outer side of the multi-channel large plunger skeleton 6.

[0054] Specifically, the annular groove is for installing the plunger metal sealing ring 7.

[0055] When the equipment is in use, the lower end of the device is connected to the tubing anchor on the ground, and the upper end is connected to the lower liquid inlet of the tubular oil pump. Then the entire lift string is lowered into the well according to the design. When the tubing anchor in the well is anchored to the oil well casing, the construction is completed. When the ground pumping unit drives the sucker rod downward, the sucker rod is connected to the plunger of the downhole oil pump and moves downward to pressurize the liquid in the pump chamber. When the liquid pressure in the pump chamber is higher than the pressure in the entire lift string, the plunger floating valve opens. At this time, the pressure of the liquid column in the entire lift string directly acts on the fixed valve seat at the lower end of the oil pump;

[0056] The overall structure is to fully utilize the inertial force of the lifting column (tubing) to provide energy to the ejector under the tubular pump without increasing external force or consuming the energy of the well equipment. The ejector pumps, gathers and straightens the formation fluid through the jet, increases the thrust on the bottom valve of the pump during the gathering process, and forces the fixed bottom valve under the pump to open and let in liquid immediately when the plunger moves upward. When the liquid is fed in, the throat 3 gathers, straightens and speeds up, increasing the flow rate into the pump barrel, speeding up the pump filling speed, achieving the purpose of high pump efficiency, and playing a better role in improving pump efficiency, increasing single well production, and improving system efficiency in oil fields.

[0057] Example:

[0058] The research of the present invention effectively utilizes the elastic expansion and contraction of the oil pipe, transfers the elastic expansion and contraction energy of the oil pipe to the pump barrel, and compresses and pressurizes the formation liquid in the energy storage liquid chamber by the pump barrel and the plunger. The pressurized formation fluid generates a jet through the upper nozzle 5, and the jet liquid generates negative pressure through the throat pipe 3 inlet to draw the surrounding formation fluid through the throat pipe 3 at high speed. After the high-speed, converged formation liquid column flows out of the throat pipe 3, it further carries the surrounding formation fluid to rush to the bottom valve ball of the tubular pump, forcing the bottom valve ball to open quickly to let in liquid. This process enables the tubular pump to open the bottom valve quickly during the upstroke, the liquid inlet speed is fast, and the pump barrel filling coefficient is high. It is a good device to achieve high pump efficiency and increase the daily liquid production of a single well. This research and development provides a new auxiliary pumping and lifting efficiency enhancement device for conventional rod pumping pumps, especially deep pumping, and provides a new technology for increasing the production, pump efficiency and system efficiency of oil wells.

[0059] In the prior art, the equipment closest to this patent is found. Invention 1 is a matching high-pressure gas well addition device, which requires high-pressure gas from adjacent wells. The limited conditions make it impossible to promote it on a large scale. Invention 2 is a dosing device for high-gas wells, which is not comparable to this device. Invention 3 is a modification of the pump itself, and the pump structure is complex and prone to problems such as jamming and leakage. The present invention makes full use of the elastic expansion and contraction energy of the pipe column, which is not comparable to this device and does not have a substantial impact on the novelty and creativity of this patent. The comparative analysis is as follows:

[0060] 1. China invention patent "Method and device for boosting oil production by high-pressure gas-liquid injection from adjacent wells at mudline wellhead in deepwater oilfield"

[0061] (CN103032054B). This patent converts the fluid pressure of high-pressure gas wells into the power for pressurizing low-pressure oil wells on the seabed, achieving one-stage pressurization, thereby significantly reducing the oil pressure of low-pressure oil wells on the seabed, extending their self-flowing period, and improving the self-flowing recovery rate. This patent requires supporting high-pressure gas wells, and the conditions are limited, so it cannot be promoted and applied.

[0062] 2. China's invention patent "An integrated device for pressurizing, collecting and adding chemicals to oil wells" (CN110593821A). The pressure of the crude oil in the oil pipe is used to compress the gas cavity and pressurize the natural gas, which can also meet the requirements of pressurizing and adding chemicals to high-pressure natural gas. This patent is for a pressurizing and adding chemicals device for high-gas-content wells and has no relevance to this patent.

[0063] 3. China's invention patent "boosting lifting pipe" (CN116163686A). The lifting pipe body includes an upper chamber and a lower chamber. Part of the liquid in the upper chamber of the boosting lifting pipe pump will be transported to the jet assembly through a pipeline. This part of the liquid will be pressurized by the jet assembly, and the pressurized liquid will be mixed with the bottom of the well and written into the lower chamber of the pump. The pump structure is modified, and the applicable conditions of the pump (depth, inclination, etc.) are limited. The pump structure is easy to get stuck, leak, etc.

[0064] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. It will be apparent to those skilled in the art that various modifications to these embodiments are possible, 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 applied for by the present application.

Claims

1. A tubular pump underjet enhancer, characterized in that: include: A throat pipe (3), the upper part of which is threadably plugged into the middle part of a throat pipe frame (2), and the throat pipe frame (2) is buckled and arranged on the inner side of a special coupling (1); A multi-channel large plunger frame (6), the upper end of the multi-channel large plunger frame (6) is connected to a nozzle (5), the inner lower end of the multi-channel large plunger frame (6) is provided with a drainage plug (9), the outer side of the lower end of the multi-channel large plunger frame (6) is fixedly connected to a sliding valve sleeve (10), and the outer upper part of the multi-channel large plunger frame (6) is sealed and arranged on the upper part of the inner cavity of the outer large pump barrel (4) through a plunger metal sealing ring (7); The throat (3) is located on the upper side of the nozzle (5).

2. The tubular pump down jet enhancer according to claim 1, characterized in that: The large plunger frame (6) of the flow channel has a plurality of liquid outlet holes evenly distributed radially at the lower point of the reduced diameter of the outer light tube.

3. The tubular pump down jet enhancer according to claim 1, characterized in that: A polytetrafluoroethylene sealing ring (8) is provided at the lower outer portion of the multi-channel large plunger skeleton (6), and the polytetrafluoroethylene sealing ring (8) matches the upper section of the sliding valve sleeve (10) to seal and close the radially uniformly distributed liquid outlet holes at the lower points of the multiple outer light tube reduction of the channel large plunger skeleton (6).

4. The tubular pump down jet enhancer according to claim 1, characterized in that: The sliding valve sleeve (10) is connected to a small plunger (12) via a limit pin (11).

5. The tubular pump down jet enhancer according to claim 1, characterized in that: The upper inner diameter portion of the throat pipe (3) is a high-finish round diameter, and the lower inner diameter portion of the throat pipe (3) is a gradually expanding bell mouth.

6. The tubular pump down jet enhancer according to claim 1, characterized in that: The upper outer portion of the drainage plug (9) is provided with a thread, and the lower end of the drainage plug (9) is conical.

7. The tubular pump down jet enhancer according to claim 1, characterized in that: The nozzle (5) is a circular diameter with a high-finish upper inner diameter portion, and the lower inner diameter portion of the nozzle (5) is a gradually expanding bell-mouth circular diameter with a high-finish lower inner diameter portion.

8. The tubular pump underjet amplifier according to claim 1, characterized in that: The upper outer portion of the outer large pump barrel (4) is threadedly sleeved with a special coupling (1), and the lower outer portion of the outer large pump barrel (4) is threadedly sleeved with a variable-buckle joint (13).

9. The tubular pump underjet enhancer according to claim 8, characterized in that: The inner side of the variable buckle joint (13) is threadedly plugged into the small pump barrel (14), and the lower outer side of the small pump barrel (14) is fixedly sleeved with the lower joint (15).

10. The tubular pump underjet amplifier according to claim 1, characterized in that: A circular groove is formed on the upper outer portion of the multi-channel large plunger skeleton (6).

Images