Nitrogen gas-lift liquid discharging device

Abstract

The utility model belongs to the technical field of nitrogen lifting drainage, and particularly relates to a nitrogen gas lifting drainage device which comprises a gas lifting valve, a pipe body is arranged on one side of the gas lifting valve, a through pipe is installed in the pipe body, a gas rod is arranged on one side of the through pipe in an attached mode, the lower end of the gas rod is connected with a gathering pressurization mechanism, and a gas inlet mechanism is arranged on one side of the gas rod and located in the gas lifting valve. The air inlet mechanism comprises a transmission cylinder which is fixedly installed on one side of the lower portion in the gas lift valve, one side of the transmission cylinder communicates with an air inlet pipe, one end of the air inlet pipe extends out of the gas lift valve, and a connecting pipe is arranged on the side, away from the air inlet pipe, of the transmission cylinder. By means of high-speed nitrogen pushing blades, driving a rotating shaft and a branch pipe to rotate and cooperation of reverse acting force generated when the branch pipe sprays air and nitrogen pushing, nitrogen cyclone liquid spraying is achieved, nitrogen can be evenly distributed, liquid can be stirred, the gas flowing path can be widened, local nitrogen gathering is prevented, and gas-liquid mixing is promoted; and nitrogen can be in full contact with liquid, buoyancy is exerted, and the lifting and liquid discharging efficiency of the gas lift valve is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen lift drainage technology, and in particular to a nitrogen lift drainage device. Background Technology

[0002] Nitrogen lift drainage devices are characterized by safe construction, simple process, fast drainage speed, and controllable drainage depth. They are particularly suitable for drainage of gas-bearing wells. Nitrogen is an inert gas that does not react chemically or explode with other substances at room temperature. It has low operating costs and is easy to transport. At the same time, the gas lift valve is an essential part of the nitrogen lift drainage device.

[0003] Referring to the patent with publication number CN218862587U, a nitrogen gas lift liquid discharge device is disclosed. It can use a gas cover and a hollow block to allow the liquid on the top of the gas lift to enter the gas cover and the hollow block to accumulate, thereby increasing the pressure of the gas rod and making the gas rod less susceptible to sliding due to pressure during the gas lift process.

[0004] However, the aforementioned nitrogen gas lift drainage device uses a simple direct injection air intake structure. After nitrogen enters the liquid, it tends to accumulate locally near the air inlet, making it difficult to distribute evenly throughout the entire wellbore liquid column. As a result, the lifting force of the gas lift valve on the liquid cannot be evenly applied to the entire liquid column. In some areas, the liquid cannot be effectively lifted due to insufficient nitrogen buoyancy, which seriously affects the gas lift drainage efficiency, increases drainage time and cost, and restricts the high-efficiency production of oil wells. Utility Model Content

[0005] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A nitrogen gas lift drainage device includes a gas lift valve, a pipe body on one side of the gas lift valve, a through pipe installed inside the pipe body, a gas rod attached to one side of the through pipe, and two support plates extending from the upper end of the gas rod to the outer sleeve of the gas lift valve. A spring and an air bladder are symmetrically arranged between the support plates. A fixing mechanism is provided on the support plates. A gathering and pressurizing mechanism is connected to the lower end of the gas rod. An air inlet mechanism is provided on one side of the gas rod inside the gas lift valve.

[0008] The air intake mechanism includes a transmission cylinder, which is fixedly installed on one side of the lower part of the air lift valve. One side of the transmission cylinder is connected to an air intake pipe, and one end of the air intake pipe extends to the outside of the air lift valve. A connecting pipe is provided on the side of the transmission cylinder away from the air intake pipe, and the upper end of the connecting pipe is connected to the top of the transmission cylinder.

[0009] As an improved technical scheme, the air inlet mechanism further comprises a flow guide seat, the flow guide seat is fixedly installed at the top of the transmission cylinder, a rotating shaft is rotatably connected to the bottom of the flow guide seat, the rotating shaft is a hollow structure with two open ends, a flow distribution disc is connected to the lower end of the rotating shaft outside the transmission cylinder, a plurality of branch pipes are symmetrically arranged on the outer side of the flow distribution disc, and a plurality of blades are symmetrically arranged on the inner wall of the flow guide seat.

[0010] As an improved technical scheme, the air inlet pipe and the connecting pipe are tangent to the transmission cylinder at one end connected to the side wall of the transmission cylinder, and the inner wall surface of the flow guide seat is an inverted circular truncated cone.

[0011] As an improved technical scheme, the flow distribution disc is a hollow structure, the branch pipes are L-shaped structures, and the two branch pipes are arranged in a circumferentially equidistant array, and a plurality of through holes are formed in the outer wall of the gas rod.

[0012] As an improved technical scheme, the fixing mechanism comprises a sliding block, the sliding blocks are symmetrically arranged on the two sides of the spring and the air bag, one sliding block is connected to each end of the spring and the air bag, a plurality of sliding grooves adapted to the sliding blocks are symmetrically formed in one side of the supporting plate, a limiting block is arranged in the sliding groove on the side of the sliding block, a torsion bar is rotatably installed in the limiting block, a plurality of supporting rods are symmetrically arranged on the outer wall of the torsion bar, an insertion rod is movably connected to one end of the supporting rod through a connecting rod, the insertion rod is inserted into the insertion groove symmetrically formed in the inner wall of the sliding groove on the opposite outer side, a torsion spring is sleeved on the outer side of the torsion bar close to the supporting rod on the side of the sliding block, and the two ends of the torsion spring are fixedly connected with the torsion bar and the limiting block.

[0013] As an improved technical scheme, the sliding block and the limiting block are both convex structures, and the sliding block and the limiting block are slidably connected with the sliding groove, and the supporting plate below is fixedly connected with the gas lift valve.

[0014] As an improved technical scheme, the supporting rod, the connecting rod and the insertion rod are arranged in a circumferentially equidistant array, the two ends of the connecting rod are hingedly connected with the supporting rod and the insertion rod respectively, and one end of the torsion bar extends to the outer side of the limiting block and is connected with a handle.

[0015] After the above technical scheme is adopted, the beneficial effects of the present application are as follows:

[0016] 1. The nitrogen gas is pushed by high-speed conveying to drive the blades and the rotating shaft, and the branch pipes are rotated, and at the same time, since the gas blows out from the branch pipes to generate a reverse force, the branch pipes further drive the rotating shaft to rotate, and the two rotating modes are matched to rotate the nitrogen gas into the liquid; on the one hand, the nitrogen gas is more uniformly distributed to stir the liquid, a wider flow path is formed to avoid the nitrogen gas gathering in a local area, and the gas-liquid mixing is effectively promoted; on the other hand, the nitrogen gas can be fully contacted with the liquid to better play the buoyancy effect of the nitrogen gas on the liquid, and the lifting capacity and the liquid discharge effect of the gas lift valve on the liquid are significantly improved.

[0017] 2. The utility model discloses a fixing mechanism can conveniently dismantle and replace when spring or air bag is corroded and aged. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be to the embodiment description needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings. Among them:

[0019] Figure 1 It is the overall structure schematic diagram of a nitrogen gas lift liquid discharge device of the utility model.

[0020] Figure 2 It is the partial section structure schematic diagram of the gas lift valve of a nitrogen gas lift liquid discharge device of the utility model.

[0021] Figure 3 It is the partial section structure schematic diagram of the transmission cylinder of a nitrogen gas lift liquid discharge device of the utility model.

[0022] Figure 4 It is the structure schematic diagram between the support plate and the limiting block of a nitrogen gas lift liquid discharge device of the utility model.

[0023] Figure 5 It is the partial section structure schematic diagram of the limiting block of a nitrogen gas lift liquid discharge device of the utility model.

[0024] Figure 6 It is the Figure 5 Enlarged structure schematic diagram of A of a nitrogen gas lift liquid discharge device of the utility model.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, gas lift valve, 2, pipe body, 3, gas rod, 4, through pipe, 5, spring, 6, air bag, 7, support plate, 8, sliding block, 9, sliding groove, 10, gather pressure increasing mechanism, 11, inlet pipe, 12, transmission cylinder, 13, flow guide seat, 14, rotating shaft, 15, blade, 16, connecting pipe, 17, shunt disc, 18, branch pipe, 19, limiting block, 20, torsion bar, 21, support rod, 22, connecting rod, 23, plug rod, 24, torsion spring. DETAILED DESCRIPTION

[0027] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0028] It should be noted that all directional indications (such as upper, lower, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0029] Meanwhile, "and / or" or "and / or" appearing throughout the text means including three schemes, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes are satisfied at the same time.

[0030] In addition, in the present application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skill in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0031] For example, Figure 1 Figure 3 ​As shown, the embodiment provides a nitrogen gas lift liquid discharge device, which comprises a gas lift valve 1, one side of the gas lift valve 1 is provided with a pipe body 2, a through pipe 4 is installed in the pipe body 2, a gas rod 3 is attached on one side of the through pipe 4, two supporting plates 7 are arranged on the outer sleeve of the gas lift valve 1, springs 5 and air bags 6 are symmetrically arranged between the supporting plates 7, a fixing mechanism is arranged on the supporting plate 7, and an aggregation and pressurization mechanism 10 is connected to the lower end of the gas rod 3. In this example, the aggregation and pressurization mechanism 10 comprises a gas cover, a fixing rod and a hollow block, so that when the liquid is lifted up, the lifted liquid can enter the gas cover and the hollow block to aggregate, so as to increase the pressure of the gas rod 3. The specific principle and structure can be referred to the corresponding part of the reference file mentioned above. An air inlet mechanism is arranged in the gas lift valve 1 on one side of the gas rod 3. The air inlet mechanism comprises a transmission cylinder 12, which is fixedly installed on one side of the lower part in the gas lift valve 1. One side of the transmission cylinder 12 is communicated with an air inlet pipe 11, and one end of the air inlet pipe 11 extends out of the gas lift valve 1. A connecting pipe 16 is arranged on the side of the transmission cylinder 12 away from the air inlet pipe 11, and the upper end of the connecting pipe 16 is connected with the top of the transmission cylinder 12.

[0032] In this example, the air inlet mechanism further comprises a flow guide seat 13, which is fixedly installed on the top of the transmission cylinder 12. A rotating shaft 14 is rotatably connected to the bottom of the flow guide seat 13, and the rotating shaft 14 is a hollow structure with two open ends. A flow distribution disc 17 is connected to the lower end of the rotating shaft 14 outside the transmission cylinder 12. A plurality of blades 15 are symmetrically arranged on the outer wall of the rotating shaft 14 inside the transmission cylinder 12. In this way, the nitrogen gas can be sprayed into the liquid in a rotating manner, so that the nitrogen gas is more evenly distributed, the liquid is stirred, a wider flow path is formed, the nitrogen gas is prevented from gathering in a local area, the gas-liquid mixing is effectively promoted, the nitrogen gas and the liquid are fully contacted, the buoyancy effect of the nitrogen gas on the liquid is better exerted, and the lifting capacity and the liquid discharge effect of the gas lift valve 1 on the liquid are improved.

[0033] In this example, the end of the air inlet pipe 11 and the connecting pipe 16 connected with the side wall of the transmission cylinder 12 is tangent to the transmission cylinder 12. The inner wall surface of the flow guide seat 13 is in the shape of an inverted circular truncated cone, so as to guide the nitrogen gas to enter the rotating shaft 14.

[0034] In this example, the flow distribution disc 17 is a hollow structure, the branch pipes 18 are in the shape of L, and the two branch pipes 18 are arranged in a circumferentially equidistant array. A plurality of through holes are arranged on the outer wall of the gas rod 3, so that the nitrogen gas is distributed to the two branch pipes 18 through the flow distribution disc 17. The structure of the branch pipe 18 enables the nitrogen gas to be sprayed out to drive the branch pipe 18 to rotate with the flow distribution disc 17 and the rotating shaft 14.

[0035] As shown in the drawings, Figure 1 , Figure 4 - Figure 6As shown in the example, the fixing mechanism includes a slider 8, which is symmetrically arranged on both sides of the spring 5 and the airbag 6. Each end of the spring 5 and the airbag 6 is connected to a slider 8. A groove 9 adapted to the slider 8 is symmetrically opened on one side of the support plate 7. A limiting block 19 is provided on one side of the slider 8 in the groove 9. A torsion rod 20 is rotatably installed in the limiting block 19. A support rod 21 is symmetrically provided on the outer wall of the torsion rod 20. One end of the support rod 21 is movably connected to an insertion rod 23 through a connecting rod 22. The outer end of the insertion rod 23 is inserted into a slot symmetrically opened on the inner wall of the groove 9. A torsion spring 24 is sleeved on the outer side of the torsion rod 20 on the side of the support rod 21 near the slider 8. Both ends of the torsion spring 24 are fixedly connected to the torsion rod 20 and the limiting block 19, respectively, so as to disassemble and replace the corroded and aged spring 5 or airbag 6.

[0036] In this example, both slider 8 and limit block 19 are convex-shaped structures, and slider 8 and limit block 19 are slidably connected to slide groove 9. The lower support plate 7 is fixedly connected to air lift valve 1 so as to limit and guide slider 8 and limit block 19.

[0037] In this example, the support rod 21, the connecting rod 22 and the insertion rod 23 are all arranged in a circumferentially equidistant array. The two ends of the connecting rod 22 are hinged to the support rod 21 and the insertion rod 23 respectively. One end of the torsion bar 20 extends to the outside of the limiting block 19 and is connected to a handle so that the torsion handle can be twisted to drive the two insertion rods 23 to move in opposite directions in a synchronous manner.

[0038] In use, by connecting one end of the inlet pipe 11 to an external nitrogen supply device, high-speed nitrogen enters the transmission cylinder 12, which in turn drives the blades 15 to rotate the connected shaft 14. The shaft 14 then drives the distribution plate 17 and the branch pipe 18 to rotate synchronously. The nitrogen entering the transmission cylinder 12 is guided to the shaft 14 through the connecting pipe 16, and then distributed to the branch pipe 18 by the distribution plate 17 before being blown into the liquid. This allows the branch pipe 18 to rotate and spray nitrogen. Due to the structure of the branch pipe 18, the spraying of nitrogen generates a reverse force that drives the branch pipe 18 to rotate the distribution plate 17 and the shaft 14. This, along with the nitrogen-driven blades 15 rotating the shaft 14, assists each other, allowing the branch pipe 18 to rotate better. This results in a more uniform distribution of nitrogen in the liquid, and the branch pipe 18 also agitates the liquid, allowing for better mixing of nitrogen and liquid. This method enables a more uniform distribution of nitrogen and forms a wider flow path, preventing nitrogen from accumulating in localized areas and ensuring sufficient contact between nitrogen and liquid. This design allows for better utilization of nitrogen's buoyancy on the liquid, significantly improving the lifting capacity and drainage effect of the air lift valve, making it more practical. When spring 5 or air bladder 6 needs replacement due to aging or damage, the handle can be twisted to rotate the connected torsion rod 20, causing it to twist the torsion spring 24. Simultaneously, the torsion rod 20 drives the support rod 21, which in turn drives the connecting rod 22 and the insertion rod 23, causing the two insertion rods 23 to move inward relative to each other, thus moving them out of the slot. Then, the limiting block 19 is removed from the slide groove 9, and the sliding slider 8 will connect with it. After removing the spring 5 or airbag 6, replace it with a new spring 5 or airbag 6 and repeat the above steps. After installing the slider 8 into the slide groove 9, use the limiting block 19 to block and limit its fixation. After installing the limiting block 19 into the slide groove 9, release the force applied to the handle, and the torsion rod 20 will be reset under the torque of the torsion spring 24, thereby allowing the insertion rod 23 to be reset and inserted into the corresponding slot, completing the fixation of the limiting block 19, and thus completing the installation and limiting of the spring 5 and airbag 6. It is convenient to use and highly practical.

[0039] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A nitrogen gas lift liquid discharge device, comprising a gas lift valve (1), characterized in that: The air lift valve (1) has a pipe body (2) on one side, and a through pipe (4) is installed inside the pipe body (2). A rod (3) is attached to one side of the through pipe (4), and the upper end of the rod (3) extends to the air lift valve (1) and is fitted with two support plates (7). A spring (5) and an air bag (6) are symmetrically arranged between the support plates (7). A fixing mechanism is provided on the support plates (7). A gathering and pressurizing mechanism (10) is connected to the lower end of the rod (3). An air intake mechanism is provided on one side of the rod (3) inside the air lift valve (1). The air intake mechanism includes a transmission cylinder (12), which is fixedly installed on the lower side of the air lift valve (1). One side of the transmission cylinder (12) is connected to an air intake pipe (11), and one end of the air intake pipe (11) extends to the outside of the air lift valve (1). A connecting pipe (16) is provided on the side of the transmission cylinder (12) away from the air intake pipe (11), and the upper end of the connecting pipe (16) is connected to the top of the transmission cylinder (12).

2. The nitrogen gas lift liquid discharge device according to claim 1, characterized in that: The air intake mechanism also includes a guide seat (13), which is fixedly installed on the top of the transmission cylinder (12). The bottom of the guide seat (13) is rotatably connected to a rotating shaft (14), which is a hollow structure with two ends. The lower end of the rotating shaft (14) is connected to a flow divider (17) outside the transmission cylinder (12). The flow divider (17) is symmetrically provided with branch pipes (18) on the outside. The outer wall of the rotating shaft (14) is symmetrically provided with several blades (15) inside the transmission cylinder (12).

3. The nitrogen gas lift liquid discharge device according to claim 2, characterized in that: The ends of the air inlet pipe (11) and the connecting pipe (16) connected to the side wall of the transmission cylinder (12) are tangent to the transmission cylinder (12), and the inner wall of the guide seat (13) is an inverted frustum shape.

4. The nitrogen gas lift liquid discharge device according to claim 3, characterized in that: The distribution plate (17) is hollow, the branch pipe (18) is L-shaped, and the two branch pipes (18) are arranged in a circumferentially equidistant array. The outer wall of the air rod (3) has several through holes.

5. A nitrogen gas lift liquid discharge device according to claim 2, characterized in that: The fixing mechanism includes a slider (8), which is symmetrically arranged on both sides of the spring (5) and the airbag (6). Each end of the spring (5) and the airbag (6) is connected to a slider (8). A groove (9) adapted to the slider (8) is symmetrically opened on one side of the support plate (7). A limiting block (19) is provided in the groove (9) on one side of the slider (8). A torsion bar (20) is rotatably installed in the limiting block (19). A support rod (21) is symmetrically provided on the outer wall of the torsion bar (20). One end of the support rod (21) is movably connected to an insertion rod (23) through a connecting rod (22). The outer end of the insertion rod (23) is inserted into a slot symmetrically opened on the inner wall of the groove (9). A torsion spring (24) is sleeved on the outer side of the torsion bar (20) on the side of the support rod (21) near the slider (8). Both ends of the torsion spring (24) are fixedly connected to the torsion bar (20) and the limiting block (19) respectively.

6. The nitrogen gas lift liquid discharge device according to claim 5, characterized in that: The slider (8) and the limiting block (19) are both convex-shaped structures, and the slider (8) and the limiting block (19) are slidably connected to the slide groove (9). The support plate (7) located below is fixedly connected to the air lift valve (1).

7. A nitrogen gas lift liquid discharge device according to claim 6, characterized in that: The support rod (21), connecting rod (22) and insert rod (23) are arranged in a circumferentially equidistant array. The two ends of the connecting rod (22) are hinged to the support rod (21) and the insert rod (23) respectively. One end of the torsion bar (20) extends to the outside of the limiting block (19) and is connected to a handle.

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