Gas lift liquid remover

Abstract

A gas lift liquid remover comprises an air inlet pipe, a flow dividing seat, a liquid guide ring, a liquid guide gate, an exhaust hood and a filter screen. The flow dividing base and the liquid guide ring are connected through a bolt, and the binding face is sealed through gluing. And the tail end of the liquid guide tile of the liquid guide grid is propped against the liquid guide ring wall of the liquid guide ring. And the jacking feet are inserted into the two sides of the inner ribs of the corresponding liquid guide rings and jack the liquid guide tiles. One end of the filter screen is fixed on the filter screen hanging rod, and the other end is fixed on the filter screen bottom buckle. Wellhead output flow enters the flow guiding channel of the flow dividing base through the air inlet pipe, after passing through the flow guiding channel, the flow impacts the liquid guiding tile, separated liquid flows downwards and is collected along the upper surface and the lower surface of the liquid guiding tile, and liquid-removed gas flows out from an outlet above the exhaust hood. The air flow is allowed to pass at a high speed during liquid removal, and the whole device is compact in structure and small in occupied area.

Description

Technical Field

[0001] This utility model relates to a gas lift deliquometer, specifically a device used in oil fields to remove liquid from wellhead produced gas. Background Technology

[0002] In the middle and late stages of gas well development, insufficient formation pressure and increased water production lead to fluid accumulation at the bottom of the well, resulting in a decrease in gas production. To restore production in wells with accumulated fluid, gas lift drainage is a common measure adopted by oilfields.

[0003] The produced gas from the wellhead carries a large amount of liquid, which needs to be deliquescent before entering the next stage of processing. Currently, the gas-liquid separators used in oil fields are large in size and complex in structure. In some application scenarios, geographical limitations have caused difficulties for the design of existing gas-liquid separators in oil fields. Summary of the Invention

[0004] To address the space-consuming issue of existing gas-liquid separators, this invention proposes a gas-lift dehydrator. This invention features a compact structure, occupies little space, and allows wellhead-produced gas to pass through at high speed to complete the dehydration process.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This utility model includes an air inlet pipe, a flow divider, a liquid guide ring, a liquid guide grid, an exhaust hood, and a filter screen. The flow divider and the liquid guide ring are connected by bolts, and the mating surfaces are sealed with adhesive. The end of the liquid guide tile of the liquid guide grid abuts against the wall of the liquid guide ring. Top feet are inserted on both sides of the corresponding inner rib of the liquid guide ring, and the top feet abut against the liquid guide tile. One end of the filter screen is fixed to the filter screen hanging rod, and the other end is fixed to the bottom buckle of the filter screen. The wellhead produced material enters the guide channel of the flow divider through the air inlet pipe. After passing through the guide channel, the airflow impacts the liquid guide tile, and the separated liquid flows downward along the upper and lower surfaces of the liquid guide tile and collects. The deliquescent gas flows out from the upper outlet of the exhaust hood.

[0006] The beneficial effects of this utility model are: this utility model allows high-speed airflow during airflow dehydration, the overall device structure is compact, and it occupies a small area. Attached Figure Description

[0007] Figure 1 This is the air inlet pipe of this utility model.

[0008] Figure 2 , 3 This is the flow divider of this utility model.

[0009] Figure 4 This is the liquid guide seat of this utility model.

[0010] Figure 5 , 6 This utility model relates to a liquid guiding grid.

[0011] Figure 7This utility model is a ventilation hood.

[0012] Figure 8 Assembly step 1 of this utility model.

[0013] Figure 9 This is assembly step 2 of the present invention.

[0014] Figure 10 This is assembly step 3 of the present invention.

[0015] Figure 11 This is the assembled state of this utility model.

[0016] Among them, 1. Inlet duct, 1-1. Inlet duct body, 1-2. Inlet duct port, 1-3. Inlet duct reinforcing plate, 1-4. Inlet duct guide plate, 2. Flow divider seat, 2-1. Inner wall of the flow guide channel, 2-2. Outer wall of the flow guide channel, 2-3. Straightening plate, 2-4. Inner support plate, 2-5. Bottom cover, 2-6. Bottom cover reinforcing rib, 2-7. Reinforcing ring, 2-8. Outer support plate, 2-9. Inlet duct hole, 2-10. Flow divider seat bottom flange, 2-11. Flow divider seat top flange, 2-12. Flow guide channel port, 3. Guide Liquid ring, 3-1, top flange of liquid guide ring, 3-2, wall of liquid guide ring, 3-3, bottom flange of liquid guide ring, 3-4, outer rib of liquid guide ring, 3-5, inner rib of liquid guide ring, 3-6, bottom buckle of filter screen, 3-7, baffle ring, 4, liquid guide grid, 4-1, liquid guide tile, 4-2, vent hole of liquid guide tile, 4-3, groove of liquid guide tile, 4-4, hanging rod of filter screen, 5, exhaust hood, 5-1, bottom flange of exhaust hood, 5-2, top foot, 5-3, top flange of exhaust hood, 5-4, cylinder wall of exhaust hood, 5-5, baffle ring, 6, filter screen. Detailed Implementation

[0017] Depend on Figure 1 As shown, the main structure of the air inlet duct 1 has a rectangular cross-section and a circular air outlet at the end. This invention requires a certain structural strength for the air inlet duct 1, so an air inlet duct reinforcing plate 1-3 is provided to increase the structural strength of the air inlet duct 1. An air inlet duct guide plate 1-4 is arranged on the air inlet duct reinforcing plate 1-3, which guides the high-speed airflow to the air outlet. At the air outlet position is an air inlet duct port 1-2, which is a widened conical surface.

[0018] Depend on Figure 2 , 3As shown, the bottom of the diverter seat 2 is a bottom flange 2-10, above which is a cylindrical structure. One side of the cylindrical structure has an air inlet duct 2-9, with a chamfered outer edge on the upper edge and a chamfered inner edge on the lower edge. The cylindrical structure has a bottom cover 2-5, which is a curved conical surface. An outer support plate 2-8 is located on the outer side of the cylindrical structure and the bottom cover 2-5, connecting to the bottom flange 2-10 at the bottom and the top flange 2-11 at the top, thus strengthening the structure. A reinforcing rib 2-6 is added to the outer side of the bottom cover 2-5, connected to the outer support plate 2-8 via a reinforcing ring 2-7, increasing the structural strength of the bottom cover 2-5. An inner support plate 2-4 is located on the inner side of the bottom cover 2-5, opposite the outer support plate 2-8, supporting the flow channel. The flow channel consists of an inner wall 2-1, an outer wall 2-2, and a flow straightener 2-3, which can adjust the direction of the gas flow produced from the wellhead. The bottom of the outer wall 2-2 of the guide channel has a guide channel port 2-12.

[0019] Depend on Figure 4 As shown, the main body of the liquid guiding ring 3 consists of a top flange 3-1 on the upper and lower sides, a bottom flange 3-3 on the lower side, and a conical liquid guiding ring wall 3-2 in the middle. The outer rib 3-4 and the inner rib 3-5 are located on the inner and outer sides of the liquid guiding ring wall 3-2, respectively, serving to strengthen the structure. A filter screen bottom clip 3-6 is located on the inner rib 3-5. A downwardly extending baffle ring 3-7 is located inside the bottom flange 3-3.

[0020] Depend on Figure 5 , 6 As shown, the main structure of the liquid guiding grid 4 consists of multiple liquid guiding tiles 4-1. The liquid guiding tiles 4-1 are arched, with the connection points of adjacent liquid guiding tiles 4-1 recessed downwards, forming a recess on the upper surface and an acute-angled edge on the lower surface. Each liquid guiding tile 4-1 has three vent holes 4-2, with the size increasing towards the outer edge. The ends of the liquid guiding tiles 4-1 are machined into arc surfaces, with the curvature matching that of the liquid guiding ring wall 3-2. A liquid guiding tile groove 4-3 is machined at the end of every other liquid guiding tile 4-1. A filter screen hanging rod 4-4 is located at the center of the liquid guiding grid 4.

[0021] Depend on Figure 7 As shown, the main body of the exhaust hood 5, the exhaust hood cylinder wall 5-4, has a conical structure, with a bottom flange 5-1 and a top flange 5-3 at the top and bottom. There is a baffle ring 5-5 on the lower inner side of the bottom flange 5-1, and there are two top feet 5-2 below the baffle ring 5-5.

[0022] Depend on Figure 1 , 2 As shown in numbers 3, 4, 5, 6, 7, 8, 9, 10, and 11.

[0023] During assembly, first position the distributor seat 2, and then connect the bottom flange 2-10 of the distributor seat to the storage tank or drainage pipe with bolts. Next, assemble the air inlet pipe 1. During assembly, the air inlet pipe 1 needs to be inserted at a slight angle into the air inlet pipe hole 2-9. The chamfers on the upper and lower edges of the air inlet pipe hole 2-9 facilitate this angled insertion. After inserting the air inlet pipe 1 into the air inlet pipe hole 2-9, return it to a horizontal position. Then, align the air inlet pipe port 1-2 with the guide channel port 2-12. Seal the contact points of the air inlet pipe port 1-2, the guide channel port 2-12, the air inlet pipe 1, and the air inlet pipe hole 2-9 with adhesive. Finally, connect the air inlet pipe 1 to the wellhead production pipeline. The connection method is determined according to the oilfield's needs.

[0024] After completing the above steps, connect the bottom flange 3-3 of the liquid guide ring to the top flange 2-11 of the diverter seat with bolts. The bolts should be used with a sealing ring, and the mating surfaces should be sealed with adhesive. Then install the liquid guide grid 4, hoisting it through the vent hole 4-2 of the liquid guide tile. Align the liquid guide tile groove 4-3 with the inner rib 3-5 of the liquid guide ring, with the inner rib 3-5 providing support for the liquid guide grid 4. Next, install the filter screen 6. The filter screen 6 is a mesh woven from fine metal chains, with one end fixed to the filter screen hanging rod 4-4 and the other end fixed to the filter screen bottom buckle 3-6. Then install the exhaust hood 5, fixing the bottom flange 5-1 of the exhaust hood and the top flange 3-1 of the liquid guide ring with bolts, and sealing the mating surfaces with adhesive. After installation, insert the two top feet 5-2 of each group into both sides of the corresponding inner rib 3-5 of the liquid guide ring, with the top feet 5-2 pressing against the liquid guide tile 4-1 to restrict its movement.

[0025] When this utility model device is in operation, the produced material taken from the wellhead enters the air inlet pipe 1, flows through the air inlet pipe guide plate 1-4 to the air outlet, and enters the guide channel. The guide channel, composed of the inner wall 2-1 and the outer wall 2-2, changes the fluid flow direction to a circumferential direction, and the rectifier plate 2-3 reduces the occurrence of turbulence. The fluid flowing out of the guide channel impacts the lower surface of the liquid guide tile 4-1, and reaches the upper side of the liquid guide tile 4-1 through the vent hole 4-2, while simultaneously impacting the filter screen 6. When the fluid impacts the lower surface of the liquid guide tile 4-1, it throws the liquid it carries onto the lower surface of the liquid guide tile 4-1, and the liquid accumulates and flows along the connection position of adjacent liquid guide tiles 4-1 to the end of the liquid guide tile 4-1. When the fluid flows through the filter screen 6, most of the liquid is blocked by the filter screen 6 and accumulates in the depression formed by the connection position of two adjacent liquid guide tiles 4-1. A small amount of liquid reaches the inner wall of the exhaust hood cylinder wall 5-4 and flows downward along the inner wall of the exhaust hood cylinder wall 5-4, passing through the baffle ring 5-5 and flowing to the liquid guiding ring wall 3-2. The filtered gas above the filter screen 6 flows out from the upper outlet of the exhaust hood 5, and the filtered liquid flows downward through the depression formed by the connection of two adjacent liquid guiding tiles 4-1, and flows down through the gap between the end of the liquid guiding tile 4-1 and the liquid guiding ring wall 3-2, and then passes through the liquid guiding ring wall 3-2, the liquid guiding ring bottom flange 3-3, the baffle ring 3-7, the inner wall of the bottom cover 2-5 and the cylindrical structure below the bottom cover 2-5 in sequence, and finally flows out from the bottom of the diversion seat 2.

[0026] During the downward flow of liquid, the baffle ring 5-5 prevents liquid from reaching the mating surfaces of the bottom flange 5-1 of the exhaust hood and the top flange 3-1 of the liquid guide ring; the baffle ring 3-7 prevents liquid from reaching the bottom flange 3-3 of the liquid guide ring and the diversion ring.

[0027] The mating surface of the top flange 2-11. Even if the mating surface is immersed, applying sealant to the mating surface will prevent liquid leakage.

Claims

1. An air-lift dehydrator, comprising an air inlet pipe (1) and a filter screen (6), characterized in that it includes a flow divider (2), a liquid guide ring (3), a liquid guide grid (4), and an exhaust hood (5); The flow divider (2) and the liquid guide ring (3) are connected by bolts and the mating surfaces are sealed with glue. The exhaust hood (5) includes a top foot (5-2) and a baffle ring (5-5); The end of the liquid guide tile (4-1) of the liquid guide grid (4) abuts against the liquid guide ring wall (3-2) of the liquid guide ring (3); the top foot (5-2) is inserted on both sides of the corresponding inner rib (3-5) of the liquid guide ring; the top foot (5-2) abuts against the liquid guide tile (4-1).

2. The air-lift dehydrator according to claim 1, characterized in that, The flow divider (2) includes an inner wall (2-1) of the flow guide channel, an outer wall (2-2) of the flow guide channel, a flow straightener (2-3) and an inner support plate (2-4).

3. The air-lift dehydrator according to claim 1, characterized in that, The liquid guiding ring (3) includes a filter screen bottom buckle (3-6) and a flow-blocking ring (3-7).

4. The air-lift dehydrator according to claim 1, characterized in that, The liquid guiding grid (4) includes a liquid guiding tile (4-1), a liquid guiding tile vent hole (4-2), a liquid guiding tile groove (4-3), and a filter screen hanging rod (4-4). The liquid guide tile groove (4-3) is located at the end of the liquid guide tile (4-1), and one liquid guide tile groove (4-3) is provided for each adjacent liquid guide tile (4-1).

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