Platform gas lift liquid remover

Abstract

A platform gas lift liquid remover comprises an air inlet pipe, a liquid separation gate, a liquid separation cage, a liquid discharge tank and an exhaust hood. The liquid separation grids, the liquid discharge tank and the exhaust hood are connected through bolts, the number of the liquid separation grids is six, the liquid separation grids are circumferentially arranged, and the outer side of the binding face is sealed through glue. Air flow with liquid taken from a wellhead enters the liquid separation gate and the liquid separation cage at a high speed through the air inlet pipe, then passes through the peek resin ball to complete liquid separation and is discharged through the exhaust hood, and most separated liquid enters the liquid discharge tank through the liquid separation gate. The device is small in size, simple in installation structure and suitable for an offshore platform.

Description

Technical Field

[0001] The utility model relates to a platform gas lift deliquator, in particular to a device installed on an offshore platform and used for gas-liquid separation in a gas lift process. Background Art

[0002] my country's offshore oil and gas production projects have been advanced for decades, and some gas fields have experienced a drop in gas pressure and water accumulation at the bottom of the well. In order to ensure the smooth development of the gas field, gas lift is usually used to ensure production.

[0003] The gas lift process removes liquid from part of the gas source taken from the wellhead, and then sends it to the compressor and then pumps it into the well. The gas-liquid separators currently used in my country's oil fields are large in size and are not suitable for installation on offshore platforms.

[0004] It is very necessary to study a deliquidator that is small in size and easy to install and maintain on an offshore platform. Summary of the invention

[0005] In order to solve the problem of incompatibility of a deliquidator installed on an offshore platform, the utility model proposes a platform gas lift deliquidator, which is small in size, convenient to install on an offshore platform, and simple to install and maintain.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model includes an air inlet pipe, a liquid separator grid, a liquid separator cage, a liquid drain tank, and an exhaust hood. The liquid separator grid, the liquid drain tank, and the exhaust hood are connected by bolts. There are 6 liquid separator grids, which are arranged in a circle, and the outer side of the fitting surface is sealed with glue. The liquid separator grid and the liquid separator cage are filled with peek resin balls. The liquid-carrying air flow taken from the wellhead enters at high speed through the air inlet pipe, enters the liquid separator grid and the liquid separator cage, and then passes through the peek resin balls to complete the deliquescence, and is discharged from the exhaust hood. Most of the detached liquid enters the liquid drain tank from the liquid separator grid.

[0007] The beneficial effects of the utility model are as follows: the device of the utility model has a small volume, a simple installation structure, and is suitable for offshore platforms. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is the air inlet pipe of the utility model.

[0009] Figure 2 This is the liquid separation grid of the utility model.

[0010] Figure 3 This is a bottom view of the liquid separation grid of the utility model.

[0011] Figure 4 The utility model is a liquid separation cage.

[0012] Figure 5 This is a bottom view of the liquid separation cage of the utility model.

[0013] Figure 6 The utility model is a liquid discharge tank.

[0014] Figure 7 The utility model is an exhaust hood.

[0015] Figure 8 This is the assembly diagram of the separator grid.

[0016] Fig. 9 Schematic diagram of the assembly position of the separation cage.

[0017] Fig.10 This is the general assembly drawing.

[0018] Among them, 1. air inlet pipe, 101. air inlet pipe mixing plate, 2. liquid separator, 201. outer exhaust grille, 202. inner air inlet grille, 203. upper exhaust grille, 204. liquid separator lifting ear, 205. bearing support arm, 206. liquid retaining ring, 207. lower liquid discharge grille, 208. liquid separator side 3. liquid separator cage, 301. exhaust top cover, 302. liquid separator cage lifting ear, 303. side liquid discharge surface, 304. bottom air inlet surface, 4. liquid discharge tank, 401. air inlet pipe opening, 402. liquid discharge tank bolt seat, 5. exhaust hood, 501. exhaust hood bolt seat. DETAILED DESCRIPTION

[0019] Depend on Figure 1 The air inlet pipe 1 shown in the figure has an air inlet pipe mixing plate 101 at the top and a flange at the bottom to connect with other pipe structures.

[0020] Depend on Figure 2 , 3 As shown, the main body of the liquid separator 2 is an arc structure, which includes an outer exhaust grille 201, an inner air inlet grille 202, an upper exhaust grille 203, and a lower liquid discharge grille 207, which is a grille or a uniformly distributed through-hole structure for gas and liquid circulation. The two sides of the main body are the liquid separator side 208, and the top of the liquid separator is provided with a liquid separator lifting lug 204. The lower part of the liquid retaining ring 206 is connected to the arc plate structure, and the outer side of the plate structure has a bearing arm 205, which has 2 bolt holes, and the inner bolt hole is longer. During assembly, the uppermost grille of the outer exhaust grille 201 is welded separately, and before welding, the internal space formed by the outer exhaust grille 201, the inner air inlet grille 202, the upper exhaust grille 203, the lower liquid discharge grille 207, and the liquid separator side 208 is filled with peek resin balls, and the diameter of the resin balls is not less than 2 cm.

[0021] Depend on Figure 4 , 5As shown, the main body of the liquid separation cage 3 is a pancake-shaped structure, including three parts: an exhaust top cover 301, a side liquid discharge surface 303, and a bottom air inlet surface 304. The above three parts all have holes for gas and liquid to flow. The liquid separation cage hanging ears 302 are welded around the exhaust top cover 301. When assembling, the side liquid discharge surface 303 and the bottom air inlet surface 304 are first welded and connected, and peek resin balls are filled in the formed basin-shaped container, and the diameter of the resin balls is not less than 2 cm. Then the exhaust top cover 301 is welded and installed.

[0022] Depend on Figure 6 As shown, the drain tank 4 is composed of a cylindrical structure and an oblique cone structure, an air inlet port 401 is arranged on the oblique cone structure, and a drain tank bolt seat 402 is arranged on the top of the cylindrical structure.

[0023] Depend on Figure 7 As shown, an exhaust hood bolt seat 501 is provided at the lower portion of the exhaust hood 5 .

[0024] During assembly, the above components are transported by transport ships to the offshore platform for assembly.

[0025] Depend on Figure 2 , 3 As shown in FIGS. 8 and 9, when assembling the liquid separator 2, six liquid separators 2 are arranged in a circle, the sides 208 of the liquid separators are fitted to each other, and the fitting positions of the liquid retaining rings 206 of adjacent liquid separators 2 are sealed with glue, and the glued position extends downward to the bottom of the fitting seam of the liquid separator side 208. Then the liquid separator 2 assembly is hoisted through the liquid separator lifting ears 204, and the bolt holes on the outside of the bearing support arms 205 are connected to the platform deck support structure and locked with bolts.

[0026] Then install the liquid separator cage 3, and hoist the liquid separator cage 3 to the top of the structure composed of 6 liquid separator grids 2 through the liquid separator cage lifting ear 302. When it is at the bottom, the liquid separator cage lifting ear 302 is placed between the liquid separator grid lifting ears 204 of the adjacent liquid separator grids 2, and lowered until the side liquid discharge surface 303 and the upper exhaust grid 203 are in contact, at which time the liquid separator cage lifting ear 302 is located between two liquid separator grid lifting ears 204. Use bolts to connect and fix the liquid separator cage lifting ear 302 to the liquid separator grid lifting ears 204 of two adjacent liquid separator grids 2.

[0027] After completing the above steps, assemble the air inlet duct 1, the drain tank 4, and the exhaust hood 5.

[0028] Depend on Figure 1 , 2 , 3, 4, 5, 6, 7, 8, 9, and 10.

[0029] The exhaust hood 5 is hoisted, and the bottom circular surface of the exhaust hood 5 is placed inside the liquid retaining ring 206 , and the exhaust hood bolt seat 501 corresponds to the bearing support arm 205 .

[0030] Then, the drain tank 4 is hoisted, and the drain tank bolt seat 402 is aligned with the bearing arm 205 , and the exhaust hood bolt seat 501 , the inner bolt hole of the bearing arm 205 , and the drain tank bolt seat 402 are connected and fixed by bolts.

[0031] After completing the above steps, the air inlet pipe 1 is inserted into the drain tank 4 from the air inlet pipe opening 401 until the air inlet pipe mixing plate 101 is above the plane where the lower drain grid 207 is located.

[0032] Apply glue to seal the air inlet pipe 1 and the air inlet pipe opening 401.

[0033] The flange below the air inlet pipe 1 is connected to the gas production pipeline, and the liquid-carrying production air flow from the wellhead enters therefrom.

[0034] The outlet below the drain tank 4 is connected to a drain pipe, through which the separated liquid is discharged.

[0035] During operation, the wellhead airflow enters the air inlet pipe 1 at high speed. When flowing through the air inlet pipe mixing plate 101, part of the airflow is discharged in the circumferential direction and meets the rising airflow along the wall of the air inlet pipe 1. The airflow is disturbed here and the impact force is weakened. When disturbed, part of the liquid is separated and falls into the drainage tank 4.

[0036] After leaving the air inlet pipe 1, the airflow enters the inner air inlet grid 202, the lower liquid discharge grid 207, and the bottom air inlet surface 304, and flows through the gap between the peek resin balls inside the liquid separation grid 2 and the liquid separation cage 3. During the flow, the liquid hits the peek resin balls and is separated from the gas. The gas after deliquescence is discharged upward from the air holes on the outer exhaust grid 201 and the exhaust top cover 301. Affected by the wind pressure, a small part of the liquid separated in the liquid separation cage 3 flows out from the bottom air inlet surface 304, and most of it flows into the upper exhaust grid 203 from the side liquid discharge surface 303, and flows into the drainage tank 4 from the lower liquid discharge grid 207 together with the liquid separated in the liquid separation grid 2.

[0037] For gas wells with low viscosity of the liquid carried, the utility model device can meet the use requirements of the gas field throughout its life cycle. The peek resin material has a long life, high hardness, good corrosion resistance, and can cope with the impact of high-speed particle impurities. When the viscosity of the liquid carried by the airflow is high, attention should be paid to the pressure difference between the air inlet pipe 1 and the exhaust hood 5. When the pressure difference increases, the peek resin balls inside the liquid separation grid 2 and the liquid separation cage 3 should be replaced in time.

Claims

1. A platform gas lift deliquifier, comprising an air inlet pipe (1), characterized in that: It comprises a liquid separation grid (2), a liquid separation cage (3), a liquid discharge tank (4), and an exhaust hood (5); The liquid separation grid (2), the liquid drain tank (4), and the exhaust hood (5) are connected by bolts; The number of the liquid separation grids (2) is 6, which are arranged in a circle, and the outer sides of the fitting surfaces are sealed with glue; The liquid separation grid (2) and the liquid separation cage (3) are filled with peek resin balls.

2. A platform gas lift deliquifier according to claim 1, characterized in that: The liquid separation grid (2) comprises an outer air exhaust grid (201), an inner air inlet grid (202), an upper air exhaust grid (203), a liquid separation grid lifting ear (204), a bearing support arm (205), a liquid retaining ring (206), a lower liquid discharge grid (207), and a liquid separation grid side surface (208).

3. The platform gas lift deliquifier according to claim 1, characterized in that: The liquid separation cage (3) comprises an exhaust top cover (301), a liquid separation cage lifting ear (302), a side liquid discharge surface (303), and a bottom air inlet surface (304).

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