High-flux gas well gas-liquid separator for gas lift

Abstract

A high-flux gas well gas-liquid separator for gas lift comprises a liquid separating pipe frame, a washing tank, a liquid discharging tank and an exhaust hood, the washing tank, the liquid discharging tank and the exhaust hood are connected through bolts, gaps at the connecting positions are sealed through glue, and the liquid separating pipe frame is supported by an outer support upper support and liquid discharging tank supporting legs. Air flow from a well mouth enters at a high speed, and after liquid is removed in the washing tank, gas is discharged by the exhaust hood, and liquid is discharged by the liquid discharge tank. The device allows wellhead airflow to enter at a high speed, and is small in size, compact in structure and suitable for working environments with limited space.

Description

Technical Field

[0001] The utility model relates to a high-throughput gas well gas-liquid separator for gas lift, in particular to a high-throughput separator which is arranged on an offshore platform and takes out a gas source from an underwater wellhead for gas-liquid separation. Background Art

[0002] With the vigorous development of my country's marine engineering, the development of offshore gas fields has gradually advanced. Offshore gas production platforms, as a key component of offshore gas field production, are often constrained by limited space. While still meeting production requirements, the space occupied by each device and equipment must be minimized.

[0003] During offshore gas field production, reservoir condensate or formation water often enters the wellbore, forming liquid accumulation, which can affect gas production. Gas lift dewatering and gas recovery is an effective solution to this problem. Adding a compact, space-efficient gas lift system to the limited space of offshore platforms is the key to solving the problem. Summary of the Invention

[0004] In order to address the problem of limited space in the operating environment, the utility model proposes a high-throughput gas-liquid separator for gas lift. The separator allows high-speed entry of wellhead airflow, completes liquid removal during high-speed flow, and occupies a small space.

[0005] The technical solution adopted by the present invention to solve the technical problems is as follows: the present invention includes a liquid separation pipe rack, a washing tank, a drain tank, and an exhaust hood. The washing tank, drain tank, and exhaust hood are connected by bolts, and the gaps at the connection are sealed with glue. The liquid separation pipe rack is supported by the upper support of the external bracket and the drain tank support legs. The airflow from the wellhead enters the air inlet pipe at high speed, flows rapidly through the spiral liquid separation plate, and flings the carried liquid toward the guide corrugations and thus guides it into the drain tank below. After the airflow is deliquescent, it flows upward along the rectifying plate and out of the exhaust hood. The separated liquid is discharged through the drain tank.

[0006] The beneficial effects of the utility model are as follows: the utility model has a compact structure, occupies a small space, and allows liquid removal to be completed in a high-speed passing state. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 、 2 The utility model is a liquid dispensing tube rack.

[0008] Figure 3 This is a washing tank of the utility model.

[0009] Figure 4 This is a new type of liquid drainage tank.

[0010] Figure 5 The utility model is an exhaust hood.

[0011] Figure 6 This is assembly step 1 of the present invention.

[0012] Figure 7 This is a schematic diagram of the utility model after assembly is completed.

[0013] Among them, 1, liquid distribution pipe rack, 1-1, air inlet pipe, 1-2, liquid distribution plate, 1-3, upper leg, 1-4, upper foot, 1-5, inner straightening ring, 1-6, outer straightening ring, 1-7, lower leg, 1-8, lower foot, 1-9, straightening plate, 1-10, baffle, 1-11, guide ring, 2, washing tank, 2-1, washing drum, 2-2, air inlet pipe seat, 2-3, guide corrugation, 2-4, outer bracket, 2-5 , upper support of the outer bracket, 2-6, washing tank flange, 2-7, washing tank fastening seat, 3, drain tank, 3-1, drain tank flange, 3-2, drain tank support foot, 3-3, drain tank support foot bracket, 3-4, drain tank cylinder, 3-5, drain tank bracket, 3-6, drain port, 4, exhaust hood, 4-1, hood cylinder, 4-2, exhaust hood flange, 4-3, exhaust hood fastening seat, 4-4, air inlet pipe hole, 4-5, upper leg hole. DETAILED DESCRIPTION

[0014] Depend on Figure 1 、 2 As shown, the main body of the liquid separation tube rack 1 is a liquid separation plate 1-2, which is a spiral plate structure, and the upper part is connected to the air inlet pipe 1-1. The spiral liquid separation plate 1-2 has a baffle 1-10 in the center, which is a certain distance away from the liquid separation plate 1-2 below. The rectifier plate 1-9 is a cross plate structure, which runs from the top to the bottom and is welded to the baffle 1-10. The guide ring 1-11 is located at the outer edge of the liquid separation plate 1-2. The bottom of the rectifier plate 1-9 is connected to the lower support leg 1-7, and the end thereof has a lower support foot 1-8. The top of the rectifier plate 1-9 is connected to the upper support leg 1-3, and the end thereof has an upper support foot 1-4. The air inlet pipe 1-1 is connected to the adjacent upper support leg 1-3 by reinforcing ribs to increase the structural strength. There is an inner rectifying ring 1-5 at the connection position of the rectifying plate 1-9 and the upper supporting leg 1-3; there is an outer rectifying ring 1-6 on the upper supporting leg 1-3, the main body of which is a cylinder and the upper part is a conical structure.

[0015] Depend on Figure 3As shown, the main washing drum 2-1 of the washing tank 2 is a cylindrical structure, with guide corrugations 2-3 evenly distributed on the inside. The guide corrugations 2-3 are formed by spiral steel bars arranged in a circle. There is an air inlet pipe seat 2-2 at the top of the washing drum 2-1. There are steel rings in the upper, middle and lower parts of the washing drum 2-1 to increase the structural strength, and an enlarged reinforcing steel plate is arranged below the air inlet pipe seat 2-2. There are four outer brackets 2-4 on the outside of the washing drum 2-1, and an outer bracket upper support 2-5 is provided on the top, and the connection position is supported by reinforcing ribs. There is a washing tank flange 2-6 at the bottom of the washing drum 2-1, which is connected to the outer bracket 2-4 and the bottom reinforcing steel ring with reinforcing ribs. There are washing tank fastening seats 2-7 on both sides of the upper part of the outer bracket 2-4, which are connected to the reinforcing steel ring at the top.

[0016] Depend on Figure 4 As shown, the main body of the drain tank 3, the drain tank tube 3-4, is made of plastic and is provided with four protruding structures to increase the volume, one of which has a drain port 3-6. The drain tank bracket 3-5 is the supporting structure of the drain tank tube 3-4, and includes an I-beam welded to the bottom and the outside of the drain tank tube 3-4. The drain tank tube 3-4 is slotted at the top, and the drain tank support leg bracket 3-3 passes through the slot and is welded to the drain tank bracket 3-5, and the gap at the slot is filled with glue. The drain tank support leg 3-2 is provided at the base of the drain tank support leg bracket 3-3, and the drain tank support leg bracket 3-3 is welded to the intersection. The drain tank flange 3-1 is welded and fixed to the drain tank bracket 3-5.

[0017] Depend on Figure 5 As shown, the main body of the exhaust hood 4 is a conical structure, and the lower part is a cylindrical structure, including an exhaust hood fastening seat 4-3, an air inlet pipe hole 4-4, and an upper leg hole 4-5. The upper part of the hood 4-1 is an exhaust hood flange 4-2.

[0018] Depend on Figure 1 、 2 , 3, 4, 5, 6, and 7.

[0019] During assembly, first place the drain tank 3 at the designated position, hoist the washing tank 2, and make the outer bracket 2-4 correspond to the drain tank bracket 3-5 respectively. Then, connect the washing tank flange 2-6 to the drain tank flange 3-1 by bolts.

[0020] Then, the liquid distribution pipe rack 1 is hoisted and lowered through the washing tank 2, and the lower support leg 1-8 is placed on the drain tank support leg 3-2. At the same time, the upper support leg 1-4 is supported on the upper support 2-5 of the outer bracket. At this time, the air inlet pipe 1-1 is supported by the air inlet pipe seat 2-2.

[0021] After completing the above steps, place the exhaust hood 4 on the washing tank 2, the air inlet pipe 1-1 passes through the air inlet pipe hole 4-4, the upper leg hole 4-5 is clamped on the upper leg 1-3, and the exhaust hood fastening seat 4-3 and the washing tank fastening seat 2-7 are fixed by bolts.

[0022] During the assembly process, the gap between the air inlet pipe 1-1 and the air inlet pipe hole 4-4 and the air inlet pipe seat 2-2 is sealed with glue; the gap between the upper leg hole 4-5 and the upper leg 1-3 is sealed with glue; the contact surface between the exhaust hood 4 and the top of the washing tank 2 is sealed with glue; the contact surface between the washing tank flange 2-6 and the drain tank flange 3-1 is sealed with glue.

[0023] During use, the gas source from the wellhead does not need to be decelerated or buffered. It enters the air inlet pipe 1-1 at high speed and impacts the inner wall of the washing barrel 2-1. The airflow will spiral forward under the separator plate 1-2, and the guide corrugation 2-3 will guide the liquid thrown on the inner wall of the washing barrel 2-1 downward. During the spiral forward movement of the airflow, the guide ring 1-11 will guide the airflow rushing to the edge of the separator plate 1-2 downward, but a small amount of airflow is allowed to flow upward from the gap between the guide ring 1-11, the inner wall of the washing barrel 2-1, and the guide corrugation 2-3. During the spiral forward movement of the airflow, a small amount of airflow is allowed to overflow from the gap between the baffle 1-10 and the lower separator plate 1-2 and flow upward, thereby greatly reducing the liquid content of the outflowing airflow, especially the gap below the separator tube rack 1. Most of the airflow will reach the lowest separator plate 1-2 and flow upward along the rectifier plate 1-9. The rectifying plate 1-9, the upper support leg 1-3, the inner rectifying ring 1-5 and the outer rectifying ring 1-6 change the flow state of the deliquidated air flow from a rotating flow to a flow state mainly of a vertical upward flow during the upward flow process, so that the air flow can stably leave the exhaust hood 4.

[0024] The high-speed airflow passing through the guide corrugations 2-3 will form turbulence, during which liquid will be separated and fall on the separator plate 1-2. The center of the separator plate 1-2 is close to the baffle 1-10 and is higher than the edge guide ring 1-11. The separated liquid will flow downward from the edge of the separator plate 1-2 along the guide corrugations 2-3.

[0025] The separated liquid flows downward along the guide corrugation 2-3 into the drainage tank 3. Due to the large flow rate of circulating air and the large amount of liquid produced, the drainage tank 3 is only used as a temporary storage container. The drainage port 3-6 should be kept open to ensure that the liquid level does not exceed the drainage tank 3.

Claims

1. A high-throughput gas-liquid separator for gas lift, characterized by: It comprises a liquid dispensing tube rack (1), a washing tank (2), a liquid draining tank (3), and an exhaust hood (4); The washing tank (2), the drain tank (3), and the exhaust hood (4) are connected by bolts, and the gaps at the connection positions are sealed with glue; The liquid dispensing tube rack (1) is supported by an outer bracket upper support (2-5) and a liquid drain tank support leg (3-2); The liquid separation tube rack (1) comprises a liquid separation plate (1-2), an upper support leg (1-3), an upper support foot (1-4), an inner rectifying ring (1-5), an outer rectifying ring (1-6), a lower support leg (1-7), a lower support foot (1-8), a rectifying plate (1-9), a baffle (1-10), and a guide ring (1-11); The liquid separation plate (1-2) is a spiral plate structure; the rectifying plate (1-9) is a cross plate structure, which is welded to the baffle plate (1-10); the guide ring (1-11) is located at the outer edge of the liquid separation plate (1-2); the bottom of the rectifying plate (1-9) is connected to a lower support leg (1-7), the end of which is provided with a lower support foot (1-8); the top of the rectifying plate (1-9) is connected to an upper support leg (1-3), the end of which is provided with an upper support foot (1-4); an inner rectifying ring (1-5) is provided at the connection position between the rectifying plate (1-9) and the upper support leg (1-3); the main body of the outer rectifying ring (1-6) is a cylinder, and the upper part is a conical structure; The washing tank (2) comprises a guide corrugation (2-3) and an outer bracket upper support (2-5); The guide corrugations (2-3) are formed by spiral steel bars arranged circumferentially; The drainage tank (3) comprises a drainage tank flange (3-1), a drainage tank support foot (3-2), a drainage tank support foot support frame (3-3), a drainage tank cylinder (3-4), and a drainage tank bracket (3-5); The drain tank barrel (3-4) is made of plastic and is provided with four protruding structures; the drain tank bracket (3-5) is a supporting structure of the drain tank barrel (3-4); a groove is formed on the upper portion of the drain tank barrel (3-4); the drain tank support leg bracket (3-3) passes through the groove and is welded to the drain tank bracket (3-5); the gap at the groove position is filled with glue; a drain tank support leg (3-2) is provided at the root of the drain tank support leg bracket (3-3), and the drain tank support leg bracket (3-3) is welded to each other at an intersection position; the drain tank flange (3-1) is welded and fixed to the drain tank bracket (3-5).

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