Small gas lift liquid removal supercharger

Abstract

A small-sized gas lift liquid removal supercharger comprises an air supply outlet, a centrifugal rotor, an exhaust outlet, a base bowl and a filter screen. The centrifugal rotor is driven by an external power mechanism to rotate, airflow taken from a wellhead is discharged from the air outlet after liquid removal, and the separated liquid is discharged from the base bowl. The device is small in occupied space, easy to assemble and low in installation cost.

Description

Technical Field

[0001] This utility model relates to a small gas lift dehydration booster, specifically a booster with gas-liquid separation function used in oilfield gas lift processes. Background Technology

[0002] During the oilfield's development lifecycle, as it enters the middle and later stages of development, the formation pressure decreases, necessitating the use of gas lift technology to maintain production.

[0003] Gas lift technology involves injecting high-pressure gas into the wellbore to push liquids, such as crude oil or natural gas, from the reservoir into the tubing and raise them to the surface. This method is particularly suitable for situations where the reservoir energy is insufficient to sustain a flowing well.

[0004] The high-pressure gas used in the gas lift process is recycled and reused. It needs to be dehydrated and pressurized during the process of being taken out of the wellhead and sent back downhole. The related processing equipment is relatively complex and larger in size, which makes transportation and installation difficult. Utility Model Content

[0005] To address the aforementioned problems, this invention proposes a small-scale air-lift dehydration booster. This device can be assembled from a few simple parts, making installation relatively simple and cost-effective.

[0006] The technical solution proposed by this utility model to solve its technical problem is as follows: The device of this utility model includes an air inlet, a centrifugal rotor, an air outlet, a base bowl, and a filter screen. The filter screen is arranged at the fixing hole position on the inner support of the base bowl; the inner support ring of the centrifugal rotor is fitted with the inner support ring of the base bowl, and the outer support ring of the centrifugal rotor is fitted with the outer support of the base bowl; the fixing ring of the air outlet covers the outer side of the outer cylinder of the centrifugal rotor, and the hole of the inner cylinder is fitted with the outer wall of the inner cylinder of the centrifugal rotor; the supporting shoulder of the air outlet abuts against the top of the air inlet of the centrifugal rotor, and the connecting pipe of the air outlet is fitted with the air inlet of the centrifugal rotor; the mating surfaces of the inner support ring of the base bowl and the inner support ring of the centrifugal rotor, the mating surfaces of the outer support of the base bowl and the outer support ring of the centrifugal rotor, the mating surfaces of the outer cylinder of the centrifugal rotor and the fixing ring of the air outlet, and the mating surfaces of the connecting pipe of the air outlet, the supporting shoulder of the air outlet and the air inlet of the centrifugal rotor are all coated with grease.

[0007] The beneficial effects of this utility model are: the device occupies little space, is easy to assemble, is suitable for complex terrain environments, and helps to reduce installation costs. Attached Figure Description

[0008] Figure 1 This is a cross-sectional view of the air outlet of this utility model.

[0009] Figure 2 This is a cross-sectional view of the centrifugal rotor of this utility model.

[0010] Figure 3This is the exhaust vent of this utility model.

[0011] Figure 4 This utility model relates to a base bowl.

[0012] Figure 5 This is an assembly cross-sectional view of the present utility model.

[0013] Figure 6 This is an assembly drawing of the present utility model.

[0014] Among them, 1. Air outlet, 1-1. Air outlet connecting pipe, 1-2. Air outlet support shoulder, 2. Centrifugal rotor, 2-1. Centrifugal rotor air inlet, 2-2. Air inlet bracket, 2-3. Power shaft, 2-4. Centrifugal rotor inner cylinder, 2-5. Liquid removal screw blade, 2-6. Centrifugal rotor outer cylinder, 2-7. Secondary air supply blade, 2-8. Liquid removal screw blade leakage hole, 2-9. Centrifugal rotor outer cone, 2-10. Primary air supply blade, 2-11. Centrifugal rotor inner cone, 2-12. Centrifugal rotor inner support ring, 2-13. Centrifugal rotor outer support ring, 3. Exhaust outlet, 3-1. Inner cylinder hole, 3-2. Exhaust outlet fixing ring, 3-3. Exhaust pipe, 4. Base bowl. 4-1. Inner support ring of base bowl; 4-2. Inner support of base bowl; 4-3. Outer support of base bowl; 4-4. Inner bracket of base bowl; 4-5. Outer bracket of base bowl; 4-6. Drainage port of base bowl; 5. Filter screen. Detailed Implementation

[0015] Depend on Figure 1 The air outlet 1 shown has a flared air outlet connecting pipe 1-1 at the bottom, and an air outlet support shoulder 1-2 on the inner side. There is a triangular reinforcing plate on the outer side of the joint between the air outlet connecting pipe 1-1 and the upper cylinder, which serves to strengthen the structure.

[0016] Depend on Figure 2As shown, the main structure of the centrifugal rotor 2 is a cylindrical inner cylinder 2-4, connected below by a conical inner cone cylinder 2-11. Outside the inner cylinder 2-4 is an outer cylinder 2-6, connected below by an outer cone cylinder 2-9. Above the inner cylinder 2-4 is the centrifugal rotor air inlet 2-1, which is conical in shape. Its inner side has an air inlet support 2-2 for structural reinforcement, and its outer side has a power shaft 2-3, which is the connection point for the rotating belt. Inside the inner cylinder 2-4 is a spiral-structured desiccant blade 2-5, extending from the upper part of the inner cylinder 2-4 to the middle of the inner cone cylinder 2-11. The lower part of the desiccant blade 2-5 has a desiccant drain hole 2-8. Between the inner cylinder 2-4 and the outer cylinder 2-6 are secondary air supply blades 2-7; between the inner cone cylinder 2-11 and the outer cone cylinder 2-9 are primary air supply blades 2-10. Near the middle of the inner cone 2-11 of the centrifugal rotor is an inner support ring 2-12, which is a ring-shaped support structure welded to the inner cone 2-11 of the centrifugal rotor. At the end of the outer cone 2-9 of the centrifugal rotor is an outer support ring 2-13, which has reinforcing ribs between it and the outer cone 2-9 of the centrifugal rotor to strengthen the structure.

[0017] Depend on Figure 3 As shown, the upper part of the exhaust port 3 has an exhaust pipe 3-3, and the bottom has an exhaust port fixing ring 3-2. The two parts are connected by a pipe, and the pipe part has an inner cylinder hole 3-1.

[0018] Depend on Figure 4 , 5 As shown, the main structure of the base bowl 4, the outer support 4-3, is a bowl-shaped structure. An inner support 4-2 connects to its bottom, and an inner bracket 4-4 connects the inner support 4-2 and the outer support 4-3. The inner bracket 4-4 has fixing holes for fixing the filter screen 5. The top of the inner support 4-2 has an inner support ring 4-1, which supports other structures. On the outer side of the outer support 4-3, corresponding to the inner bracket 4-4, is an outer bracket 4-5, which provides support and structural reinforcement. The bottom of the outer support 4-3 has a drain port 4-6, connecting the inner and outer sides of the outer support 4-3 from the bottom.

[0019] Depend on Figure 1 , 2 As shown in 3, 4, 5, and 6.

[0020] During assembly, the base bowl 4 is first transported to the designated position, and the filter screen 5 is arranged in the fixing holes on the inner support 4-4 of the base bowl. The centrifugal rotor 2 is hoisted until the inner support ring 2-12 of the centrifugal rotor is in contact with the inner support ring 4-1 of the base bowl, and the outer support ring 2-13 of the centrifugal rotor is in contact with the outer support 4-3 of the base bowl. At this time, the centrifugal rotor 2 can rotate on the base bowl 4. The exhaust port 3 is hoisted from above, and the inner cylinder 2-4 of the centrifugal rotor passes through the inner cylinder hole 3-1 to the bottom of the exhaust port 3 and is in contact with the top of the outer cylinder 2-6 of the centrifugal rotor. At this time, the exhaust port fixing ring 3-2 covers the outside of the outer cylinder 2-6 of the centrifugal rotor, and the inner cylinder hole 3-1 is in contact with the outer wall of the inner cylinder 2-4 of the centrifugal rotor. Finally, the air inlet 1 is installed until the air inlet support shoulder 1-2 abuts against the top of the air inlet 2-1 of the centrifugal rotor. At this time, the air inlet connecting pipe 1-1 is in contact with the air inlet 2-1 of the centrifugal rotor.

[0021] After completing the above steps, connect the upper part of the air inlet 1 to the liquid-containing gas pipeline so that the airflow taken from the wellhead can enter the air inlet 1. Connect the exhaust pipe 3-3 to the next process flow device so that the dehydrated and pressurized gas can flow out from there. Finally, put the drive belt on the power shaft 2-3 so that the external power system can drive the centrifugal rotor 2 to rotate. During installation, apply grease to the mating surfaces of the inner support ring 4-1 of the base bowl, the inner support ring 2-12 of the centrifugal rotor, the outer support 4-3 of the base bowl, the outer support ring 2-13 of the centrifugal rotor, the outer cylinder 2-6 of the centrifugal rotor, the exhaust port fixing ring 3-2, the air inlet connecting pipe 1-1, the air inlet support shoulder 1-2, and the centrifugal rotor air inlet 2-1. This provides both lubrication and sealing.

[0022] When this device is in operation, the transmission belt drives the power shaft 2-3 under the drive of the external transmission device, causing the centrifugal rotor 2 to rotate at high speed. The airflow taken from the wellhead enters the air inlet 2-1 of the centrifugal rotor through the air outlet 1 and flows downward along the desliming screw 2-5. During the rotation, due to centrifugal force, the liquid carried by the airflow adheres to the desliming screw 2-5 and the inner wall of the centrifugal rotor inner cylinder 2-4. As the airflow rotates and flows along the desliming screw 2-5, more and more liquid is separated. At the lower part of the desliming screw 2-5, the liquid can fall directly into the next layer through the desliming screw drain hole 2-8 and finally fall into the base bowl 4. The liquid falling into the base bowl 4 is discharged through the base bowl drain port 4-6.

[0023] The airflow leaving the dehydration screw 2-5 flows from the inside of the base bowl support 4-2 to the outside. As it passes through the filter screen 5, small droplets are filtered out, and the airflow is then drawn into the primary air supply blade 2-10. The primary air supply blade 2-10 draws in the airflow and pressurizes it. Further pressurization occurs when the airflow reaches the secondary air supply blade 2-7, completing the pressurization of the dehydration airflow. After being pressurized by the secondary air supply blade 2-7, the airflow enters the exhaust port 3 and flows out through the exhaust pipe 3-3 into the next process flow.

[0024] During operation, the main liquid removal process is completed in the liquid removal screw 2-5, and the filter screen 5 intercepts the small droplets remaining in the airflow.

Claims

1. A small air-lift dehydration booster, characterized in that, It includes an air inlet (1), a centrifugal rotor (2), an air outlet (3), a base bowl (4), and a filter screen (5); The air outlet (1) includes an air outlet connecting pipe (1-1) and an air outlet supporting shoulder (1-2). The centrifugal rotor (2) includes a centrifugal rotor air inlet (2-1), an air inlet bracket (2-2), a power shaft (2-3), a centrifugal rotor inner cylinder (2-4), a liquid removal screw (2-5), a centrifugal rotor outer cylinder (2-6), a secondary air supply blade (2-7), a liquid removal screw leakage hole (2-8), a centrifugal rotor outer cone (2-9), a primary air supply blade (2-10), a centrifugal rotor inner cone (2-11), a centrifugal rotor inner support ring (2-12), and a centrifugal rotor outer support ring (2-13). The exhaust port (3) includes an inner cylinder hole (3-1), an exhaust port fixing ring (3-2), and an exhaust pipe (3-3); The base bowl (4) includes an inner support ring (4-1), an inner support (4-2), an outer support (4-3), an inner bracket (4-4), and an outer bracket (4-5). The filter screen (5) is arranged at the fixing hole position on the bracket (4-4) inside the base bowl; The inner support ring (2-12) of the centrifugal rotor is fitted with the inner support ring (4-1) of the base bowl, and the outer support ring (2-13) of the centrifugal rotor is fitted with the outer support (4-3) of the base bowl; The exhaust port fixing ring (3-2) covers the outside of the centrifugal rotor outer cylinder (2-6), and the inner cylinder hole (3-1) fits against the outer wall of the centrifugal rotor inner cylinder (2-4); The air outlet support shoulder (1-2) abuts against the top of the centrifugal rotor air inlet (2-1), and the air outlet connecting pipe (1-1) fits against the centrifugal rotor air inlet (2-1); The mating surfaces of the inner support ring (4-1) of the base bowl, the inner support ring (2-12) of the centrifugal rotor, the mating surfaces of the outer support (4-3) of the base bowl, the outer support ring (2-13) of the centrifugal rotor, the mating surfaces of the outer cylinder (2-6) of the centrifugal rotor, the exhaust port fixing ring (3-2), the air supply port connecting pipe (1-1), the air supply port support shoulder (1-2), and the air inlet (2-1) of the centrifugal rotor are all coated with grease.

2. The small air-lift dehydrator and booster compressor according to claim 1, characterized in that, The liquid drain hole (2-8) of the liquid draining screw is located at the lower part of the liquid draining screw (2-5).

3. A small air-lift dehydrator and booster compressor according to claim 1, characterized in that, The inner support (4-4) of the base bowl has fixing holes; the inner support (4-4) of the base bowl corresponds to the outer support (4-5) of the base bowl.

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