Portable compressor for gas lift

Abstract

A portable compressor for gas lift comprises a forced separation rotor, a gas-liquid separation box, an exhaust box, a motor module and a frame. The whole device is assembled in the frame, the forced separation rotor is installed in the gas-liquid separation box, and the exhaust box is installed to form an exhaust channel. Airflow taken from a wellhead enters the gas-liquid separation box for preliminary separation, then is further subjected to liquid removal and pressurization in the forced separation rotor rotating at a high speed, and finally is exhausted through the exhaust box. The device is simple in assembly structure and low in transportation and installation operation cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a portable compressor for gas lift, in particular to a compressor for gas lift which can be transported integrally by vehicles and arranged quickly in oilfield operation environment. BACKGROUND

[0002] In the oilfield exploitation process, the production rate will decrease due to the decrease of formation pressure, and the gas lift process is often used to improve the oilfield production rate when this situation occurs.

[0003] In some cases, the oil well is arranged in a complex terrain environment, and there is no space reserved for installing the gas lift device during construction, and transporting the current general gas lift device to this place also has problems such as high transportation cost and high operation difficulty. SUMMARY

[0004] To solve the above problems, the utility model provides a portable compressor for gas lift, which has simple assembly operation requirements and can be transported integrally by vehicles, and has low site arrangement cost.

[0005] The technical scheme provided by the utility model to solve its technical problems is: the utility model discloses a forced separation rotor, a gas-liquid separation tank, and an exhaust tank.

[0006] The forced separation rotor comprises an upper cone disc, an upper centrifugal spiral, a lower centrifugal spiral, a lower cone disc, a power blade, a lower cone disc support, a transmission shaft, a rotor liquid discharge port and a rotor bottom support ring. The gas-liquid separation tank comprises an air inlet, a separation tank partition plate, a liquid storage tank, a rotor tank, a separation tank locking plate, a liquid discharge pipe, a rotor hole, a rectifier plate and a limiting ring. The exhaust tank comprises an exhaust tank locking plate, an exhaust tank shell and an exhaust port.

[0007] The forced separation rotor is assembled to the rotor tank. The transmission shaft passes through the rotor hole. The rotor bottom support ring is attached to the bottom of the rotor tank after a sealing ring is installed. The outer edge of the upper cone disc is attached to the limiting ring and the inner wall of the rotor tank. The exhaust tank locking plate is attached to the separation tank locking plate and connected by bolts.

[0008] The utility model has the advantages that the device has simple assembly process and low transportation and operation cost. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the forced separation rotor of the utility model.

[0010] Figure 2 It is the sectional view of the forced separation rotor of the utility model.

[0011] Figure 3 It is the sectional view of the forced separation rotor of the utility model in the downward direction.

[0012] Figure 4This is a schematic diagram of the forced separation rotor of this utility model from a bottom-view perspective.

[0013] Figure 5 This utility model relates to a gas-liquid separator.

[0014] Figure 6 This is a cross-sectional view of the gas-liquid separator of this utility model.

[0015] Figure 7 This utility model relates to an exhaust box.

[0016] Figure 8 This is an assembly drawing of the present utility model.

[0017] Figure 9 This is a cross-sectional view of the present invention in its assembled state.

[0018] The components are as follows: 1. Forced separation rotor; 1-1. Upper conical disc; 1-2. Upper centrifugal spiral; 1-3. Lower centrifugal spiral; 1-4. Lower conical disc; 1-5. Power blade; 1-6. Lower conical disc support; 1-7. Drive shaft; 1-8. Rotor drain port; 1-9. Rotor bottom support ring; 2. Gas-liquid separation box; 2-1. Air inlet; 2-2. Separation box partition; 2-3. Liquid storage tank; 2-4. Rotor tank; 2-5. Separation box locking plate; 2-6. Drain pipe; 2-7. Rotor hole; 2-8. Rectifier plate; 2-9. Limiting ring; 3. Exhaust box; 3-1. Exhaust box locking plate; 3-2. Exhaust box shell; 3-3. Exhaust port; 4. Motor module; 5. Frame. Detailed Implementation

[0019] Depend on Figures 1-4 As shown, the main structure of the forced separation rotor 1 consists of an upper centrifugal spiral 1-2 and a lower centrifugal spiral 1-3. The upper centrifugal spiral 1-2 is a spiral plate structure, and the lower centrifugal spiral 1-3 is a spiral conical structure. The two are connected to form an assembly. There are three such assemblies in the forced separation rotor 1. The three assemblies are assembled in a circumferential array to form three channels connecting the outside to the center of the forced separation rotor 1.

[0020] The three-unit assembly consists of an upper conical disc 1-1 on the upper side and a lower conical disc 1-4 on the lower side, connecting the three units together. The lower conical disc 1-4 connects to the lower centrifugal screw 1-3 via a rotor drain port 1-8, which connects to both sides of the lower centrifugal screw 1-3. The upper conical disc 1-1 has an opening at its top, containing a power blade 1-5 with four blades. Below the lower conical disc 1-4 is a lower conical disc support 1-6, which provides support and structural reinforcement for the entire assembly. The lower conical disc support 1-6 has a rotor bottom support ring 1-9 at its bottom, a two-link structure with a sealing ring groove at the bottom. The lower conical disc support 1-6 extends downwards from its middle section and connects to a drive shaft 1-7. The drive shaft 1-7 is the power transmission structure and has four drive gears.

[0021] As shown in Figure 5 , 6 , the gas-liquid separation tank 2 has an air inlet 2-1 on one side, the upper part of the air inlet 2-1 is connected with a separation tank partition 2-2, and the lower part is connected with a liquid storage tank 2-3. On one side of the liquid storage tank 2-3, below the air inlet 2-1, there is a liquid discharge pipe 2-6. The upper part of the liquid storage tank 2-3 near the air inlet 2-1 has a flow straightener 2-8 which is a semi-cylindrical structure and has a reinforcing plate on it, which also has a flow straightening effect.

[0022] The other side of the liquid storage tank 2-3 is connected with a rotor tank 2-4, the bottom of which has a rotor hole 2-7, and the upper part is limited by a limiting ring 2-9. The separation tank partition 2-2 has a separation tank locking plate 2-5 on both sides, which has a through hole. The separation tank locking plate 2-5 extends to the edge of the upper part of the rotor tank 2-4. The separation tank partition 2-2 is limited by the limiting ring 2-9 at the position of the rotor tank 2-4.

[0023] As shown in Figure 7 , the exhaust tank 3 is a shell structure, the main body is an exhaust tank shell 3-2, and one side has an exhaust port 3-3. The lower edge of the exhaust tank shell 3-2 has an exhaust tank locking plate 3-1.

[0024] As shown in Figure 1 , 2 , 3, 4, 5, 6, 7, 8, 9.

[0025] In assembly, the position of the frame 5 is determined, and then the motor module 4 is installed first. The motor module 4 is a complete power unit, including motor, power distribution cabinet, transmission system, etc., which can provide power after being connected to the power supply. The upper surface of the motor module 4 is an array of I-beams which can provide support.

[0026] After the motor module 4 is fixed to the frame 5, the gas-liquid separation tank 2 is installed to the designated position, at this time the bottom of the rotor tank 2-4 is placed on the I-beam array on the upper surface of the motor module 4.

[0027] The forced separation rotor 1 is assembled to the rotor tank 2-4, the transmission shaft 1-7 passes through the rotor hole 2-7 and is put into the motor module 4 and connected with the transmission system thereof, the rotor bottom support ring 1-9 is fitted with the bottom of the rotor tank 2-4 after the installation of the sealing ring, and the sealing ring forms a seal between the outside of the rotor bottom support ring 1-9 and the transmission shaft 1-7. At this time, the outer edge of the upper cone disc 1-1 is fitted with the limiting ring 2-9 and the inner wall of the rotor tank 2-4, limiting the gas flow on both sides of the upper cone disc 1-1, and also limiting the position of the forced separation rotor 1.

[0028] After the above steps are completed, the exhaust tank 3 is installed, the exhaust tank locking plate 3-1 is fitted with the separation tank locking plate 2-5, and the exhaust tank locking plate 3-1 is locked with the through hole of the separation tank locking plate 2-5 using bolts, achieving the functions of fixation and sealing.

[0029] After assembly, the device can be transported as a whole by a truck, and can be arranged as a whole on an oil field site or operated on the truck.

[0030] After the device is arranged on a work site, the air inlet 2-1, the exhaust port 3-3 and the liquid discharge pipe 2-6 are connected with the work equipment, so that the gas flow taken from the well head can flow in through the air inlet 2-1, the gas after liquid removal and pressure increase can flow out through the exhaust port 3-3, and the separated liquid can be discharged through the liquid discharge pipe 2-6. At the same time, the motor module 4 is connected with an external power supply for power supply.

[0031] During operation, the motor module 4 drives the forced separation rotor 1 to rotate at a high speed, and the rotating direction is counterclockwise as shown in the direction. Figure 3 The gas quickly flows into the combination formed by the upper centrifugal spiral 1-2 and the lower centrifugal spiral 1-3, and quickly flows in the passages between adjacent combinations. The gas flow with a certain flow rate from the well head flows in through the air inlet 2-1, impacts the rectifier plate 2-8, leaves the large liquid droplets carried on the rectifier plate 2-8, and flows downward to the liquid storage tank 2-3.

[0032] The gas flowing into the liquid storage tank 2-3 is sucked into the upper centrifugal spiral 1-2 and the lower centrifugal spiral 1-3 by the forced separation rotor 1 and impacts the inner walls of the upper centrifugal spiral 1-2 and the lower centrifugal spiral 1-3 at a high speed. The high-speed impact causes small liquid droplets in the residual gas flow to adhere to the inner walls of the upper centrifugal spiral 1-2 and the lower centrifugal spiral 1-3. The adhered liquid flows downward on the upper surface of the lower cone disc 1-4 after gathering, and is discharged to the rotor tank 2-4 through the rotor liquid discharge port 1-8, and finally gathered to the liquid storage tank 2-3 and discharged through the liquid discharge pipe 2-6.

[0033] After the gas flow reaches the central position of the forced separation rotor 1, it reaches the upper part of the forced separation rotor 1 under the drive of the power vane 1-5, flows through the passage formed by the separation tank partition 2-2 and the exhaust tank shell 3-2, and is finally discharged through the exhaust port 3-3.

[0034] When the forced separation rotor 1 rotates at a high speed, the pressure increases when the gas flow enters the passage of the combination formed by the upper centrifugal spiral 1-2 and the lower centrifugal spiral 1-3, and further pressurization is realized when passing through the power vane 1-5.

Claims

1. A portable gas lift compressor, characterized in that, It includes forced separation rotor (1), gas-liquid separation tank (2), exhaust tank (3); The forced separation rotor (1) includes upper cone disc (1-1), upper centrifugal spiral (1-2), lower centrifugal spiral (1-3), lower cone disc (1-4), power blade (1-5), lower cone disc support (1-6), transmission shaft (1-7), rotor liquid discharge port (1-8), rotor bottom support ring (1-9); The gas-liquid separation tank (2) includes air inlet (2-1), separation tank partition (2-2), liquid storage tank (2-3), rotor tank (2-4), separation tank locking plate (2-5), liquid discharge pipe (2-6), rotor hole (2-7), flow regulation plate (2-8), limiting ring (2-9); The exhaust tank (3) includes exhaust tank locking plate (3-1), exhaust tank shell (3-2), exhaust port (3-3); The forced separation rotor (1) is assembled to the rotor tank (2-4); the transmission shaft (1-7) passes through the rotor hole (2-7); the rotor bottom support ring (1-9) is attached to the bottom of the rotor tank (2-4) after installing the sealing ring; the outer edge of the upper cone disc (1-1) is attached to the limiting ring (2-9) and the inner wall of the rotor tank (2-4); The exhaust tank locking plate (3-1) is attached to the separation tank locking plate (2-5) and connected by bolts.

2. A portable gas lift compressor according to claim 1, characterized in that In the forced separation rotor (1), the upper centrifugal spiral (1-2) and the lower centrifugal spiral (1-3) are connected to form a combination, and there are three groups of such combinations in the forced separation rotor (1), and the three groups of combinations are assembled in a circumferential array.

3. A portable gas lift compressor according to claim 1, wherein In the forced separation rotor (1), the lower cone disc (1-4) is connected to the lower centrifugal spiral (1-3) at the position of the rotor liquid discharge port (1-8).

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