CN-224228653-U - Pressure reducing device for gas lift wellhead of differential pressure type compressor

CN224228653UCN 224228653 UCN224228653 UCN 224228653UCN-224228653-U

Abstract

The utility model discloses a pressure-difference compressor gas lift wellhead pressure reducing device, which relates to the technical field of drainage and gas production matching devices, and comprises an air inlet pipe and an air outlet pipe, wherein a pressure-reducing separation chamber is arranged between the air inlet pipe and the air outlet pipe, an adjusting mechanism is arranged in the pressure-reducing separation chamber, a gas-liquid channel, a gas-liquid separation chamber, a pressure-reducing channel and a mounting chamber are arranged in the pressure-reducing separation chamber, the adjusting mechanism comprises a waterproof motor, a screw rod and a piston, the screw rod is driven by the waterproof motor to rotate by the adjusting mechanism, the screw rod drives the piston to move inside the gas-liquid channel, so that the pressure-reducing channels of a first layer to a third layer leak out, and gas-liquid mixed phases enter into pressure-reducing channels with different layers.

Inventors

YAN ZIKAI
XIE ERZHONG
ZENG CHENG
YANG XU
TAO WEILE
LI TING
ZHANG LEIPING

Assignees

成都立联科能源科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250613

Claims (8)

1. The pressure reducing device for the pressure differential type compressor gas lift wellhead is characterized by comprising an air inlet pipe (1) and an air outlet pipe (2), wherein a pressure reducing separation chamber is arranged between the air inlet pipe (1) and the air outlet pipe (2), and an adjusting mechanism (7) is arranged in the pressure reducing separation chamber; The pressure reducing and separating chamber is internally provided with a gas-liquid channel (3), a gas-liquid separating chamber (4), a pressure reducing channel (301) and a mounting chamber (302); Wherein, adjustment mechanism (7) include waterproof type motor (701), lead screw (703) and piston (706).
2. The pressure reducing device for the gas lift wellhead of the differential pressure compressor of claim 1, wherein a first pressure gauge (5) is fixedly connected to the middle section of the gas inlet pipe (1), a second pressure gauge (501) is fixedly connected to the middle section of the gas outlet pipe (2), and a liquid outlet pipe (6) is fixedly connected to the bottom of the pressure reducing separation chamber.
3. The pressure reducing device for the gas lift wellhead of the differential pressure compressor as set forth in claim 2, wherein the waterproof motor (701) is fixedly installed inside the installation cavity (302), a conduit (9) is fixedly connected to the top surface of the waterproof motor (701), a PLC (8) is fixedly connected to one end, far away from the waterproof motor (701), of the conduit (9), and the PLC (8) is fixedly connected to the outer wall of the pressure reducing separation chamber.
4. A pressure reducing device for a gas lift wellhead of a differential pressure compressor as set forth in claim 3, wherein a gas-liquid separation chamber (4) in the pressure reducing separation chamber is arranged on the outer side, a gas-liquid channel (3) is arranged on the inner side, the gas-liquid channel (3) is communicated with an air inlet pipe (1), and the gas-liquid separation chamber (4) is communicated with an air outlet pipe (2).
5. The pressure-reducing device for a gas lift wellhead of a differential pressure compressor as set forth in claim 4, wherein the pressure-reducing channels (301) are provided with three layers, each layer of pressure-reducing channels (301) is four, and two ends of the pressure-reducing channels (301) are respectively communicated with the gas-liquid channels (3) and the gas-liquid separation cavity (4).
6. The pressure-difference compressor gas lift wellhead pressure reducing device of claim 5, wherein an output end of the waterproof motor (701) is fixedly connected with a screw rod (703), a first sealing sleeve (702) is fixedly connected to one side, close to the screw rod (703), of the waterproof motor (701), the first sealing sleeve (702) is rotatably connected with the output end of the waterproof motor (701), and a second sealing sleeve (708) is fixedly connected to one end, far away from the first sealing sleeve (702), of the waterproof motor (701).
7. The pressure reducing device for a gas lift wellhead of a differential pressure compressor as set forth in claim 6, wherein a fixed rod (705) is fixedly connected to the inner side of the gas inlet pipe (1), a supporting shaft (704) is fixedly connected to the middle section of the fixed rod (705), and the supporting shaft (704) is rotatably connected with one end of the screw rod (703) far away from the waterproof motor (701).
8. A pressure reducing device for a gas lift wellhead of a differential pressure compressor as set forth in claim 7, wherein the piston (706) is in threaded connection with a screw rod (703), the piston (706) is in sliding connection with the inner wall of a gas-liquid channel (3), guide rods (707) are fixedly connected to two ends of the fixed rod (705), one end of each guide rod (707) far away from the fixed rod (705) is fixedly connected with a waterproof motor (701), and the two guide rods (707) penetrate through the piston (706) and are in sliding connection with the piston.

Description

Pressure reducing device for gas lift wellhead of differential pressure type compressor Technical Field The utility model relates to the technical field of drainage and gas production matching devices, in particular to a pressure reducing device for a gas lift wellhead of a differential pressure type compressor. Background Compressor (nitrogen) gas lift requires venting of the miscible gas-liquid from the bottom of the well to the top of the well downstream of the well top. The discharging effect depends on the pressure at the wellhead downstream, and during discharging, the control of the wellhead discharging instant pressure is realized by adjusting a throttle valve at the wellhead downstream of the gas well. At present, a downstream liquid discharge airtight gathering and transportation process is mostly adopted by the gas lift of a compressor (nitrogen), the effect of the process depends on the pressure of a gas collection main pipe, and when the pressure of the gas collection main pipe exceeds 5MPa, mixed phase gas and liquid lifted from the bottom of a well to the top of the well can form an overpressure phenomenon at a downstream throttle valve, so that the downstream throttle valve is damaged and even a pipeline is broken. At present, the existing pressure-difference type compressor gas lift wellhead pressure reducing device has the publication number of (CN 212054648U), a pressure reducing channel of a wellhead pressure reducing separation chamber is communicated with an air inlet pipe, a gas-liquid separation channel is communicated with an air outlet pipe, each group of flow guiding units are used for communicating the pressure reducing channel with the gas-liquid separation channel and reducing pressure step by step along the direction from the air inlet pipe to the air outlet pipe, each group of flow guiding units at least comprises two flow guiding channels, a slide valve structure is arranged in the pressure reducing channel and used for pressure relief of the flow guiding channels of each group of flow guiding units, a liquid discharging channel is arranged at the bottom of the gas-liquid separation channel and used for discharging separated liquid, and a pressure detecting piece is respectively arranged on the air inlet pipe and the air outlet pipe. The utility model also discloses a method for decompressing the compressor gas lift wellhead by the decompressing device, the wellhead pressure reducing device ensures continuous operation time of the compressor, improves liquid discharge efficiency and ensures continuity of gas lifting measures of the compressor. The prior device is found to have at least the following technical problems in actual use; When the overpressure phenomenon occurs, the piston head can compress the spring to be in a limit compression state for a long time, and the spring material can be fatigued due to the limit compression for a long time, so that the elasticity of the spring material is attenuated, and the resetting of the conical piston head is affected, so that the device has the problem of lower service life. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a pressure-difference type compressor gas lift wellhead pressure reducing device, which solves the problem of lower service life of the existing device. In order to achieve the above purpose, the utility model is realized by the following technical scheme: The utility model provides a pressure differential compressor gas lift well head pressure relief device, includes intake pipe and outlet duct, is provided with the decompression separation chamber between intake pipe and the outlet duct, is provided with adjustment mechanism in the decompression separation chamber, is provided with gas-liquid passage, gas-liquid separation chamber, decompression passageway and installation cavity in the decompression separation chamber, and adjustment mechanism includes waterproof motor, lead screw and piston. Preferably, the middle section of the air inlet pipe is fixedly connected with a first pressure gauge, the middle section of the air outlet pipe is fixedly connected with a second pressure gauge, and the bottom of the decompression separation chamber is fixedly connected with a liquid outlet pipe. Preferably, the waterproof motor is fixedly arranged at the inner side of the installation cavity, the top surface of the waterproof motor is fixedly connected with a conduit, one end of the conduit, which is far away from the waterproof motor, is fixedly connected with a PLC (programmable logic controller) which is fixedly connected with the outer wall of the decompression separation chamber. Preferably, the gas-liquid separation cavity in the decompression separation chamber is arranged on the outer side, the gas-liquid channel is arranged on the inner side, the gas-liquid channel is communicated with the gas inlet pipe, and the gas-liquid separation cavity is communicated with