Gas lift supercharging device of natural gas well compressor

Abstract

The invention provides a natural gas well compressor gas lift supercharging device, which relates to the technical field of gas lift, comprises a compressor body, a Christmas tree and a first sleeve, and is characterized in that an oil pipe is arranged at the lower end of the Christmas tree, the oil pipe is arranged in the middle of the first sleeve, and a ventilation disc is fixedly mounted between the inner walls of the first sleeve; a plurality of first sleeves are installed on the surface of the lower end of the compressor body, a positioning sealing assembly is arranged between the inner walls of the first sleeves, a plurality of second sleeves are installed on the surface of the lower end of each first sleeve, connecting pipelines are fixedly installed on the inner walls of the second sleeves, and the air outlet pipes are connected with the connecting pipelines. Gas is discharged from a connecting pipeline, enters the oil pipe from a valve on the oil pipe and is mixed with fluid generated by an oil layer in a shaft, gas can be prevented from flowing towards the second sleeve through the second sealing disc, the situation that the sleeve is filled with the gas, and gas leakage occurs on the sleeve is avoided, and the pressure of gas lift can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of gas lift, and in particular to a gas lift boosting device for a natural gas well compressor. Background Art

[0002] Gas lift refers to the cessation of oil well self-flow when the energy supplied by the formation is insufficient to lift crude oil from the bottom of the well to the surface. In order to make the oil well continue to produce oil, gas (natural gas or air) is artificially pressed into the bottom of the well to make the crude oil spray out to the surface. For example, patent application number CN90209934.5 is a gas lift oil production device used in the petroleum industry for oil extraction. This device is composed of a conventional gas lift oil production device plus a dedicated ball control mechanism. By regularly and quantitatively placing gas lift balls in the lift pipe, a slug flow alternating between gas columns and gas lift balls is formed in the lift pipe, so that the energy of the gas is well utilized, the gas injection ratio is reduced, the oil production depth is increased, and the gas lift efficiency is improved. In the above technical solution, during the gas lift process, the gas needs to be filled into the outer sleeve before entering the oil pipe. The gas is prone to leakage in the outer sleeve, which not only affects the pressure of the gas lift, but also easily causes safety hazards. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a natural gas well compressor gas lift booster device, which solves the problem that during the gas lift process, the gas needs to be filled into the outer sleeve before entering the oil pipe, and the gas is prone to leakage in the outer sleeve, which not only affects the gas lift pressure but also easily causes safety hazards.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A natural gas well compressor gas lift boosting device, including a compressor body, an oil tree, and a first sleeve, characterized in that an oil pipe is provided at the lower end of the oil tree, the oil pipe is provided in the middle of the first sleeve, a vent plate is fixedly installed between the inner walls of the first sleeve, a connecting air pipe is fixedly installed on one side surface of the vent plate, an outlet pipe is fixedly installed on the lower surface of the vent plate, the compressor body is connected to the connecting air pipe, a positioning and sealing assembly is provided between the inner walls of the first sleeve, a plurality of second sleeves are installed on the lower end surface of the first sleeve, a connecting pipe is fixedly installed on the inner wall of the second sleeve, and the outlet pipe is connected to the connecting pipe.

[0005] Preferably, connecting plates are fixedly mounted on the upper and lower ends of the second sleeve, and the connecting plates are connected by mounting bolts.

[0006] Preferably, a mounting ring is fixedly mounted on the surface of the connecting disk at the upper end of the second sleeve, and a mounting groove is formed on the connecting disk at the lower end of the second sleeve, and the mounting ring is arranged inside the mounting groove.

[0007] Preferably, a sealing ring is fixedly mounted on the upper end surface of the connecting pipe, a sealing groove is provided on the lower end surface of the connecting pipe, and the sealing ring is arranged inside the sealing groove.

[0008] Preferably, a mounting plate is fixedly mounted on the middle portion of the upper end surface of the first sleeve.

[0009] Preferably, the positioning and sealing assembly includes a first sealing disk and a second sealing disk, and the first sealing disk and the second sealing disk are both slidably arranged on the inner wall of the first sleeve.

[0010] Preferably, the middle surfaces of the first sealing disk and the second sealing disk are provided with a through groove for the oil pipe to pass through, and the surfaces of the first sealing disk and the second sealing disk are provided with through grooves for the air outlet pipe to pass through on both sides.

[0011] Preferably, a hydraulic cylinder is fixedly mounted on the upper surface of the first sealing disk, and an output end of the hydraulic cylinder is arranged on the lower surface of the second sealing disk.

[0012] Preferably, a second groove is provided on the side of the first sealing disk and the second sealing disk that are close to each other, a second rotating shaft is rotatably installed between the inner walls on both sides of each second groove, a first connecting rod is fixedly installed on the side of the second rotating shaft provided on each first sealing disk, a second connecting rod is fixedly installed on the side of the second rotating shaft provided on each second sealing disk, and a positioning arc plate is installed between the top ends of the second connecting rod and the first connecting rod.

[0013] Preferably, two first grooves are provided on the surface of the positioning arc plate, a first rotating shaft is rotatably installed between the inner walls on both sides of each first groove, and the top ends of the second connecting rod and the first connecting rod are respectively arranged on the sides of the first rotating shaft.

[0014] The present invention provides a natural gas well compressor gas lift boosting device, which has the following beneficial effects:

[0015] 1. At this time, the staff slides the first sealing disc and the second sealing disc on the inner wall of the second sleeve. After the second sealing disc is slidably installed at a suitable position on the inner wall of the second sleeve, the output end of the hydraulic cylinder is retracted inward to make the distance between the first sealing disc and the second sealing disc closer. After the distance between the first sealing disc and the second sealing disc is closer, the positioning arc plate can be driven to move outward to make the positioning arc plate fit tightly against the inner wall of the second sleeve, thereby preventing the first sealing disc and the second sealing disc from sliding again, so that the first sealing disc and the second sealing disc play a role in the second sleeve. In the sealed state, the compressor body works at this time, flushing gas from the connecting air pipe into the connecting pipeline, discharging it from the connecting pipeline, and entering the inside of the pipeline from the valve on the pipeline to produce fluid mixing with the oil layer in the wellbore. The expansion of the gas is used to reduce the density of the mixed liquid in the wellbore, and the crude oil flowing into the well is lifted to the ground. The second sealing disk can prevent the gas from flowing to the second sleeve. This device can directly fill the gas into the position of the valve on the pipeline, and the position can be adjusted at will, which can prevent the gas from filling the inside of the sleeve and causing air leakage on the sleeve, thereby ensuring the pressure of the gas lift. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall side view structure of the present invention;

[0018] Figure 3 Schematic diagram of the top view of the first sleeve in the present invention;

[0019] Figure 4 1 is a schematic diagram of the front structure of the first sleeve in the present invention when viewed from below;

[0020] Figure 5 This is a front structural schematic diagram of the first sleeve of the present invention;

[0021] Figure 6 It is a rear enlarged structural schematic diagram of the first sleeve of the present invention;

[0022] Figure 7 It is a structural schematic diagram of the positioning and sealing component of the present invention;

[0023] Figure 8 This is a schematic structural diagram of the first sealing disk in the present invention.

[0024] Among them, 1. compressor body; 2. oil tree; 3. oil pipe; 4. connecting air pipe; 5. mounting plate; 6. connecting plate; 7. first sleeve; 8. mounting bolt; 9. second sleeve; 10. vent plate; 11. positioning closure assembly; 1101. first sealing plate; 1102. hydraulic cylinder; 1103. positioning arc plate; 1104. second sealing plate; 1105. first connecting rod; 1106. second connecting rod; 1107. first groove; 1108. first rotating shaft; 1109. through groove; 1110. through groove; 1111. second groove; 1112. second rotating shaft; 12. outlet pipe; 13. sealing groove; 14. mounting groove; 15. sealing ring; 16. mounting ring; 17. connecting pipe. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figures 1 to 8 As shown, an embodiment of the present invention provides a natural gas well compressor gas lift boosting device, including a compressor body 1, an oil tree 2, and a first sleeve 7, characterized in that an oil pipe 3 is provided at the lower end of the oil tree 2, and the oil pipe 3 is arranged in the middle of the first sleeve 7, a vent plate 10 is fixedly installed between the inner walls of the first sleeve 7, a connecting air pipe 4 is fixedly installed on one side surface of the vent plate 10, an outlet pipe 12 is fixedly installed on the lower surface of the vent plate 10, the compressor body 1 is connected to the connecting air pipe 4, a positioning and sealing assembly 11 is provided between the inner walls of the first sleeve 7, a plurality of second sleeves 9 are installed on the lower end surface of the first sleeve 7, a connecting pipe 17 is fixedly installed on the inner wall of the second sleeve, and the outlet pipe 12 is connected to the connecting pipe 17.

[0027] like Figures 1 to 8 As shown, the upper and lower ends of the second sleeve 9 are fixedly mounted with connecting plates 6, and the connecting plates 6 are connected by mounting bolts 8, which can facilitate the installation of the second sleeves 9 and adjust the lengths of several second sleeves 9.

[0028] like Figures 1 to 8As shown, a mounting ring 16 is fixedly installed on the surface of the connecting disk 6 at the upper end of the second sleeve 9, and a mounting groove 14 is provided on the connecting disk 6 at the lower end of the second sleeve 9. The mounting ring 16 is arranged inside the mounting groove 14. A sealing ring 15 is fixedly installed on the upper end surface of the connecting pipe 17, and a sealing groove 13 is provided on the lower end surface of the connecting pipe 17. The sealing ring 15 is arranged inside the sealing groove 13, so that the connection relationship between the several second sleeves 9 is stable and the connection relationship between the several connecting pipes 17 can be made more sealed. According to the length of the oil pipe 3, the second sleeve 9 is installed on the lower end of the first sleeve 7, so that the length between the second sleeve 9 and the first sleeve 7 is adapted to the length of the oil pipe 3. After the second sleeve 9 and the first sleeve 7 are installed, the connecting pipes 17 on their inner walls will also be connected.

[0029] like Figures 1 to 8 As shown, a mounting plate 5 is fixedly mounted on the middle portion of the upper surface of the first sleeve 7, which can facilitate the installation of the first sleeve 7 on the ground and is convenient for operators to operate.

[0030] like Figures 1 to 8As shown, the positioning sealing component 11 includes a first sealing disk 1101 and a second sealing disk 1104, the first sealing disk 1101 and the second sealing disk 1104 are both slidably arranged on the inner wall of the first sleeve 7, the middle surfaces of the first sealing disk 1101 and the second sealing disk 1104 are provided with a through groove 1110 for the oil pipe 3 to pass through, the surfaces of the first sealing disk 1101 and the second sealing disk 1104 are both provided with a through groove 1109 for the air outlet pipe 12 to pass through, a hydraulic cylinder 1102 is fixedly installed on the upper surface of the first sealing disk 1101, and the output end of the hydraulic cylinder 1102 is arranged on the lower surface of the second sealing disk 1104, and the first sealing disk 1101 and the second sealing disk 1104 are both provided with a second sealing disk 1109 on the side close to each other. Groove 1111, a second rotating shaft 1112 is rotatably installed between the inner walls on both sides of each second groove 1111, a first connecting rod 1105 is fixedly installed on the side of the second rotating shaft 1112 set on each first sealing disk 1101, a second connecting rod 1106 is fixedly installed on the side of the second rotating shaft 1112 set on each second sealing disk 1104, a positioning arc plate 1103 is installed between the top of the second connecting rod 1106 and the first connecting rod 1105, two first grooves 1107 are provided on the surface of the positioning arc plate 1103, a first rotating shaft 1108 is rotatably installed between the inner walls on both sides of each first groove 1107, and the tops of the second connecting rod 1106 and the first connecting rod 1105 are respectively set On the side of the first rotating shaft 1108, first, according to the length of the oil pipe 3, the second sleeve 9 is installed on the lower end of the first sleeve 7, so that the length between the second sleeve 9 and the first sleeve 7 is adapted to the length of the oil pipe 3. After the second sleeve 9 and the first sleeve 7 are installed, the connecting pipe 17 of the inner wall thereof is also connected. At this time, the staff slides the first sealing disc 1101 and the second sealing disc 1104 on the inner wall of the second sleeve 9. After the second sealing disc 1104 is slid and installed at the appropriate position on the inner wall of the second sleeve 9, the output end of the hydraulic cylinder 1102 is extended and retracted inwardly to shorten the distance between the first sealing disc 1101 and the second sealing disc 1104. After the distance between them becomes closer, and because the output end of the hydraulic cylinder 1102 is arranged on the lower surface of the second sealing disk 1104, a second groove 1111 is provided on the side of the first sealing disk 1101 and the second sealing disk 1104 close to each other, and a second rotating shaft 1112 is rotatably installed between the inner walls on both sides of each second groove 1111, and a first connecting rod 1105 is fixedly installed on the side of the second rotating shaft 1112 set on each first sealing disk 1101, and a second connecting rod 1106 is fixedly installed on the side of the second rotating shaft 1112 set on each second sealing disk 1104, and a positioning arc plate 1103 is installed between the top ends of the second connecting rod 1106 and the first connecting rod 1105, and two first grooves 1107 are provided on the surface of the positioning arc plate 1103.A first rotating shaft 1108 is rotatably installed between the inner walls on both sides of each first groove 1107, and the top ends of the second connecting rod 1106 and the first connecting rod 1105 are respectively arranged on the side of the first rotating shaft 1108, at this time, the positioning arc plate 1103 can be driven to move outward, so that the positioning arc plate 1103 is tightly fitted on the inner wall of the second sleeve 9, thereby preventing the first sealing disk 1101 and the second sealing disk 1104 from sliding again, so that the first sealing disk 1101 and the second sealing disk 1104 can seal the second sleeve 9, and at this time, the compressor body 1 is used to work. The gas is flushed from the connecting gas pipe 4 into the connecting pipe 17, discharged from the connecting pipe 17, and then enters the interior of the oil pipe 3 through the valve on the oil pipe 3, mixing with the oil layer in the wellbore. The expansion of the gas reduces the density of the mixed liquid in the wellbore, lifting the crude oil flowing into the well to the surface. The second sealing disk 1104 prevents the gas from flowing into the second sleeve 9. This device can directly fill the valve position on the oil pipe 3, and the position can be adjusted at will. It can prevent the gas from filling the interior of the sleeve and causing air leakage in the sleeve, and can ensure the pressure of the gas lift.

[0031] Working principle: When it is necessary to use this device to perform oil and gas lifting work, first install the second sleeve 9 on the lower end of the first sleeve 7 according to the length of the oil pipe 3, so that the length between the second sleeve 9 and the first sleeve 7 is adapted to the length of the oil pipe 3. After the second sleeve 9 and the first sleeve 7 are installed, the connecting pipe 17 on the inner wall will also be connected. At this time, the staff will slide the first sealing disc 1101 and the second sealing disc 1104 on the inner wall of the second sleeve 9. After the second sealing disc 1104 is slid and installed in the appropriate position on the inner wall of the second sleeve 9, the output end of the hydraulic cylinder 1102 is extended and retracted inward to make the first sealing disc 1101 1104, and the distance between the first sealing disk 1101 and the second sealing disk 1104 becomes closer. After the distance between the first sealing disk 1101 and the second sealing disk 1104 becomes closer, and because the output end of the hydraulic cylinder 1102 is arranged on the lower surface of the second sealing disk 1104, the first sealing disk 1101 and the second sealing disk 1104 are provided with a second groove 1111 on one side close to each other, and a second rotating shaft 1112 is rotatably installed between the inner walls on both sides of each second groove 1111, and a first connecting rod 1105 is fixedly installed on the side of the second rotating shaft 1112 provided on each first sealing disk 1101, and a second connecting rod 1105 is fixedly installed on the side of the second rotating shaft 1112 provided on each second sealing disk 1104. 6. A positioning arc plate 1103 is installed between the top of the second connecting rod 1106 and the first connecting rod 1105. Two first grooves 1107 are provided on the surface of the positioning arc plate 1103. A first rotating shaft 1108 is rotatably installed between the inner walls on both sides of each first groove 1107. The tops of the second connecting rod 1106 and the first connecting rod 1105 are respectively arranged on the side of the first rotating shaft 1108. At this time, the positioning arc plate 1103 can be driven to move outward, so that the positioning arc plate 1103 is tightly attached to the inner wall of the second sleeve 9, thereby preventing the first sealing disk 1101 and the second sealing disk 1104 from sliding again, so that the first sealing disk 1101 and the second sealing disk 1104 are 04 seals the second sleeve 9. At this time, the compressor body 1 works to flush the gas from the connecting air pipe 4 into the connecting pipe 17, which is then discharged from the connecting pipe 17 and enters the inside of the oil pipe 3 from the valve on the oil pipe 3. The mixture is mixed with the oil layer in the wellbore, and the density of the mixed liquid in the wellbore is reduced by the expansion of the gas, so that the crude oil flowing into the well is lifted to the ground. The second sealing disk 1104 can prevent the gas from flowing to the second sleeve 9. This device can directly fill the gas into the position of the valve on the oil pipe 3, and the position can be adjusted at will, which can prevent the gas from filling the inside of the sleeve and causing air leakage on the sleeve, thereby ensuring the pressure of the gas lift.

[0032] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A natural gas well compressor gas lift boosting device, comprising a compressor body (1), a Christmas tree (2), and a first sleeve (7), characterized in that: An oil pipe (3) is provided at the lower end of the Christmas tree (2), and the oil pipe (3) is provided in the middle of the first sleeve (7). A vent plate (10) is fixedly installed between the inner walls of the first sleeve (7). A connecting air pipe (4) is fixedly installed on one side surface of the vent plate (10). An outlet pipe (12) is fixedly installed on the lower surface of the vent plate (10). The compressor body (1) is connected to the connecting air pipe (4). A positioning sealing component (11) is provided between the inner walls of the first sleeve (7). A plurality of second sleeves (9) are installed on the lower end surface of the first sleeve (7). A connecting pipe (17) is fixedly installed on the inner wall of the second sleeve. The outlet pipe (12) is connected to the connecting pipe (17).

2. A natural gas well compressor gas lift boosting device according to claim 1, characterized in that: Connecting plates (6) are fixedly mounted on the upper and lower ends of the second sleeve (9), and the connecting plates (6) are connected via mounting bolts (8).

3. A natural gas well compressor gas lift boosting device according to claim 2, characterized in that: A mounting ring (16) is fixedly mounted on the surface of the connecting disk (6) at the upper end of the second sleeve (9), and a mounting groove (14) is formed on the connecting disk (6) at the lower end of the second sleeve (9), wherein the mounting ring (16) is arranged inside the mounting groove (14).

4. A natural gas well compressor gas lift boosting device according to claim 3, characterized in that: A sealing ring (15) is fixedly mounted on the upper end surface of the connecting pipe (17), a sealing groove (13) is opened on the lower end surface of the connecting pipe (17), and the sealing ring (15) is arranged inside the sealing groove (13).

5. The gas lift boosting device for a natural gas well compressor according to claim 4, characterized in that: A mounting plate (5) is fixedly mounted on the middle portion of the upper end surface of the first sleeve (7).

6. The gas lift boosting device for a natural gas well compressor according to claim 1, characterized in that: The positioning sealing assembly (11) comprises a first sealing disc (1101) and a second sealing disc (1104), and the first sealing disc (1101) and the second sealing disc (1104) are both slidably arranged on the inner wall of the first sleeve (7).

7. The gas lift boosting device for a natural gas well compressor according to claim 6, characterized in that: The first sealing disc (1101) and the second sealing disc (1104) are provided with a through groove (1110) on their middle surfaces for the oil pipe (3) to pass through, and the first sealing disc (1101) and the second sealing disc (1104) are provided with a through groove (1109) on both sides of their surfaces for the air outlet pipe (12) to pass through.

8. The gas lift boosting device for a natural gas well compressor according to claim 7, characterized in that: A hydraulic cylinder (1102) is fixedly mounted on the upper surface of the first sealing disk (1101), and an output end of the hydraulic cylinder (1102) is arranged on the lower surface of the second sealing disk (1104).

9. The gas lift boosting device for a natural gas well compressor according to claim 8, characterized in that: A second groove (1111) is provided on the side of the first sealing disk (1101) and the second sealing disk (1104) that are close to each other, and a second rotating shaft (1112) is rotatably installed between the inner walls on both sides of each second groove (1111). A first connecting rod (1105) is fixedly installed on the side of the second rotating shaft (1112) provided on each first sealing disk (1101), and a second connecting rod (1106) is fixedly installed on the side of the second rotating shaft (1112) provided on each second sealing disk (1104). A positioning arc plate (1103) is installed between the top ends of the second connecting rod (1106) and the first connecting rod (1105).

10. The gas lift boosting device for a natural gas well compressor according to claim 9, characterized in that: Two first grooves (1107) are provided on the surface of the positioning arc plate (1103), and a first rotating shaft (1108) is rotatably installed between the inner walls on both sides of each first groove (1107), and the top ends of the second connecting rod (1106) and the first connecting rod (1105) are respectively arranged on the side faces of the first rotating shaft (1108).

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