CN110030491B - Oil extraction wellhead associated gas linkage type piston pressurizing recovery device and method - Google Patents
Oil extraction wellhead associated gas linkage type piston pressurizing recovery device and method Download PDFInfo
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- CN110030491B CN110030491B CN201910352390.1A CN201910352390A CN110030491B CN 110030491 B CN110030491 B CN 110030491B CN 201910352390 A CN201910352390 A CN 201910352390A CN 110030491 B CN110030491 B CN 110030491B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000000605 extraction Methods 0.000 title claims abstract description 24
- 238000011084 recovery Methods 0.000 title claims description 40
- 238000005086 pumping Methods 0.000 claims abstract description 22
- 238000005461 lubrication Methods 0.000 claims abstract description 21
- 241000191291 Abies alba Species 0.000 claims abstract description 11
- 238000002485 combustion reaction Methods 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 92
- 239000010687 lubricating oil Substances 0.000 claims description 42
- 238000012856 packing Methods 0.000 claims description 33
- 238000007789 sealing Methods 0.000 claims description 25
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 9
- 239000003129 oil well Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000009530 blood pressure measurement Methods 0.000 claims description 6
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000007789 gas Substances 0.000 description 224
- 238000010586 diagram Methods 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/14—Provisions for readily assembling or disassembling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/065—Arrangements for producing propulsion of gases or vapours
- F17D1/07—Arrangements for producing propulsion of gases or vapours by compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Compressor (AREA)
Abstract
The invention provides a device and a method for recovering associated gas linkage type piston pressurization of an oil extraction wellhead, comprising an oil pumping unit, a connecting seat, a casing gas booster pump, a filter, an air inlet pipeline, an oil extraction wellhead, an air outlet pipeline, an oil extraction tree, an emptying system, a torch combustion system, a four-way valve, a pressure control system, a flow control system and a lubrication system; the pumping unit is connected with the casing gas booster pump through a connecting seat, the casing gas booster pump is connected with a filter, the filter is connected with a christmas tree positioned in an oil extraction wellhead, and an air outlet pipe line is connected with an air outlet of the casing gas booster pump; the production tree gas outlet is respectively connected with a pressure control system, a blow-down system and a torch burning system, and a flow control system is arranged between the pressure control system and the filter; the invention adopts the associated gas pressure control system, the flow control system and the temperature control system to respectively adjust the pressure, the flow and the temperature of the associated gas, and the lubrication system prolongs the service life of the casing gas booster pump.
Description
Technical Field
The invention relates to a supercharging recovery device in petroleum and natural gas industries, in particular to a linkage type piston supercharging recovery device and method for associated gas of an oil extraction wellhead.
Background
In the crude oil extraction process, an oil well pipeline is divided into an oil pipe and a sleeve, the oil pipe is a runner for lifting fluid to the ground after the fluid is worked by a pump, the sleeve is a runner at the outer layer of the oil pipe, and the sleeve can be used for extending gas separated from a stratum to the ground. In the process, petroleum flows into the bottom of the well under the drive of formation pressure, flows upwards along the well shaft under the action of the bottom-hole pressure, and natural gas dissolved in the petroleum is associated under the lower saturation pressure along with the gradual reduction of the flowing pressure, and is separated out and enters an annular space between the casing and the oil pipe, namely casing gas is also called associated gas.
The oil field associated gas has rich resource and high recycling value, but the associated gas has low enrichment degree, large uncertainty, relatively rapid decrease, and large imbalance of the output and the demand of winter and summer and new and old areas, and has large difficulty in recycling at low cost and high efficiency. In particular, the low permeability oil field has low single well output, high construction investment, low cost development to ensure the development benefit, and the investment of ground engineering construction must be effectively controlled within economic limits. Therefore, from the demand of reducing the cost, the technology suitable for the recovery and comprehensive utilization of the associated gas with low permeability and oil field characteristics and with economic and environmental protection is researched and developed, and effective technical integration is carried out so as to realize the comprehensive utilization, energy conservation and emission reduction of the associated gas with low permeability and oil field.
The low-permeability oilfield oil well casing gas recovery at the present stage mainly adopts a constant pressure valve recovery process, the scheme has less investment and simple equipment, but the technology is influenced by the normal work and the efficiency of a low-permeability oilfield deep well oil extraction pump, the low-casing-pressure operation is often required, the casing gas recovery of a high-back pressure well group is difficult, the casing gas discharge amount is large especially when the low-permeability oilfield oil well casing gas recovery runs in winter, and precious resources are wasted and the environment is damaged. Therefore, in order to ensure that the casing gas is effectively recovered from the source, a supercharging device capable of supercharging and outputting the wellhead associated gas into an output oil pipeline needs to be developed and researched, and the device needs to have the advantages of low cost, reliable operation and the like.
Disclosure of Invention
The well head supercharging device of the oil recovery that is widely used now mainly has following several problems: 1. the existing oil extraction wellhead has complex geographical environment, wide distribution area and large temperature fluctuation, and the supercharging equipment is difficult to work normally under the high-temperature or extremely cold condition. 2. The design volume of the booster pump is too small, but when the associated gas at the wellhead is too much, the associated gas cannot be compressed in time to boost pressure, and the gas lock phenomenon is easy to occur. 3. The production of associated gas at the oil production wellhead can be fluctuated, and the flow of the associated gas suddenly rises or falls, so that the normal use of the booster pump is affected. 4. The existing booster pump is low in service life because of lack of sufficient lubrication or maintenance, and the booster pump can be replaced or maintained only in half a year. In order to overcome the problems, the invention provides a device and a method for recovering associated gas at the wellhead of an oil production well by linkage type piston pressurization, which are used for recovering casing gas generated at the wellhead of the oil production well and pumping the casing gas into an oil pipeline for oil-gas mixed transportation.
The invention adopts the technical scheme that:
The utility model provides an oil recovery well head associated gas interlock formula piston pressure boost recovery unit, includes beam-pumping unit, connecting seat, sleeve gas booster pump, filter, inlet line, oil recovery well head, outlet line, christmas tree, blow-down system, torch combustion system, cross, pressure control system, flow control system and lubricating system; the pumping unit is connected with the casing gas booster pump through a connecting seat, the casing gas booster pump is connected with a filter, the filter is connected with a christmas tree positioned in an oil extraction wellhead, and an air outlet pipe line is connected with an air outlet of the casing gas booster pump; the production tree gas outlet is respectively connected with a pressure control system, a blow-down system and a torch burning system, and a flow control system is arranged between the pressure control system and the filter; the oil outlet of the christmas tree is respectively connected with a gate valve, oil-gas mixed transportation and compressed gas entering an oil transportation pipeline through a four-way joint; an electric tracing system, a water-cooled cooler and a ball valve are arranged between the filter and the casing gas booster pump; four air inlet pipelines are arranged on the casing gas booster pump, and each pipeline is provided with a one-way valve; the sleeve gas booster pump is provided with a booster pump lubrication system; the sleeve gas booster pump is connected with a pressurized gas buffer tank; the oil outlet of the pressurized gas buffer tank enters the oil outlet four-way through an oil pipeline through a water-cooled cooler, and a pressure gauge is arranged on the oil pipeline.
The electric tracing system at least comprises a power supply, an electric tracing control cabinet, a tracing wire and a gas pipeline, wherein the electric tracing control cabinet is connected with the gas pipeline through the tracing wire, and the power supply is electrically connected with the electric tracing control cabinet.
The pressure control system at least comprises a flow pressure gauge, a pressure shut-off valve, a gas pressure controller and a pressure reducing valve, wherein the pressure shut-off valve is arranged on the gas pressure controller, and the pressure reducing valve is arranged between an inlet of the pressure shut-off valve and an oil pipeline; the flow control system at least comprises a gas flow controller, a flow shutoff valve and a throttle valve, wherein the throttle valve and the gas flow controller are respectively connected with an outlet of the gas pressure controller, and the gas flow controller is provided with the flow shutoff valve.
The lubricating system at least comprises a lubricating oil pump, a lubricating oil storage tank, a lubricating oil pipeline and a lubricating oil pool; the lubricating oil pump be connected with the lubricating oil storage tank, the lubricating oil storage tank is connected with lubricating oil pool and casing gas booster pump respectively through the lubricating oil pipeline, lubricating oil pool sets up in casing gas booster pump below.
The sleeve gas booster pump at least comprises a wellhead booster pump upper and lower joint connection structure, a cylinder cover and cylinder head connection fixing structure, a booster pump sealing structure and a booster pump gas transmission pipe structure.
The upper and lower joint connecting structure of the wellhead booster pump at least comprises a booster pump upper bracket, a hexagonal head bolt, a nut, a gasket, a baffle, a cotter pin, a non-fixed partition ring, a joint bearing, a pin shaft, a cylinder cover lug, a connecting lug and a locking nut; the upper support of the booster pump is connected with the booster pump through a cylinder cover support lug, the cylinder cover support lug is connected with the connecting support lug through a cotter pin in a cold-fitting manner, and empty cavities are formed in the cylinder cover support lug and the connecting support lug; the outmost layer of the cavity is a cotter pin, the middle of the cavity is a rotatable knuckle bearing, the innermost layer is a pin shaft, and a non-fixed partition ring is arranged in the middle of each support lug to prevent the support lugs from being in direct contact; the outer sides of the two ends of the cotter pin are provided with baffle plates which are connected by hexagon head bolts and nuts penetrating through the pin shaft, and gaskets are arranged between the bolts and the nuts.
The connecting and fixing structure of the cylinder cover and the cylinder head at least comprises a packing plate, an inner hexagon bolt, equal-length stud bolts, internal packing, a booster pump cylinder body, a bushing, an upper cylinder body O-shaped ring, an upper cylinder cover, a packing pressing sleeve, stud bolts and the cylinder head; the packing pressing sleeve is arranged between the packing plate and the upper cylinder cover, and the packing plate is fastened and connected with the upper cylinder cover through a stud bolt; the upper cylinder cover is connected with the booster pump cylinder body through equal-length stud bolts, and the upper cylinder cover is connected with the upper cylinder head through inner hexagon bolts; three annular grooves are arranged between the cylinder head and the booster pump cylinder body, and an upper cylinder body O-shaped ring is arranged in the middle annular groove; an internal packing is arranged between the cylinder body and the piston rod, and a lining is arranged below the internal packing.
The sealing structure of the booster pump at least comprises a booster pump cylinder body, a piston rod, a piston O-shaped ring, a piston lock nut, an elastic washer, a piston expansion ring and a piston sealing ring; the periphery of the piston is provided with 5 annular grooves, a piston sealing ring and a piston expansion ring are sleeved in the annular grooves, wherein the piston sealing ring is arranged on the outer layer, and the piston expansion ring is arranged on the inner layer; the piston rod is connected with the piston through a piston lock nut at the bottom, and an elastic washer is arranged in the middle; the piston rod inside the piston is provided with 3 annular grooves, and the O-shaped sealing rings of the piston are arranged in the 3 annular grooves.
The booster pump gas pipe structure at least comprises a booster pump cylinder body, a gas transmission pipe body, a compression spring, a piston rod, a pipe fixing clamp ring and a gas valve; the gas pipeline pipe body is positioned on the booster pump cylinder body, and the pipeline fixing clamp ring is welded in the gas pipeline pipe body; the pipeline fixing clamp ring is connected with a compression spring through an air valve, and the compression spring is positioned in the pipeline body of the gas transmission pipeline; the piston rod is positioned in the center of the cylinder body of the booster pump.
A method for recovering associated gas of an oil extraction wellhead by linkage type piston pressurization specifically comprises the following steps:
After the associated gas is extracted from the oil well casing, the associated gas is transmitted to an emptying system, a torch burning system or a pressurizing recovery system through a gas outlet four-way valve, and the associated gas subjected to pressure and flow metering sequentially enters a pressure control system and a flow control system; if the associated gas meets the supercharging recovery condition, the associated gas is filtered by a gas filter and then is transmitted to a temperature control system consisting of an electric heat tracing system and a water-cooled cooler for temperature adjustment; the temperature-regulated associated gas enters a pump through four air inlet pipelines of a casing gas booster pump to be boosted, then enters a pressurized gas buffer tank to be buffered, and the boosted associated gas flows through a temperature control system again to perform temperature control operation, so that the temperature of the associated gas is ensured not to exceed a specified temperature range, and the associated gas is introduced into an oil pipeline for mixed transportation after pressure measurement; if the pressurization is not needed or the booster pump is overhauling, the associated gas is directly connected with a bypass pipeline and then is input into an oil pipeline for external transportation after passing through a pressure reducing valve; the lubrication system automatically lubricates the associated gas booster pump and the pumping unit.
The beneficial effects of the invention are as follows:
The invention is characterized in that associated gas is extracted from an oil extraction well, can be conveyed to an emptying system, a torch combustion system or a recovery system through a four-way valve, the associated gas subjected to pressure and flow measurement sequentially enters a pressure control system and a flow control system, is filtered by a filter, clean associated gas is conveyed to a temperature control system for temperature adjustment, the associated gas subjected to temperature adjustment enters a booster pump through four air inlet pump openings above or below a piston booster pump, is pressurized and then enters a buffer tank for buffering, and flows through the temperature control system again for cooling operation, is pumped into an oil pipeline for mixed transportation after pressure measurement, and is directly conveyed into a bypass pipeline for external transportation after passing through a pressure reducing valve if pressurization or the booster pump is not required to be overhauled; the booster pump is lubricated by the lubrication system at regular time to prolong the service life of the booster pump.
Further description will be made below with reference to the accompanying drawings.
Drawings
FIG. 1 is a wellhead linkage type piston booster pump pressurization process diagram.
FIG. 2 is a general flow chart of an oil extraction wellhead associated gas linkage type piston pressurizing recovery device.
FIG. 3 is a flow chart of control of the air inlet pipeline of the linkage type supercharging recovery device.
FIG. 4 is a diagram of the internal structure of the associated gas-linked piston booster pump.
Figure 5 is an external structural diagram of the associated gas coupled piston booster pump.
FIG. 6 is a diagram of the articulation structure of the associated gas-linked piston booster pump.
FIG. 7 is a diagram of a gas pipeline structure of an associated gas linkage type piston booster pump.
FIG. 8 is a piston seal structure diagram of an associated gas coupled piston booster pump.
FIG. 9 associated gas linkage type piston booster pump the cylinder cover is connected with the cylinder body.
Figure 10 is a top plan view of an associated gas coupled piston booster pump.
Fig. 11 is a diagram of an electric tracing pipeline heating system.
In the drawings, reference numerals are: 1. pumping unit; 2. a connecting seat; 3. a casing gas booster pump; 4. a gas filter; 5. an air intake line; 6. an oil extraction wellhead; 7. an air outlet line; 8. a lubrication pump; 9. a lubricating oil storage tank; 10. a pressurized gas buffer tank; 11. a lubricating oil line; 12. a one-way valve; 13. a lubricating oil sump; 14. a ball valve; 15. a water-cooled cooler; 16. an electric tracing system; 17. a gas flow controller; 18. a flow shutoff valve; 19. a throttle valve; 20. a pressure shut-off valve; 21. a gas pressure controller; 22. a flow pressure gauge; 23. a tree; 24. a four-way joint; 25. a gate valve; 26. a pressure reducing valve; 27. a pressure gauge; 28. a booster pump upper bracket; 29. a hex head bolt; 30. a nut; 31. a gasket; 32. a baffle; 33. a cotter pin; 34. a non-stationary partition ring; 35. a knuckle bearing; 36. a pin shaft; 37. a cylinder cover support lug; 38. connecting the lugs; 39. a lock nut; 40. a filler plate; 41. an inner hexagon bolt; 42. equal-length stud bolts; 43. an internal filler; 44. a booster pump cylinder; 45. a gas pipeline body; 46. a compression spring; 47. a piston rod; 48. a booster pump cavity; 49. a piston; 50. a piston O-ring; 51. a piston lock bolt; 52. a piston lock nut; 53. an O-shaped ring of the lower cylinder body; 54. a booster pump lower bracket; 55. the lower joint of the cylinder body is connected; 56. a lower cylinder cover; 57. an elastic washer; 58. a piston expansion ring; 59. a piston seal ring; 60. a pipeline fixing clamp ring; 61. an air valve; 62. a bushing; 63. an O-shaped ring of the upper cylinder body; 64. an upper cylinder cover; 65. packing pressing sleeve; 66. a stud bolt; 67. a joint connection bolt; 68. a gas pipe; 69. a cylinder head; 70. a power supply; 71. an electric tracing control cabinet; 72. a heat trace line; 73. a gas line; 74. the air outlet is four-way.
Detailed Description
Example 1:
The well head supercharging device of the oil recovery that is widely used now mainly has following several problems: 1. the existing oil extraction wellhead has complex geographical environment, wide distribution area and large temperature fluctuation, and the supercharging equipment is difficult to work normally under the high-temperature or extremely cold condition. 2. The design volume of the booster pump is too small, but when the associated gas at the wellhead is too much, the associated gas cannot be compressed in time to boost pressure, and the gas lock phenomenon is easy to occur. 3. The production of associated gas at the oil production wellhead can be fluctuated, and the flow of the associated gas suddenly rises or falls, so that the normal use of the booster pump is affected. 4. The existing booster pump is low in service life because of lack of sufficient lubrication or maintenance, and the booster pump can be replaced or maintained only in half a year. In order to overcome the problems, the invention provides a device and a method for recovering associated gas linkage type piston pressurization of an oil production wellhead, which are shown in fig. 1-11, and the device is used for recovering casing gas generated by the oil production wellhead and pumping the casing gas into an oil pipeline for oil-gas mixed transportation.
The utility model provides an oil recovery well head associated gas interlock formula piston booster recovery unit, includes beam-pumping unit 1, connecting seat 2, sleeve gas booster pump 3, filter 4, inlet line 5, oil recovery well head 6, outlet line 7, christmas tree 23, atmospheric system, torch combustion system, gas outlet cross 24, pressure control system, flow control system and lubricating system; the pumping unit 1 is connected with the casing gas booster pump 3 through the connecting seat 2, the casing gas booster pump 3 is connected with the filter 4, the filter 4 is connected with the christmas tree 23 positioned in the oil extraction wellhead 6, and the air outlet pipe line 7 is connected with the air outlet of the casing gas booster pump 3; the gas outlet of the Christmas tree 23 is respectively connected with a pressure control system, a blow-down system and a torch burning system, and a flow control system is arranged between the pressure control system and the filter 4; the oil outlet of the Christmas tree 23 is respectively connected with a gate valve 25, oil-gas mixed transportation and compressed gas entering an oil transportation pipeline through an oil outlet four-way joint 74; an electric tracing system 16, a water-cooled cooler 15 and a ball valve 14 are arranged between the filter 4 and the casing gas booster pump 3; four air inlet pipelines are arranged on the casing gas booster pump 3, and each pipeline is provided with a one-way valve 12; the sleeve gas booster pump 3 is provided with a booster pump lubrication system; the sleeve gas booster pump 3 is connected with a pressurized gas buffer tank 10; the oil outlet of the pressurized gas buffer tank 10 enters the oil outlet four-way joint 74 through an oil pipeline through the water-cooled cooler 15, and a pressure gauge 27 is arranged on the oil pipeline.
As shown in fig. 1, an upper bracket of a casing gas booster pump 3 is arranged on a beam of a pumping unit 1 through a connecting seat 2, and a lower bracket of the casing gas booster pump 3 is arranged on a fixed seat. The associated gas piston booster pump pumps and compresses the casing gas by means of the power of the pumping unit, so that the purpose of boosting the casing gas is achieved.
As shown in fig. 2, after the associated gas is extracted from the casing of the oil production well, the associated gas is conveyed to an emptying system, a torch burning system or a pressurizing recovery system through a gas outlet four-way 24, and the associated gas metered by a flow pressure gauge 22 sequentially enters a pressure control system and a flow control system. If the associated gas meets the supercharging recovery condition, the associated gas is conveyed to the gas filter 4, and the clean associated gas filtered by the filter is conveyed to the temperature control system for temperature adjustment. The temperature-regulated associated gas enters the pump through four air inlet pipelines of the casing gas booster pump 3 to be boosted, then enters the pressurized gas buffer tank 10 to be buffered, and the boosted associated gas flows through the temperature control system again to be cooled, so that the temperature of the associated gas is ensured not to exceed a specified temperature range, and the pressurized associated gas is introduced into an oil pipeline to be mixed and conveyed after pressure measurement. If pressurization is not needed or the booster pump is overhauling, associated gas is directly connected to the bypass pipeline and is input into the oil pipeline for output after passing through the pressure reducing valve 26. The lubrication system automatically lubricates the associated gas booster pump and the pumping unit, and prolongs the service lives of the booster pump and the pumping unit.
Example 2:
Based on embodiment 1, the electric tracing system 16 in this embodiment at least includes a power supply 70, an electric tracing control cabinet 71, a heat tracing line 72 and a gas pipeline 73, the electric tracing control cabinet 71 is connected with the gas pipeline 73 through the heat tracing line 72, and the power supply 70 is electrically connected with the electric tracing control cabinet 71.
As shown in fig. 2, the temperature control system is mainly composed of a water-cooled cooler 15 and an electric tracing system 16. The associated gas in the gas pipeline is cooled or heated by changing the power of the water-cooled cooler 15 or the electric tracing system 16, so that the temperature is kept within the normal working temperature range of the booster pump.
The pressure control system at least comprises a flow pressure gauge 22, a pressure shut-off valve 20, a gas pressure controller 21 and a pressure reducing valve 26, wherein the pressure shut-off valve 20 is arranged on the gas pressure controller 21, and the pressure reducing valve 26 is arranged between an inlet of the pressure shut-off valve 20 and an oil pipeline; the flow control system at least comprises a gas flow controller 17, a flow shutoff valve 18 and a throttle valve 19, wherein the throttle valve 19 and the gas flow controller 17 are respectively connected with an outlet of a gas pressure controller 21, and the gas flow controller 17 is provided with the flow shutoff valve 18.
As shown in fig. 3, the pressure control system is composed of at least a flow pressure gauge 22, a pressure shut-off valve 20, a gas pressure controller 21, and a pressure reducing valve 26. When the pressure control device works normally, associated gas enters the pressure shutoff valve 20 through the air inlet pipeline after being metered, the gas pressure controller 21 controls the pressure shutoff valve 20 according to the measurement data of the flow pressure gauge 22, and if the air inlet pressure of the associated gas is larger than the minimum specified pressure of oil-gas mixed transportation or the pressure of the associated gas after being pressurized is larger than the maximum specified pressure of oil-gas mixed transportation, the pressure shutoff valve 20 is controlled to be turned off, the ball valve of the bypass pipeline is opened, and the associated gas enters the pressure reducing valve 26 to be depressurized and then is input into the oil pipe for mixed transportation.
As shown in fig. 3, the flow control system includes at least a gas flow controller 17, a flow shutoff valve 18, and a throttle valve 19. The associated gas enters the flow control system after coming out of the pressure control system, the gas flow controller 17 controls the flow shutoff valve according to data measured by the flowmeter 22, if the associated gas flow is greater than the specified working flow of the booster pump, the flow shutoff valve 19 is controlled to be turned off, and the associated gas flows to the booster pump after being throttled by the throttle valve 19 connected in parallel.
The lubricating system at least comprises a lubricating oil pump 8, a lubricating oil storage tank 9, a lubricating oil pipeline 11 and a lubricating oil pool 13; the lubricating oil pump 8 is connected with the lubricating oil storage tank 9, the lubricating oil storage tank 9 is respectively connected with the lubricating oil pool 13 and the casing gas booster pump 3 through the lubricating oil pipeline 11, and the lubricating oil pool 13 is arranged below the casing gas booster pump 3.
As shown in fig. 2, the lubrication system is mainly composed of a lubrication pump 8, a lubrication oil reservoir 9, a lubrication oil line 11, and a lubrication oil sump 14. The lubricating oil pump 8 pumps the lubricating oil in the lubricating oil storage tank 9 into the associated gas booster pump 3 for lubrication, a lubricating oil pool 14 is arranged below the associated gas booster pump 3 and is specially used for receiving the lubricating oil flowing out of a lubricating oil outlet below the booster pump, and the precipitated and filtered lubricating oil is input into the lubricating oil storage tank 9 again through a lubricating oil pipeline 11 for the next reuse.
The sleeve gas booster pump 3 at least comprises a wellhead booster pump upper and lower joint connection structure, a cylinder cover and cylinder head connection fixing structure, a booster pump sealing structure and a booster pump gas pipe structure.
The upper and lower joint connecting structure of the wellhead booster pump at least comprises a booster pump upper bracket 28, a hexagonal head bolt 29, a nut 30, a gasket 31, a baffle 32, a cotter pin 33, a non-fixed partition ring 34, a joint bearing 35, a pin shaft 36, a cylinder cover lug 37, a connecting lug 38 and a locking nut 39; the booster pump upper bracket 28 is connected with the booster pump through a cylinder cover support lug 37, the cylinder cover support lug 37 is connected with a connecting support lug 38 through an opening pin 33 in a cold-fitting manner, and empty cavities are formed in the cylinder cover support lug 37 and the connecting support lug 38; the outermost layer of the cavity is a cotter pin 33, the middle of the cavity is a rotatable knuckle bearing 35, the innermost layer is a pin shaft 36, and a non-fixed partition ring 34 is arranged in the middle of each support lug to prevent the support lugs from being in direct contact; the outside of the two ends of the cotter pin 33 is provided with a baffle plate 32, the baffle plate 32 is connected by a hexagon head bolt 29 penetrating through a pin shaft 36 and a nut 30, and gaskets are arranged between the bolt and the nut.
The connecting and fixing structure of the cylinder cover and the cylinder head at least comprises a packing plate 40, an inner hexagon bolt 41, equal-length stud bolts 42, an inner packing 43, a booster pump cylinder body 44, a bushing 62, an upper cylinder body O-shaped ring 63, an upper cylinder cover 64, a packing pressing sleeve 65, stud bolts 66 and a cylinder head 69; the packing pressing sleeve 65 is arranged between the packing plate 40 and the upper cylinder cover 64, and the packing plate 40 and the upper cylinder cover 64 are fastened and connected through stud bolts 66; the upper cylinder cover 64 is connected with the booster pump cylinder body 44 through the equal-length stud bolts 42, and the upper cylinder cover 64 is connected with the upper cylinder head 69 through the socket head cap bolts 41; three annular grooves are arranged between the cylinder head 69 and the booster pump cylinder body 44, and an upper cylinder body O-shaped ring 63 is arranged in the middle annular groove; an inner packing 43 is provided between the cylinder 69 and the piston rod 47, and a bush 62 is provided below the inner packing 43.
The sealing structure of the booster pump at least comprises a booster pump cylinder body 44, a piston rod 47, a piston 49, a piston O-ring 50, a piston lock nut 52, an elastic washer 57, a piston expansion ring 58 and a piston sealing ring 59; the periphery of the piston 49 is provided with 5 annular grooves, a piston sealing ring 59 and a piston expansion ring 58 are sleeved in the annular grooves, wherein the piston sealing ring 59 is arranged on the outer layer, and the piston expansion ring 58 is arranged on the inner layer; the piston rod 47 and the piston 49 are connected through a piston lock nut 52 at the bottom, and an elastic washer 57 is arranged in the middle; the piston rod 47 inside the piston 49 has 3 annular grooves, and the piston O-ring 50 is installed in each of the 3 annular grooves.
The booster pump gas pipe structure at least comprises a booster pump cylinder body 44, a gas pipe body 45, a compression spring 46, a piston rod 47, a pipe fixing clamp ring 60 and a gas valve 61; the gas pipeline pipe body 45 is positioned on the booster pump cylinder body 44, and the pipeline fixing clamp ring 60 is welded inside the gas pipeline pipe body 45; the pipeline fixing clamp ring 60 is connected with the compression spring 46 through the air valve 61, and the compression spring 46 is positioned inside the gas pipeline body 45; the piston rod 47 is located in the center of the booster pump cylinder 44.
As shown in fig. 4, the casing gas booster pump 3 mainly comprises an upper and lower joint connection structure of the associated gas wellhead booster pump, a connection fixing structure of a cylinder cover and a cylinder head, a sealing structure of the booster pump and a booster pump gas pipe structure.
As shown in fig. 5, the wellhead booster pump up-down articulation structure comprises: booster pump upper bracket 28, hex head bolt 29, nut 30, washer 31, baffle 32, cotter pin 33, non-fixed partition ring 34, knuckle bearing 35, pin 36, cylinder head lugs 37, connection lugs 38 and lock nut 39. The upper support 28 of the booster pump is connected with the booster pump through a cylinder cover support lug 37, the cylinder cover support lug 37 is connected with a connecting support lug 38 through an opening pin 33 in a cold-fitting manner, and empty cavities are formed in the cylinder cover support lug 37 and the connecting support lug 38; the outmost layer of the cavity is a cotter pin 33, the middle of the cavity is a rotatable knuckle bearing 35, the innermost layer is a pin shaft 36, and a non-fixed partition ring 34 is arranged in the middle of each support lug to avoid direct contact of the support lugs and reduce sliding friction; the outer sides of the two ends of the cotter pin 33 are provided with a baffle plate 32 for dust prevention, the baffle plate 32 is connected by a hexagon head bolt 29 penetrating through a pin shaft 36 and a nut 30, and gaskets are arranged between the bolts and the nuts.
As shown in fig. 6, the connection fixing structure of the cylinder head and the cylinder head includes: the packing plate 40, socket head cap bolts 41, equal length stud bolts 42, internal packing 43, booster pump cylinder block 44, bushing 62, upper cylinder block O-ring 63, upper cylinder head 64, packing press sleeve 65, stud bolts 66 and cylinder head 69. A packing press sleeve 65 is arranged between the packing plate 40 and the upper cylinder cover 64, and the packing press sleeve and the upper cylinder cover are fastened and connected by a stud 66; the upper cylinder cover 64 is connected with the booster pump cylinder body 44 through the equal-length stud bolts 42, and the upper cylinder cover 64 is connected with the upper cylinder head 69 through the socket head cap bolts 41; three annular grooves are arranged between the cylinder head 69 and the booster pump cylinder body 44, and an upper cylinder body O-shaped ring 63 is arranged in the middle to increase the structural tightness; an inner packing 43 is arranged between the cylinder 69 and the piston rod 47, and is used for reducing friction force between the piston rod and the cylinder, increasing sealing performance, and a lining 62 is arranged below the inner packing 43 to play a role in sealing.
As shown in fig. 7, the sealing structure of the booster pump includes: booster pump cylinder 44, piston rod 47, piston 49, piston O-ring 50, piston lock nut 52, spring washer 57, piston expander 58, and piston seal ring 59. The periphery of the piston 49 is provided with 5 annular grooves, a piston sealing ring 59 and a piston expansion ring 58 are sleeved in the piston, wherein the piston sealing ring 59 is arranged on the outer layer, the piston expansion ring 58 is arranged on the inner layer, and the piston can be sealed in the up-and-down operation of the cylinder body through the piston expansion rings and the piston sealing rings of the 5 annular grooves; the piston rod 47 is connected with the piston 49 through a piston lock nut 52 at the bottom, and an elastic washer 57 is arranged in the middle to play a role in locking; the piston rod 47 inside the piston 49 has 3 annular grooves, and a piston O-ring 50 is installed inside the annular grooves to increase the sealing performance between the piston and the piston rod.
As shown in fig. 9, the booster pump gas delivery pipe structure includes: booster pump cylinder 44, gas line pipe 45, compression spring 46, piston rod 47, line retainer ring 60, and gas valve 61. The pipeline fixing clamp ring 60 is welded inside the gas pipeline body 45 and is of a fixed structure; when the air is introduced, the air pressure outside the piston pump is high, the compression spring 46 is pushed inwards, the air inlet valve 61 is opened, and the air enters the pump; when the air is exhausted, the internal air pressure of the piston pump is large, the compression spring 46 is pushed outwards, the air outlet valve 61 is opened, and the air is exhausted outwards.
A method for recovering associated gas of an oil extraction wellhead by linkage type piston pressurization specifically comprises the following steps:
After the associated gas is extracted from the oil well casing, the associated gas is conveyed to an emptying system, a torch burning system or a pressurizing recovery system through a gas outlet four-way 24, and the associated gas subjected to pressure and flow metering sequentially enters a pressure control system and a flow control system; if the associated gas meets the supercharging recovery condition, the associated gas is filtered by a gas filter 4 and then is conveyed to a temperature control system consisting of an electric heat tracing system 16 and a water-cooled cooler 15 for temperature adjustment; the temperature-regulated associated gas enters a pump through four air inlet pipelines of a casing gas booster pump 3 to be boosted, then enters a pressurized gas buffer tank 10 to be buffered, and the boosted associated gas flows through a temperature control system again to perform temperature control operation, so that the temperature of the associated gas is ensured not to exceed a specified temperature range, and the associated gas is introduced into an oil pipeline for mixed transportation after pressure measurement; if the pressurization is not needed or the booster pump is overhauling, the associated gas is directly connected to the bypass pipeline and is input into the oil pipeline for external transportation after passing through the pressure reducing valve 26; the lubrication system automatically lubricates the associated gas booster pump and the pumping unit.
As shown in fig. 1 and 2, an upper bracket of the casing gas booster pump 3 is arranged on a walking beam of the pumping unit 1 through a connecting seat 2, and a lower bracket of the casing gas booster pump 3 is arranged on a fixed seat. The associated gas piston booster pump pumps and compresses the casing gas by means of the power of the pumping unit, so that the purpose of boosting the casing gas is achieved. After the associated gas is extracted from the oil well casing, the associated gas is conveyed to an emptying system, a torch burning system or a pressurizing recovery system through a gas outlet four-way joint 24, and the associated gas metered by a flow pressure gauge 22 sequentially enters a pressure control system and a flow control system. If the associated gas meets the supercharging recovery condition, the associated gas is conveyed to the gas filter 4, and the clean associated gas filtered by the filter is conveyed to the temperature control system for temperature adjustment. The temperature-regulated associated gas enters the pump through four air inlet pipelines of the casing gas booster pump 3 to be boosted, then enters the pressurized gas buffer tank 10 to be buffered, and the boosted associated gas flows through the temperature control system again to be cooled, so that the temperature of the associated gas is ensured not to exceed a specified temperature range, and the pressurized associated gas is introduced into an oil pipeline to be mixed and conveyed after pressure measurement. If pressurization is not needed or the booster pump is overhauling, associated gas is directly connected to the bypass pipeline and is input into the oil pipeline for output after passing through the pressure reducing valve 26. The lubrication system automatically lubricates the associated gas booster pump and the pumping unit, and prolongs the service lives of the booster pump and the pumping unit.
As shown in FIG. 2, the booster pump air inlet line 5, the air outlet line 7, the bypass line, the booster line, the post-booster line and the external transmission line are all air transmission lines. When the booster pump works normally, associated gas enters a pressure control system and a flow control system through an air inlet pipeline 5, after being treated, the associated gas enters a booster pipeline through temperature adjustment of the temperature control system, the associated gas is conveyed to the booster pump through the booster pipeline, is conveyed to a post-booster pipeline after being subjected to secondary booster, and is conveyed to the outside through pressure such as an oil conveying pipeline after temperature adjustment of the temperature control system; if the booster pump cannot work normally or the pressure of associated gas is too high, the associated gas does not need to be pressurized, the associated gas can be input into the bypass pipeline through the air inlet pipeline 5 and then is directly pressed into the oil pipeline for output; if the supercharging device and the bypass pipeline are in fault, associated gas can be input into the emptying system through the air inlet pipeline 5 for emptying or can be input into the torch combustion system for combustion and emission operation, so that the safety of the whole device is ensured. The venting system and the flare combustion system are both prior art.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention. Structural components and system methods thereof, which are not described in detail in this embodiment, are all prior art, and the present invention will not be further described.
Claims (9)
1. A method for recovering associated gas of an oil extraction wellhead by linkage type piston pressurization is characterized by comprising the following steps of: the oil extraction wellhead associated gas linkage type piston pressurizing recovery device comprises an oil pumping unit (1), a connecting seat (2), a specific casing gas booster pump (3), a filter (4), an air inlet pipeline (5), an oil extraction wellhead (6), an air outlet pipeline (7), an oil extraction tree (23), an emptying system, a torch combustion system, an oil outlet four-way (24), a pressure control system, a flow control system and a lubrication system; the oil pumping unit (1) is connected with the specific casing gas booster pump (3) through the connecting seat (2), the specific casing gas booster pump (3) is connected with the filter (4), the filter (4) is connected with the christmas tree (23) positioned in the oil extraction wellhead (6), and the air outlet pipeline (7) is connected with the air outlet of the specific casing gas booster pump (3); the gas outlet of the Christmas tree (23) is respectively connected with a pressure control system, a blow-down system and a torch combustion system, and a flow control system is arranged between the pressure control system and the filter (4); the oil outlet of the christmas tree (23) is respectively connected with a gate valve (25), an oil-gas mixed transportation pipeline and a compressed gas inlet pipeline through an oil outlet four-way valve (24); an electric tracing system (16), a water-cooled cooler (15) and a ball valve (14) are arranged between the filter (4) and the specific casing gas booster pump (3); four air inlet pipelines are arranged on the specific casing gas booster pump (3), and each pipeline is provided with a one-way valve (12); the specific casing gas booster pump (3) is provided with a booster pump lubrication system; the specific casing gas booster pump (3) is connected with a pressurized gas buffer tank (10); the oil outlet of the pressurized gas buffer tank (10) enters an oil outlet four-way joint (24) through an oil pipeline by a water-cooled cooler (15), and a pressure gauge (27) is arranged on the oil pipeline;
the oil extraction wellhead associated gas linkage type piston pressurizing recovery method comprises the following specific steps:
After the associated gas is extracted from the oil well casing, the associated gas is conveyed to an emptying system, a torch burning system or a pressurizing recovery system through a gas outlet four-way (74), and the associated gas subjected to pressure and flow metering sequentially enters a pressure control system and a flow control system; if the associated gas meets the supercharging recovery condition, the associated gas is filtered by a gas filter (4) and then is conveyed to a temperature control system consisting of an electric tracing system (16) and a water-cooled cooler (15) for temperature adjustment; the temperature-regulated associated gas enters a pump from four air inlet pipelines of a specific casing gas booster pump (3) to be pressurized, then enters a pressurized gas buffer tank (10) to be buffered, and the pressurized associated gas flows through a temperature control system again to perform temperature control operation, so that the temperature of the associated gas is ensured not to exceed a specified temperature range, and is introduced into an oil pipeline for mixed transportation after pressure measurement; if the pressurization is not needed or the booster pump is overhauling, the associated gas is directly connected with a bypass pipeline and is input into an oil pipeline for external transportation after passing through a pressure reducing valve (26); the lubrication system automatically lubricates the associated gas booster pump and the pumping unit.
2. The method for recovering associated gas from an oil recovery wellhead by linkage piston pressurization according to claim 1, wherein the method comprises the following steps: the electric tracing system (16) at least comprises a power supply (70), an electric tracing control cabinet (71), a heat tracing line (72) and a gas pipeline (73), wherein the electric tracing control cabinet (71) is connected with the gas pipeline (73) through the heat tracing line (72), and the power supply (70) is electrically connected with the electric tracing control cabinet (71).
3. The method for recovering associated gas from an oil recovery wellhead by linkage piston pressurization according to claim 1, wherein the method comprises the following steps: the pressure control system at least comprises a flow pressure gauge (22), a pressure shut-off valve (20), a gas pressure controller (21) and a pressure reducing valve (26), wherein the pressure shut-off valve (20) is arranged on the gas pressure controller (21), and the pressure reducing valve (26) is arranged between an inlet of the pressure shut-off valve (20) and an oil pipeline; the flow control system at least comprises a gas flow controller (17), a flow shutoff valve (18) and a throttle valve (19), wherein the throttle valve (19) and the gas flow controller (17) are respectively connected with an outlet of a gas pressure controller (21), and the gas flow controller (17) is provided with the flow shutoff valve (18).
4. The method for recovering associated gas from an oil recovery wellhead by linkage piston pressurization according to claim 1, wherein the method comprises the following steps: the lubricating system at least comprises a lubricating oil pump (8), a lubricating oil storage tank (9), a lubricating oil pipeline (11) and a lubricating oil tank (13); the lubricating oil pump (8) is connected with the lubricating oil storage tank (9), the lubricating oil storage tank (9) is respectively connected with the lubricating oil tank (13) and the specific casing gas booster pump (3) through the lubricating oil pipeline (11), and the lubricating oil tank (13) is arranged below the specific casing gas booster pump (3).
5. The method for recovering associated gas from an oil recovery wellhead by linkage piston pressurization according to claim 1, wherein the method comprises the following steps: the specific casing gas booster pump (3) at least comprises a wellhead booster pump upper and lower joint connection structure, a cylinder cover and cylinder head connection fixing structure, a booster pump sealing structure and a booster pump gas pipe structure.
6. The method for recovering associated gas from oil recovery wellhead by linkage piston pressurization according to claim 5, wherein the method comprises the following steps: the upper and lower joint connecting structure of the wellhead booster pump at least comprises a booster pump upper bracket (28), a hexagonal head bolt (29), a nut (30), a gasket (31), a baffle plate (32), a cotter pin (33), a non-fixed partition ring (34), a joint bearing (35), a pin shaft (36), a cylinder cover support lug (37), a connecting support lug (38) and a locking nut (39); the booster pump upper bracket (28) is connected with the booster pump through a cylinder cover support lug (37), the cylinder cover support lug (37) is connected with the connecting support lug (38) through a cotter pin (33) in a cold-fitting manner, and empty cavities are formed in the cylinder cover support lug (37) and the connecting support lug (38); the outermost layer of the cavity is a cotter pin (33), the middle of the cavity is a rotatable knuckle bearing (35), the innermost layer is a pin shaft (36), and a non-fixed partition ring (34) is arranged in the middle of each support lug to prevent the support lugs from being in direct contact; baffle plates (32) are arranged on the outer sides of two ends of the cotter pin (33), the baffle plates (32) are connected through hexagon bolts (29) penetrating through the pin shafts (36) and nuts (30), and gaskets are arranged between the bolts and the nuts.
7. The method for recovering associated gas from oil recovery wellhead by linkage piston pressurization according to claim 5, wherein the method comprises the following steps: the connecting and fixing structure of the cylinder cover and the cylinder head at least comprises a packing plate (40), an inner hexagon bolt (41), equal-length stud bolts (42), internal packing (43), a booster pump cylinder body (44), a bushing (62), an upper cylinder body O-shaped ring (63), an upper cylinder cover (64), a packing pressing sleeve (65), stud bolts (66) and a cylinder head (69); the packing pressing sleeve (65) is arranged between the packing plate (40) and the upper cylinder cover (64), and the packing plate (40) and the upper cylinder cover (64) are fastened and connected through stud bolts (66); the upper cylinder cover (64) is connected with the booster pump cylinder body (44) through equal-length stud bolts (42), and the upper cylinder cover (64) is connected with the upper cylinder head (69) through inner hexagon bolts (41); three annular grooves are arranged between the cylinder head (69) and the booster pump cylinder body (44), and an upper cylinder body O-shaped ring (63) is arranged in the middle annular groove; an inner packing (43) is arranged between the cylinder body (69) and the piston rod (47), and a bushing (62) is arranged below the inner packing (43).
8. The method for recovering associated gas from oil recovery wellhead by linkage piston pressurization according to claim 5, wherein the method comprises the following steps: the sealing structure of the booster pump at least comprises a booster pump cylinder body (44), a piston rod (47), a piston (49), a piston O-shaped ring (50), a piston lock nut (52), an elastic washer (57), a piston expansion ring (58) and a piston sealing ring (59); the periphery of the piston (49) is provided with 5 annular grooves, a piston sealing ring (59) and a piston expansion ring (58) are sleeved in the annular grooves, wherein the piston sealing ring (59) is arranged on the outer layer, and the piston expansion ring (58) is arranged on the inner layer; the piston rod (47) is connected with the piston (49) through a piston lock nut (52) at the bottom, and an elastic washer (57) is arranged in the middle; a piston rod (47) inside the piston (49) is provided with 3 annular grooves, and piston O-shaped sealing rings (50) are arranged in the 3 annular grooves.
9. The method for recovering associated gas from oil recovery wellhead by linkage piston pressurization according to claim 5, wherein the method comprises the following steps: the booster pump gas transmission pipe structure at least comprises a booster pump cylinder body (44), a gas transmission pipe body (45), a compression spring (46), a piston rod (47), a pipe fixing clamp ring (60) and a gas valve (61); the gas transmission pipeline body (45) is positioned on the booster pump cylinder body (44), and the pipeline fixing clamp ring (60) is welded in the gas transmission pipeline body (45); the pipeline fixing clamp ring (60) is connected with the compression spring (46) through the air valve (61), and the compression spring (46) is positioned in the gas pipeline body (45); the piston rod (47) is positioned in the center of the booster pump cylinder body (44).
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| CN110714919B (en) * | 2019-11-21 | 2023-10-13 | 西安德林石油工程有限公司 | Oilfield associated gas recovery method and device |
| CN111927424B (en) * | 2020-09-25 | 2020-12-11 | 胜利油田高原石油装备有限责任公司 | A heavy hammer balance oil pumping unit |
| CN112066258A (en) * | 2020-09-29 | 2020-12-11 | 陕西星辰石油科技有限责任公司 | An oil well associated gas recovery booster device |
| CN119754743B (en) * | 2025-03-10 | 2025-08-22 | 新疆金石钻采设备有限公司 | A mechanically pressurized wellhead device for producing heavy oil based on electric heating |
| CN120251167B (en) * | 2025-04-29 | 2025-11-07 | 成都鼎胜科技有限公司 | Low-efficiency well negative pressure yield-increasing integrated device |
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| US8733384B2 (en) * | 2010-10-28 | 2014-05-27 | Gas Technology Institute | Internal pressure boost system for gas utility pipelines |
| CN202031548U (en) * | 2011-03-31 | 2011-11-09 | 西安长庆科技工程有限责任公司 | Device for recovering gas in wellhead and well group casing of oilfield |
| CN202546266U (en) * | 2012-02-03 | 2012-11-21 | 深圳乐满油气技术有限公司 | Oil-gas mixture vortex delivery system for oil well sleeve gas recovery and crude oil delivery |
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