CN210290030U - Auxiliary liquid drainage device for natural gas well - Google Patents
Auxiliary liquid drainage device for natural gas well Download PDFInfo
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- CN210290030U CN210290030U CN201921340862.3U CN201921340862U CN210290030U CN 210290030 U CN210290030 U CN 210290030U CN 201921340862 U CN201921340862 U CN 201921340862U CN 210290030 U CN210290030 U CN 210290030U
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- 239000007788 liquid Substances 0.000 title claims abstract description 354
- 239000002343 natural gas well Substances 0.000 title claims abstract description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 148
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 98
- 239000003345 natural gas Substances 0.000 claims abstract description 74
- 239000003921 oil Substances 0.000 claims abstract description 54
- 230000006835 compression Effects 0.000 claims abstract description 41
- 238000007906 compression Methods 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims description 71
- 238000000926 separation method Methods 0.000 claims description 57
- 238000007789 sealing Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 14
- 238000006073 displacement reaction Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 241000521257 Hydrops Species 0.000 description 4
- 206010030113 Oedema Diseases 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses an auxiliary drainage device that natural gas well was used, including natural gas compression device, still include hydraulic oil pump, hydraulic tank and flowing back pump, the oil pipe and the hydraulic tank intercommunication of advancing of hydraulic oil pump, the hydraulic oil pump passes through the natural gas compression device drive, and the hydraulic oil pump provides power for the flowing back pump, the flowing back pump is used for the pressure boost of liquid suction and flowing back. The utility model discloses can utilize natural gas compression device for power and need not power consumptive, have big discharge capacity, work efficiency is high, the high drain of economic nature.
Description
Technical Field
The utility model relates to a in oil gas field development technical field, concretely relates to supplementary drain that natural gas well was used.
Background
In the production of natural gas, gas well products include, in addition to natural gas, a large amount of liquids, which typically include field water and liquid hydrocarbons. In the existing exploitation technology, a well site does not have the capacity of processing liquid, the liquid needs to be collected and transported to a processing station for processing, a gas-liquid separation tank is generally arranged at the periphery of a well head, gas-liquid separation of a gas well product is realized through the gas-liquid separation tank, and then natural gas and the liquid are respectively pressurized and then introduced into a pipe network to be collected and transported to the processing station for processing. Well site natural gas pressurization generally adopts the natural gas engine to drive the natural gas compressor compression pressure boost. For liquid pressurization, as the pressure of liquid coming out along with natural gas is not enough to enter a pipeline, the liquid needs to be pressurized to a high pressure before being introduced into the pipeline to realize liquid gathering and transportation, the existing common water pump cannot meet the requirement of high-pressure output, and although the existing partial natural gas compressor has an auxiliary liquid drainage function of utilizing the natural gas to pressurize the liquid, the liquid drainage capacity is small, and the production requirement is difficult to meet. In addition, the existing plunger pumps can meet the output pressure requirement, but the plunger pumps are generally high in cost and generally need power supply, well sites are mostly located in remote areas and are not electrified, a generator needs to be additionally used for power supply, and the economical efficiency is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that in a natural gas well site, the existing partial natural gas compressor realizes liquid drainage through a technological means, but the liquid drainage capacity is small, the liquid amount is large, and the production requirement is difficult to meet; or the technical problems of power supply, high cost and poor economical efficiency due to the use of a plunger pump, and aims to provide a liquid discharge device which uses a natural gas compression device as power, does not need power consumption, has large discharge capacity, and has high working efficiency and high economical efficiency.
The utility model discloses a following technical scheme realizes: the utility model provides an auxiliary drainage device that natural gas well was used, includes natural gas compression device, still includes hydraulic oil pump, hydraulic tank and flowing back pump, the oil pipe that advances of hydraulic oil pump and hydraulic tank intercommunication, the hydraulic oil pump passes through the natural gas compression device drive, and the hydraulic oil pump provides power for the flowing back pump, the flowing back pump is used for with liquid suction pressure boost and flowing back.
In order to realize the flowing back of natural gas well site high efficiency, high economic nature, the utility model discloses a natural gas compression device drive hydraulic oil pump drives the positive displacement pump after the hydraulic oil pressurization in with the hydraulic oil case through the hydraulic oil pump, and the positive displacement pump communicates with the device of storage liquid, like liquid storage pot, gas-liquid separation jar etc. the positive displacement is again like the pipe network after the pressurization in the liquid suction positive displacement pump in the device of positive displacement pump with storage liquid, and the collection is defeated to being handled to the processing station. The utility model provides a natural gas compression device includes integral natural gas compressor and split type natural gas compressor, all has controlling means moreover on the natural gas compression device. The integral natural gas compressor is a natural gas compressor integrating an engine part and a compressor part, the split natural gas compressor is a natural gas compressor integrating an engine and a compressor which are independent of each other, and power output by the engine part or the engine is driven to drive the hydraulic oil pump through belt transmission no matter the integral natural gas compressor or the split natural gas compressor is used for driving the hydraulic oil pump. In the natural gas well site, the natural gas pressure boost generally adopts the compression pressure boost of natural gas compression equipment, the utility model provides a natural gas compression device also is used for the natural gas compression pressure boost equally. Compared with the prior art, the utility model adopts the natural gas compression device as a power source, reasonably utilizes the power output by the natural gas compression device, replaces the use of electric energy, does not need to additionally add a generator, saves the production cost and has high economy; meanwhile, liquid produced by the gas well is pressurized and discharged by utilizing the hydraulic oil pump, the hydraulic oil tank and the liquid discharge pump, the size of the liquid discharge pump and the size of the second hydraulic oil interface are controlled when the liquid discharge pump is manufactured according to actual production requirements, and the pressurization requirement and the displacement requirement of liquid gathering and transportation can be met by only using one liquid discharge pump; compared with the existing partial natural gas compressor with auxiliary liquid drainage capacity, the liquid drainage pump has the function of liquid drainage, and the liquid drainage efficiency is greatly improved.
Further, the liquid discharge pump comprises a shell, a sealing element and a piston rod, wherein the shell comprises a large-diameter section and a small-diameter section, the sealing element is arranged at the joint of the large-diameter section and the small-diameter section, the small-diameter section and the sealing element form an oil pressure cavity, and the large-diameter section and the sealing element form a liquid discharge cavity; the piston rod is arranged on the sealing element, a small piston and a large piston are arranged at two ends of the piston rod, the small piston can freely slide in the oil pressure cavity, and the large piston can freely slide in the liquid discharge cavity;
the shell is further provided with a first hydraulic oil interface, a second hydraulic oil interface, a liquid inlet and a liquid outlet, the first hydraulic oil interface and the second hydraulic oil interface are arranged on the oil pressure cavity and are respectively located on two sides of the small piston, and the liquid inlet and the liquid outlet are arranged on the liquid outlet cavity and are respectively located on two sides of the large piston.
Further, the liquid inlet includes first inlet, second inlet, the leakage fluid dram includes first liquid outlet and second liquid outlet, first inlet and first liquid outlet are located one side of big piston, second inlet and second liquid outlet are located the opposite side of big piston.
Further, still include the feed liquor check valve and go out the liquid check valve, the feed liquor check valve sets up on the pipeline of first inlet, second inlet for during restriction liquid can only one-way inflow liquid discharge chamber, it sets up on the pipeline of first liquid outlet and second liquid outlet to go out the liquid check valve, is used for restricting liquid can only one-way outflow liquid discharge chamber.
In order to realize liquid drainage, the technical scheme is that a liquid drainage pump is arranged, a first hydraulic oil interface and a second hydraulic oil interface on the liquid drainage pump can be used for feeding in and discharging out oil, when the hydraulic oil pump leads hydraulic oil into an oil pressure cavity from the first hydraulic oil interface, a small piston is pushed to move leftwards, the small piston is connected with a piston rod, and a large piston moves leftwards together, a negative pressure region is formed in the liquid drainage cavity and on the right side of the large piston, and a liquid inlet one-way valve is arranged on a pipeline of the first liquid inlet and the second liquid inlet and used for limiting liquid to flow into the liquid drainage cavity in one way only, liquid outlet one-way valves are arranged on pipelines of the first liquid outlet and the second liquid outlet and used for limiting liquid to flow out of the liquid drainage cavity in one way only, and liquid in a liquid storage. When the hydraulic oil pump leads hydraulic oil into the oil pressure cavity from the second hydraulic oil interface, the small piston is pushed to move rightwards, the small piston is connected with the piston rod and the large piston to move rightwards together, the hydraulic oil in the oil pressure cavity flows back into the hydraulic oil tank through the first hydraulic oil interface, and liquid sucked in the liquid discharge cavity flows out from the first liquid outlet in a high-pressure state under the extrusion of the large piston; in the process that the large piston moves rightwards and discharges liquid, a negative pressure area is formed on the left side of the large piston, liquid in the liquid storage tank or the gas-liquid separation tank is sucked into the liquid discharge cavity through the first liquid inlet, and when the large piston moves leftwards, the process is repeated. So that the large piston sucks liquid and discharges liquid simultaneously every time it moves from the first action of the large piston to the suction of liquid. Compared with a plunger pump, the liquid discharge pump in the technical scheme has the advantages of simple structure, low cost, high working efficiency, no power consumption and high economy, and the liquid discharge pump can output liquid in a high-pressure state to meet the gathering and transportation requirements, and can simultaneously suck and discharge liquid by the action of the piston at every time. In addition, the liquid discharge pump in the technical scheme is not only suitable for liquid discharge of a natural gas well site, but also suitable for other liquid discharge occasions requiring high liquid output pressure, and when the liquid discharge pump is used in other occasions, other power equipment can be used for replacing a natural gas engine to serve as a power source.
The gas-liquid separation tank is used for separating gas and liquid produced by the gas well, storing hydraulic pressure and is communicated with the first liquid inlet and the second liquid inlet; the natural gas compression device is communicated with the gas-liquid separation tank and is used for sucking and pressurizing gas in the gas-liquid separation tank and then discharging the gas.
In order to separate gas and liquid produced by a gas well and further pressurize the gas and the liquid and then introduce the gas and the liquid into a pipe network to be collected and transported to a treatment station for treatment, the technical scheme is provided with a gas-liquid separation tank which is communicated with an oil pipe in the gas well, when the gas and the liquid flowing out of the oil pipe enter the gas-liquid separation tank, the gas is accumulated above the gas-liquid separation tank, the liquid is accumulated below the gas-liquid separation tank, and then a natural gas compression device pumps out and pressurizes the gas in the gas-liquid separation tank and then introduces the gas into the pipe network to be collected and transported to the treatment station. In this technical scheme, the gas-liquid separation jar plays the effect of separation gaseous phase and liquid phase, plays the effect of storing liquid simultaneously.
The oil pipe is a sleeve and an oil pipe used in gas lift drainage gas production in the prior art, the sleeve is sleeved outside the oil pipe, when the liquid level of accumulated liquid in a gas well is lower than the lower end of the oil pipe, the sleeve and the oil pipe are in a communicated state, and when the liquid level of accumulated liquid in the gas well is higher than the lower end of the oil pipe, the sleeve and the oil pipe are in an independent state of internal and external sealing. When the gas lift method is adopted, high-pressure gas is introduced into the casing, and liquid in the gas well is extruded out of the oil pipe, so that the purpose of water drainage and gas production is achieved.
The device further comprises a high liquid level switch, a low liquid level switch and a hydraulic valve group, wherein the high liquid level switch and the low liquid level switch are arranged on the gas-liquid separation tank and used for detecting the height of the liquid level in the gas-liquid separation tank; the hydraulic valve group is communicated with an oil outlet pipe of the hydraulic oil pump, is also communicated with the hydraulic oil tank and is simultaneously communicated with the first hydraulic oil interface and the second hydraulic oil interface.
In order to avoid in the gas-liquid separation jar liquid to amass fully, in time defeated to the processing station with liquid collection handles, set up high liquid level switch among this technical scheme, low liquid level switch for detect the liquid level height of liquid among the gas-liquid separation jar, set up hydraulic pressure valves among this technical scheme simultaneously, hydraulic pressure valves and hydraulic tank intercommunication are used for controlling the business turn over flow direction that hydraulic oil lets in the flowing back pump, connect and high liquid level switch, low liquid level switch and hydraulic pressure valves with the controlling means of natural gas compression device self among this technical scheme. In a normal state, the high liquid level switch and the low liquid level switch are in a normally open state, when the liquid level reaches the low liquid level switch, the low liquid level switch is in a closed state, the control device controls the hydraulic valve group to be not operated, the liquid discharge pump does not work, and meanwhile, hydraulic oil circulates between the hydraulic pump and the hydraulic oil tank; when the liquid level reaches the high liquid level switch, the high liquid level switch is in a closed state, the control device controls the hydraulic valve group to act, and the liquid discharge pump starts to work; when the liquid level is below the low liquid level switch again, and the low liquid level switch is in an off state, the control device controls the hydraulic valve group to act to enable the hydraulic valve group to recover the state before liquid drainage, so that liquid drainage is stopped, and meanwhile, hydraulic oil circulates between the hydraulic pump and the hydraulic oil tank.
Specifically, the utility model also discloses a method of utilizing supplementary flowing back device drainage gas production of natural gas engine, when the gas well exploitation is in middle and later stages, the hydrops is more, the hydrops liquid level has flooded oil pipe, with the oil pipe intercommunication in gas-liquid separation jar and the gas well, start natural gas compressor arrangement, utilize natural gas compressor arrangement to take out the gas in the gas-liquid separation jar and discharge after the pressurization, form negative pressure zone in the gas-liquid separation jar, because oil pipe intercommunication in gas-liquid separation jar and the gas well, pressure in the oil pipe is less than the pressure in the sleeve pipe, liquid in the gas well is in the oil pipe is inhaled the gas-liquid separation jar under the effect of pressure differential, realize the purpose of drainage gas production. Compared with the gas lift method in the prior art, the method omits the procedure of injecting high-pressure gas into the oil pipe and related equipment, is simple and easy to operate, has low cost, and can achieve the purpose of improving the yield of the gas well.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model adopts the natural gas compression device as a power source, reasonably utilizes the power output by the natural gas compression device, replaces the use of electric energy, does not need to additionally add a generator, saves the production cost and has high economical efficiency; meanwhile, liquid produced by the gas well is pressurized and discharged by utilizing the hydraulic oil pump, the hydraulic oil tank and the liquid discharge pump, the size of the liquid discharge pump and the size of the second hydraulic oil interface are controlled when the liquid discharge pump is manufactured according to actual production requirements, and the pressurization requirement and the discharge requirement of liquid gathering and transportation can be met by only using one liquid discharge pump; and the function of the drainage pump is drainage, thus greatly improving the drainage efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic view of the construction of a drainage pump;
reference numbers and corresponding part names in the drawings:
the natural gas compression device comprises a natural gas compression device, a hydraulic oil pump, a hydraulic valve group 3, a hydraulic oil tank 4, a gas-liquid separation tank 5, a high liquid level switch 6, a low liquid level switch 7, a liquid discharge pump 8, a liquid inlet check valve 9, a first hydraulic oil interface 10, an oil pressure cavity 11, a small piston 12, a piston rod 13, a sealing element 14, a first liquid inlet 15, a liquid discharge cavity 16, a second liquid inlet 17, a first liquid outlet 18, a second liquid outlet 19, a shell 22, a large piston 23, a second hydraulic oil interface 24 and a liquid outlet check valve 25.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Examples
As shown in fig. 1-2, an auxiliary drainage device for a natural gas well comprises a natural gas compression device 1, and further comprises a hydraulic oil pump 2, a hydraulic oil tank 4 and a drainage pump 8, wherein an oil inlet pipe of the hydraulic oil pump 2 is communicated with the hydraulic oil tank 4, the hydraulic oil pump 2 is driven by the natural gas compression device 1, the hydraulic oil pump 2 provides power for the drainage pump 8, and the drainage pump 8 is used for pumping, pressurizing and draining liquid.
In order to realize the flowing back of natural gas well site high efficiency, high economic nature, the utility model discloses a 1 drive hydraulic oil pump 2 of natural gas compression device drives the positive displacement pump 8 after the hydraulic oil pump 2 pressurizes hydraulic oil in with hydraulic tank 4, and the positive displacement pump 8 communicates with the device of storage liquid, like liquid storage pot, gas-liquid separation jar etc. the positive displacement is again like in the pipe network after the pressurization in the liquid suction positive displacement pump 8 among the device of positive displacement pump 8 with the storage liquid, and the collection is defeated to being handled to the processing station. The utility model provides a natural gas compression device 1 includes integral natural gas compressor and split type natural gas compressor, all has controlling means moreover on the natural gas compression device 1. The integral natural gas compressor is a natural gas compressor integrating an engine part and a compressor part, the split natural gas compressor is a natural gas compressor integrating an engine and a compressor independently, and power output by the engine part or the engine is driven to drive the hydraulic oil pump 2 through belt transmission no matter the integral natural gas compressor or the split natural gas compressor is used to drive the hydraulic oil pump 2. In the natural gas well site, the natural gas pressure boost generally adopts the compression pressure boost of natural gas compression equipment, the utility model provides a natural gas compression device 1 also is used for the natural gas compression pressure boost equally. Compared with the prior art, the natural gas compression device 1 is adopted as a power source, the power output by the natural gas compression device 1 is reasonably utilized to replace the use of electric energy, no additional generator is needed, the production cost is saved, and the economy is high; meanwhile, the liquid produced by the gas well is pressurized and discharged by the hydraulic oil pump 2, the hydraulic oil tank 4 and the liquid discharge pump 8, the size of a hydraulic oil interface, the size of a liquid discharge port and the like are controlled when the liquid discharge pump 8 is manufactured according to actual production requirements, the pressurization requirement and the discharge requirement of liquid gathering and transportation can be met by only one liquid discharge pump 8, compared with the plunger pump, the cost is greatly saved, the output pressure of the liquid discharge pump 8 is far higher than that of the plunger pump, and the economical efficiency is higher; compared with the existing partial natural gas compressor with auxiliary liquid discharge capacity, the liquid discharge pump 8 has the function of discharging liquid, and the liquid discharge efficiency is greatly improved.
Further, the liquid discharge pump 8 comprises a housing 22, a sealing element 14 and a piston rod 13, wherein the housing 22 comprises a large-diameter section and a small-diameter section, the sealing element 14 is arranged at the joint of the large-diameter section and the small-diameter section, the small-diameter section and the sealing element 14 form an oil pressure cavity 11, and the large-diameter section and the sealing element 14 form a liquid discharge cavity 16; the piston rod 13 is arranged on the sealing element 14, the two ends of the piston rod 13 are provided with a small piston 12 and a large piston 23, the small piston 12 can freely slide in the oil pressure cavity 11, and the large piston 23 can freely slide in the liquid discharge cavity 16;
the shell 22 is further provided with a first hydraulic oil interface 10, a second hydraulic oil interface 24, a liquid inlet and a liquid outlet, the first hydraulic oil interface 10 and the second hydraulic oil interface 24 are arranged on the oil pressure cavity 11 and are respectively located on two sides of the small piston 12, and the liquid inlet and the liquid outlet are arranged on the liquid outlet cavity 16 and are respectively located on two sides of the large piston 23.
Further, the liquid inlet includes a first liquid inlet 15 and a second liquid inlet 17, the liquid outlet includes a first liquid outlet 18 and a second liquid outlet 19, the first liquid inlet 15 and the first liquid outlet 18 are located on one side of the large piston 23, and the second liquid inlet 17 and the second liquid outlet 19 are located on the other side of the large piston 23.
Further, the liquid inlet check valve 9 and the liquid outlet check valve 25 are further included, the liquid inlet check valve 9 is arranged on the pipelines of the first liquid inlet 15 and the second liquid inlet 17 and used for limiting liquid to flow into the liquid discharging cavity 16 in a one-way mode, and the liquid outlet check valve 25 is arranged on the pipelines of the first liquid outlet 18 and the second liquid outlet 19 and used for limiting liquid to flow out of the liquid discharging cavity 16 in a one-way mode.
In order to realize liquid drainage, the liquid drainage pump 8 is arranged in the technical scheme, when the hydraulic oil pump 2 leads hydraulic oil into the oil pressure cavity 11 from the first hydraulic oil interface 10, the small piston 12 is pushed to move leftwards, the small piston 12 with the piston rod 13 and the large piston 23 move leftwards together, a negative pressure area is formed in the liquid drainage cavity 16 and on the right side of the large piston 23, as the liquid inlet one-way valve 9 is arranged on the pipeline of the first liquid inlet 15 and the second liquid inlet 17 and used for limiting liquid to only flow into the liquid drainage cavity 16 in one way, the liquid outlet one-way valve 25 is arranged on the pipeline of the first liquid outlet 18 and the second liquid outlet 19 and used for limiting liquid to only flow out of the liquid drainage cavity 16 in one way, and liquid in the liquid storage tank or the gas-liquid separation tank is sucked into the. When the hydraulic oil pump 2 leads hydraulic oil into the oil pressure cavity 11 from the second hydraulic oil interface 24, the small piston 12 is pushed to move rightwards, the small piston 12 is connected with the piston rod 13 and the large piston 23 to move rightwards together, the hydraulic oil in the oil pressure cavity 11 flows back into the hydraulic oil tank 4 through the first hydraulic oil interface 10, and liquid sucked in the liquid discharge cavity 16 flows out from the first liquid outlet 18 in a high-pressure state under the extrusion of the large piston 23; during the process that the large piston 23 moves rightwards and discharges liquid, a negative pressure area is formed on the left side of the large piston 23, liquid in the liquid storage tank or the gas-liquid separation tank is sucked into the liquid discharge cavity 16 through the first liquid inlet 15, and the process is repeated when the large piston 23 moves leftwards. Therefore, the large piston 23 performs suction and discharge simultaneously every time the large piston 23 moves since the large piston 23 first operates to suck liquid. Compared with a plunger pump, the liquid discharge pump 8 in the technical scheme has the advantages of simple structure, low cost, high working efficiency, no power consumption and high economy, the piston can simultaneously suck and discharge liquid at each action, hydraulic drive is utilized, and the liquid discharge pump 8 can also output liquid in a high-pressure state to meet the gathering and transportation requirements.
Further, the gas-liquid separation device comprises a gas-liquid separation tank 5, wherein the gas-liquid separation tank 5 is used for separating gas and liquid produced by a gas well, storing hydraulic pressure and simultaneously communicated with a first liquid inlet 15 and a second liquid inlet 17; the natural gas compression device 1 is communicated with the gas-liquid separation tank 5 and used for sucking and pressurizing gas in the gas-liquid separation tank 5 and then discharging the gas.
In order to separate gas and liquid produced by a gas well and further pressurize the gas and the liquid and then introduce the gas and the liquid into a pipe network to be collected and transported to a treatment station for treatment, the technical scheme is provided with a gas-liquid separation tank 5, the gas-liquid separation tank 5 is communicated with a sleeve in the gas well, when the gas and the liquid flowing out of the sleeve enter the gas-liquid separation tank 5, the gas is accumulated above the gas-liquid separation tank 5, the liquid is accumulated below the gas-liquid separation tank 5, and then the gas in the gas-liquid separation tank 5 is pumped out and pressurized by a natural gas compression device 1 and then introduced into the pipe network to be collected and transported to the. In this technical scheme, the gas-liquid separation jar 5 plays the effect of separation gaseous phase and liquid phase, plays the effect of storing liquid simultaneously.
The casing is a casing and an oil pipe used in gas lift drainage gas production in the prior art, the casing is sleeved outside the oil pipe, when the liquid level of accumulated liquid in a gas well is lower than the lower ends of the oil pipe and the casing, the casing and the oil pipe are in a communicated state, and when the liquid level of accumulated liquid in the gas well is higher than the lower end of the oil pipe, the casing and the oil pipe are in independent states of internal and external sealing. When the gas lift method is adopted, high-pressure gas is introduced into the casing, and liquid in the gas well is extruded out of the oil pipe, so that the purpose of water drainage and gas production is achieved.
The device further comprises a high liquid level switch 6, a low liquid level switch 7 and a hydraulic valve group 3, wherein the high liquid level switch 6 and the low liquid level switch 7 are arranged on the gas-liquid separation tank 5 and used for detecting the height of the liquid level in the gas-liquid separation tank 5; the oil inlet pipe of the hydraulic oil pump 2 is communicated with the hydraulic oil tank 4, the oil outlet pipe of the hydraulic oil pump 2 is provided with a hydraulic valve group 3, the hydraulic valve group 3 is communicated with the hydraulic oil tank 4 and is simultaneously communicated with the first hydraulic oil interface 10 and the second hydraulic oil interface 24.
In order to avoid in the gas-liquid separation jar 5 liquid to amass fully, in time defeated to the processing station with liquid collection handles, set up high liquid level switch 6 among this technical scheme, low liquid level switch 7, a liquid level height for detect in the gas-liquid separation jar 5 liquid, set up hydraulic pressure valves 3 among this technical scheme simultaneously, hydraulic pressure valves 3 and hydraulic tank 4 intercommunication are used for controlling the business turn over flow direction that hydraulic oil lets in flowing back pump 8, connect and high liquid level switch 6 with the controlling means of natural gas compression device 1 self among this technical scheme, low liquid level switch 7 and hydraulic pressure valves 3. In a normal state, the high liquid level switch 6 and the low liquid level switch 7 are in a normally open state, when the liquid level reaches the low liquid level switch 7, the low liquid level switch 7 is in a closed state, the control device controls the hydraulic valve group 3 to be not operated, the liquid discharge pump 8 is not operated, and meanwhile, hydraulic oil circulates between the hydraulic pump 2 and the hydraulic oil tank 4; when the liquid level reaches the high liquid level switch 6, the high liquid level switch 6 is in a closed state, and the control device controls the hydraulic valve group 3 to act, so that the liquid discharge pump 8 starts to work; when the liquid level is below the low liquid level switch 7 again and the low liquid level switch 7 is in an off state, the control device controls the hydraulic valve group 3 to act to enable the hydraulic valve group 3 to recover the state before liquid drainage, so that liquid drainage is stopped, and meanwhile, hydraulic oil circulates between the hydraulic pump 2 and the hydraulic oil tank 4.
Specifically, the utility model also discloses a method of utilizing supplementary flowing back device drainage gas production of natural gas engine, be in middle and later stages when the gas well exploitation, the hydrops is more, when the hydrops liquid level has flooded oil pipe, with the oil pipe intercommunication in gas-liquid separation jar 5 and the gas well, start natural gas compression device 1, utilize natural gas compression device 1 to take out the gas in gas-liquid separation jar 5 and discharge after the pressurization, form the negative pressure zone in gas-liquid separation jar 5, because the oil pipe intercommunication in gas-liquid separation jar 5 and the gas well, pressure in the oil pipe is less than the pressure in the sleeve pipe, liquid in the gas well is in being inhaled gas-liquid separation jar 5 along oil pipe under the effect of pressure differential, realize the purpose of drainage gas production. Compared with the gas lift method in the prior art, the method omits the procedure of injecting high-pressure gas into the casing and related equipment, is simple and easy to operate, has low cost, and can achieve the purpose of improving the yield of the gas well.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides an auxiliary drainage device that natural gas well was used, includes natural gas compression device (1), its characterized in that: still include hydraulic oil pump (2), hydraulic tank (4) and flowing back pump (8), the oil pipe and hydraulic tank (4) intercommunication of advancing of hydraulic oil pump (2), hydraulic oil pump (2) are through natural gas compressor arrangement (1) drive, and hydraulic oil pump (2) provide power for flowing back pump (8), flowing back pump (8) are used for with liquid suction pressure boost and flowing back.
2. The auxiliary drain device for a natural gas well according to claim 1, wherein: the liquid discharge pump (8) comprises a shell (22), a sealing element (14) and a piston rod (13), wherein the shell (22) comprises a large-diameter section and a small-diameter section, the sealing element (14) is arranged at the joint of the large-diameter section and the small-diameter section, the small-diameter section and the sealing element (14) form an oil pressure cavity (11), and the large-diameter section and the sealing element (14) form a liquid discharge cavity (16); the piston rod (13) is arranged on the sealing element (14), the two ends of the piston rod (13) are provided with a small piston (12) and a large piston (23), the small piston (12) can freely slide in the oil pressure cavity (11), and the large piston (23) can freely slide in the liquid discharge cavity (16);
still be provided with first hydraulic oil interface (10), second hydraulic oil interface (24) and inlet, leakage fluid dram on shell (22), first hydraulic oil interface (10), second hydraulic oil interface (24) set up on oil pressure chamber (11) to be located the both sides of little piston (12) respectively, inlet, leakage fluid dram set up on leakage fluid dram (16) to be located the both sides of big piston (23) respectively.
3. The auxiliary drain device for a natural gas well according to claim 2, wherein: the liquid inlet comprises a first liquid inlet (15) and a second liquid inlet (17), the liquid outlet comprises a first liquid outlet (18) and a second liquid outlet (19), the first liquid inlet (15) and the first liquid outlet (18) are located on one side of the large piston (23), and the second liquid inlet (17) and the second liquid outlet (19) are located on the other side of the large piston (23).
4. The auxiliary drain device for a natural gas well according to claim 3, wherein: still include feed liquor check valve (9) and play liquid check valve (25), feed liquor check valve (9) set up on the pipeline of first inlet (15), second inlet (17) for during restriction liquid can only one-wayly flow in flowing back liquid cavity (16), play liquid check valve (25) set up on the pipeline of first liquid outlet (18) and second liquid outlet (19), be used for restricting liquid can only one-wayly flow out flowing back liquid cavity (16).
5. The auxiliary drain device for a natural gas well according to claim 1, wherein: the gas-liquid separation device is characterized by also comprising a gas-liquid separation tank (5), wherein the gas-liquid separation tank (5) is used for separating gas and liquid produced by the gas well, storing hydraulic pressure and is communicated with the first liquid inlet (15) and the second liquid inlet (17); the natural gas compression device (1) is communicated with the gas-liquid separation tank (5) and is used for sucking and pressurizing gas in the gas-liquid separation tank (5) and then discharging the gas.
6. The auxiliary drain device for a natural gas well according to claim 1, wherein: the device is characterized by further comprising a high liquid level switch (6), a low liquid level switch (7) and a hydraulic valve group (3), wherein the high liquid level switch (6) and the low liquid level switch (7) are arranged on the gas-liquid separation tank (5) and used for detecting the height of the liquid level in the gas-liquid separation tank (5); the hydraulic valve group (3) is communicated with an oil outlet pipe of the hydraulic oil pump (2), and the hydraulic valve group (3) is also communicated with the hydraulic oil tank (4) and is simultaneously communicated with the first hydraulic oil interface (10) and the second hydraulic oil interface (24).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921340862.3U CN210290030U (en) | 2019-08-16 | 2019-08-16 | Auxiliary liquid drainage device for natural gas well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921340862.3U CN210290030U (en) | 2019-08-16 | 2019-08-16 | Auxiliary liquid drainage device for natural gas well |
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| CN210290030U true CN210290030U (en) | 2020-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360077A (en) * | 2019-08-16 | 2019-10-22 | 智马（北京）油气设备有限公司 | A kind of auxiliary pumping equipment of the natural gas well |
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2019
- 2019-08-16 CN CN201921340862.3U patent/CN210290030U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360077A (en) * | 2019-08-16 | 2019-10-22 | 智马（北京）油气设备有限公司 | A kind of auxiliary pumping equipment of the natural gas well |
| CN110360077B (en) * | 2019-08-16 | 2024-07-05 | 智马（北京）油气设备有限公司 | Auxiliary liquid draining device for natural gas well |
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