CN105927195A - Intelligent chemical adding method for natural gas well and system for realizing method - Google Patents
Intelligent chemical adding method for natural gas well and system for realizing method Download PDFInfo
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- CN105927195A CN105927195A CN201610380371.6A CN201610380371A CN105927195A CN 105927195 A CN105927195 A CN 105927195A CN 201610380371 A CN201610380371 A CN 201610380371A CN 105927195 A CN105927195 A CN 105927195A
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- pressure
- gas well
- natural gas
- control unit
- dosing
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Abstract
The invention discloses an intelligent chemical adding method for a natural gas well and a system for realizing the method. The method includes the steps that the corresponding relation between the chemical adding amount and the differential pressure variation of the oil pressure and casing pressure of the natural gas well is established through experiments, and the corresponding relation is stored in a control unit; and in the actual chemical adding process, the corresponding chemical adding amount can be worked out by collecting the pressure difference online, and intelligent injection is achieved. Through the adoption of the chemical adding method, the problems of high human resource consumption and high production management cost caused by manual operation can be solved. The adding system is of a pipeline structure, in other words, a liquid storage tank delivers chemicals to a plurality of high-pressure tanks arranged on the site of the natural gas well through the pipeline system, the chemical is added to the natural gas well through the high-pressure tank, and the problem that the installation operation of an existing installation type chemical adding device is troublesome is solved.
Description
Technical field
The present invention relates to petroleum and petrochemical industry natural gas technical field, be specifically related to a kind of natural gas well intelligent dosing side
Method and realize the system of the method.
Background technology
Along with the exploitation of oil gas field, in gas well liquid loading, produced problem manifests the most day by day.Oil gas field producing well well
Cylinder hydrops problem has badly influenced the normal production of gas well.
Along with the decline of stratum energy, produce Gas Reservoirs yield and decline therewith, natural gas take flow velocity less than facing
Boundary takes flow velocity, now relies on the energy of natural gas cannot be taken out of from pit shaft by output water, and pit shaft produces
Hydrops, with the increase of hydrops, gas well yield drastically declines, if taken no action to, gas well will be because of well
Cylinder hydrops kills payzone can not aerogenesis.In gas well recovery process, often need to measure the degree of gas well plug-ging,
And use the method to pit shaft filling foaming agent, and utilize the agitation of natural gas to produce foam in pit shaft, low close
The foam of degree can reduce the pit shaft hydrops pressure reduction to shaft bottom, relies on the relatively low natural gas flow speed can be
Pit shaft discharged in the way of foam by pit shaft hydrops, maintains the normal production of gas well, and this method is foaming water discharge
Gas producing technology.
Existing foam drainage gas recovery mainly uses people's dosing method, and artificial dosing method is to have prepared
Foaming agent mixing liquid injected from proof wellhead oil casing annular space or oil pipe by Vehicle loaded pump, pump and pharmacy jar are arranged on
On special-purpose vehicle, the power of bubble row's car is utilized to drive the operation of pump.It is mainly characterized by easy construction, investment big,
Instant effect.But owing to gas field area is big, well number is many, artificial foam drainage gas recovery is affected by vehicle condition, road conditions,
And consuming very big on human resources, production management's cost is high.Therefore, gas well intelligence is carried out in gas field even
The test of injecting device has become certainty.
Summary of the invention
It is an object of the invention to provide a kind of natural gas well intelligent dosing method, solve existing foaming water discharge
The human resources that gas producing technology uses artificial dosing to cause consumes the problem very big, production management's cost is high.
Additionally, the present invention also provides for a kind of natural gas well intelligent dosing system.
The present invention is achieved through the following technical solutions:
A kind of natural gas well intelligent dosing method, comprises the following steps:
1), the foundation of corresponding relation:
A, gather oil pressure and casing pressure by the pressure transducer of oil wells in field, calculate the pressure reduction of oil pressure and casing pressure,
The amount of the pit shaft hydrops that one pressure reduction is corresponding；
B, addition K part medicament, K is the volume of dosing；
Resurvey oil pressure and casing pressure after c, dosing, calculate the pressure reduction of oil pressure and casing pressure, so draw dosing
Pressure reduction variable quantity before and after the dosing that amount K value is corresponding；
D, circulation repeat a, b, step c, change K value, it is thus achieved that some groups of pressure reduction variable quantities and corresponding medicine
The data of agent chemical feeding quantity, are set up between pressure reduction variable quantity and corresponding chemical feeding quantity by above-mentioned some groups of data
Corresponding relation, stores in corresponding relation inputs control unit；
2), the pressure transducer Real-time Collection oil pressure of oil wells in field and casing pressure, the signal of collection is passed to control
Unit processed, calculates pressure reduction in control unit, and control unit calculates pressure according to the pressure reduction standard value set
Difference variable quantity, the corresponding relation further according to storage calculates the chemical feeding quantity that current differential pressure is corresponding；
3), signal is passed to dosing pump, and sends instruction and open meter by control unit after calculating chemical feeding quantity
Amount pump and electromagnetic valve, controlled chemical feeding quantity by dosing pump, it is achieved intelligence filling.
Existing realize natural gas well dosing method be: the volume of pit shaft hydrops in the in-site measurement natural gas well,
Volume according to the pit shaft hydrops measured uses artificial dosing method to add medicament (i.e. foaming agent), manually fills
Mode is to be noted from proof wellhead oil casing annular space or oil pipe by Vehicle loaded pump by the foaming agent mixing liquid prepared
Entering, pump and pharmacy jar are arranged on special-purpose vehicle, utilize the power of bubble row's car to drive the operation of pump；Due to gas field
Relatively decentralized, such dosing method not only waste of manpower resource, raising production cost, and directly measure well
The volume of cylinder hydrops has bigger error, the internal structure of the natural gas well, shape and the change of pit shaft hydrops
Rate all can cause measurement error.
Control unit of the present invention specifically refers to a kind of industrial computer or PLC, is arranged on the natural gas well on-the-spot
Control unit, described dosing pump is used for controlling chemical feeding quantity and dosing speed, when control unit is according to adopting online
Collecting the oil pressure and casing pressure arrived, calculate pressure reduction, pressure reduction forms pressure reduction with the standard pressure reduction of setting in control unit
Variable quantity, calculates, further according to the corresponding relation between pressure reduction variable quantity and chemical feeding quantity, the dosing that this pressure reduction is corresponding
Amount, and the signal of chemical feeding quantity is passed to dosing pump and electromagnetic valve, electromagnetic valve, dosing pump are opened, dosing pump
Chemical feeding quantity and dosing speed is given according to the signal received；Described K value is a changing value, a K value
A corresponding pressure reduction variable quantity.
Applicant is known by a large amount of on-the-spot tests: the pit shaft hydrops of the natural gas well and oil pressure, the pressure reduction of casing pressure
There is corresponding relation (the most pressure reduction of pit shaft hydrops is the biggest), the yield of natural gas is amassed with the pit shaft in the natural gas well
Liquid is relevant, and pit shaft hydrops is the most, and the aerogenesis speed of the natural gas well declines, and then causes under the yield of natural gas
Fall, the yield of natural gas sets a lower limit, an aerogenesis speed that this lower limit is corresponding, passes through effusion meter
On-line monitoring aerogenesis speed, when aerogenesis speed is less than standard speed, means that pit shaft hydrops too much needs to add
Medicine processes, and sets a pressure reduction standard value to each natural gas well according to the practical situation of the natural gas well,
When pressure reduction is higher than pressure reduction standard value, to natural gas well dosing (concentration made up a prescription is consistent), concrete dosing every time
Measure and calculated by the corresponding relation between pressure reduction variable quantity of the present invention and chemical feeding quantity.Due to oil pressure, casing pressure
Measurement can realize online data acquisition by pressure transducer, the collection of these data not only simple easily,
And the data gathered in time and are stablized, it is possible to reflect the pit shaft hydrops of the natural gas well in real time, and then by building
Vertical pressure variable quantity directly measures the well of the natural gas well compared with calculating chemical feeding quantity with the corresponding relation between chemical feeding quantity
Cylinder hydrops more accurate and effective.
The present invention is by gathering oil pressure, casing pressure at natural gas well site setup pressure transducer, by control unit
Measure the pressure reduction between oil pressure and casing pressure, after dosing, gather oil pressure, casing pressure from newly, calculate pressure reduction, repeatedly survey
Piezometric difference change two and chemical feeding quantity, finally draw the corresponding relation between chemical feeding quantity and pressure reduction variable quantity, by right
Should be related to and be stored in control unit, and in control unit, set pressure reduction standard value, pass through in the course of the work
Pressure transducer gathers oil pressure, casing pressure, control unit measure the pressure reduction between oil pressure and casing pressure, by pressure
Difference and pressure reduction standard value calculate pressure reduction variable quantity, then by the corresponding pass between chemical feeding quantity with pressure reduction variable quantity
System calculates chemical feeding quantity, and control unit, by chemical feeding quantity signal transmission dosing pump, is controlled chemical feeding quantity by dosing pump
With dosing speed, it is achieved intelligent dosing.
The present invention passes through online acquisition oil pressure and casing pressure, calculates pressure reduction, further according to pressure reduction mark in control unit
Quasi-value calculates pressure reduction variable quantity, sets up the corresponding relation between pressure reduction variable quantity and chemical feeding quantity, due to oil pressure
Collection with casing pressure is real-time and accurate, compares and directly measures pit shaft hydrops, improves the stability of data acquisition
And accuracy, and then improve the accuracy of chemical feeding quantity.
Further, control unit by the pressure reduction between the oil pressure calculated and casing pressure, pressure reduction variable quantity and
Corresponding chemical feeding quantity shows on LED display, and LED display is arranged on oil wells in field, LED display
Communicate to connect with control unit.
So that what the workmen at scene was real-time observes the condition of production of the natural gas well.
Further, control unit also communication link is connected to alarm device, and it is existing that described alarm device is arranged on oil well
?.
Described alarm device can be concretely a kind of buzzer, and when control unit, to analyze pressure signal different
Chang Shi, issues instructions to alarm device, with the workmen that warning is on-the-spot.
Natural gas well intelligent dosing system, including control system and loading system,
Described control system includes:
Signal gathering unit, described signal gathering unit is for gathering the oil pressure of gas well, casing pressure；
Control unit, described control unit is for receiving the signal that signal gathering unit gathers, according to receive
Signal is made and is analyzed the open and close judging and controlling electromagnetic valve and delivery pump；
Remote operation unit, described remote operation unit communicates to connect with control unit；
Described loading system includes fluid reservoir, and fluid reservoir is connected by pipeline N number of pressure pan, and N is more than
In 1, the port of export of pressure pan is connected with gas well oil jacket annular space, and the port of export of pressure pan arranges and leads to control unit
The electromagnetic valve that letter connects, fluid reservoir delivers medication into pressure pan by delivery pump.
Described remote operation unit specifically refers to long-range Control Room, and the collection Data Data of the different natural gas wells exists
Being analyzed in control unit judging, the signal received and analysis result are passed to by each control unit
Remote operation unit, is collected by remote operation unit, it is achieved monitor each natural gas well in real time, and
The Macro or mass analysis of data.
Each natural gas well is provided with a control unit and signal gathering unit, and signal gathering unit includes
Fuel injection pressure signal, casing pressure signal, signal is passed to remote operation unit by each control unit.
N number of pressure pan of the present invention is arranged in parallel, and loading system of the present invention uses pipeline to connect
Mode a, it is achieved that fluid reservoir, to the function of multiple pressure pan delivery of medicaments, uses pressure pan to sky simultaneously
So add medicament in gas well, it is to avoid the existing installation that chemicals dosing plant causes when installing with dismantle troublesome asking
Topic.
Further, the outlet of pressure pan is provided with dosing pump, and dosing pump communicates to connect with control unit.
Described dosing pump is capable of being precisely controlled chemical feeding quantity and dosing speed, and control unit is by chemical feeding quantity
Signal passes to dosing pump, and dosing pump controls chemical feeding quantity and dosing speed after receiving signal.
Further, signal gathering unit is the pressure transducer for gathering the oil pressure of the natural gas well, casing pressure.
Pressure transducer is prior art.
Further, also including accumulator battery, accumulator battery is connected with solar panels.
Solar panels absorption sunlight converts light energy in electric energy is stored in accumulator battery and carries out medicine system
Power, and then native system need not put into electric power facility, it is only necessary to low power solar cell for supplying power
Meet the control to equipment and work.
Further, it is provided with agitating device in fluid reservoir, pressure pan.
The setting of agitating device can improve the uniformity of medicament.
Further, loading system also includes that the cooperating equipment at skid base, pressure pan and scene is arranged on
On skid base.
Described skid base specifically refers to a kind of movable base, is set by the cooperating equipment of pressure tank and scene
Put on skid base, be easy to mobile, that raising operates convenience.
Further, it is provided with liquid level sensor in fluid reservoir, pressure pan；Level sensing in pressure pan
Device communicates to connect with control unit, and the liquid level sensor in fluid reservoir communicates to connect with remote operation unit.
Liquid level sensor is prior art.
Liquid level sensor in pressure pan is the liquid level sensing pressure pan in real time, and the liquid level letter that will collect
Number transmission control unit, by control unit make analysis judge whether open delivery pump；Liquid level in fluid reservoir
Sensor Real-time Collection is to the liquid level signal in fluid reservoir, and signal is passed to remote operation unit, by far
Journey operating unit analysis judges whether to add the medicament prepared in fluid reservoir.
The operation principle of the present invention: control unit, according to the liquid level signal of the letter pressure tank received, is analyzed and judged,
When control unit sends unlatching delivery pump instruction, power section relay adhesive, motor drives delivery pump work
Make, medicament good for proportioning in storage tank is injected in high pressure storage tank, when being filled into setting liquid level, delivery pump
Quitting work, medicament is injected in gas well oil jacket annular space by dosing pump according to the chemical feeding quantity signal received, thus
Realize the purpose of well head intellectuality medicament filling.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, the present invention is by gathering oil pressure, casing pressure at natural gas well site setup pressure transducer, single by controlling
The pressure reduction between oil pressure and casing pressure is measured by unit, gathers oil pressure, casing pressure after dosing from newly, calculates pressure reduction, repeatedly
Measure pressure reduction change two and chemical feeding quantity, finally draw the corresponding relation between chemical feeding quantity and pressure reduction variable quantity, will
Corresponding relation is stored in control unit, and sets pressure reduction standard value in control unit, leads in the course of the work
Excess pressure sensor acquisition oil pressure, casing pressure, measured the pressure reduction between oil pressure and casing pressure by control unit, pass through
Pressure reduction and pressure reduction standard value calculate pressure reduction variable quantity, then corresponding by between chemical feeding quantity with pressure reduction variable quantity
Relation calculates chemical feeding quantity, and control unit, by chemical feeding quantity signal transmission dosing pump, is controlled dosing by dosing pump
Amount and dosing speed, it is achieved intelligent dosing.
2, the present invention passes through online acquisition oil pressure and casing pressure, calculates pressure reduction, further according to pressure reduction in control unit
Standard value calculates pressure reduction variable quantity, sets up the corresponding relation between pressure reduction variable quantity and chemical feeding quantity, due to oil
The collection of pressure and casing pressure is real-time and accurate, compares and directly measures pit shaft hydrops, improves stablizing of data acquisition
Property and accuracy, and then improve the accuracy of chemical feeding quantity.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes the application's
A part, is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of intelligent dosing system.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and attached
Figure, the present invention is described in further detail, and exemplary embodiment and the explanation thereof of the present invention are only used for
Explain the present invention, not as a limitation of the invention.
Embodiment 1:
As it is shown in figure 1, a kind of natural gas well intelligent dosing method, comprise the following steps:
1), the foundation of corresponding relation:
A, gather oil pressure and casing pressure by the pressure transducer of oil wells in field, calculate the pressure reduction of oil pressure and casing pressure,
The amount of the pit shaft hydrops that one pressure reduction is corresponding；
B, addition K part medicament, K is the volume of dosing；
Resurvey oil pressure and casing pressure after c, dosing, calculate the pressure reduction of oil pressure and casing pressure, so draw dosing
Pressure reduction variable quantity before and after the dosing that amount K value is corresponding；
D, circulation repeat a, b, step c, change K value, it is thus achieved that some groups of pressure reduction variable quantities and corresponding medicine
The data of agent chemical feeding quantity, are set up between pressure reduction variable quantity and corresponding chemical feeding quantity by above-mentioned some groups of data
Corresponding relation, stores in corresponding relation inputs control unit；
2), the pressure transducer Real-time Collection oil pressure of oil wells in field and casing pressure, the signal of collection is passed to control
Unit processed, calculates pressure reduction in control unit, and control unit calculates pressure according to the pressure reduction standard value set
Difference variable quantity, the corresponding relation further according to storage calculates the chemical feeding quantity that current differential pressure is corresponding；
3), signal is passed to dosing pump, and sends instruction and open meter by control unit after calculating chemical feeding quantity
Amount pump and electromagnetic valve, controlled chemical feeding quantity by dosing pump, it is achieved intelligence filling.
Embodiment 2:
The present embodiment based on embodiment 1, control unit by the pressure reduction between the oil pressure calculated and casing pressure, and
The chemical feeding quantity that pressure reduction is corresponding shows on LED display, and LED display is arranged on oil wells in field, and LED shows
Display screen communicates to connect with control unit；Described control unit also communication link is connected to alarm device, and described warning fills
Put and be arranged on oil wells in field.
Embodiment 3:
Natural gas well intelligent dosing system, including control system and loading system,
Described control system includes:
Signal gathering unit, described signal gathering unit is for gathering the oil pressure of gas well, casing pressure；
Described signal gathering unit is the pressure transducer for gathering natural gas well oil pressure, casing pressure；
Control unit, described control unit is for receiving the signal that signal gathering unit gathers, according to receive
Signal is made and is analyzed the open and close judging and controlling electromagnetic valve and delivery pump；
Remote operation unit, described remote operation unit communicates to connect with control unit；
Described loading system includes fluid reservoir, and fluid reservoir is connected by pipeline N number of pressure pan, and N is equal to 2,
Can also be 3,4 or 5, the port of export of pressure pan be connected with gas well oil jacket annular space, and the port of export of pressure pan sets
Putting and the electromagnetic valve of control unit communication connection, fluid reservoir delivers medication into pressure pan by delivery pump.
Embodiment 4:
The present embodiment is based on embodiment 3, and the outlet of described pressure pan is provided with dosing pump, and dosing pump is single with control
Unit's communication connection；Also including accumulator battery, accumulator battery is connected with solar panels；Described fluid reservoir, high pressure
Agitating device it is provided with in tank；Described loading system also includes joining of skid base, pressure pan and scene
Conjunction equipment is arranged on skid base；It is provided with liquid level sensor in described fluid reservoir, pressure pan；High pressure
Liquid level sensor in tank and control unit communicate to connect, the liquid level sensor in fluid reservoir with remotely operate list
Unit's communication connection.
Above-described detailed description of the invention, is carried out the purpose of the present invention, technical scheme and beneficial effect
Further describe, be it should be understood that the detailed description of the invention that the foregoing is only the present invention,
The protection domain being not intended to limit the present invention, all within the spirit and principles in the present invention, that is done is any
Amendment, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a natural gas well intelligent dosing method, it is characterised in that comprise the following steps:
1), the foundation of corresponding relation:
A, gather oil pressure and casing pressure by the pressure transducer of oil wells in field, calculate the pressure reduction of oil pressure and casing pressure,
The amount of the pit shaft hydrops that one pressure reduction is corresponding；
B, addition K part medicament, K is the volume of dosing；
Resurvey oil pressure and casing pressure after c, dosing, calculate the pressure reduction of oil pressure and casing pressure, so draw dosing
Pressure reduction variable quantity before and after the dosing that amount K value is corresponding；
D, circulation repeat a, b, step c, change K value, it is thus achieved that some groups of pressure reduction variable quantities and corresponding medicine
The data of agent chemical feeding quantity, are set up between pressure reduction variable quantity and corresponding chemical feeding quantity by above-mentioned some groups of data
Corresponding relation, stores in corresponding relation inputs control unit；
2), the pressure transducer Real-time Collection oil pressure of oil wells in field and casing pressure, the signal of collection is passed to control
Unit processed, calculates pressure reduction in control unit, and control unit calculates pressure according to the pressure reduction standard value set
Difference variable quantity, the corresponding relation further according to storage calculates the chemical feeding quantity that current differential pressure is corresponding；
3), signal is passed to dosing pump, and sends instruction and open meter by control unit after calculating chemical feeding quantity
Amount pump and electromagnetic valve, controlled chemical feeding quantity by dosing pump, it is achieved intelligence filling.
A kind of natural gas well intelligence charging method the most according to claim 1, it is characterised in that control
Pressure reduction between the oil pressure calculated and casing pressure, the chemical feeding quantity of pressure reduction variable quantity and correspondence are shown by unit
On LED display, LED display is arranged on oil wells in field, and LED display communicates to connect with control unit.
A kind of natural gas well intelligence charging method the most according to claim 1, it is characterised in that described
Control unit also communication link is connected to alarm device, and described alarm device is arranged on oil wells in field.
4. realizing the natural gas well intelligent dosing system of method described in any one of claim 1-3, its feature exists
In, including control system and loading system,
Described control system includes:
Signal gathering unit, described signal gathering unit is for gathering the oil pressure of gas well, casing pressure；
Control unit, described control unit is for receiving the signal that signal gathering unit gathers, according to receive
Signal is made and is analyzed the open and close judging and controlling electromagnetic valve and delivery pump；
Remote operation unit, described remote operation unit communicates to connect with control unit；
Described loading system includes fluid reservoir, and fluid reservoir is connected by pipeline N number of pressure pan, and N is more than
In 1, the port of export of pressure pan is connected with gas well oil jacket annular space, and the port of export of pressure pan arranges and leads to control unit
The electromagnetic valve that letter connects, fluid reservoir delivers medication into pressure pan by delivery pump.
Natural gas well intelligent dosing system the most according to claim 4, it is characterised in that described high pressure
The outlet of tank is provided with dosing pump, and dosing pump communicates to connect with control unit.
Natural gas well intelligent dosing system the most according to claim 4, it is characterised in that described signal
Collecting unit is the pressure transducer for gathering natural gas well oil pressure, casing pressure.
Natural gas well intelligent dosing system the most according to claim 4, it is characterised in that also include storing
Set of cells, accumulator battery is connected with solar panels.
Natural gas well intelligent dosing system the most according to claim 4, it is characterised in that described liquid storage
It is provided with agitating device in tank, pressure pan.
Natural gas well intelligent dosing system the most according to claim 4, it is characterised in that described filling
System also includes that the cooperating equipment at skid base, pressure pan and scene is arranged on skid base.
Natural gas well intelligent dosing system the most according to claim 4, it is characterised in that described storage
It is provided with liquid level sensor in flow container, pressure pan；Liquid level sensor in pressure pan and control unit communication
Connecting, the liquid level sensor in fluid reservoir communicates to connect with remote operation unit.
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| CN112127860A (en) * | 2019-06-25 | 2020-12-25 | 中国石油化工股份有限公司 | Novel play automatic joining of defoaming integration device |
| CN112943170A (en) * | 2021-03-03 | 2021-06-11 | 盘锦华晨石油装备制造有限公司 | Pressurization and yield increase associated circulating gas lift system for low-pressure gas well |
| CN113323642A (en) * | 2020-02-28 | 2021-08-31 | 中国石油化工股份有限公司 | Gas well liquid on-line diagnosis and foam liquid drainage gas production intelligent agent injection method |
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| CN107806334A (en) * | 2017-12-08 | 2018-03-16 | 中山乐满石油设备有限公司 | Intelligent gas production system is opened between a kind of antifreeze regulation cut-off combination valve of full Wireless integrated electric |
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| CN112943170A (en) * | 2021-03-03 | 2021-06-11 | 盘锦华晨石油装备制造有限公司 | Pressurization and yield increase associated circulating gas lift system for low-pressure gas well |
| CN112943170B (en) * | 2021-03-03 | 2022-08-09 | 盘锦华晨石油装备制造有限公司 | Pressurization and yield increase associated circulating gas lift system for low-pressure gas well |
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