CN109723408A - A kind of Split type intelligent plunger with pulley mechanism - Google Patents
A kind of Split type intelligent plunger with pulley mechanism Download PDFInfo
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- CN109723408A CN109723408A CN201910226506.7A CN201910226506A CN109723408A CN 109723408 A CN109723408 A CN 109723408A CN 201910226506 A CN201910226506 A CN 201910226506A CN 109723408 A CN109723408 A CN 109723408A
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Abstract
The present invention relates to gas well water pumping gas production field more particularly to a kind of Split type intelligent plungers with pulley mechanism.It is characterized by: Intelligent Plunger includes adaptive valve mechanism built in the pulley mechanism of plunger body and its lower end, the opening butterfly valve of plunger guide bush and spring slips and locking device built in it, upper lower bumper and lower bumper and the pressure, temperature, velocity sensor and the microprocessor that are attached on plunger body and plunger guide bush, by controlling the movement of pulley mechanism, the speed of plunger body and plunger guide bush during upstream or downstream is controlled.The uncontrollable defect of velocity of plunger solved in current responding curve of well continuous production operation for draining is had the advantage that compared with prior art, and then plunger body and plunger guide bush are efficiently avoided during upstream or downstream, serious the problem of colliding, causing underground or well head accident occurs.
Description
Technical field
The present invention relates to gas field water pumping gas production field, in particular to a kind of Split type intelligent plunger with pulley mechanism.
Background technique
Shown according to national energy office data, the disposable energy consumption specific gravity in China: natural gas accounting in 2003 up to 2.7%,
Rise to 5.3% within 2010, it is contemplated that rise to 9.8% to the year two thousand twenty.It is possible thereby to illustrate, environmental protection is constantly being emphasized,
Pollution is reduced, blue mountains and green waters is exactly under total keynote of Kingsoft Yin Shan, and China's energy resource structure is tilted constantly to more clean energy resource,
Still also ascendant trend is being presented in the natural gas demand of state.But it is depended on from sea for nearly three one-tenth in the current Natural Gas Consumption Using in China
Outer import, so, increase China's natural gas total output to be very necessary the needs of meeting national economy and industrial development, and
Under the more and more difficult situation of the new high-quality gas field of large size of current discovery, this is just sought after further investigation natural gas volume increase
Technology, the gas production of Lai Tigao individual well, to increase China's natural gas total output.And at present in the exploitation of China's natural gas well,
Restricting individual well to continue the greatest problem of gas production is exactly hydrops in pit shaft.The appearance of hydrops the reason is that during gas reservoir exploitation,
The water and condensate of produced gas and gas association are mainly transmitted in the form of mist flow and drop in gas well, when by for a long time
After exploitation, since strata pressure gradually declines, the flow velocity of gas also inevitably reduces in pit shaft, when it takes liquid less than critical
After rate, it will result in and generate annular flow in pit shaft, and then form slug flow, will cause the sedimentation of entrained liquid with this, and
It concentrates in pit shaft, to pit shaft inner product liquid layer occur, allows the output gas in stratum by fluid-tight, can not normally rise along pit shaft
Output causes the gas production of individual well to decline to a great extent, or even gas well can be forced to stop production when product hypervolia.And in the presence of gas well plug-ging
Between it is too long, also will increase pit shaft and include liquid saturation degree so that gas phase permeability reduce, lead to gas output per well and recovery ratio all
It is greatly reduced.Therefore want that improving well yield is discharged hydrops using suitable gas production water discharge technology, solves the problems, such as shaft bottom hydrops
It is very important.Gas production draining common method have gaslift drainage, optimizing pipe string method, foaming water discharge method, machine pump drainage water law,
Electric submersible pump draining and jet stream pump drainage.These methods are suitable for the draining of the shaft bottom under different hydrops amounts, and according to National Energy Board
Data show that China's major part gas well is in the hydrops stage at initial stage at present, and hydrops amount is usually no more than 50m3/ d, and wherein gas
It lifts drainage and is just primarily adapted for use in the draining of the shaft bottom under this hydrops amount, generate asking for hydrops for solving initial stage in pit shaft
Topic.A kind of Split type intelligent plunger with pulley mechanism of the present invention just belongs to one of gaslift drainage.
The principle of gaslift drainage can be summarized as: after closing a well in, under the effect of gravity, the plunger for draining be allowed to decline
To shaft bottom, then opening well and making production, plunger drain is pushed using the lifting force of gas in pit shaft, repeats this two step, energy always
Realize gas production draining.Currently used plunger have entity steel plunger, bullet block formula plunger, liner type plunger, paraffin-scraping type plunger and
Brush plunger etc..Meanwhile being drained using plunger is also a kind of intermittent gaslift form, essence is by end-of-life stage expanding production
The method of pressure difference, moves back and forth up and down in the wellbore underground hydrops is discharged, such as patent US7121335B2 and CN104389782,
The advantages of this kind of form, is: (1) making full use of well self-energy, be not necessarily to other energy consumptions；(2) gas-liquid is divided as solid interface
It opens, considerably reduces liquid falling；(3) borehole wall wax deposition problem can effectively be mitigated.But the mode of this discontinuous operation,
It in practical operation, needs to be equipped with a large amount of corollary equipment, and need staff on duty in production process, will cause initial stage investment in
Phase operation cost is excessively high, and greatest drawback is the continuous increase with well depth, the required closed-in time for reducing well cylinder pressure
Also it can increasingly grow, if general well depth reaches 3000m closing well at least 180 minutes or more, the serious gas production for affecting individual well
Efficiency and yield.If in addition, want that its production method is allowed to become working continuously, i.e. responding curve of well during plunger is in downlink, then
It will receive the gaslift power effect climbed sharply upwards in real time in gas well, and cause plunger that can not reach shaft bottom, therefore in order to solve this hardly possible
Topic, develops bypass type plunger or split type plunger at present to be resolved.
Bypass type plunger is equipped with bypass mechanism in plunger, when plunger outreaches position shock fastener, mechanism
In by-passing valve open, allow ascending air to pass through from channel, so as to allow plunger under the effect of gravity, similar freely falling body
Movement；When plunger drops to bottom position cushion at collision, the by-passing valve in mechanism is closed, and does not allow ascending air from channel
It passes through, to obtain lifting force, lifts hydrops uplink.But when due to conventional formula plunger, even liner type plunger moves in well,
It inevitably collides with tubing wall and impulsive contact force that when free-falling is excessive can all make by-passing valve easily damage or fail,
It is uncontrollable and form impact force or impact force is excessive to be particularly due to speed, the valve in turn resulted in is opened accidentally or is closed, all
Will cause in actual production plunger can not under to shaft bottom, be stuck in well or appearance the problem of without band liquid uplink.
The New type detachable plunger of patent US10006274B2, CN202832414 U and CN204238911 U invention,
Principle can be summarized as: allow plunger body and plunger guide bush successively to fall during downlink, since diameter of plunger is less than mineshaft diameter,
Gas passes through in the gap between plunger and pit shaft i.e. in well, causes the environment of no pressure difference, and such plunger downlink is equal to freely
Falling, then, every discharging plunger guide bush again for a period of time, due to the presence of center hole in sleeve, gas in well
It can be passed through from its center, cause the environment of no pressure difference, such plunger guide bush downlink is also equal to the movement of falling object, when it reaches well
Behind bottom in conjunction with plunger, the sealing of two mechanisms is carried out under the effect of gravity.But its major defect is: (1) meeting in practical operation
There is being continuously increased due to well depth, during downlink, because plunger is constantly in proximate freedom falling, speed exists always
Increase, therefore when plunger reaches shaft bottom, it necessarily will cause the excessive collision to shaft bottom buffer, so that plunger or buffer are damaged,
Bottom equipment even is smashed, causes serious down-hole accident.It (2) is equally to do freely to fall when then plunger guide bush reaches shaft bottom
Body movement, speed are also to increase always, therefore necessarily will also result in the stuck of plunger guide bush and plunger, and complete equipment is made to fail.
(3) during uplink, plunger and plunger guide bush entirety uplink are in ever-increasing lifting according to kinetic model always
Carry out uplink under the active force of the difference of power and frictional force, also accelerate, thus reach the top position when also due to speed
It is excessive that collision will cause to limiter, it damages plunger or limiter, security risk is very big.
It will cause great down-hole accident, invention one to solve the problems, such as in the draining of practical gas well that velocity of plunger is uncontrollable
Kind can rate controlling Intelligent Plunger to gas extraction have great and real meaning.
Summary of the invention
Object of the present invention is to solve the problems, such as that plunger movement velocity is uncontrollable in the draining of practical gas well, proposes a kind of band
The Split type intelligent plunger of pulley, realizes plunger during uplink and downlink, can real-time control speed, make reaching for its safety and steady
To shaft bottom or well head, avoids causing the damage of shaft bottom or wellhead equipment due to excessive impact force, reduce down-hole accident
Risk.
In order to achieve the above object, the specific technical solution that the present invention uses is as follows:
Split type intelligent plunger with pulley is launched in well, later, it is driven to reach the position of limiter, due to limit
The effect of device upper ejector pin, separates plunger body with plunger guide bush, and plunger body is allowed to decline in advance, and plunger guide bush is locked valve
It is locked in apical position, then, after speed reaches optimized range of speeds to plunger body during decline, is made by signal control
Pulley mechanism opens, and causes certain frictional force, and continues increasing friction force until plunger body slows down, when plunger body is down to most preferably
After velocity interval, the frictional force that adjustable pulley generates, through adjusting after a period of time, makes plunger institute under the detection of sensor
Gravity, air drag and the frictional force received are in equilibrium state, and then allow plunger body uniform descending, after then reaching by calculating
Time point start increasing friction force and break equilibrium state, make plunger body continue to slow down, and pass through signal and control plunger guide bush lock
After determining valve deblocking, starts to discharge the plunger guide bush also in topmost position, when plunger body moves to lowermost end, pack up pulley
Mechanism after plunger guide bush freely falling body reaches optimized range of speeds, passes through signal control sleeve then using after a certain period of time
The closure of upper butterfly valve makes to generate pressure difference below sleeve, and then form lifting force so that gas be hindered to pass through sleeve, make sleeve into
Row slows down, until decelerating in zone of reasonableness, is then gradually opened butterfly valve by signal, the lifting force for being subject to it gradually subtracts
It is small, but still by certain air drag, plunger guide bush is in acceleration-deceleration alternating phases at this time, but speed is in always
It in a certain range, and gradually slows down to lowermost end always, and after arrival, fully opens butterfly valve by signal control,
Under the effect of gravity with plunger body by spring controling mechanism in conjunction with seal, and due to being circular conical surface sealing, sealing performance is fabulous
And it is not easy stuck；Uplink process, in cylinder under the action of gas lifting force, plunger is transported upwards together as a whole with plunger guide bush
Dynamic, since overall isolation gas-liquid forms sealing, i.e., whole lower section pressure difference is increasing, suffered by the entirety of plunger and plunger guide bush
Lifting force is increasing, at this time generally in the acceleration uplink stage, and during speed increase, the whole frictional force with tube wall
It is increasing, but pass through kinetic model, it is known that the rate that lifting force rises is greater than the rising of frictional force, therefore entirety still can add
Fast uplink controls release pulley mechanism by signal, is gradually increased what it was integrally subject to after speed reaches optimized range of speeds
Frictional force allows whole stress to be just in equilibrium state, makees at the uniform velocity under the detection of sensor by the adjustment of a period of time
Upstroke is stablized in optimized range of speeds, then, in the calculating position close to well head, is controlled by signal and increases pulley
Frictional force, break equilibrium state, make it is whole slow down, until going upward to discharge outlet, pack up pulley, then, go upward to most
At the limiter of top.Later, if checking the interior also hydrops of pit shaft by sensor, then entirety is made by signal control valve body
Continue to rise, under the action of mandril, separates plunger body with plunger guide bush and start second of circulation, reciprocal above-mentioned mistake
Journey, i.e., hydrops in sustainable discharge pit shaft, and gas well yield is not influenced in drainage procedure.In entire drainage procedure, if
Needing to adjust discharge tolerance can be adjusted by adaptive valve.
The pulley mechanism is connected by screw to be fastened with plunger body, it is characterised in that when split type plunger is in plunger
During body independent descending and whole uplink, it can be fed back according to signal and discharge pulley mechanism in time, to be carried out to plunger
Effectively rate controlling, and then avoid the excessive situation of speed and occur.
The plunger body and plunger guide bush can be separated or be combined, it is characterised in that they will not influence gas well when moving
Gas is produced, i.e., entire drainage procedure does not all need closing well.
The spring mechanism is built in plunger guide bush, and has card slot, it is characterised in that plunger body and plunger guide bush into
When row separation or combination, resiliency and leakproofness are provided, is effectively prevented from and stuck phenomenon occurs.
The butterfly valve mechanism is located at the top center of plunger guide bush, and opening and closing degree can be adjusted according to signal intensity,
It is characterized in that the opening and closing degree that butterfly valve is adjusted carries out rate controlling to sleeve, to avoid speed during plunger guide bush downlink
The problem of spending and form excessive impulsive contact force greatly, damaging plunger guide bush.And after butterfly valve fully opens, plunger guide bush can be made approximate
The movement of falling object.The adaptive valve is located in the buffer of lowermost end, it is characterised in that if you need to adjust discharge tolerance
Size can be adjusted by adaptive valve.
The conical seal surface is between plunger body and the contact surface of plunger guide bush, it is characterised in that can be preferably to column
Cock body is sealed with plunger guide bush, good seal performance and is less prone to stuck phenomenon.
The lock-up valve is located in plunger guide bush, it is characterised in that can lock, allow to plunger guide bush after isolation
It does not slide voluntarily under the effect of gravity.
Compared with prior art, the present invention having had the advantage that:
(1) in drainage procedure can real-time control plunger motion speed, when its downward movement, releasable pulley mechanism into
Row slows down, and is effectively prevented from when reaching the limit of position, cause excessive shock power, and plunger is prevented to be damaged, and improves plunger
Service life.
(2) in drainage procedure can real-time control plunger motion speed can be adaptive by adjusting when its upstroke
The opening and closing degree of valve efficiently controls the rising tolerance in pit shaft, to adjust the lifting force in pit shaft, and discharges when necessary
Pulley increase frictional force, and then control plunger speed uplink, reach optimal velocity, first is that effectively shorten plunger uplink when
Between, improve drainage efficiency；Second is that being effectively prevented from when reaching the limit of position, cause excessive shock power, prevents plunger from being damaged
It is bad, improve the service life of plunger.
(3) underground hydrops can be discharged real-time, quickly, and do not have to not influence gas well liquid loading when closing well, i.e. draining.
(4) by the input and output of microprocessor control signals, to accurately control butterfly valve, adaptive valve and latching valve
Opening and closing, increases control efficiency, improves whole operational efficiency, that is, significantly enhances the stability and draining effect of system
Rate.
(5) plunger body and plunger guide bush are sealed using circular conical surface, and sealing performance is fabulous and is less prone to stuck phenomenon.
Detailed description of the invention
Fig. 1 plunger body in conjunction with plunger guide bush after whole uplink sectional view；
The sectional view of move alone when Fig. 2 plunger body and plunger guide bush difference downlink
Fig. 3 plunger body in conjunction with plunger guide bush after the sectional view that integrally reaches
The sectional view that Fig. 4 separates plunger body with plunger guide bush in apical position mandril
Sectional view when optimum speed is reached when Fig. 5 plunger body downlink
The sectional view of pulley is discharged when Fig. 6 plunger body downlink
Fig. 7 plunger body goes downwards to the sectional view of release plunger guide bush after certain position
Fig. 8 plunger body goes downwards to the sectional view of lowermost end
The sectional view of Fig. 9 plunger guide bush arrival lowermost end
The sectional view that Figure 10 plunger body seals in conjunction with plunger guide bush
The sectional view of Figure 11 plunger body and the whole uplink under the effect of gas lifting force of plunger guide bush
Figure 12 plunger body and the whole sectional view that pulley is discharged after uplink reaches optimum speed of plunger guide bush
Figure 13 plunger body and the whole sectional view that pulley is tightened when uplink is reached close to mandril position of plunger guide bush
There are still hydrops, then plunger body and plunger guide bush integrally reach the section of topmost position in Figure 14 detection pit shaft
Figure
In figure: 1, lower buffer spring, 2, the lower buffing pad containing adaptive valve mechanism, 3, pulley mechanism, 4, plunger body, 5,
Plunger body sealing surface, 6, plunger mandril, 7, plunger guide bush, 8, sleeve seal face, 9, spring slips, 10, locking device opens
Mouth butterfly valve, 11, overflow port, 12, upper buffer spring, 13, limit thimble, 14, limit spring
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now in conjunction with this hair of Detailed description of the invention
Bright specific embodiment.
Embodiment 1: as shown in figure 3, at top, plunger body (4) and plunger guide bush (7) put into gas well as a whole
In.
Embodiment 2: on the basis of embodiment 1, as shown in figure 4, plunger body (4) is under the action of the limiter mandril of top
It is separated with plunger guide bush (7), is then fallen in advance.
Embodiment 3: on the basis of embodiment 2, as shown in figure 5, plunger body (4) does the movement of falling object in pit shaft,
Until reaching through the calculated optimized range of speeds of kinetic model early period.
Embodiment 4: on the basis of embodiment 3, as shown in fig. 6, plunger body (4) is released after reaching in optimized range of speeds
It puts pulley mechanism (3), increase frictional force makes it reach mechanical balance after the adjustment of a period of time under the detection of sensor,
Make uniform motion.
Embodiment 5: on the basis of embodiment 4, as shown in fig. 7, plunger body (4) uniform motion for a period of time after, lead to
The butterfly valve unlock (10) of the locking of signal control plunger guide bush is crossed, and then discharges plunger guide bush (7).
Embodiment 6: on the basis of embodiment 5, as shown in figure 8, packing up pulley after plunger body (4) goes downwards to lowermost end
Mechanism (3), and plunger guide bush (7) continues to decline after reaching in optimized range of speeds, passes through butterfly valve (10) in signal control sleeve
Closure make to generate pressure difference below plunger guide bush (7), and then form lifting force so that gas be hindered to pass through plunger guide bush (7),
So that plunger guide bush (7) is slowed down, until decelerating in zone of reasonableness, butterfly valve (10) is then gradually opened by signal, make column
The lifting force that plug sleeve (7) is subject to is gradually reduced, and is in acceleration-deceleration alternating phases, but speed is in a certain range always.
Embodiment 7: on the basis of embodiment 6, as shown in figure 9, passing through signal when plunger guide bush (7) is close to lowermost end
Control fully opens butterfly valve (10).
Embodiment 8: on the basis of embodiment 7, as shown in Figure 10, under the effect of gravity, plunger guide bush (7) is in lowermost end
It is combined with plunger body (4), forms an entirety under the sealing of spring slips (9).
Embodiment 9: on the basis of embodiment 8, as shown in figure 11, plunger body (4) and plunger guide bush (7) exist as a whole
The lifting force that lower section air pressure is formed in cylinder acts on lower uplink.
Embodiment 10: on the basis of embodiment 9, as shown in figure 12, plunger body (4) and plunger guide bush (7) are as a whole
After uplink reaches optimum speed, release pulley mechanism (3) is controlled by signal, is gradually increased plunger body (4) and plunger guide bush
(7) frictional force being subject to as a whole allows whole stress just to locate under the detection of sensor by the adjustment of a period of time
In equilibrium state, make uniform ascending movement, and stablizes in optimized range of speeds.
Embodiment 11: on the basis of embodiment 10, as shown in figure 13, plunger body (4) and plunger guide bush (7) are as a whole
Pulley mechanism (3) are tightened when uplink is reached close to mandril position.
Embodiment 12: on the basis of embodiment 11, as shown in figure 14, plunger body (4) and plunger guide bush (7) are as a whole
Limiter position is reached, later, there are also hydrops if checking in pit shaft, then make on whole continue by signal control valve body
It rises, under the action of mandril, plunger body (4) is made to carry out separating and starting second of circulation with plunger guide bush (7).
A kind of Split type intelligent plunger with pulley provided by the invention both can real-time control column in drainage procedure
Movement velocity is filled in, when its downward movement, releasable pulley mechanism slows down, and is effectively prevented from when reaching the limit of position, makes
At excessive impact force, plunger is prevented to be damaged, improves the service life of plunger.It can lead to again when its upstroke
The opening and closing degree for overregulating adaptive valve efficiently controls the rising tolerance in pit shaft, so that the lifting force in pit shaft is adjusted,
Release pulley increases frictional force when necessary, and then controls the speed uplink of plunger, reaches optimal velocity, first is that effectively contracting
Short-plunger upstream time improves drainage efficiency；Second is that being effectively prevented from when reaching the limit of position, cause excessive shock power, prevents
Only plunger is damaged, and improves the service life of plunger.Underground hydrops can also be discharged real-time, quickly, and do not have to closing well,
I.e. draining when do not influence gas well liquid loading.And the input and output of signal are controlled as maincenter by microprocessor, in turn
The opening and closing for accurately controlling butterfly valve, adaptive valve and latching valve, increases control efficiency, improves whole operational efficiency, i.e.,
Significantly enhance the stability and drainage efficiency of system.There are also plunger bodies and plunger guide bush to be sealed using circular conical surface, leakproofness
Energy is fabulous and is less prone to stuck phenomenon.
Exemplified as above is only the schematical specific embodiment of the present invention, the range being not intended to limit the invention.It is any
Those skilled in the art, made equivalent changes and modifications under the premise of not departing from design and the principle of the present invention,
It should belong to protection scope of the present invention.
Claims (9)
1. a kind of Split type intelligent plunger with pulley mechanism, lower slow including lower buffer spring (1), containing adaptive valve mechanism
Red seat (2), plunger body (4), plunger body sealing surface (5), plunger mandril (6), plunger bushing (7) sleeve seal face (8), spring slips
(9), the opening butterfly valve (10) of locking device, overflow port (11), upper buffer spring (12), limit thimble (13), limit spring
(14), it is characterised in that: the Split type intelligent plunger with pulley mechanism further includes pulley mechanism (3).
2. a kind of Split type intelligent plunger with pulley mechanism according to claim 1, it is characterised in that: the turbine
Structure (3) is connected by screw to be fastened with plunger body (4).
3. a kind of Split type intelligent plunger with pulley mechanism according to claim 1, it is characterised in that: the turbine
Structure (3) can be opened according to signal or is closed and interior contain signal receiver.
4. a kind of Split type intelligent plunger with pulley mechanism according to claim 1, it is characterised in that: the plunger body
4) it can be realized with plunger guide bush (7) and separate and combine.
5. a kind of Split type intelligent plunger with pulley mechanism according to claim 1, it is characterised in that: the Spring Card
Watt (9) are built in plunger guide bush (7) and with card slot.
6. a kind of Split type intelligent plunger with pulley mechanism according to claim 1, it is characterised in that: the butterfly valve machine
Structure (10) is located at the top center of plunger guide bush (7), and opening and closing degree can be adjusted in butterfly valve mechanism (10) according to signal intensity.
7. a kind of Split type intelligent plunger with pulley mechanism according to claim 1, it is characterised in that: described adaptive
Valve mechanism (2) is located in the lower buffing pad of bottom end, and velocity sensor built in adaptive valve mechanism (2).
8. a kind of Split type intelligent plunger with pulley mechanism according to claim 1, it is characterised in that: the sealing surface
(5) (8) are located between plunger body (4) and the contact surface of plunger guide bush (7), and use conical seal surface.
9. a kind of Split type intelligent plunger with pulley mechanism according to claim 1, it is characterised in that: the plunger bushing
Opening butterfly valve (10) containing locking device in cylinder (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910226506.7A CN109723408B (en) | 2019-03-25 | 2019-03-25 | Split type intelligent plunger with pulley mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910226506.7A CN109723408B (en) | 2019-03-25 | 2019-03-25 | Split type intelligent plunger with pulley mechanism |
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| CN110821817A (en) * | 2019-11-20 | 2020-02-21 | 哈尔滨艾拓普科技有限公司 | Drainage gas production intelligence plunger |
| CN110952525A (en) * | 2019-12-04 | 2020-04-03 | 浙江大学 | Segmented plug flow type drain pipe, drainage device and drainage method |
| CN113719259A (en) * | 2021-06-25 | 2021-11-30 | 西安石油大学 | Gas lift intelligence helping hand plunger |
| CN113757101A (en) * | 2021-11-08 | 2021-12-07 | 西南石油大学 | Integral type components of a whole that can function independently plunger of adjustable falling speed |
| CN114645696A (en) * | 2022-03-14 | 2022-06-21 | 宝鸡文理学院 | Hybrid power gas lift plunger |
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|---|---|---|---|---|
| CN110821817A (en) * | 2019-11-20 | 2020-02-21 | 哈尔滨艾拓普科技有限公司 | Drainage gas production intelligence plunger |
| CN110952525A (en) * | 2019-12-04 | 2020-04-03 | 浙江大学 | Segmented plug flow type drain pipe, drainage device and drainage method |
| CN113719259A (en) * | 2021-06-25 | 2021-11-30 | 西安石油大学 | Gas lift intelligence helping hand plunger |
| CN113719259B (en) * | 2021-06-25 | 2022-07-22 | 西安石油大学 | Gas lift intelligence helping hand plunger |
| CN113757101A (en) * | 2021-11-08 | 2021-12-07 | 西南石油大学 | Integral type components of a whole that can function independently plunger of adjustable falling speed |
| CN113757101B (en) * | 2021-11-08 | 2022-01-11 | 西南石油大学 | Integral type components of a whole that can function independently plunger of adjustable falling speed |
| CN114645696A (en) * | 2022-03-14 | 2022-06-21 | 宝鸡文理学院 | Hybrid power gas lift plunger |
| CN114645696B (en) * | 2022-03-14 | 2024-01-30 | 宝鸡文理学院 | Hybrid gas lift plunger |
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|---|---|
| CN109723408B (en) | 2021-06-15 |
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