CN108361006A - A kind of water drainage-gas recovery technology method using preset pneumatic type tubing string - Google Patents
A kind of water drainage-gas recovery technology method using preset pneumatic type tubing string Download PDFInfo
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- CN108361006A CN108361006A CN201810194453.0A CN201810194453A CN108361006A CN 108361006 A CN108361006 A CN 108361006A CN 201810194453 A CN201810194453 A CN 201810194453A CN 108361006 A CN108361006 A CN 108361006A
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- gas
- preset
- shaft bottom
- piston
- pneumatic
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Classifications
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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
-
- 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
-
- 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
Abstract
The present invention provides a kind of water drainage-gas recovery technology method using preset pneumatic type tubing string, belong to natural gas extraction technical field, by the way that preset pneumatic type tubing string is arranged in gas-producing well, and realize that the insertion of preset pneumatic type tubing string seals using the interference fit for being inserted into seal modules and between the preset sealing drum of internal surface of sleeve pipe, and according to the relationship between the shaft bottom hydrops height and preset height threshold value of gas-producing well, automatically switch the gas production function and water pumping gas production function of preset pneumatic type tubing string, handover operation between function is to be automatically brought into operation, handover operation is simple and function switch is timely, i.e. the water drainage-gas recovery technology method is not only easy to operate, and adaptability is extensive and process costs are low, and there is lower energy consumption, pollution of the water pumping gas production in the process to stratum can also be reduced simultaneously.
Description
Technical field
The present invention relates to natural gas extraction technical field more particularly to a kind of water drainage-gas recovery technologies using preset pneumatic type tubing string
Method.
Background technology
With the fast development of global economy, the demand of resource increasingly increases, and the oil for being known as one of three big energy is natural
Gas resource is even more demand anxiety, and the mode for seeking cost-effective exploitation oil-gas resource has become current oil field development
Theme.
After gas well is gone into operation, gas production, the pressure of Qi Jing decline comparatively fast, and then cause gas well fluid-carrying capability insufficient, with
The hydrops gas well quantity of the extension of production time, gas field increases year by year, and shaft bottom hydrops is also more serious, it is ensured that gas well deliverability is normal
It plays and solves the problems, such as that the contradiction between wellbore effusion becomes increasingly conspicuous.The high hydrops of gas well low yield energy, which becomes, restricts gas well liquid loading economy
Key factor, scale carry out water pumping gas production become solves the problems, such as this effective means.
Main drainage measure has foaming water discharge, Concentric capillary tubing technology, vortex to drain at this stage, coiled tubing drains,
Interconnection pit shaft excitement drain, Multi-level throttle valve between Continuous gas circulation, speed column draining, plunger lift, deep pump drainage water, well
Mutual assistance drain, note nitrogen, the gas production of minor diameter pipe, slim hole well drilling and production technology, optimizing pipe string gas production, the draining of gas well depth, electric submersible pump,
Jet pump, bubble row are combined with other techniques, although these technologies with its respective advantage in water pumping gas production and hydrops
The drain of halt production gas well plays an important role in reproducing, but generally existing is complicated for operation, poor for applicability, process costs are high,
The problems such as high energy consumption.It is adopted it would therefore be highly desirable to develop a kind of draining easy to operate, that adaptability is extensive and process costs are low, low energy consumption
Gas process.
Invention content
In view of the above-mentioned problems, the present invention provides a kind of water drainage-gas recovery technology method using preset pneumatic type tubing string, it is intended to
A kind of water drainage-gas recovery technology method easy to operate, adaptability is extensive and process costs are low, low energy consumption is provided, while can also be dropped
Pollution during low water pumping gas production to stratum.Technical solution provided by the invention is as follows：
The present invention provides a kind of water drainage-gas recovery technology method using preset pneumatic type tubing string, the water drainage-gas recovery technology method packet
It includes：
Preset pneumatic type tubing string is mounted in gas-producing well, and using insertion seal modules and mounted on the preset close of internal surface of sleeve pipe
Interference fit between sealed tube realizes the insertion sealing of preset pneumatic type tubing string；
Judge whether the shaft bottom hydrops height of the gas-producing well is more than preset height threshold value；
If the shaft bottom hydrops height of the gas-producing well is not more than preset height threshold value, pneumatic inverting module is opened so that formation gas
Body enters the pneumatic inverting module, and then the formation gas is discharged to well head by oil jacket annular space, to realize gas production work(
Energy；
If the shaft bottom hydrops height of the gas-producing well is more than preset height threshold value, switch the pneumatic inverting module so that stratum
Gas enters the pneumatic inverting module, and gas-liquid pressure-boosting module is driven to work, and then by oil jacket annular space by the formation gas
Body is discharged to well head, and the shaft bottom hydrops is discharged to well head by oil pipe, to realize water pumping gas production function.
Optionally, described that preset pneumatic type tubing string is mounted in gas-producing well, and using insertion seal modules and be mounted on
Interference fit between the preset sealing drum of internal surface of sleeve pipe realizes the insertion sealing of preset pneumatic type tubing string, specially：
By gas-liquid pressure-boosting module, pneumatic inverting module and the preset pneumatic type tubing string of seal modules composition is inserted into using oil pipe decentralization
To gas-producing well shaft bottom, and the bottom shaft bottom screen casing of the preset pneumatic type tubing string is inserted into the hydrops of shaft bottom；
It is preset between the sealing drum of internal surface of sleeve pipe in advance using the rubber ring for being inserted into seal modules and by sulfurization
Interference fit, realize preset pneumatic type tubing string insertion sealing.
Optionally, if the shaft bottom hydrops height of the gas-producing well is not more than preset height threshold value, unlatching is pneumatically changed
To module so that formation gas enters the pneumatic inverting module, and then the formation gas is discharged to by well by oil jacket annular space
Mouthful, to realize gas production function, specially：
If the shaft bottom hydrops height of the gas-producing well is not more than preset height threshold value, stratum high pressure gas passes through in casing
The multi-openings that portion is uniformly arranged enter the oil jacket annular space being inserted into below seal modules；
Stratum high pressure gas into the oil jacket annular space being inserted into below seal modules is entered by air motor piston gas entrance
Pneumatic inverting module, driving reversing valve core carry out gap linear reciprocating motion, realize and open pneumatic inverting module so that formation gas
Body enters the pneumatic inverting module, and then the formation gas is discharged to well head by oil jacket annular space, to realize gas production work(
Energy.
Optionally, if the shaft bottom hydrops height of the gas-producing well is more than preset height threshold value, switch described pneumatic
Inverting module is so that formation gas enters the pneumatic inverting module, and gas-liquid pressure-boosting module is driven to work, and then passes through oil jacket
The formation gas is discharged to well head by annular space, and the shaft bottom hydrops is discharged to well head by oil pipe, to realize draining
Gas production function, specifically includes：
If the shaft bottom hydrops height of the gas-producing well is more than preset height threshold value, stratum high pressure gas passes through uniform in the middle part of casing
The multi-openings of setting enter the oil jacket annular space being inserted into below seal modules；
Partially layer high pressure gas into the oil jacket annular space being inserted into below seal modules is entered by air motor piston gas
Mouth enters pneumatic inverting module, and driving reversing valve core carries out gap linear reciprocating motion, realizes commutation function；
Another part stratum high pressure gas into the oil jacket annular space being inserted into below seal modules is entered by power gas entrance
Gas-liquid pressure-boosting module, and air rammer is driven to do linear reciprocating motion, and then it is past to drive upper liquid piston and lower liquid piston to do
Linear motion；
The upper liquid piston does linear reciprocating motion and the oil jacket annulus fluid being inserted into above seal modules is passed through annulus fluid
Entrance sucks center tubing string, and then annulus fluid is discharged to shaft bottom by shaft bottom screen casing；
The lower liquid piston does linear reciprocating motion and shaft bottom hydrops is sucked center tubing string by shaft bottom screen casing；
The liquid for sucking center tubing string is discharged to well head to realize drain function by being inserted into the oil pipe above seal modules；
Enter the stratum high pressure gas of center tubing string, driving commutation by air motor piston gas entrance and power gas entrance
The oil jacket annular space above the insertion seal modules is discharged to by the outlet of weary power gas after spool and air rammer, passes through oil
The formation gas is discharged to well head by set annular space, to realize gas production function.
Optionally, the pneumatic inverting module, driving reversing valve core carry out gap linear reciprocating motion, realize reversing work
Can, specially：
Stratum high pressure gas enters air motor piston cavity of resorption, while air motor piston by air motor piston gas entrance
The stratum high pressure gas of cavity of resorption enters the epicoele of air motor piston by motor piston side gas passage；
Air motor piston moves downward under the pressure difference force effect of stratum high pressure gas since top dead-centre, and drive and institute
The reversing piston that air motor piston coaxial is fixedly connected is stated to move downward；
When reversing piston moves to cushion dashpot bottom, reversing piston drives cushion dashpot to continue to move downward, and then cushion dashpot band
It is dynamic that the change-over valve core being coaxially fixedly connected is driven to move downward, realize that change-over valve core switches to bottom from upper position
It sets；
When starter motor piston motion is to bottom dead centre, the top fluting connection air motor piston of air motor piston rod
Cavity of resorption and guiding valve chamber, stratum high-pressure pneumatic enter guiding valve chamber by the top fluting of air motor piston rod, and guiding valve exists
Start to move upwards from bottom dead centre under the action of the difference force that stratum high pressure gas generates；
When sliding valve movement is to top dead-centre, the side gas passage of the cavity of resorption of jammed spool valve air rammer and pneumatic motor piston it
Between channel, and then under the action of difference force, air motor piston is up moved since bottom dead centre, and drives reversing piston
It moves upwards；
When reversing piston moves upward at the top of cushion dashpot, cushion dashpot is driven to move upwards, cushion dashpot drives the reversal valve
Core moves upwards, and realizes that change-over valve core switches to upper position from lower position.
The present invention at least has the advantages that：
The present invention provides a kind of water drainage-gas recovery technology methods using preset pneumatic type tubing string, pre- by being arranged in gas-producing well
Pneumatic type tubing string is set, and is realized using the interference fit for being inserted into seal modules and between the preset sealing drum of internal surface of sleeve pipe
The insertion of preset pneumatic type tubing string seals, and according to the relationship between the shaft bottom hydrops height and preset height threshold value of gas-producing well,
Automatically switch the gas production function and water pumping gas production function of preset pneumatic type tubing string, the handover operation between function is to be automatically brought into operation, and is cut
It is timely to change easy to operate and function switch, i.e., the water drainage-gas recovery technology method is not only easy to operate, but also adaptability extensively and work
Skill is at low cost, and has lower energy consumption, while can also reduce pollution of the water pumping gas production in the process to stratum.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of flow of water drainage-gas recovery technology method using preset pneumatic type tubing string provided in an embodiment of the present invention
Schematic diagram；
Fig. 2 is the structural schematic diagram of preset pneumatic type tubing string provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of gas-liquid pressure-boosting module provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of gas-liquid pressure-boosting module provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of pneumatic inverting module provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of pneumatic inverting module provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram provided in an embodiment of the present invention for being inserted into seal modules；
Fig. 8 is the structural schematic diagram provided in an embodiment of the present invention for being inserted into seal modules.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Term " first ", " second ", " third " in description and claims of this specification and above-mentioned attached drawing, "
Four ", " 5th ", " the 6th ", " the 7th " and " the 8th " etc.（If there is）It is for distinguishing similar object, without being used to retouch
State specific sequence or precedence.It should be appreciated that the data used in this way can be interchanged in the appropriate case, to retouch here
The embodiment of the present invention stated can for example be implemented with the sequence other than those of illustrating or describing herein.In addition, art
Language " comprising " and " having " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of
Step or the process of unit, method, system, product or equipment those of are not necessarily limited to clearly to list step or unit, but
It is may include not listing clearly or for the intrinsic other steps of these processes, method, product or equipment or unit.
Shown in Fig. 1 ~ Fig. 8, a kind of draining using preset pneumatic type tubing string of the embodiment of the present invention is adopted
Gas process is described in detail.
Refering to what is shown in Fig. 1, a kind of water drainage-gas recovery technology method using preset pneumatic type tubing string of the embodiment of the present invention, packet
It includes：
Step 110：Preset pneumatic type tubing string is mounted in gas-producing well, and using insertion seal modules and is mounted on internal surface of sleeve pipe
Preset sealing drum between interference fit realize the insertion sealing of preset pneumatic type tubing string.
Refering to what is shown in Fig. 2, preset pneumatic type tubing string used in the embodiment of the present invention include casing 1, sealing drum 2, perforation 3,
Gas-liquid pressure-boosting module 4, pneumatic inverting module 5 and insertion seal modules 6.Wherein, casing 1 is fixed on by well cementing process in gas well
Wall, preset sealing drum 2 are tubular rubber ring, are embedded in advance by sulfurization on the groove of the upper position of 1 inner wall of casing,
Multi-openings 3 are uniformly arranged in 1 medium position of casing, and center tubing string is changed by insertion seal modules 6, pneumatically successively from top to bottom
Be threadably secured connection to module 5 and gas-liquid boost module 4, the oil connection 6.9 on center tubing string top by screw thread with it is upper
Square oil pipe is fixedly connected, and is inserted into rubber ring 6.5 in seal modules 6 and is realized sealing by being interference fitted with preset sealing drum 2, in
Heart tubing string bottom shaft bottom screen casing 4.17 is inserted into the hydrops of shaft bottom, to realize the discharge of shaft bottom hydrops.
Wherein, with reference to shown in figure 3 and Fig. 4, gas-liquid pressure-boosting module 4 is mainly by lower liquid piston 4.1, shaft bottom hydrops runner
Section 4.2, upper liquid piston 4.3, one-piece piston bar 4.4, air rammer 4.5, runner change-over panel 4.6, air rammer upper cylinder half
4.7, cylinder 4.10, the first check valve 4.11, liquid under air rammer middle cylinder 4.8, annulus fluid runner hypomere 4.9, air rammer
Cylinder 4.15, liquid piston cylinder under piston upper cylinder half 4.12, liquid piston cylinder bottom end cover 4.13, the second check valve 4.14, liquid piston
Capping 4.16, shaft bottom screen casing 4.17, third check valve 4.18, the first shaft bottom hydrops runner hypomere 4.19, the 4th check valve 4.20,
Shaft bottom hydrops conversion runner 4.21, power gas channel hypomere 4.22, power gas channel hypomere 4.23, the 5th check valve
4.24, the second shaft bottom hydrops runner hypomere 4.25, the 6th check valve 4.26.
Wherein, with reference to shown in figure 5 and Fig. 6, pneumatic inverting module 5 is mainly by the first power gas channel epimere 5.1, commutation
Cylinder 5.2, the second power gas channel epimere 5.3, commutation cylinder end cap 5.4, reversing valve core 5.5, reversing valve core connecting rod 5.6, buffering
Cylinder 5.7, reversing piston 5.8, reversing piston connecting rod 5.9, guiding valve side gas passage 5.10, guiding valve 5.11, air motor piston
Side gas passage 5.12, air motor piston cylinder 5.13, air motor piston 5.14, air motor piston rod 5.15, gas
Cylinder 5.18, guiding valve under dynamic motor piston connecting rod top fluting 5.16, air motor piston gas entrance 5.17, air motor piston
Cylinder sleeve 5.20, guiding valve pedestal 5.21, air motor pedestal 5.22, buffering outer shell 5.23, weary power gas under upper cylinder sleeve 5.19, guiding valve
Body passing away 5.24, the outer cylinder end cap 5.25 of buffering, reversing valve core commutation channel 5.26, power gas entrance 5.27, reversing cylinder
5.28, the second power gas channel stage casing 5.29, power gas commutation channel 5.30, shaft bottom hydrops runner epimere 5.31, guiding valve
Pedestal cavity of resorption 5.32, guiding valve chamber 5.33, annulus fluid runner epimere 5.34 and pneumatic motor piston connecting rod lower part fluting 5.35
Composition.
With reference to shown in figure 7 and Fig. 8, seal modules 6 are inserted into mainly by weary power airway 6.1, insertion sealer main body
6.2, it is inserted into sealer bottom end cover 6.3, sealer lower piston 6.4, rubber ring 6.5 is inserted into, is inserted into sealer upper piston 6.6, inserts
Enter sealer upper end cover 6.7, weary power gas outlet 6.8, oil connection 6.9, annulus fluid conduit 6.10, be inserted into bullet under sealer
Spring 6.11 is inserted into sealer lower through-hole 6.12, is inserted into through-hole 6.13 on sealer, is inserted into spring 6.14, annular space liquid on sealer
Body entrance 6.15 and insertion sealer shell 6.16 form.
Specifically, the preset pneumatic type pipe that gas-liquid pressure-boosting module 4, pneumatic inverting module 5 and insertion seal modules 6 are formed
Column is transferred using oil pipe to gas-producing well shaft bottom, and the bottom shaft bottom screen casing of preset pneumatic type tubing string is made to be inserted into shaft bottom hydrops
In；Then the rubber ring 6.5 for being inserted into seal modules 6 and the sealing drum 2 for being preset at 1 inner wall of casing in advance by sulfurization are used
Between interference fit, realize preset pneumatic type tubing string insertion sealing.
Step 120：Judge whether the shaft bottom hydrops height of the gas-producing well is more than preset height threshold value.
Specifically, by detecting shaft bottom hydrops height in the preset liquid level sensor in shaft bottom, and then automatic decision gas-producing well
Whether shaft bottom hydrops height is more than preset height threshold value.Wherein, for the setting of the specific size of preset height threshold value, the present invention
Embodiment is not specifically limited.Exemplary, preset height threshold value can be 1 meter.
Step 130：If the shaft bottom hydrops height of the gas-producing well is not more than preset height threshold value, pneumatic commutation mould is opened
The formation gas and then is discharged to well head so that formation gas enters the pneumatic inverting module by block by oil jacket annular space,
To realize gas production function.
Specifically, when if the shaft bottom hydrops height of gas-producing well is not more than preset height threshold value, stratum high pressure gas passes through set
The multi-openings being uniformly arranged in the middle part of pipe enter the oil jacket annular space being inserted into below seal modules；Into below insertion seal modules
The stratum high pressure gas of oil jacket annular space by air motor piston gas entrance enter pneumatic inverting module, driving reversing valve core into
Gap linear reciprocating motion in the ranks is realized and opens pneumatic inverting module so that formation gas enters pneumatic inverting module, and then passes through
Formation gas is discharged to well head by oil jacket annular space, to realize gas production function.
Further, with reference to shown in 2 ~ Fig. 8 of figure, if the shaft bottom hydrops height of gas-producing well is not more than preset height threshold value,
Stratum high pressure gas enters the oil jacket annular space for being inserted into 6 lower section of seal modules by the multi-openings 3 that 1 middle part of casing is evenly arranged,
The stratum high pressure gas being inserted into 6 lower section oil jacket annular space of seal modules is entered pneumatic by air motor piston gas entrance 5.17
Inverting module 5 drives 5.5 gap linear reciprocating motion of reversing valve core, realize open pneumatic inverting module 5 so that formation gas into
Enter pneumatic inverting module, and then formation gas is discharged to by well head by oil jacket annular space, to realize gas production function.
Step 140：If the shaft bottom hydrops height of the gas-producing well is more than preset height threshold value, switch the pneumatic commutation
Module is so that formation gas enters the pneumatic inverting module, and gas-liquid pressure-boosting module is driven to work, and then passes through oil jacket annular space
The formation gas is discharged to well head, and the shaft bottom hydrops is discharged to by well head by oil pipe, to realize water pumping gas production
Function.
Specifically, when if the shaft bottom hydrops height of gas-producing well is more than preset height threshold value, stratum high pressure gas passes through casing
The multi-openings that middle part is uniformly arranged enter the oil jacket annular space being inserted into below seal modules；Into the oil being inserted into below seal modules
The partially layer high pressure gas for covering annular space enters pneumatic inverting module by air motor piston gas entrance, drives reversal valve
Core carries out gap linear reciprocating motion, realizes commutation function；Into the another part for the oil jacket annular space being inserted into below seal modules
Stratum high pressure gas enters gas-liquid pressure-boosting module by power gas entrance, and air rammer is driven to do linear reciprocating motion, into
And upper liquid piston and lower liquid piston is driven to do linear reciprocating motion；Upper liquid piston, which does linear reciprocating motion, will be inserted into sealing
Oil jacket annulus fluid above module sucks center tubing string by annulus fluid entrance, and then by shaft bottom screen casing annulus fluid
It is discharged to shaft bottom；Lower liquid piston does linear reciprocating motion and shaft bottom hydrops is sucked center tubing string by shaft bottom screen casing；By inserting
Enter the oil pipe above seal modules and the liquid for sucking center tubing string is discharged to well head to realize drain function；Pass through air motor
Piston gas entrance and power gas entrance enter the stratum high pressure gas of center tubing string, drive reversing valve core and air rammer it
The oil jacket annular space above the insertion seal modules is discharged to by the outlet of weary power gas afterwards, by oil jacket annular space by the stratum
Gas is discharged to well head, to realize gas production function.
Further, stratum high pressure gas enters air motor piston cavity of resorption by air motor piston gas entrance, together
When air motor piston cavity of resorption stratum high pressure gas the upper of air motor piston is entered by motor piston side gas passage
Chamber；Air motor piston moves downward under the pressure difference force effect of stratum high pressure gas since top dead-centre, and drive with it is pneumatic
The reversing piston that motor piston is fixedly and coaxially connected moves downward；When reversing piston moves to cushion dashpot bottom, reversing piston
Cushion dashpot is driven to continue to move downward, and then cushion dashpot drives the change-over valve core being coaxially fixedly connected to transport downwards
It is dynamic, realize that change-over valve core switches to lower position from upper position；When air motor piston motion is to bottom dead centre, air motor is lived
The cavity of resorption and guiding valve chamber of the top fluting connection air motor piston of connecting rod are filled in, stratum high-pressure pneumatic passes through air motor piston
The top fluting of connecting rod enters guiding valve chamber, and guiding valve starts under the action of the difference force that stratum high pressure gas generates from bottom dead centre
It moves upwards；When sliding valve movement is to top dead-centre, the side gas of the cavity of resorption of jammed spool valve air rammer and pneumatic motor piston
Channel between channel, and then under the action of difference force, air motor piston is up moved since bottom dead centre, and band is moved
To piston upwards；When reversing piston moves upward at the top of cushion dashpot, cushion dashpot is driven to move upwards, cushion dashpot drives
Reversing valve core moves upwards, and realizes that change-over valve core switches to upper position from lower position.
Further, with reference to shown in 2 ~ Fig. 8 of figure, if the shaft bottom hydrops height of gas-producing well is more than preset height threshold value, ground
Layer high pressure gas enters the oil jacket annular space for being inserted into 6 lower section of seal modules by the multi-openings 3 that 1 middle part of casing is evenly arranged, and inserts
The stratum high pressure gas entered in 6 lower section oil jacket annular space of seal modules is pneumatically changed by the entrance of air motor piston gas entrance 5.17
To module 5,5.5 gap linear reciprocating motion of reversing valve core is driven, realizes commutation function；Into being inserted into, 6 lower section of seal modules is oily
The aerial stratum high pressure gas of lantern ring enters gas-liquid pressure-boosting module 4 by power gas entrance 5.27, and driving air rammer 4.5 is done
Linear reciprocating motion, to driving done with the co-axially fixed upper liquid piston 4.3 of air rammer 4.5 and lower liquid piston 4.1 it is past
Linear motion, upper liquid piston 4.3, which does linear reciprocating motion, to lead to the oil jacket annulus fluid of 6 top of insertion seal modules
It crosses annulus fluid entrance 6.15 and sucks center tubing string, and annulus fluid is discharged to by shaft bottom screen casing 4.17 by shaft bottom, lower liquid
Piston 4.1, which does linear reciprocating motion, to suck center tubing string by shaft bottom screen casing 4.17 shaft bottom hydrops, and close by being inserted into
The oil pipe of 6 top of envelope module is discharged to well head, realizes drain function；Pass through air motor piston gas entrance 5.17 and power gas
Body entrance 5.27 enters the stratum high pressure gas of center tubing string, after driving reversing valve core and air rammer, passes through weary power gas
Outlet 6.8 is discharged to the oil jacket annular space for being inserted into 6 top of seal modules, and the oil jacket annular space by being inserted into 6 top of seal modules is arranged
Go out to well head, realizes gas production function.
Moreover, a kind of water drainage-gas recovery technology method use using preset pneumatic type tubing string of the embodiment of the present invention is preset
Pneumatic type tubing string, 4.17 side of shaft bottom screen casing middle part are evenly arranged multiple shaft bottom screen casing lateral apertures, and shaft bottom screen casing lateral aperture is
Through-hole with certain angle of inclination, shaft bottom hydrops can form eddy flow when sucking center tubing string by shaft bottom screen casing 4.17,
So that the gravel in the hydrops of shaft bottom is deposited to 4.17 bottom center of shaft bottom screen casing, and pass through 4.17 bottom center of shaft bottom screen casing
The multiple shaft bottom screen casing bottom holes being evenly arranged are discharged to shaft bottom, realize sand-proof function.
With reference to shown in 2 ~ Fig. 8 of figure, local layer high pressure gas is from the second power gas channel hypomere 4.23 into fashionable, ground floor height
Body of calming the anger enters the lower chambers of air rammer 4.5 by 4.5 lower right through-hole of air rammer, to push air rammer 4.5 past
Upper movement, and then drive and up moved with the co-axially fixed upper liquid piston 4.3 of air rammer 4.5 and lower liquid piston 4.1, gas
The weary power gas of 4.5 upper chamber of piston enters the first power gas channel hypomere 4.22 through 4.5 upper left side through-hole of air rammer,
And then it is discharged to pneumatic inverting module 5.
With reference to shown in 2 ~ Fig. 8 of figure, since upper liquid piston 4.3 moves upwards, the weary power gas of 4.3 upper chamber of upper liquid piston
Body enters the first power gas channel hypomere 4.22 through 4.3 upper left side through-hole of upper liquid piston, and then is discharged to pneumatic commutation mould
Block 5,4.3 cavity of resorption of upper liquid piston form low-pressure area, the annular space of 4.14 top of the second check valve in annulus fluid runner hypomere 4.9
Liquid enters 4.3 cavity of resorption of upper liquid piston by 4.3 lower right through-hole of upper liquid piston.
With reference to shown in 2 ~ Fig. 8 of figure, since lower liquid piston 4.1 moves upwards, the shaft bottom product in lower 4.1 epicoele of liquid piston
Liquid enters the second shaft bottom hydrops runner hypomere 4.25 through 4.1 upper right side through-hole of lower liquid piston, then descends on liquid piston 4.1
Shaft bottom hydrops in chamber passes through the 5th check valve 4.24, and is discharged to pneumatic inverting module 5 through shaft bottom hydrops conversion runner 4.21,
Lower 4.1 cavity of resorption of liquid piston forms low-pressure area, and shaft bottom hydrops enters the first well through shaft bottom screen casing 4.17 and third check valve 4.18
Bottom hydrops runner hypomere 4.19, and enter 4.1 cavity of resorption of lower liquid piston by lower 4.1 lower left through-hole of liquid piston.
With reference to shown in 2 ~ Fig. 8 of figure, local layer high pressure gas is from the first power gas channel hypomere 4.22 into fashionable, ground floor height
Body of calming the anger enters 4.5 upper chamber of air rammer by 4.5 upper left side through-hole of air rammer, to push air rammer 4.5 down
Movement, and then drive and moved down with the co-axially fixed upper liquid piston 4.3 of air rammer 4.5 and lower liquid piston 4.1, pneumatically
The weary power gas of 4.5 lower chambers of piston enters power gas channel B hypomeres 4.23 through 4.5 lower right through-hole of air rammer, in turn
It is discharged to pneumatic inverting module 5.
With reference to shown in 2 ~ Fig. 8 of figure, since upper liquid piston 4.3 moves downward, 4.3 lower chambers annulus fluid of upper liquid piston
Enter the first power gas channel hypomere 4.22 through 4.3 lower right through-hole of upper liquid piston, and then passes through the second check valve 4.14
It is discharged to shaft bottom hydrops with shaft bottom screen casing 4.17,4.3 epicoele of upper liquid piston forms low-pressure area, the first power gas channel hypomere
High pressure gas in 4.22 enters 4.3 epicoele of upper liquid piston by 4.3 upper left side through-hole of upper liquid piston,
With reference to shown in 2 ~ Fig. 8 of figure, since lower liquid piston 4.1 moves downward, the shaft bottom hydrops warp in lower 4.1 cavity of resorption of liquid piston
4.1 lower left through-hole of lower liquid piston enters the first shaft bottom hydrops runner hypomere 4.19, then descends in 4.1 cavity of resorption of liquid piston
Shaft bottom hydrops pass through the 4th check valve 4.20, and through shaft bottom hydrops conversion runner 4.21 be discharged to pneumatic inverting module 5, lower liquid
4.1 epicoele of body piston forms low-pressure area, and shaft bottom hydrops enters the second shaft bottom through shaft bottom screen casing 4.17 and the 6th check valve 4.26 and accumulates
Liquid stream road hypomere 4.25, and enter 4.1 epicoele of lower liquid piston by lower 4.1 upper right side through-hole of liquid piston.
Particularly, there are three power end air rammers 4.5, liquid piston 4.1 and upper liquid piston 4.3 respectively have under fluid end
One, and pneumatic piston area is more than liquid piston 4.1 and upper liquid piston 4.3, so power end air rammer 4.5 is effective
Active area is more than the effective active area of liquid piston 4.1 and upper liquid piston 4.3 under fluid end, therefore one-piece piston has
There is gas-liquid pressure-boosting effect.
With reference to shown in 2 ~ Fig. 8 of figure, air motor piston 5.14 is located at top dead-centre when initial, and stratum high pressure gas passes through pneumatic
Motor piston gas access 5.17 enters 5.14 cavity of resorption of air motor piston, while the ground floor height of 5.14 cavity of resorption of air motor piston
Body of calming the anger enters 5.14 epicoele of air motor piston by air motor piston side gas passage 5.12, since air motor is lived
It fills in 5.14 upper surface areas and is more than lower surface area, so acting on 5.14 upper surface gross pressure of air motor piston is more than following table
Face gross pressure, therefore air motor piston 5.14 moves down since top dead-centre, air motor piston 5.14 moves band down
The dynamic reversing piston 5.8 being fixedly and coaxially connected with air motor piston 5.14 moves downward, when reversing piston 5.8 moves to buffering
When 5.7 bottom of cylinder, reversing piston 5.8 drives cushion dashpot 5.7 to continue to move downward, and cushion dashpot 5.7 moves downward drive and buffering
The reversing valve core 5.5 that cylinder 5.7 is fixedly and coaxially connected moves downward, and reversing valve core 5.5 is switched to lower position by upper position at this time.
With reference to shown in 2 ~ Fig. 8 of figure, when air motor piston 5.14 moves to bottom dead centre, air motor piston rod top
Fluting 5.16 has been connected to 5.14 cavity of resorption of air motor piston and guiding valve chamber 5.33, and stratum high pressure gas passes through air motor piston
Connecting rod top fluting 5.16 enters guiding valve chamber 5.33 by 5.14 cavity of resorption of air motor piston, due to 5.11 upper surface area of guiding valve
Less than lower surface area, thus act on 5.11 upper surface gross pressure of guiding valve be less than lower surface gross pressure, therefore guiding valve 5.11 from
Bottom dead centre starts up to move, and when guiding valve 5.11 moves to top dead-centre, guiding valve 5.11 plugs under air motor piston 5.14
Channel between chamber and pneumatic motor piston side gas passage 5.12, while 5.14 epicoele of air motor piston passes through pneumatic horse
Up to piston side gas passage 5.12, annular space, guiding valve side gas passage 5.10 and the guiding valve pedestal at 5.11 middle part of guiding valve
Cavity of resorption 5.32 is connected to, and guiding valve pedestal cavity of resorption 5.32 passes through 5.21 lower right through-hole of guiding valve pedestal and weary power gas passing away
5.24 connections, weary power gas pressure are less than stratum high pressure gas, and under the action of pressure difference, air motor piston 5.14 is under
Dead point starts up to move, and air motor piston 5.14 up moves what drive was fixedly and coaxially connected with air motor piston 5.14
Reversing piston 5.8 moves upwards, and when reversing piston 5.8 moves to 5.7 top of cushion dashpot, reversing piston 5.8 drives cushion dashpot
5.7 continue up, and it is upward that cushion dashpot 5.7 moves upwards the reversing valve core 5.5 that drive and cushion dashpot 5.7 are fixedly and coaxially connected
Movement, reversing valve core 5.5 is switched to upper position by lower position at this time.
With reference to shown in 2 ~ Fig. 8 of figure, when air motor piston 5.14 is re-moved to top dead-centre, air motor piston rod
Lower part fluting 5.35 has been connected to guiding valve chamber 5.33 and guiding valve pedestal cavity of resorption 5.32, and 5.11 upper surface of guiding valve is still stratum at this time
High pressure gas, 5.11 lower surface of guiding valve are weary power gas, and weary power gas pressure is less than stratum high pressure gas, in pressure difference
Under effect, guiding valve 5.11 moves to bottom dead centre from top dead-centre, completes the pneumatic commutation function of a cycle.
With reference to shown in 2 ~ Fig. 8 of figure, 6 top of insertion seal modules is threadably secured with oil pipe to be connect, and seal modules 6 are inserted into
Realize that sealing, preset sealing drum 2 pass through with the interference fit of preset sealing drum 2 by a plurality of rubber ring 6.5 being evenly arranged in middle part
Sulfurization is embedded in advance on 1 inner wall of casing, and 2 internal diameter of preset sealing drum is less than 1 internal diameter of casing, facilitates insertion into sealed mould
Block 6 is inserted into sealing positioning, and 6 lower section of insertion seal modules is threadably secured with pneumatic inverting module 5 to be connect.
Further, with reference to shown in 2 ~ Fig. 8 of figure, gas-liquid channel mainly include annulus fluid runner, shaft bottom hydrops runner and
Gas passage；In annulus fluid runner, the oil jacket annulus fluid for being inserted into 6 top of seal modules passes through annulus fluid entrance 6.15
Into annulus fluid conduit 6.10, and then annulus fluid enters and is threadably secured the annular space being connected to annulus fluid conduit 6.10
Flow channel for liquids epimere 5.34, annulus fluid go successively to the annulus fluid runner hypomere being connected to annulus fluid runner epimere 5.34
4.9, and shaft bottom is discharged to by shaft bottom screen casing 4.17.
With reference to shown in 2 ~ Fig. 8 of figure, in the hydrops runner of shaft bottom, shaft bottom hydrops enters the first shaft bottom by shaft bottom screen casing 4.17
Hydrops runner hypomere 4.19 and the second shaft bottom hydrops runner hypomere 4.25, then shaft bottom hydrops pass through shaft bottom hydrops convert runner
4.21 enter shaft bottom hydrops runner stage casing 4.2, and shaft bottom hydrops enters shaft bottom hydrops runner by shaft bottom hydrops conversion runner later
Epimere 5.31, and well head is discharged to by oil pipe.
With reference to shown in 2 ~ Fig. 8 of figure, in gas passage, when reversing valve core 5.5 is located above position, stratum high pressure gas
Enter center tubing string by power gas entrance 5.27, and the second power gas is entered by reversing valve core commutation channel 5.26 and is led to
Road epimere 5.3, then stratum high pressure gas is by power gas commutation channel 5.30 the second power gas channel stage casing of entrance
5.29, and enter the second power gas channel hypomere 4.23 by runner ALT-CH alternate channel, then stratum high pressure gas is by pneumatic
4.5 side through-hole of piston enters 4.5 lower chambers of air rammer, to push air rammer 4.5 up to move, air rammer 4.5
The weary power gas of upper chamber enters the first power gas channel hypomere 4.22 through 4.5 side through-hole of air rammer, and enters and the
One power gas channel hypomere 4.22 connection the first power gas channel epimere 5.1, then weary power gas pass through reversal valve
Core commutates channel 5.26 into weary power gas passing away 5.24, and passes sequentially through weary power airway 6.1 and weary power gas
Outlet 6.8 is discharged to weary power gas the oil jacket annular space for being inserted into 6 top of seal modules, and by being inserted into 6 top of seal modules
Oil jacket annular space be discharged to well head.
With reference to shown in 2 ~ Fig. 8 of figure, when reversing valve core 5.5 is located at lower position, stratum high pressure gas passes through power gas
Entrance 5.27 enters center tubing string, and commutates channel 5.26 into the first power gas channel epimere 5.1, so by reversing valve core
Stratum high pressure gas enters the first power gas channel hypomere 4.22 being connected to the first power gas channel epimere 5.1 afterwards, so
Stratum high pressure gas enters 4.5 upper chamber of air rammer by 4.5 side through-hole of air rammer afterwards, to push air rammer
4.5 move down, and the weary power gas of 4.5 lower chambers of air rammer enters the second power gas through 4.5 side through-hole of air rammer
Channel hypomere 4.23, and enter the second power gas channel stage casing 5.29 by runner ALT-CH alternate channel, then weary power gas passes through
It crosses power gas commutation channel 5.30 and enters the second power gas channel epimere 5.3, and pass through reversing valve core commutation channel 5.26
Into weary power gas passing away 5.24, weary power airway 6.1 and weary power gas outlet 6.8 are then passed sequentially through, weary
Power gas is discharged to the oil jacket annular space for being inserted into 6 top of seal modules, and the oil jacket annular space by being inserted into 6 top of seal modules is arranged
Go out to well head.
The present invention provides a kind of water drainage-gas recovery technology methods using preset pneumatic type tubing string, by being set in gas-producing well
Preset pneumatic type tubing string is set, and using insertion seal modules and the interference fit between the preset sealing drum of internal surface of sleeve pipe
Realize the insertion sealing of preset pneumatic type tubing string, and according to the pass between the shaft bottom hydrops height and preset height threshold value of gas-producing well
System, automatically switches the gas production function and water pumping gas production function of preset pneumatic type tubing string, and the handover operation between function is to be automatically brought into operation,
Handover operation is simple and function switch is timely, i.e., the water drainage-gas recovery technology method is not only easy to operate, and adaptability extensively and
Process costs are low, and have lower energy consumption, while can also reduce pollution of the water pumping gas production in the process to stratum.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (5)
1. a kind of water drainage-gas recovery technology method using preset pneumatic type tubing string, which is characterized in that the water drainage-gas recovery technology side
Method includes：
Preset pneumatic type tubing string is mounted in gas-producing well, and using insertion seal modules and mounted on the preset close of internal surface of sleeve pipe
Interference fit between sealed tube realizes the insertion sealing of preset pneumatic type tubing string；
Judge whether the shaft bottom hydrops height of the gas-producing well is more than preset height threshold value；
If the shaft bottom hydrops height of the gas-producing well is not more than preset height threshold value, pneumatic inverting module is opened so that formation gas
Body enters the pneumatic inverting module, and then the formation gas is discharged to well head by oil jacket annular space, to realize gas production work(
Energy；
If the shaft bottom hydrops height of the gas-producing well is more than preset height threshold value, switch the pneumatic inverting module so that stratum
Gas enters the pneumatic inverting module, and gas-liquid pressure-boosting module is driven to work, and then by oil jacket annular space by the formation gas
Body is discharged to well head, and the shaft bottom hydrops is discharged to well head by oil pipe, to realize water pumping gas production function.
2. water drainage-gas recovery technology method according to claim 1, which is characterized in that described to install preset pneumatic type tubing string
It is realized in advance in gas-producing well, and using the interference fit for being inserted into seal modules and between the preset sealing drum of internal surface of sleeve pipe
The insertion sealing of pneumatic type tubing string is set, specially：
By gas-liquid pressure-boosting module, pneumatic inverting module and the preset pneumatic type tubing string of seal modules composition is inserted into using oil pipe decentralization
To gas-producing well shaft bottom, and the bottom shaft bottom screen casing of the preset pneumatic type tubing string is inserted into the hydrops of shaft bottom；
It is preset between the sealing drum of internal surface of sleeve pipe in advance using the rubber ring for being inserted into seal modules and by sulfurization
Interference fit, realize preset pneumatic type tubing string insertion sealing.
3. water drainage-gas recovery technology method according to claim 1, which is characterized in that if the shaft bottom product of the gas-producing well
Liquid height be not more than preset height threshold value when, open pneumatic inverting module so that formation gas enter the pneumatic inverting module,
And then the formation gas is discharged to by well head by oil jacket annular space, to realize gas production function, specially：
If the shaft bottom hydrops height of the gas-producing well is not more than preset height threshold value, stratum high pressure gas passes through in casing
The multi-openings that portion is uniformly arranged enter the oil jacket annular space being inserted into below seal modules；
Stratum high pressure gas into the oil jacket annular space being inserted into below seal modules is entered by air motor piston gas entrance
Pneumatic inverting module, driving reversing valve core carry out gap linear reciprocating motion, realize and open pneumatic inverting module so that formation gas
Body enters the pneumatic inverting module, and then the formation gas is discharged to well head by oil jacket annular space, to realize gas production work(
Energy.
4. water drainage-gas recovery technology method according to claim 1, which is characterized in that if the shaft bottom product of the gas-producing well
When liquid height is more than preset height threshold value, switch the pneumatic inverting module so that formation gas enters the pneumatic commutation mould
Block, and gas-liquid pressure-boosting module is driven to work, and then the formation gas is discharged to by well head by oil jacket annular space, and pass through oil
The shaft bottom hydrops is discharged to well head by pipe, to realize water pumping gas production function, is specifically included：
If the shaft bottom hydrops height of the gas-producing well is more than preset height threshold value, stratum high pressure gas passes through uniform in the middle part of casing
The multi-openings of setting enter the oil jacket annular space being inserted into below seal modules；
Partially layer high pressure gas into the oil jacket annular space being inserted into below seal modules is entered by air motor piston gas
Mouth enters pneumatic inverting module, and driving reversing valve core carries out gap linear reciprocating motion, realizes commutation function；
Another part stratum high pressure gas into the oil jacket annular space being inserted into below seal modules is entered by power gas entrance
Gas-liquid pressure-boosting module, and air rammer is driven to do linear reciprocating motion, and then it is past to drive upper liquid piston and lower liquid piston to do
Linear motion；
The upper liquid piston does linear reciprocating motion and the oil jacket annulus fluid being inserted into above seal modules is passed through annulus fluid
Entrance sucks center tubing string, and then annulus fluid is discharged to shaft bottom by shaft bottom screen casing；
The lower liquid piston does linear reciprocating motion and shaft bottom hydrops is sucked center tubing string by shaft bottom screen casing；
The liquid for sucking center tubing string is discharged to well head to realize drain function by being inserted into the oil pipe above seal modules；
Enter the stratum high pressure gas of center tubing string, driving commutation by air motor piston gas entrance and power gas entrance
The oil jacket annular space above the insertion seal modules is discharged to by the outlet of weary power gas after spool and air rammer, passes through oil
The formation gas is discharged to well head by set annular space, to realize gas production function.
5. water drainage-gas recovery technology method according to claim 4, which is characterized in that the pneumatic inverting module, driving are changed
Gap linear reciprocating motion is carried out to spool, realizes commutation function, specially：
Stratum high pressure gas enters air motor piston cavity of resorption, while air motor piston by air motor piston gas entrance
The stratum high pressure gas of cavity of resorption enters the epicoele of air motor piston by motor piston side gas passage；
Air motor piston moves downward under the pressure difference force effect of stratum high pressure gas since top dead-centre, and drive and institute
The reversing piston that air motor piston coaxial is fixedly connected is stated to move downward；
When reversing piston moves to cushion dashpot bottom, reversing piston drives cushion dashpot to continue to move downward, and then cushion dashpot band
It is dynamic that the change-over valve core being coaxially fixedly connected is driven to move downward, realize that change-over valve core switches to bottom from upper position
It sets；
When starter motor piston motion is to bottom dead centre, the top fluting connection air motor piston of air motor piston rod
Cavity of resorption and guiding valve chamber, stratum high-pressure pneumatic enter guiding valve chamber by the top fluting of air motor piston rod, and guiding valve exists
Start to move upwards from bottom dead centre under the action of the difference force that stratum high pressure gas generates；
When sliding valve movement is to top dead-centre, the side gas passage of the cavity of resorption of jammed spool valve air rammer and pneumatic motor piston it
Between channel, and then under the action of difference force, air motor piston is up moved since bottom dead centre, and drives reversing piston
It moves upwards；
When reversing piston moves upward at the top of cushion dashpot, cushion dashpot is driven to move upwards, cushion dashpot drives the reversal valve
Core moves upwards, and realizes that change-over valve core switches to upper position from lower position.
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| CN201810194453.0A CN108361006B (en) | 2018-03-09 | 2018-03-09 | Drainage and gas production process method adopting preset pneumatic pipe column |
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| CN110593822A (en) * | 2019-09-27 | 2019-12-20 | 西南石油大学 | Method for removing accumulated liquid at bottom of water-gas-producing well |
| CN111101907A (en) * | 2019-12-31 | 2020-05-05 | 陕西汇丰悦石油科技开发有限公司 | Underground self-excitation type liquid and gas drainage device |
| CN112377155A (en) * | 2020-11-17 | 2021-02-19 | 中国石油天然气股份有限公司 | Liquid drainage and gas production integrated method after fracturing modification of low-pressure water-containing reservoir |
| CN113417607A (en) * | 2021-08-05 | 2021-09-21 | 北京中海沃邦能源投资有限公司石楼分公司 | Continuous pressure-increasing drainage and production equipment for low-pressure high-yield water well |
| CN113914826A (en) * | 2021-10-14 | 2022-01-11 | 贵州页岩气勘探开发有限责任公司 | Composite continuous pipe gas production method |
| CN115788383A (en) * | 2023-02-03 | 2023-03-14 | 陕西万普隆油气技术服务有限公司 | Gas well pumping bubble row integrated liquid discharge device |
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