CN208633791U - A kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing - Google Patents
A kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing Download PDFInfo
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- CN208633791U CN208633791U CN201821199285.6U CN201821199285U CN208633791U CN 208633791 U CN208633791 U CN 208633791U CN 201821199285 U CN201821199285 U CN 201821199285U CN 208633791 U CN208633791 U CN 208633791U
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- mandrel
- screen casing
- spray head
- reinforced plastic
- glass reinforced
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Abstract
The utility model discloses a kind of coal bed gas well well-flushing tools for crossing glass reinforced plastic screen casing, including washing pipe, fluidic oscillation nozzle, waterpower packing formula spray head, pressure regulator and guide head；The washing pipe is arranged in the center of glass reinforced plastic screen casing, and the first elastic supporting positive cover is provided between washing pipe and glass reinforced plastic screen casing, and washing pipe is successively connect with fluidic oscillation nozzle, waterpower packing formula spray head, pressure regulator and guide head.The coal bed gas well-flushing of screen casing is crossed since the gap of screen casing is bigger, flow velocity becomes smaller after the high-pressure fluid of well-flushing tool release crosses screen casing, and corresponding cleaning effect is not achieved；The movement that the utility model passes through waterpower excluder ring and movable pressing sleeve in the process of cleaning can shrink extrusion fluid space, increase the fluid velocity flowed out from screen pipe opening, to enhance cleaning effect.In addition, improving jet cleaning effect using pressure pulse mechanism, there is oscillation chamber in dress mouth body interior design, cleaning effect can be improved by the pressure pulse that oscillation chamber generates.
Description
Technical field
The utility model relates to coal-bed gas exploitation equipment technical field, a kind of glass reinforced plastic screen casing of crossing is concretely related to
Coal bed gas well well-flushing tool.
Background technique
During cbm development, coal bed gas primary attachment is in micropore, and hugger is the main logical of coal bed gas product
The porosity in road, crack has a major impact the permeability in coal seam.Drilling fluid enters crack, can make in following several respects to reservoir
At pollution, reservoir permeability is caused to decline: 1. matrix of coal absorbs liquid and expands, compression fissure, so that reservoir permeability is big
Amplitude decline, and the process is almost irreversible；2. solid phase particles (clay particle, landwaste, flyash in drilling fluid
Deng) blocking crack cause reservoir permeability to decline；3. if containing polymer in drilling fluid, high molecular polymer adsorbing clays particle
Also it can cause the blocking in crack；4. drilling fluid and formation fluid mismatch, precipitating blocking crack is generated.In addition, what drilling well generated
The clasts such as landwaste also can seriously pollute coal seam, and the decline of permeability is caused to will seriously affect the yield of coal bed gas.Drilling process
The pollution of near wellbore zone in the mud cake and drilling process that middle organic matter drilling fluid is formed is the main original for influencing coal bed gas well production capacity
One of because.
It solves coal bed gas well mud cake and pollution problem currently, controllable Hole Opener Treatment of Horizontal Well becomes, improve coal seam
One of the key technology of gas yield.Since the injection water pressure of well-flushing tool is low, presence of cutting seam sieve tube and near wellbore zone
The reasons such as pollution level height, so that well washing effect is poor, well-flushing number increases, and takes a long time.Therefore, the spray of high-pressure fluid is improved
Firing rate degree enhances well washing effect, and can reduce the pollution of near wellbore zone to a certain extent, becomes coal-bed gas exploitation process
In a urgent problem to be solved.
Utility model content
Based on above-mentioned technical problem, the utility model provides a kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing.It should
Well-flushing tool cleans open hole wall through glass reinforced plastic cutting seam sieve tube using fluidics and pressurization packing technology, releases coal bed gas
Well wall cake and near wellbore zone pollution problem.
Technical solution used by the utility model is:
A kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing, including the packing formula spray of washing pipe, fluidic oscillation nozzle, waterpower
Head, pressure regulator and guide head；
The washing pipe is arranged in the center of glass reinforced plastic screen casing, and the first elasticity is provided between washing pipe and glass reinforced plastic screen casing and is helped
Positive set, washing pipe include the tube body for conveying flushing fluid, and the first elastic supporting positive cover is fixed on tube body by baffle ring, and the one of tube body
End is provided with box cupling, and the other end of tube body is connect with fluidic oscillation nozzle；
The fluidic oscillation nozzle includes dress mouth body, and one end of dress mouth body is threadedly coupled with tube body, fills the other end of mouth body
It is provided with connector, the inside of dress mouth body is disposed with the first oscillation chamber being connected between each other and the second oscillation chamber, the first vibration
Chamber is swung to be connected to the inside of tube body；
The waterpower packing formula spray head is located at one end of fluidic oscillation nozzle, and it includes sprayer body and spray that waterpower, which insulates formula spray head,
Head ectosome；
The guide head includes mandrel, and one end of mandrel and dress mouth body are inconsistent, and mandrel is connect with dress mouth body by connector,
It is provided centrally with liquid collecting hole at the end of mandrel, liquid collecting hole is connected to the second oscillation chamber, and the sprayer body is arranged on mandrel, and
Sprayer body is connected with liquid collecting hole, and the outside of sprayer body is arranged in the spray head ectosome, sets between sprayer body and spray head ectosome
It is equipped with waterpower excluder ring, is additionally provided with first seal between spray head ectosome and mandrel；It is provided with and leads in the other end of mandrel
Set is helped, is provided with retaining ring at the end end of mandrel；
Pressure regulator setting is helped between set in spray head ectosome and leading, and pressure regulator includes pressure spring, movable pressing sleeve
Adjust and cover with pressure spring, activity pressure is set on one end of spray head ectosome, and is set on mandrel, pressure spring adjust cover by bolt with
Mandrel is fixedly connected, and the chamber being formed between cover and mandrel for accommodating movable pressing sleeve is adjusted in pressure spring, and pressure spring is arranged in chamber
It is indoor and be connected to movable pressing sleeve and pressure spring is adjusted between cover.
Preferably, the tube body is threadedly coupled with box cupling；Second seal is provided between the connector and mandrel；It is described
It leads to help between set and glass reinforced plastic screen casing and is provided with the second elastic supporting positive cover.
Preferably, the sprayer body includes radial nozzles perpendicular with mandrel direction of extension and several are laid in
Lateral nozzle around radial nozzles.
Preferably, the spray head ectosome is arranged two, and is symmetrically located in the two sides of the mandrel, the corresponding spray head
Body is also provided with two.
Preferably, the first seal and second seal are respectively provided with three, and equal along the outer wall border of mandrel respectively
Even distribution.
The coal bed gas well pumping and washing process of glass reinforced plastic screen casing was carried out using above-mentioned well-flushing tool, the specific steps are as follows:
(1) by the horizontal segment of tool tripping in engineering water horizontal well, high pressure flushing liquid is injected into well-flushing tool and carries out sparging
Well；
(2) well-flushing tool is moved forward by certain speed, high-pressure fluid is through tube body, the first oscillation chamber and the second oscillation chamber
Enter sprayer body afterwards；If the radial nozzles face sieve tube slit of sprayer body, high-velocity fluid directly clean wellbore；If diameter
Without sieve tube slit around to nozzle, then the annular seal space pressure rise that sprayer body and glass reinforced plastic cutting seam sieve tube are formed, waterpower envelope
Spacer ring drive activity pressing sleeve moves down, and has sieve tube slit exposing in folding process, then high-pressure fluid cleans the borehole wall, pressure release；Pressure
After power release, under pressure spring effect, waterpower excluder ring resets；
(3) step (2) are repeated, until mining straight well well head returning fluid is relatively clear, well-flushing is completed.
Compared with prior art, the advantageous effects of the utility model are as follows:
1. crossing the coal bed gas well-flushing of screen casing since the gap of screen casing is bigger, the high-pressure fluid of well-flushing tool release crosses screen casing
Flow velocity becomes smaller afterwards, and corresponding cleaning effect is not achieved；The utility model passes through waterpower excluder ring and activity pressure in the process of cleaning
The movement of set can shrink extrusion fluid space, increase the fluid velocity flowed out from screen pipe opening, to enhance cleaning effect.
2. improving jet cleaning effect using pressure pulse mechanism.There is oscillation chamber in dress mouth body interior design, passes through oscillation
The pressure pulse that chamber generates can be improved cleaning effect.
3. the plaster of near wellbore zone can be cleaned, enhances near wellbore zone coal seam permeability or the cause section that easily collapses and further collapse
It collapses, promotes the release of production capacity, improve the yield of coal bed gas.
4. the utility model structure is simple, works effective and feasible, have broad application prospects.
Detailed description of the invention
The utility model is described in further detail with specific embodiment with reference to the accompanying drawing:
Fig. 1 is the general structure schematic diagram of the utility model coal bed gas well well-flushing tool；
Fig. 2 is the principle schematic diagram of the utility model coal bed gas well well-flushing tool；
Fig. 3 is schematic diagram when the utility model coal bed gas well well-flushing tool carries out coal bed gas well well-flushing.
In figure: 1- horizontal well naked eye, 2- glass reinforced plastic cutting seam sieve tube, the elastic supporting positive cover of 3- first, 31- baffle ring, 4- washing pipe,
41- tube body, 42- box cupling, 5- fluidic oscillation nozzle, 51- dress mouth body, the oscillation chamber of 52- first, the oscillation chamber of 53- second, 54- connector,
6- waterpower insulates formula spray head, 61- sprayer body, 62- spray head ectosome, 63- first seal, 64- waterpower excluder ring, the adjusting of 7- pressure
Device, 71- pressure spring, 72- activity pressing sleeve, 73- pressure spring adjust cover, and 8- guide head, 81- mandrel, 82- retaining ring, 83-, which is led, helps set, and 84- is tight
Determine screw, 91- engineering water horizontal well, 92- mining straight well, 10- liquid collecting hole, 11- chamber, 12- second seal, the second elasticity of 13-
Supporting positive cover.
Specific embodiment
In conjunction with attached drawing, it is a kind of cross glass reinforced plastic screen casing coal bed gas well well-flushing tool, including washing pipe 4, fluidic oscillation nozzle 5,
Waterpower insulates formula spray head 6, pressure regulator 7 and guide head 8.The washing pipe 4 is arranged in the center of glass reinforced plastic cutting seam sieve tube 2,
The outside of glass reinforced plastic cutting seam sieve tube 2 is horizontal well naked eye 1, and the first elasticity is provided between washing pipe 4 and glass reinforced plastic cutting seam sieve tube 2
Supporting positive cover 3.Washing pipe 4 includes the tube body 41 for conveying flushing fluid, and the first elastic supporting positive cover 3 is fixed on tube body 41 by baffle ring 31
On, one end of tube body 41 is provided with box cupling 42, and the other end of tube body 41 is connect with fluidic oscillation nozzle 5.
The fluidic oscillation nozzle 5 includes dress mouth body 51, and one end of dress mouth body 51 is threadedly coupled with tube body 41, fills mouth body 51
The other end be provided with connector 54, the inside of dress mouth body 51 is disposed with the first oscillation chamber 52 and second being connected between each other
Chamber 53 is vibrated, the first oscillation chamber 52 is connected to the inside of tube body 41.The waterpower packing formula spray head 6 is located at fluidic oscillation nozzle 5
One end, waterpower insulate formula spray head 6 include sprayer body 61 and spray head ectosome 62.
The guide head 8 includes mandrel 81, and one end of mandrel 81 and dress mouth body 51 are inconsistent, and mandrel 81 and dress mouth body 51 are logical
The connection of connector 54 is crossed, is provided centrally with liquid collecting hole 10 at the end of mandrel 81, liquid collecting hole 10 is connected to the second oscillation chamber 53, described
Sprayer body 61 is arranged on mandrel 81, and sprayer body 61 is connected with liquid collecting hole 10.The spray head ectosome 62 is arranged in sprayer body
61 outside is provided with waterpower excluder ring 64 between sprayer body 61 and spray head ectosome 62, spray head ectosome 62 and mandrel 81 it
Between be additionally provided with first seal 63.It is provided with to lead in the other end of mandrel 81 and helps set 83, be arranged at the end end of mandrel
There is retaining ring 82.
The pressure regulator 7 setting is helped between set 83 in spray head ectosome 62 and leading, pressure regulator 7 include pressure spring 71,
Movable pressing sleeve 72 and pressure spring adjust cover 73, and one end of spray head ectosome 62 is arranged in movable pressing sleeve 72, and is set on mandrel 81, pressure
Spring adjusts cover 73 and is fixedly connected by holding screw 84 with mandrel 81, adjusts in pressure spring and is formed between cover and mandrel for accommodating
The chamber 11 of movable pressing sleeve, pressure spring 71 is arranged in chamber and is connected to movable pressing sleeve 71 and pressure spring is adjusted between cover 73.
As the further design to the utility model, the tube body 41 is threadedly coupled with box cupling 42；The connector 54 with
Second seal 12 is provided between mandrel 81.It is described lead help set 83 and glass reinforced plastic cutting seam sieve tube 2 between be provided with second elasticity
Supporting positive cover 13.The quantity of first elastic supporting positive cover and the second elastic supporting positive cover can be configured as needed, and be spaced apart, and be used
To keep water-jet well-flushing tool to be located at wellbore center.
Further, the sprayer body 61 include radial nozzles perpendicular with mandrel direction of extension and several
The lateral nozzle being laid in around radial nozzles.
Further, the spray head ectosome is arranged two, and is symmetrically located in the two sides of the mandrel, the corresponding spray
Head body is also provided with two.
Further, the first seal 63 and second seal 12 are respectively provided with three, and respectively along the outer of mandrel
Wall border is uniformly distributed, to guarantee the leakproofness of contact portion.
The course of work and principle of the utility model approximately as:
The working principle of waterpower pulse injection borehole wall well-flushing tool was as shown in Figure 1, cleaned in the utility model embodiment
The mode of the mobile tubing string of Cheng Caiyong carries out, and high pressure water successively vibrates chamber 53, liquid collecting through center tubes, the first oscillation chamber 52, second
Enter sprayer body 61 behind hole 10, is radially and laterally sprayed by multiple nozzles, if radial nozzles face slot, high-velocity fluid can
To inject directly to bore hole annulus, the borehole wall is rinsed.If 61 radial nozzles periphery of sprayer body is without slot, sprayer body 61
The annular seal space pressure rise formed with glass reinforced plastic cutting seam sieve tube, mandrel 81, spray head ectosome 62 and sprayer body 61 are made in pressure
It moves down under, and is moved down by 64 drive activity pressing sleeve 72 of waterpower excluder ring, pressure spring, which adjusts cover 73 and leads, at this time helps set 83 solid
Fixed motionless, pressure spring 71 is compressed.If any slot exposes, high-pressure fluid is directly sprayed from slot for folding process, is carried out to the borehole wall clear
It washes, after pressure release, under the effect of pressure spring 71, waterpower excluder ring 64, mandrel 81, sprayer body 61 etc. reset.In folding process
Longer period of time is exposed without slot, the ring packing pressure chamber that sprayer body 61 and glass reinforced plastic cutting seam sieve tube 2 are formed also with center
Annular space chamber connection between tube body and glass reinforced plastic cutting seam sieve tube 2, discharges to pressure, to guarantee well-flushing tool and glass reinforced plastic slot
The safety of screen casing 2.
To improve cleaning effect, the corresponding design of waterpower packing formula spray head 6 has the first oscillation chamber 52 and the second oscillation chamber 53, leads to
It crosses oscillation chamber and generates pressure pulse raising jet cleaning effect.Subsequently through the amplification that builds the pressure of waterpower packing formula spray head 6, then spray
Out, so that injection well washing effect is further enhanced.
The coal bed gas well pumping and washing process of glass reinforced plastic screen casing was carried out using above-mentioned coal bed gas well-flushing tool, specific steps are such as
Under:
(1) by the horizontal segment of tool tripping in engineering water horizontal well 91, high pressure flushing liquid is injected into well-flushing tool and is sprayed
Well-flushing.
(2) well-flushing tool is moved forward by certain speed, high-pressure fluid is by tube body successively through the first oscillation chamber 52, second
Vibrate chamber 53, liquid collecting hole 10 enters sprayer body 61；If radial nozzles face sieve tube slit, high-velocity fluid directly carries out wellbore
Cleaning；If the ring packing cavity pressure formed around radial nozzles without sieve tube slit, sprayer body 61 and glass reinforced plastic cutting seam sieve tube 2
It increasing, waterpower excluder ring 64 drives pressing sleeve 72 to move down, and has sieve tube slit exposing in folding process, then high-pressure fluid cleans the borehole wall,
Pressure release；After pressure release, under the effect of pressure spring 71, waterpower excluder ring 64 resets.
(3) step (2) are repeated, until 92 well head returning fluid of mining straight well is relatively clear, well-flushing is completed.
It takes or uses for reference prior art and can be realized in the part that do not addressed in aforesaid way.
Above-described embodiment simply to illustrate that the utility model technical thought and feature, the purpose is to allow technical staff's energy
The content and method of solution the utility model much of that simultaneously can smoothly be implemented, and the protection scope of the utility model is not intended to limit.It is all
Equivalent changes or modifications are made according to the essence of the content of the present invention, are all covered within the protection scope of the present utility model.
Claims (5)
1. a kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing, it is characterised in that: including washing pipe, fluidic oscillation nozzle, water
Power insulates formula spray head, pressure regulator and guide head；
The washing pipe is arranged in the center of glass reinforced plastic screen casing, and the first elastic righting is provided between washing pipe and glass reinforced plastic screen casing
Set, washing pipe include the tube body for conveying flushing fluid, and the first elastic supporting positive cover is fixed on tube body by baffle ring, one end of tube body
It is provided with box cupling, the other end of tube body is connect with fluidic oscillation nozzle；
The fluidic oscillation nozzle includes dress mouth body, and one end of dress mouth body is threadedly coupled with tube body, the other end setting of dress mouth body
There is connector, the inside of dress mouth body is disposed with the first oscillation chamber being connected between each other and the second oscillation chamber, the first oscillation chamber
It is connected to the inside of tube body；
The waterpower packing formula spray head is located at one end of fluidic oscillation nozzle, and it includes outside sprayer body and spray head that waterpower, which insulates formula spray head,
Body；
The guide head includes mandrel, and one end of mandrel and dress mouth body are inconsistent, and mandrel is connect with dress mouth body by connector, in core
The end of axis is provided centrally with liquid collecting hole, and liquid collecting hole is connected to the second oscillation chamber, and the sprayer body is arranged on mandrel, and spray head
Body is connected with liquid collecting hole, and the outside of sprayer body is arranged in the spray head ectosome, is provided between sprayer body and spray head ectosome
Waterpower excluder ring is additionally provided with first seal between spray head ectosome and mandrel；It is provided with to lead in the other end of mandrel and helps set,
Retaining ring is provided at the end end of mandrel；
Pressure regulator setting is helped between set in spray head ectosome and leading, and pressure regulator includes pressure spring, movable pressing sleeve and pressure
Spring adjusts cover, and activity pressure is set on one end of spray head ectosome, and is set on mandrel, and pressure spring adjusts cover and passes through bolt and mandrel
It is fixedly connected, the chamber being formed between cover and mandrel for accommodating movable pressing sleeve is adjusted in pressure spring, pressure spring is arranged in chamber
And it is connected between movable pressing sleeve and pressure spring adjusting cover.
2. a kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing according to claim 1, it is characterised in that: the pipe
Body is threadedly coupled with box cupling；Second seal is provided between the connector and mandrel；It is described lead help set and glass reinforced plastic screen casing it
Between be provided with the second elastic supporting positive cover.
3. a kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing according to claim 1, it is characterised in that: the spray
Head body includes radial nozzles perpendicular with mandrel direction of extension and several are laid in the lateral spray around radial nozzles
Mouth.
4. a kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing according to claim 1, it is characterised in that: the spray
Head ectosome is arranged two, and is symmetrically located in the two sides of the mandrel, and the corresponding sprayer body is also provided with two.
5. a kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing according to claim 2, it is characterised in that: described the
One sealing element and second seal are respectively provided with three, and are uniformly distributed respectively along the outer wall border of mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821199285.6U CN208633791U (en) | 2018-07-27 | 2018-07-27 | A kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821199285.6U CN208633791U (en) | 2018-07-27 | 2018-07-27 | A kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208633791U true CN208633791U (en) | 2019-03-22 |
Family
ID=65738460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821199285.6U Expired - Fee Related CN208633791U (en) | 2018-07-27 | 2018-07-27 | A kind of coal bed gas well well-flushing tool for crossing glass reinforced plastic screen casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208633791U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798567A (en) * | 2018-07-27 | 2018-11-13 | 中国石油大学(华东) | A kind of coal bed gas well well-flushing tool and method for crossing fiberglass screen casing |
-
2018
- 2018-07-27 CN CN201821199285.6U patent/CN208633791U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798567A (en) * | 2018-07-27 | 2018-11-13 | 中国石油大学(华东) | A kind of coal bed gas well well-flushing tool and method for crossing fiberglass screen casing |
| CN108798567B (en) * | 2018-07-27 | 2024-03-08 | 中国石油大学(华东) | Coal bed gas well flushing tool and method for passing through glass fiber reinforced plastic screen pipe |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190322 Termination date: 20190727 |
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| CF01 | Termination of patent right due to non-payment of annual fee |