CN205823259U - A kind of gas injection tube column structure of well perforation holes compaction band permeability of improving the standard - Google Patents
A kind of gas injection tube column structure of well perforation holes compaction band permeability of improving the standard Download PDFInfo
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- CN205823259U CN205823259U CN201620807755.7U CN201620807755U CN205823259U CN 205823259 U CN205823259 U CN 205823259U CN 201620807755 U CN201620807755 U CN 201620807755U CN 205823259 U CN205823259 U CN 205823259U
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- pressure
- reduction
- column structure
- safety
- gas injection
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Abstract
This utility model provides the gas injection tube column structure of a kind of well perforation holes compaction band permeability of improving the standard, it mainly by oil pipe, safety joint, safety is given up, rigid centralizer, reduction of blood pressure in high-speed device, packer, reduction of blood pressure in high-speed device, constant pressure valve, righting-oriented device are sequentially connected with and form, described oil pipe, safety joint, safety is given up, connected mode between constant pressure valve and righting-oriented device is screwed connection, described reduction of blood pressure in high-speed device is the pipe nipple having through hole on tube wall, this pipe nipple is provided with pressure control thin film, and through hole is by pressure control diaphragm seal.The near wellbore zone reservoir pollution that horizontal well perforation completion of can removing this utility model is caused, recovers compaction band permeability, reduces the injury caused reservoir due to perforation compaction.
Description
Technical field
This utility model relates to oil-gas field development field, particularly to one improve the standard well perforation holes compaction band infiltration
The gas injection tube column structure of rate.
Background technology
Along with conventional gas and oil resource reserve constantly reduces, the exploitation of unconventional petroleum resources gradually comes into one's own, and level
Well technology is the guardian technique of exploitation unconventional petroleum resources.Horizontal well has bigger drainage area, and well control reserves are big, single
Well production is high.But due to the compaction of perforating bullet during perforation completion so that around borehole, nearly well reservoir exists compaction band, stream
Need when body is by compaction band to overcome great filtrational resistance, limit horizontal capacity of well.Improve it is proposed that a kind of
The gas injection tube column structure of horizontal well perforation borehole compaction band permeability, can be loosened near wellbore zone reservoir by this tubular column structure, carry
High permeability, reduces fluid flow resistance.
Utility model content
This utility model provides the gas injection tube column structure of a kind of well perforation holes compaction band permeability of improving the standard, by this
Tubular column structure can improve compaction band permeability around borehole, reduces fluid flow resistance, discharges Oil/gas Well production capacity.
In order to achieve the above object, the technical solution adopted in the utility model is:
The gas injection tube column structure of a kind of well perforation holes compaction band permeability of improving the standard, described tubular column structure is mainly by oil
Pipe, safety joint, safety give up, rigid centralizer, reduction of blood pressure in high-speed device, packer, reduction of blood pressure in high-speed device, constant pressure valve, guiding
Centralizer is sequentially connected with composition.This tubular column structure is capable of near shaft bottom and borehole pressurizeing and the fast prompt drop in shaft bottom in blowhole
Pressure, improves compaction band permeability around borehole.
Wherein, described coiled tubing, safety joint, safety give up, connection between constant pressure valve, screen casing and righting-oriented device
Mode is screwed connection.
Wherein, described reduction of blood pressure in high-speed device is the pipe nipple having through hole on tube wall, and this pipe nipple is provided with pressure control thin film, described
Through hole is by pressure control diaphragm seal, and this pressure control thin film pressurized rear moment to a certain extent ruptures, and this big I of thin film pressurized sets.
Further, pressurization and the shaft bottom reduction of blood pressure in high-speed of described net horizontal section reservoir is achieved in that
(1) closing oil jacket annular space, gas injection of pressurizeing in tubing string, in making tubing string due to constant pressure valve effect, constant pressure valve two ends produce
Pressure reduction, sets at this differential pressure action lower packet, closes perforated interval and oil jacket annular space, fixed solution plugging post.Persistent pressure is noted
Gas, it is achieved net horizontal section and the pressurization of near wellbore zone reservoir.
(2) pressure differential is formed in emptying oil jacket annular space, oil pipe column and between annular space, when this pressure differential is more than on packer
In the reduction of blood pressure in high-speed device of side during the pressure-bearing value of pressure control thin film, pressure control film breaks, connects by through hole with oil jacket annular space in tubing string,
Gases at high pressure are discharged to ground through annular space, it is achieved in tubing string, pressure reduces rapidly.
(3) oil overpressure reduce, constant pressure valve close, in horizontal well perforation section and tubing string between formed pressure differential,
This pressure differential more than when in reduction of blood pressure in high-speed device below packer, pressure control thin film sets pressure-bearing value, pressure control film breaks, gas from
In below packer, the through hole of reduction of blood pressure in high-speed device enters tubing string, then the through hole of reduction of blood pressure in high-speed device spills into above packer
Annular space, and then it is discharged to ground, it is achieved shaft bottom reduction of blood pressure in high-speed.
This utility model provides the gas injection tube column structure of a kind of well perforation holes compaction band permeability of improving the standard, this tubing string
Structure by oil pipe, safety joint, safety give up, rigid centralizer, reduction of blood pressure in high-speed device, packer, reduction of blood pressure in high-speed device, level pressure
Valve, righting-oriented device are sequentially connected with composition.First pass through running and pulling device and tubing string is transferred to appointment position, down-hole, close oil jacket ring
Shape space, injects gases at high pressure from well mouth oil pipe, and gases at high pressure enter net horizontal section along tubing string, make oil pipe decided at the higher level but not officially announced by constant pressure valve
Pressure valve two ends form certain pressure reduction, and packer sets under this differential pressure action, packing horizontal well perforation section and oil sets annular space,
Realize shaft bottom and blowhole pressurization near horizontal perforated interval.Persistently inject gases at high pressure, quick by the upper and lower two ends of packer
Dropping equipment, it is achieved shaft bottom and the rapid reduction of blowhole pressure, compaction band around loose borehole near perforated interval, improves near
Well area permeability, discharges oil gas capacity of well.
Accompanying drawing illustrates:
The following drawings is only intended to schematically illustrate this utility model and explain, does not limit model of the present utility model
Enclose, wherein:
Fig. 1: gas injection tube column string schematic diagram
Fig. 2: compaction band schematic diagram
Detailed description of the invention
This utility model provides the gas injection tube column structure of a kind of well perforation holes compaction band permeability of improving the standard, this tubing string
Structure is mainly given up 5 by oil pipe 1, safety joint 4, safety, rigid centralizer 6, reduction of blood pressure in high-speed device 7, packer 8, fast prompt drop
Pressure device 9, constant pressure valve 10, righting-oriented device 11 are sequentially connected with composition.Wherein, reduction of blood pressure in high-speed device 7 and 9 is logical for having on tube wall
The pipe nipple in hole, this pipe nipple is provided with pressure control thin film, and the pressure-bearing big I pressing power of pressure control thin film requires to set.
This utility model is implemented, and first passes through running and pulling device and tubing string is transferred to appointment position, down-hole, rigidity
During centralizer 6 and righting-oriented device 11 ensure to enter under oil pipe, reduce the eccentric wear of oil pipe 1 and sleeve pipe.Close oil jacket annular empty
Between 2, from well mouth oil pipe inject gases at high pressure 3, gases at high pressure 3 along tubing string enter net horizontal section, make oil pipe decided at the higher level but not officially announced by constant pressure valve 9
Pressure valve 9 two ends form certain pressure reduction, and packer 8 sets under this differential pressure action, and packing horizontal well perforation section is empty with oil jacket annular
Between 2, it is achieved near horizontal perforated interval, shaft bottom 12, compaction band 13 and blowhole 14 are pressurizeed.Persistently inject gases at high pressure 3, in pressure
Under the effect of difference, gas 3 penetrates further into compaction band 13 and blowhole 14 around borehole, increases near wellbore zone reservoir pore space pressure
Power；Then emptying oil jacket annular space 2, continues to inject gases at high pressure 3, when the pressure in tubing string is more than pressure control on reduction of blood pressure in high-speed device 3
During the pressure-bearing value that thin film 7 sets, pressure control film breaks, oil pipe 1 connects with oil jacket annular space 10, and in oil pipe 1, gas 3 is through tube wall through hole
Quickly escaping into oil jacket annular space 10, it is achieved in tubing string, pressure reduces rapidly, well head stops injecting gases at high pressure 3 simultaneously.Due to fixed
Pressure valve 10 outlet pressures is more than inlet port pressure, there is reverse pressure differential, and constant pressure valve 10 cuts out；Under in oil pipe 1, pressure continues
Fall, when reduction of blood pressure in high-speed device 9 both sides pressure reduction is more than pressure control thin film ability to bear, pressure control film breaks, perforated interval is with oil pipe 1 even
Logical, compaction band 13 and blowhole 14 mesohigh gas 3 spill into rapidly oil pipe 1, simultaneously gases at high pressure from reduction of blood pressure in high-speed device 9
3 enter into oil jacket annular space 2 through reduction of blood pressure in high-speed device 7 again, and then discharge ground.After pressure control thin film 9 ruptures, high in packing perforated interval
Calming the anger body 13 decompressional expansion, borehole 12 pressure drop low velocity, much larger than pressure drop rate in compaction band 13 and blowhole 14, makes rock
Stone hole 14 and borehole 12 produce pressure differential deltap P=P1-P2, compaction band 13 Lycopodium chinense Christ dispersion under this pressure reduction impetus, and by ground
Loose rock residue is discharged borehole by layer flowing in pit shaft, and hole is dredged, compaction band 13 resume permeability.Construction
After completing, upper lifting pipe post, packer 8 unseals automatically.During upper lifting pipe post, as tubing string meet card cannot on carry, can be by under tubing string
To horizontal well toe-end, given up by safety and 5 oil pipe 1 is separated with lower section tubing string string, it is ensured that horizontal well can be normally carried out producing.
The foregoing is only better embodiment of the present utility model, protection domain of the present utility model is not with above-mentioned reality
The mode of executing is limited, as long as those of ordinary skill in the art are according to the equivalent modifications disclosed in this utility model or change, all should receive
Enter in the protection domain described in claim.
Claims (3)
1. a gas injection tube column structure for well perforation holes compaction band permeability of improving the standard, it mainly by oil pipe, safety joint,
Safety is given up, rigid centralizer, reduction of blood pressure in high-speed device, packer, reduction of blood pressure in high-speed device, constant pressure valve, righting-oriented device connect successively
Connect composition.
The gas injection tube column structure of a kind of well perforation holes compaction band permeability of improving the standard, it is special
Levying and be, described oil pipe, safety joint, safety is given up, connected mode between constant pressure valve and righting-oriented device is screw thread even
Connect.
The gas injection tube column structure of a kind of well perforation holes compaction band permeability of improving the standard, it is special
Levying and be, described packer sets under certain pressure reduction, and upper lifting pipe post can unseal automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620807755.7U CN205823259U (en) | 2016-07-29 | 2016-07-29 | A kind of gas injection tube column structure of well perforation holes compaction band permeability of improving the standard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620807755.7U CN205823259U (en) | 2016-07-29 | 2016-07-29 | A kind of gas injection tube column structure of well perforation holes compaction band permeability of improving the standard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205823259U true CN205823259U (en) | 2016-12-21 |
Family
ID=57557487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620807755.7U Expired - Fee Related CN205823259U (en) | 2016-07-29 | 2016-07-29 | A kind of gas injection tube column structure of well perforation holes compaction band permeability of improving the standard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205823259U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104776A (en) * | 2017-12-12 | 2018-06-01 | 大连理工大学 | A kind of water erosion method exploiting ocean natural gas hydrates device of combination decompression |
| CN112664167A (en) * | 2019-10-15 | 2021-04-16 | 中国石油天然气股份有限公司 | Pore filter valve, quantitative gas injection pipe, device and stable gas injection method for horizontal well |
-
2016
- 2016-07-29 CN CN201620807755.7U patent/CN205823259U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104776A (en) * | 2017-12-12 | 2018-06-01 | 大连理工大学 | A kind of water erosion method exploiting ocean natural gas hydrates device of combination decompression |
| CN112664167A (en) * | 2019-10-15 | 2021-04-16 | 中国石油天然气股份有限公司 | Pore filter valve, quantitative gas injection pipe, device and stable gas injection method for horizontal well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161221 Termination date: 20170729 |