CN208950554U - A kind of double precision self-cleaning sand-screening pipe - Google Patents
A kind of double precision self-cleaning sand-screening pipe Download PDFInfo
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- CN208950554U CN208950554U CN201821388242.2U CN201821388242U CN208950554U CN 208950554 U CN208950554 U CN 208950554U CN 201821388242 U CN201821388242 U CN 201821388242U CN 208950554 U CN208950554 U CN 208950554U
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- sieve
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Abstract
The utility model discloses a kind of double precision self-cleaning sand-screening pipes, including central tube, central tube opens up radial through-hole, and the central tube outer cover is equipped with the sieve of tubulose, the sieve is divided into high-precision sieve, low precision sieve, wherein low precision sieve is located at the inside of high-precision sieve.The high-precision sieve has uniformly densely covered small sieve pore, and the low precision sieve has uniformly densely covered big sieve pore, wherein the aperture of big sieve pore is greater than the aperture of small sieve pore.The utility model uses the sieve sand block layer of two kinds of different accuracies, outer layer sand block precision is high, internal layer sand block precision is low, be conducive to pass through internal layer sand block layer by the shale and Extra-fine sand of outer layer sand block layer, reach resistance arrange greatly it is small, the purpose of sand control extends sand control stable production period to ensure that the permeability of resin sand screen.
Description
Technical field
The utility model relates to poly- drive and the filtering sand apparatus of subsequent waterflooding oil reservoir, siltstone and fine sand reservoir, specifically
A kind of double precision self-cleaning sand-screening pipe.
Background technique
Sand screen integral strength is high, and strainability is good, its completion tubular column structure of wide adaptation range is simple, technical process letter
Just, it is play an important role in independent sieve tube completion.Conventional sand screen such as metal felt sand filtering tube, screen mesh type sand screen, precision is multiple
Sand screen etc. is closed, the features such as it is strong to all have sand control ability, easy construction, but with heavy crude reservoir, high shale content siltstone and fine sand reservoir
Exploitation, conventional sand screen is since its sand block precision is single, and self-cleaning property is poor after blocking, causes Liquid output after sand control low, high
It is short to produce stable production period.
CN105863580A discloses a kind of prefabrication type sand screen for having skeleton, and upper and lower interior wire-wrapped screen suit ring is fixed
At the both ends of interior wire-wrapped screen, upper and lower outer wire-wrapped screen suit ring is fixed on the both ends of outer wire-wrapped screen, and upper and lower spacer ring is placed
It is between two wire-wrapped screens suit ring and integrally welded, upper isolating ring, upper outer wire-wrapped screen suit ring, upper interior wire-wrapped screen suit
Ring, interior wire-wrapped screen, outer wire-wrapped screen, lower outer wire-wrapped screen suit ring, lower isolating ring, lower interior wire-wrapped screen suit ring are assembled into one
It is put into after body in filling mold, the casting resin sand into mold, wire-wrapped screen, the filter sand that outer wire-wrapped screen is skeleton within formation
Pipe, by central tube penetrate in interior wire-wrapped screen and with, it is upper and lower in wire-wrapped screen suit boxing be connected together, do not influence it is unobstructed
Property in the case where increase the intensity of sand screen, sand screen is not easily damaged and dispersion, and service life and resistance to pressure energy can be improved
Power greatly increases the validity period of sand proof well, has significant economic benefit.
Application number: 201720423154.0 disclose a kind of resin sand screen, including central tube, sand block body, the center
Radial liquid flow hole is opened up on pipe, the central tube outer cover is equipped with sand block body, and the sand block body includes protecting outside punching lateral flow type
Sheath, plastic bonding sand, the plastic bonding sand cover outside central tube in a tubular form, and the punching lateral flow type outer jointing jacket covers
Outside plastic bonding sand；It is provided with axial equally distributed stainless reinforcing rod on the plastic bonding sand and/or circumferencial direction is equal
The stainless reinforcing rod of even distribution.The sand block body further includes alloy sheath, is cased with alloy sheath outside the central tube, outside the alloy sheath
Wall is close to plastic bonding sand inner wall, forms annular space between the alloy sheath inner wall and center pipe outer wall.It is evenly equipped on the alloy sheath
Radial trapezoidal hole.The utility model had not only taken into account the abrasion-resistance and sand block precision of sand screen, but also can prevent sand screen from existing
The corrosion and damage of underground, so as to greatly extend poly- drive and subsequent waterflooding oil reservoir sand control life.
CN201620916506.1 discloses a kind of resin sand screen, is applicable not only to the common sand control of petroleum industry
Construction is particularly suitable for High angle sand control construction, such as: the construction of high shale content loose sand oil accumulation high angle hole sand control.This filter
Sandpipe includes revenue centre pipe and resin sand body, the tube body of revenue centre pipe is equipped with liquid flow hole, both ends be respectively box cupling and under
Connector.The tube wall of revenue centre pipe welds water conservancy diversion supporting rib, and resin sand body is fixedly arranged to the outside of revenue centre pipe, protects
Net is fixedly arranged at the outer wall of resin sand body.The intensity for improving sand screen and the defencive function during tripping in extend sand control week
Phase.Using the utility model sand control, it can effectively reduce the manufacturing cost and use cost of sand screen, solve high angle hole sand control
The problem of screen casing breakage has good using effect and economic benefit.
By retrieval, technological document disclosed above not can solve the technical issues of the utility model is can solve.
Utility model content
The purpose of this utility model is to provide a kind of double precision self-cleaning sand-screening pipes, using the sieve of two kinds of different accuracies
Sand block layer, outer layer sand block precision is high, and internal layer sand block precision is low, is conducive to smoothly lead to by the shale and Extra-fine sand of outer layer sand block layer
Internal layer sand block layer is crossed, reaches resistance and arranges small, the purpose of sand control greatly, to ensure that the permeability of resin sand screen, is extended anti-
Sand stable production period.
In order to achieve the above objectives, the utility model provides following technical scheme, a kind of double precision self-cleaning sand-screening pipe,
Including central tube, central tube opens up radial through-hole, and the central tube outer cover is equipped with the sieve of tubulose, and the sieve is divided into high-precision
Sieve, low precision sieve are spent, wherein low precision sieve is located at the inside of high-precision sieve.
Flow-guiding screen is set between the high-precision sieve, low precision sieve；Between the low precision sieve, central tube
It is set with flow-guiding screen.Flow-guiding screen opens up radial deflector hole.
The high-precision sieve has uniformly densely covered small sieve pore, and the low precision sieve has uniformly densely covered shaker screen
Hole, wherein the aperture of big sieve pore is greater than the aperture of small sieve pore.
The high-precision sieve outer cover is equipped with protective case, and protective case opens up radial passage.
High-precision sieve upper end, low precision sieve upper end, flow-guiding screen upper end, protection set upper side with upper baffle ring lower end
Face is connected and fixed, and high-precision sieve lower end, low precision sieve lower end, flow-guiding screen lower end, protective case lower end are and lower baffle ring
Upper surface is connected and fixed, and the upper baffle ring and lower baffle ring are fixed in center pipe outer wall.
The central tube upper and lower side opens up connection screw thread, central tube upper end connection coupling.
Compared to the prior art, the utility model has the following beneficial effects:
When stratum Extra-fine sand and aging polymer pass through sand screen, most of stratum Extra-fine sand and aging polymer barrier
In the lesser high-precision sieve of outer screen mesh, it is biggish that the Extra-fine sand partially passed through and aging polymer enter sieve mesh
When low precision sieve, it not will form bridge formation blocking, with fluid output, to ensure that the permeability of sand screen, extend sand control
Stable production period.
With the continuous expansion of the exploitation scales such as poly- drive and subsequent waterflooding oil reservoir, siltstone and fine sand reservoir, after extending sand control
Stable production period becomes more and more important.The double precision self-cleaning sand-screening pipe of the utility model design is keeping the same of its sand block performance
When, and can have certain self-cleaning action in long-time production process, the generation of blocking is prevented, to keep its Thief zone
Property, extend sand control stable production period, has a extensive future.
For double precision self-cleaning sand-screening pipe using the combination of screens mode of two kinds of different sand block precision, outer layer sand block precision is high,
Internal layer sand block precision is low, so that sand screen be made to have certain self-cleaning function, reduces the blocking of sand screen, after extending sand control
High yield and stable production period.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of double precision self-cleaning sand-screening pipe of the utility model.
In figure: box cupling 1, upper baffle ring 2, central tube 3, flow-guiding screen 4 and 5, low precision sieve 6, high-precision sieve 7, protective case
8, lower baffle ring 9.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, the utility model provides a kind of technical solution: a kind of double precision self-cleaning sand-screening pipe, including center
Pipe 3, central tube open up radial through-hole, and the central tube outer cover is equipped with the sieve of tubulose, and the sieve is divided into high-precision sieve
7, low precision sieve 6, wherein low precision sieve is located at the inside of high-precision sieve.
Flow-guiding screen 4 is set between the high-precision sieve, low precision sieve；Between the low precision sieve, central tube
Also it is set with flow-guiding screen 5.
The high-precision sieve 7 has uniformly densely covered small sieve pore, and the low precision sieve 6 has uniformly densely covered shaker screen
Hole, wherein the aperture of big sieve pore is greater than the aperture of small sieve pore.
The high-precision sieve outer cover is equipped with protective case 8, and protective case opens up radial passage.
High-precision sieve upper end, low precision sieve upper end, flow-guiding screen upper end, protection set upper side are and under upper baffle ring 2
End face is connected and fixed, and high-precision sieve lower end, low precision sieve lower end, flow-guiding screen lower end, protective case lower end are and lower block
9 upper surface of ring is connected and fixed, and the upper baffle ring and lower baffle ring are fixed in 3 outer wall of central tube.
3 upper and lower end of central tube opens up connection screw thread, central tube upper end connection coupling 1.
Box cupling 1 connects top tubing string, and 3 lower part of central tube has tubing round thread to connect lower part tubing string.It is successively wrapped up outside central tube 3
Flow-guiding screen 4, low precision sieve 6, flow-guiding screen 5 and high-precision sieve 7, protective case 8, all components pass through upper baffle ring 2 and lower baffle ring 8
Successively fix.When stratum Extra-fine sand and aging polymer pass through sand screen, most of stratum Extra-fine sand and the resistance of aging polymer
Gear in the lesser high-precision sieve 7 of outer screen mesh, the Extra-fine sand partially passed through and aging polymer enter sieve mesh compared with
When big low precision sieve 6, it not will form bridge formation blocking, with fluid output, to ensure that the permeability of sand screen, extend
Sand control stable production period.
With the continuous expansion of the exploitation scales such as poly- drive and subsequent waterflooding oil reservoir, siltstone and fine sand reservoir, after extending sand control
Stable production period becomes more and more important.The double precision self-cleaning sand-screening pipe of the utility model design is keeping the same of its sand block performance
When, and can have certain self-cleaning action in long-time production process, the generation of blocking is prevented, to keep its Thief zone
Property, extend sand control stable production period, has a extensive future.
For double precision self-cleaning sand-screening pipe using the combination of screens mode of two kinds of different sand block precision, outer layer sand block precision is high,
Internal layer sand block precision is low, so that sand screen be made to have certain self-cleaning function, reduces the blocking of sand screen, after extending sand control
High yield and stable production period.
The main implementation method of double precision self-cleaning sand-screening pipe:
(1) double precision sieve, water conservancy diversion are carried out according to data such as reservoir characteristics, fluid properties and reservoir sand partial size screen analysis results
The optimization designs such as net, outer jointing jacket, machine-shaping.
(2) with back-off packer in oil well pipe lower going-into-well, is above connect, self-cleaning sand-screening pipe length wants oil overlay perforation
Section；
(3) ground pump truck divides step to suppress, set packer and test sealing lattice after, rotate forward tubing string give up, complete self-cleaning
The construction of sand screen sand control.
In the description of the present invention, it should be understood that temporald eixis or positional relationship are based on the figure
Orientation or positional relationship is merely for convenience of description the utility model, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of double precision self-cleaning sand-screening pipe, including central tube, central tube opens up radial through-hole, suit outside the central tube
There is the sieve of tubulose, which is characterized in that the sieve is divided into high-precision sieve, low precision sieve, wherein low precision sieve is located at
The inside of high-precision sieve.
2. a kind of double precision self-cleaning sand-screening pipe according to claim 1, which is characterized in that the high-precision sieve, low
Flow-guiding screen is set between precision sieve；Flow-guiding screen is also set between the low precision sieve, central tube.
3. a kind of double precision self-cleaning sand-screening pipe according to claim 1 or 2, which is characterized in that the high-precision sieve
With uniformly densely covered small sieve pore, the low precision sieve has uniformly densely covered big sieve pore, wherein the aperture of big sieve pore is greater than
The aperture of small sieve pore.
4. a kind of double precision self-cleaning sand-screening pipe according to claim 3, which is characterized in that outside the high-precision sieve
It is set with protective case, protective case opens up radial passage.
5. a kind of double precision self-cleaning sand-screening pipe according to claim 4, which is characterized in that on the high-precision sieve
End, low precision sieve upper end, flow-guiding screen upper end, protection set upper side are connected and fixed with upper baffle ring lower end surface, the high-precision sieve
End off the net, low precision sieve lower end, flow-guiding screen lower end, protective case lower end are connected and fixed with lower baffle ring upper surface, the upper gear
Ring and lower baffle ring are fixed in center pipe outer wall.
6. a kind of double precision self-cleaning sand-screening pipe according to claim 1 or 2, which is characterized in that above and below the central tube
End opens up connection screw thread, central tube upper end connection coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821388242.2U CN208950554U (en) | 2018-08-27 | 2018-08-27 | A kind of double precision self-cleaning sand-screening pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821388242.2U CN208950554U (en) | 2018-08-27 | 2018-08-27 | A kind of double precision self-cleaning sand-screening pipe |
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| Publication Number | Publication Date |
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| CN208950554U true CN208950554U (en) | 2019-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821388242.2U Active CN208950554U (en) | 2018-08-27 | 2018-08-27 | A kind of double precision self-cleaning sand-screening pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114075954A (en) * | 2020-08-20 | 2022-02-22 | 中国石油化工股份有限公司 | Prevent blockking up high infiltration sand pipe |
-
2018
- 2018-08-27 CN CN201821388242.2U patent/CN208950554U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114075954A (en) * | 2020-08-20 | 2022-02-22 | 中国石油化工股份有限公司 | Prevent blockking up high infiltration sand pipe |
| CN114075954B (en) * | 2020-08-20 | 2024-06-14 | 中国石油化工股份有限公司 | Anti-blocking Gao Shenlv sand pipe |
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