CN103573227A - Sand filtering pipe - Google Patents
Sand filtering pipe Download PDFInfo
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- CN103573227A CN103573227A CN201310558329.5A CN201310558329A CN103573227A CN 103573227 A CN103573227 A CN 103573227A CN 201310558329 A CN201310558329 A CN 201310558329A CN 103573227 A CN103573227 A CN 103573227A
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- sand
- pipe
- anemostat
- filtering
- protection tube
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Abstract
The invention discloses a sand filtering pipe. The sand filtering pipe comprises a center pipe and a protection pipe, wherein the center pipe penetrates through the protection pipe, and the center pipe and the protection pipe are coaxial. The sand filtering pipe further comprises two layers of diffusion pipes arranged between the center pipe and the protection pipe, quartz sand is arranged between the two layers of diffusion pipes, filtering holes are formed in all the center pipe, the protection pipe and the diffusion pipes, and the diameters of the filtering holes in the diffusion pipes are smaller than the diameter of the quartz sand. The mesh number of the filtering holes in the center pipe, the mesh number of the filtering holes in the diffusion pipes and the mesh number of the filtering holes in the protection pipe decrease gradually, impact on the diffusion pipes caused by crude oil can be effectively controlled, and abrasion to the sand filtering pipe is reduced; under the primary filtering action of the protection pipe, sand with larger diameter is blocked outside the sand filtering pipe; the diffusion pipes has high elasticity, so that sand with smaller diameter can pass gaps when the sand is driven to a certain extent, the filtering holes are prevented from being blocked, and the filtering efficiency is improved.
Description
Technical field
The present invention relates to a kind of sand screen, specifically refer to a kind of sand screen.
Background technology
Along with the continuity of oil-gas field development phase, oil-gas Layer pressure declines naturally, the load of oil-gas Layer sand body bearing capacity increases gradually, cause the balancing of stresses between sand grains to destroy, cementing destruction is caused formation sand production, in addition, stratum water filling may make the clay swell in oil-gas Layer disperse, and what have also can decline along with formation fluid migration makes oil-gas Layer bond.In waterflooding extraction, in order to keep output to improve, adopt liquid measure, this will increase the flow velocity of formation fluid, and increasing fluid washes away and carrying capacity (fast quick effect) reservoir sand, and therefore, water filling likely causes formation sand production.In addition, the two-phase in stratum or Three-phase Flow state can increase the power of carrying to reservoir sand.The formation particle main component of carrying in gas stream is silica, hardness is very high, be the abrasive that a kind of destructiveness is very strong, can make the wearing and tearing of oil well pump valve seat and blow-by, valve ball spot corrosion, bar plug and pumping cylinder are pulled, ground valve is malfunctioning, the serious erosion of oil transfer pump impeller, thus be forced to close well operations, change or maintenance of equipment, cause production declining, cost to rise.
Therefore, current most oil-gas field development adopts mechanical sand control, by lower sand control pipe sand block, as the sand screen of slotted liner, wire-wrapped screen, cementation and formation, bilayer or multilayer sandpipe etc., this class anti-sand method is simple, but weak effect, the life-span is short, and reason is that the gap of sand control pipe or the thin reservoir sand that hole is easily entered pit shaft stop up.
Summary of the invention
The object of the present invention is to provide a kind of sand screen, improve the reliability of sand control, extend the application life of sand screen.
Object of the present invention is achieved through the following technical solutions:
A kind of sand screen; comprise central tube and protection tube; central tube runs through protection tube; central tube is coaxial with protection tube, also comprises the two-layer anemostat being arranged between described central tube and protection tube, between two-layer anemostat, is provided with quartz sand; described central tube, protection tube and anemostat all have filter opening; filter opening aperture on anemostat is less than the diameter of quartz sand, and on described central tube, anemostat and protection tube, the order number of filter opening reduces gradually, and the cross section of the filter opening on protection tube is inverted trapezoidal.Traditional mechanical sand control generally adopts wound form metal wool or inserted metal wool, and when meeting the viscous crude field of loose sand, the permeability of gravel is high, and sand controlling result is not obvious, and sand-proof pipe is easily impaired, and greatly reduce application life, the present invention adopts gravel to fill, the means that multilayer arranges, strengthen the filtration efficiency of sand screen, between protection tube and central tube, be provided with two-layer anemostat, between two-layer anemostat, be filled with quartz sand, central tube wherein, on anemostat and protection tube, the order number of filter opening reduces gradually, can effectively control the impact of oil well Crude Oil to anemostat, reduce the wearing and tearing of sand screen, under the primary filter effect of protection tube, larger-diameter gravel is shielded in outside sand screen, anemostat has higher elasticity, can make gravel under certain driving, the gravel that diameter is less also can pass through gap, avoid filter opening to be blocked, improved the efficiency filtering.
Aperture on described central tube, anemostat and protection tube increases gradually.The aperture of different sizes can make crude oil be smoothly through central tube, anemostat and protection tube; on protection tube, larger aperture can make crude oil penetrate into more easily in oil well; pressure in the time of can relatively reducing crude oil infiltration; can avoid gravel to enter oil well under larger pressure simultaneously; thereby the friction of minimizing and equipment, reduces wearing and tearing, improves its application life; the gravel of different-diameter size is filtered respectively step by step, contributes to improve filtration efficiency.
The material of described anemostat is polyurethane.Polyurethane anemostat, there is abrasion resistance and impact resistance, can guarantee that sand screen keeps the stability of its work under long high-pressure osmosis, and polyurethane also has good elasticity, under certain driving, can make the gravel that diameter is less pass through gap, make it to have the effect of self-cleaning, greatly reduce the blocked possibility of anemostat.
The external diameter of described protection tube is at 75 ~ 150 ㎜.External diameter in the scope of 75 ~ 150 ㎜, applicable various in large small-sized Oil/gas Well, improved the practicality of sand screen.
The diameter of described quartz sand is 0.07 ~ 0.3 ㎜.
The present invention compared with prior art, has following advantage and beneficial effect:
1, a kind of sand screen of the present invention, comprise central tube and protection tube, central tube runs through protection tube, central tube is coaxial with protection tube, also comprise the two-layer anemostat being arranged between described central tube and protection tube, in anemostat, be provided with quartz sand, described central tube, protection tube and anemostat all have filter opening, filter opening aperture on anemostat is less than the diameter of quartz sand, on described central tube, anemostat and protection tube, the order number of filter opening reduces gradually, and the cross section of the filter opening on protection tube is inverted trapezoidal; Wherein on central tube, anemostat and protection tube, the order number of filter opening reduces gradually, can effectively control the impact of oil well Crude Oil to anemostat, reduce the wearing and tearing of sand screen, under the primary filter effect of protection tube, larger-diameter gravel is shielded in outside sand screen, anemostat has higher elasticity, can make gravel under certain driving, the gravel that diameter is less also can pass through gap, avoids filter opening to be blocked, and has improved the efficiency filtering;
2, a kind of sand screen of the present invention, the aperture of different sizes can make crude oil be smoothly through central tube, anemostat and protection tube, on protection tube, larger aperture can make crude oil penetrate into more easily in oil well, pressure in the time of can relatively reducing crude oil infiltration, can avoid gravel to enter oil well under larger pressure simultaneously, thereby the friction of minimizing and equipment, reduces wearing and tearing, improves its application life;
3, a kind of sand screen of the present invention, polyurethane anemostat, there is abrasion resistance and impact resistance, can guarantee that sand screen keeps the stability of its work under long high-pressure osmosis, and polyurethane also has good elasticity, under certain driving, can make the gravel that diameter is less pass through gap, make it to have the effect of self-cleaning, greatly reduce the blocked possibility of anemostat.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present invention, forms the application's a part, does not form the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the sectional view of Fig. 1;
Mark and corresponding component title in accompanying drawing:
1-protection tube, 2-anemostat, 3-central tube, 4-filter opening, 5-quartz sand.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and exemplary embodiment of the present invention and explanation thereof are only for explaining the present invention, not as a limitation of the invention.
Embodiment
As depicted in figs. 1 and 2, a kind of sand screen of the present invention, comprise central tube 3 and protection tube 1, central tube 3 runs through protection tube 1, central tube 3 is coaxial with protection tube 1, also comprise the two-layer anemostat 2 being arranged between described central tube 3 and protection tube 1, between two-layer anemostat 2, be provided with quartz sand 5, described central tube 3, protection tube 1 and anemostat 2 all have filter opening 4, filter opening 4 apertures on anemostat 2 are less than the diameter of quartz sand 5, described central tube 3, on anemostat 2 and protection tube 1, the order number of filter opening 4 reduces gradually, and the cross section of the filter opening on protection tube 14 is inverted trapezoidal, filter opening 4 apertures on described central tube 3, anemostat 2 and protection tube 1 increase gradually.The aperture of different sizes can make crude oil be smoothly through central tube 3, anemostat 2 and protection tube 1; on protection tube 1, larger aperture can make crude oil penetrate into more easily in oil well; pressure in the time of can relatively reducing crude oil infiltration; can avoid gravel to enter oil well under larger pressure simultaneously; thereby the friction of minimizing and equipment, reduces wearing and tearing, improves its application life; the gravel of different-diameter size is filtered respectively step by step, contributes to improve filtration efficiency.
Traditional mechanical sand control generally adopts wound form metal wool or inserted metal wool, and when meeting the viscous crude field of loose sand, the permeability of gravel is high, and sand controlling result is not obvious, and sand-proof pipe is easily impaired, and greatly reduce application life, the present invention adopts gravel to fill, the means that multilayer arranges, strengthen the filtration efficiency of sand screen, between protection tube 1 and central tube 3, be provided with two-layer anemostat 2, between two-layer anemostat 2, be filled with quartz sand 5, wherein central tube 3, on anemostat 2 and protection tube 1, the order number of filter opening 4 reduces gradually, can effectively control the impact of oil well Crude Oil to anemostat 2, reduce the wearing and tearing of sand screen, under the primary filter effect of protection tube 1, larger-diameter gravel is shielded in outside sand screen, anemostat 2 has higher elasticity, can make gravel under certain driving, the gravel that diameter is less also can pass through gap, avoid filter opening 4 to be blocked, improved the efficiency filtering.
The above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a sand screen, it is characterized in that: comprise central tube (3) and protection tube (1), central tube (3) runs through protection tube (1), central tube (3) is coaxial with protection tube (1), also comprise the two-layer anemostat (2) being arranged between described central tube (3) and protection tube (1), between two-layer anemostat (2), be provided with quartz sand (5), described central tube (3), protection tube (1) and anemostat (2) all have filter opening (4), filter opening (4) aperture on anemostat (2) is less than the diameter of quartz sand (5), described central tube (3), the order number of the upper filter opening (4) of anemostat (2) and protection tube (1) reduces gradually, and the cross section of the filter opening (4) on protection tube (1) is inverted trapezoidal.
2. a kind of sand screen according to claim 1, is characterized in that: the aperture on described central tube (3), anemostat (2) and protection tube (1) increases gradually.
3. a kind of sand screen according to claim 1, is characterized in that: the material of described anemostat (2) is polyurethane.
4. a kind of sand screen according to claim 2, is characterized in that: the external diameter of described protection tube (1) is at 75 ~ 150 ㎜.
5. according to a kind of sand screen described in claim 1 ~ 4 any one, it is characterized in that: the diameter of described quartz sand (5) is 0.07 ~ 0.3 ㎜.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558329.5A CN103573227A (en) | 2013-11-12 | 2013-11-12 | Sand filtering pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558329.5A CN103573227A (en) | 2013-11-12 | 2013-11-12 | Sand filtering pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103573227A true CN103573227A (en) | 2014-02-12 |
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ID=50045869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310558329.5A Pending CN103573227A (en) | 2013-11-12 | 2013-11-12 | Sand filtering pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103573227A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219615A (en) * | 2019-05-31 | 2019-09-10 | 山东科技大学 | A kind of coal seam pulsed infusion borehole sealing device and method for sealing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2178783Y (en) * | 1993-12-23 | 1994-10-05 | 吕从容 | Wrapped sand filtering pipe with metal filter cover |
| CN2304696Y (en) * | 1997-08-21 | 1999-01-20 | 辽河石油勘探局供水公司 | Cage-shape sandproof screening pipe for water well |
| WO2004099560A1 (en) * | 2003-05-07 | 2004-11-18 | Bp Exploration Operating Company Limited | Erosion resistant sand screen |
| CN102549234A (en) * | 2009-09-25 | 2012-07-04 | 贝克休斯公司 | A system and apparatus for well screening including a foam layer |
| CN202325435U (en) * | 2011-08-23 | 2012-07-11 | 东营市东营区和光科技有限责任公司 | Composite sand prevention screen with two wire-wrapping layers, packing sand and a stainless steel filter net layer |
| CN203559885U (en) * | 2013-11-12 | 2014-04-23 | 成都科盛石油科技有限公司 | Petroleum sand filter tube |
-
2013
- 2013-11-12 CN CN201310558329.5A patent/CN103573227A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2178783Y (en) * | 1993-12-23 | 1994-10-05 | 吕从容 | Wrapped sand filtering pipe with metal filter cover |
| CN2304696Y (en) * | 1997-08-21 | 1999-01-20 | 辽河石油勘探局供水公司 | Cage-shape sandproof screening pipe for water well |
| WO2004099560A1 (en) * | 2003-05-07 | 2004-11-18 | Bp Exploration Operating Company Limited | Erosion resistant sand screen |
| CN102549234A (en) * | 2009-09-25 | 2012-07-04 | 贝克休斯公司 | A system and apparatus for well screening including a foam layer |
| CN202325435U (en) * | 2011-08-23 | 2012-07-11 | 东营市东营区和光科技有限责任公司 | Composite sand prevention screen with two wire-wrapping layers, packing sand and a stainless steel filter net layer |
| CN203559885U (en) * | 2013-11-12 | 2014-04-23 | 成都科盛石油科技有限公司 | Petroleum sand filter tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219615A (en) * | 2019-05-31 | 2019-09-10 | 山东科技大学 | A kind of coal seam pulsed infusion borehole sealing device and method for sealing |
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Application publication date: 20140212 |