CN205936547U - Arc-shaped composite filter element of sand control screen pipe - Google Patents
Arc-shaped composite filter element of sand control screen pipe Download PDFInfo
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- CN205936547U CN205936547U CN201620887985.9U CN201620887985U CN205936547U CN 205936547 U CN205936547 U CN 205936547U CN 201620887985 U CN201620887985 U CN 201620887985U CN 205936547 U CN205936547 U CN 205936547U
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- arc
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- control screen
- circle
- supporting part
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- 239000004576 sand Substances 0.000 title claims abstract description 54
- 239000002131 composite material Substances 0.000 title abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 95
- 239000011521 glass Substances 0.000 claims description 21
- 238000012216 screening Methods 0.000 claims description 21
- 238000009826 distribution Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000009288 screen filtration Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 net Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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- Filtering Materials (AREA)
Abstract
The utility model provides a sand control screen pipe arc composite filter tank filters piece, include: the supporting part is a cylindrical cavity with one unsealed end, and the bottom surface of the sealed end of the cylindrical cavity is provided with at least one first through hole; the filtering part is a cylinder with at least one filtering groove, the filtering groove comprises a vertical groove and an expansion groove which are mutually communicated from the upper bottom surface to the lower bottom surface of the cylinder, the vertical groove forms an upper arc shape which is concentric with the upper bottom surface on the upper bottom surface, the expansion groove forms a lower arc shape which is concentric with the lower bottom surface on the lower bottom surface, and the first side wall of the expansion groove is positioned on the vertical extension surface of the first side wall of the vertical groove; the first side wall of the vertical groove and the first side wall of the expansion groove are vertical surfaces close to the central axis of the cylinder in the circumferential direction; the filtering part is accommodated in the supporting part and is clamped with the inner wall of the supporting part, and the height of the filtering part is lower than that of the supporting part. The filter is not easy to block and has high external extrusion resistance.
Description
Technical field
This utility model is related to a kind of Oil/gas Well downhole tool, more particularly, to a kind of sand control screen arc combined filtration groove mistake
Filter part, belongs to oil-gas mining technical field.
Background technology
During oil gas well mining, generally existing formation sand production phenomenon.Shake out easily cause oil-gas Layer sand bury, flow string
And equipment attrition, lead to the Oil/gas Well underproduction.Sand control measure is taken to be the Main Means solving the problems, such as sand production of oil-gas wells, and sand screen
Pipe is most important in sand control measure, most widely used instrument.The species of screen casing is various, wherein, Integral sand-proof screen pipe due to
Have the advantages that latus rectum is big, be easy to underground work, structure is simple, low manufacture cost, being widely used.Monoblock type sand screen
Pipe is to drill through through hole on base tube, sand control filtration members is embedded in the through hole of base tube, forms monoblock type monolayer tubular construction, using anti-
Sand filtration members are realized filtering the purpose of sand block.
At present, sand control filtration members mainly have two kinds of structures：Circular configuration and rectangle structure.Circular configuration filtration members require
Base tube drills through manhole, so that filtration members are embedded on base tube, circular configuration filtration members mainly adopt metal simultaneously
The filtering materials such as net, metal wool, sintering metal powder process, Patent No. CN2646381Y, CN2816350Y,
CN200949454Y, CN2937472Y, CN202117642U describe the structure of such filtration members.This kind of filtering material is due to mistake
Filter opening road complex structure, is susceptible to block in the high Oil/gas Well of shale content, the service life of impact screen casing.And rectangle
Structured filter part is formed by several bar shaped filter Combined machining, and Patent No. CN201818289U describes such filtration members
Structure.It is provided with bar shaped between the combination of bar shaped filter and filters seam, realize filtering the effect of sand block using filtering seam.This rectangular
Shape filtration is less likely to occur to block in the high Oil/gas Well of shale content.But, because such filtration members is tied for rectangle
Structure is it is desirable to mill out rectangular channel on base tube, so that such filtration members is mounted on base tube.When screen casing is subject to outer crowded stress,
Rectangular channel easily produces stress concentration, and occurs extruding to destroy.
Utility model content
For drawbacks described above, this utility model provides a kind of sand control screen arc combined filtration groove filtration members, this filtration members
Not only good filtration effect is not susceptible to block, and is not easy to be extruded destruction when screen casing is subject to outer crowded stress.
This utility model provides a kind of sand control screen arc combined filtration groove filtration members, including：
Supporting part, described supporting part is the untight cylindrical cavity in one end, on the bottom surface of the blind end of described cylindrical cavity
It is provided with least one first through hole；
Filter house, described filter house is the cylinder with least one filter tank, and described filter tank is included by described circle
Vertical slots and expansion slot that the upper bottom surface of cylinder to bottom surface interconnects, described vertical slots described upper bottom surface define with
The upper circular arc of the concyclic heart in bottom surface, described expansion slot defines the lower circular arc with the concyclic heart of bottom surface, institute in described bottom surface
In the vertical elongated surfaces of the first side wall that the first side wall stating expansion slot is in described vertical slots；The first side wall of described vertical slots
It is the vertical plane near described cylinder axis on circumferencial direction with the first side wall of expansion slot；
Described filter house is placed in described supporting part and is engaged with the inwall of described supporting part, the height of described filter house
Degree is less than the height of described supporting part.
In one embodiment, inner support earial drainage piece and outer screening glass are also included；Described inner support earial drainage piece and outer protection
Piece is that diameter is circular with described cylinder diameter identical, and described inner support earial drainage piece is provided with least one second through hole,
It is provided with least one third through-hole on described outer screening glass；
Described inner support earial drainage piece is folded between described supporting part and described filter house, and described outer screening glass is arranged on institute
State the top of filter house.
In one embodiment, in the vertical direction, the height of described vertical slots with the ratio of the height of described expansion slot is
1：2.
In one embodiment, the height of described supporting part is 6-8mm.
In one embodiment, when described filter tank is more than one, described upper circular arc is along the difference of described upper bottom surface
Circle distribution；Wherein, the upper circular arc on same circumference is symmetrical with respect to the center of circle of described upper bottom surface.
In one embodiment, described upper circular arc include near the described upper bottom surface center of circle first on arc-shaped edges and away from
Arc-shaped edges on the second of the described upper bottom surface center of circle；Any point on arc-shaped edges on described second is to distance between the described upper bottom surface center of circle
And the difference of any point on arc-shaped edges on described first to distance between the described upper bottom surface center of circle is constant.
In one embodiment, on described second any point on arc-shaped edges to distance and institute between the described upper bottom surface center of circle
The difference stating any point on arc-shaped edges on first to distance between the described upper bottom surface center of circle is 0.05-1mm.
In one embodiment, a diameter of 25mm of the bottom surface of the blind end of described cylindrical cavity.
In one embodiment, when described first through hole is more than one, described first through hole is in described cylindrical cavity
It is uniformly distributed on the bottom surface of blind end.
In one embodiment, when described second through hole and third through-hole are respectively greater than one, described second through hole with
It is uniformly distributed in petal-shaped centered on the center of circle of described inner support earial drainage piece, described third through-hole is with the center of circle of described outer screening glass
Centered on be uniformly distributed in petal-shaped.
Sand control screen arc combined filtration groove filtration members processing technique of the present utility model is simple, low manufacture cost, its circle
The structure of shape can improve the collapsoing strength of screen casing, and filter tank therein is the composite slot of outer narrow inner width, shale granule and
Fine silt will not stop after entering filter tank in filter tank, and filtration members therefore of the present utility model have " self-cleaning " function, no
Can block, long service life, be particularly suited for the exploitation of the high Oil/gas Well of shale content.
Brief description
Fig. 1 is the longitudinal profile structure schematic of sand control screen arc combined filtration groove filtration members of the present utility model；
Fig. 2 is the top view of this utility model sand control screen arc combined filtration groove filtration members filter house；
Fig. 3 is the another top view of this utility model sand control screen arc combined filtration groove filtration members filter house；
Fig. 4 is the front view of this utility model sand control screen arc combined filtration groove filtration members supporting part；
Fig. 5 is the top view of this utility model sand control screen arc combined filtration groove filtration members supporting part；
Fig. 6 is inner support earial drainage piece and outer screening glass in this utility model sand control screen arc combined filtration groove filtration members
Front view；
Fig. 7 is inner support earial drainage piece and outer screening glass in this utility model sand control screen arc combined filtration groove filtration members
Top view；
Fig. 8 is the interior mistake in filter house processing mode one in this utility model sand control screen arc combined filtration groove filtration members
The top view of filter ring.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, implement below in conjunction with this utility model
Accompanying drawing in example, is clearly and completely described the reality it is clear that described to the technical scheme in this utility model embodiment
Applying example is a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of not making creative work, broadly falls into this practicality new
The scope of type protection.
Fig. 1 is the longitudinal profile structure schematic of sand control screen arc combined filtration groove filtration members of the present utility model, Fig. 2
For the top view of this utility model sand control screen arc combined filtration groove filtration members filter house, Fig. 3 is this utility model sand screen
The another top view of pipe arc combined filtration groove filtration members filter house, refer to Fig. 1-3, and sand control screen of the present utility model filters
Part includes supporting part 1, and supporting part 1 is the untight cylindrical cavity in one end, and the bottom surface 11 of the blind end of cylindrical cavity is provided with
At least one first through hole 12；Filter house 2, filter house 2 is the cylinder with least one filter tank 20, and filter tank 20 includes
The vertical slots 21 being interconnected by cylindrical upper bottom surface to bottom surface and expansion slot 22, vertical slots 21 upper bottom surface define with
The upper circular arc 23 of the concyclic heart of upper bottom surface, expansion slot 22 defines the lower circular arc with the concyclic heart of bottom surface in bottom surface, expansion
The first side wall 221 of groove 22 is in the vertical elongated surfaces of the first side wall 211 of vertical slots 21；The first side wall of vertical slots 21
211 and expansion slot 22 the first side wall 221 be circumferencial direction near cylinder axis vertical plane；Filter house 2 is placed in
Engage in supporting part 1 and with the inwall of supporting part 1, the height of filter house 2 is less than the height of supporting part 1.
Specifically, critical piece of the present utility model is filter house 2, and this filter house 2 is to have the mistake running through bottom surface
The cylinder of filter pocket 20, and the mistake that this filter tank 20 is arc in the planar cross-sectional that cylindrical inside is not constant width
Filter pocket, this filter tank 20 in the vertical direction is composite slot, is constant the erecting of width from the direction of upper bottom surface to bottom surface
The connected component of the expansion slot 22 that straight trough 21 and width are gradually increased.The longitudinal profile in figure of Fig. 1 is it can be clearly seen that filter tank 20
Near cylinder top be vertical slots 21, two side walls of this vertical slots vertically downward, gradually, vertical slots 21 away from circle
The side wall of the heart is to the direction expansion away from the center of circle, so that the filter tank of close cylinder bottom gradually becomes expansion slot 22.
Supporting part 1 plays the effect carrying filter house 2, only little than the internal diameter of supporting part 1 0.1- of external diameter of filter house 2
0.5mm, after filter house 2 is therefore put into the cavity of supporting part 1, filter house 2 is difficult to come off from supporting part 1.
Specifically when using, this utility model filtration members can be embedded in and be there is the circle being matched with supporting part 1 external diameter
On the base tube in hole, become sand control screen.This sand control screen is fallen under Oil/gas Well, fluid first passes through mistake of the present utility model
Filter tank 20 on filter part enters inside screen casing, then flows out from the first through hole 12 of supporting part 1 bottom surface 11 and is plucked out of to ground,
And the grains of sand in fluid are then blocked in outside screen casing by filtration members, thus completing entirely to filter work.Wherein, this utility model pair
The material of filter house does not limit, and its material can be selected as the case may be, thus meeting the requirement of different operating modes.
The filter tank 20 of filter house 2 of the present utility model assumes the shape of outer narrow inner width, therefore shale granule and fine silt
Do not occur at after entering filter tank 20 to stop in filter tank 20 and block, and the sand control screen filtration members of circle can be divided
Concentrated stress suffered by scattered screen casing, it is to avoid the phenomenon that extruding destroys easily occurs after screen casing stress.
In order to further enhance filter effect, in the vertical direction, can be by the height of vertical slots 21 and expansion slot 22
The ratio of height is defined to 1：2, and the height of whole supporting part 1 is 6-8mm, and that is, the height of the untight cylindrical cavity in one end is
6-8mm.
Because this utility model does not limit the number of filter tank 20, therefore when the number of filter tank 20 is more than 1, in order to increase
Strong filter effect, further can be limited to the distribution mode of multiple filter tank 20, due to filter tank on the cylinder
Bottom surface be shaped as circular arc, the distribution mode of therefore above circular arc 23 specifically to introduce the distribution mode of filter tank 20.Tool
Body ground, when the number of filter tank 20 is more than 1, multiple upper circular arcs 23 can be divided with the center of circle of cylinder upper bottom surface as the center of circle
Cloth on the different circumference in this center of circle, and be distributed on same circumference not ibid circular arc 23 be mutually symmetrical, herein
Symmetrically comprise two meanings, first, ibid circular arc 23 is not equivalently-sized；Second, between two adjacent upper circular arcs 23
Distance be equal to each other, that is, the distance of terminal starting point of circular arc on second of circular arc is equal to circular arc on second on first
Terminal starting point of circular arc on the 3rd distance, wherein, circular arc on first, circular arc on second, circular arc on the 3rd
Sequentially adjacent.In addition, this utility model does not limit the number of the upper circular arc 23 on same circumference, it is desirable that can be uniformly distributed
In whole circumference, if the number of the upper circular arc 23 on same circumference is few, can suitably increase the arc length of upper circular arc.Tool
Body ground, from Fig. 2,3, filter tank 20 is all uniformly distributed on the cylinder.
It should be noted that from Fig. 2 and Fig. 3, upper circular arc 23 includes circular arc on the first of the upper bottom surface center of circle
Side 231 and away from arc-shaped edges 232 on the second of the upper bottom surface center of circle；Any point on arc-shaped edges 232 on second is to the upper bottom surface center of circle
Between any point on arc-shaped edges 231 in distance and first to distance between the upper bottom surface center of circle difference constant, this difference is vertical slots
21 width diametrically, typically this difference being set in 0.05-1mm can meet filtering requirement, but this utility model is simultaneously
Do not limit this difference, specifically difference can determine it is also possible to according to user according to the distribution of real-time stratum fineness of sand and composition
Requirement be processed.
In addition, Fig. 4 is the front view of this utility model sand control screen arc combined filtration groove filtration members supporting part, Fig. 5 is
Top view for this utility model sand control screen arc combined filtration groove filtration members supporting part.Usually, the blind end of supporting part 1
Bottom surface 11 diameter, i.e. a diameter of 25mm of the bottom surface 11 of the blind end of cylindrical cavity 13, and when first through hole 12 be more than one
When individual, the bottom surface 11 of the blind end in cylindrical cavity 13 for the first through hole 12 is uniformly distributed.Wherein, first through hole 12 is preferably and justifies
Hole.
Further, refer to Fig. 1, sand control screen filtration members of the present utility model can also include inner support earial drainage piece 3
With outer screening glass 4；Inner support earial drainage piece 3 and outer screening glass 4 are that diameter is circular with the cylinder diameter identical of filter house 2, interior
Support and be provided with least one second through hole 31 in earial drainage blade 3, outer screening glass 4 is provided with least one third through-hole 41；
Inner support earial drainage piece 3 is folded between supporting part 1 and filter house 2, and outer screening glass 4 is arranged on the top of filter house 2.This inner support
Earial drainage piece 3 and outer screening glass 4 further enhancing the filter effect to the grains of sand for this utility model filtration members.
Fig. 6 is inner support earial drainage piece and outer screening glass in this utility model sand control screen arc combined filtration groove filtration members
Front view, Fig. 7 is inner support earial drainage piece and outer screening glass in this utility model sand control screen arc combined filtration groove filtration members
Top view is it is notable that inner support earial drainage piece 3 and outer screening glass 4 can be the same or different, as shown in Figure 6,7, interior
Support earial drainage piece 3 identical with outer screening glass 4.When the second through hole 31 and third through-hole 41 are respectively greater than one, the second through hole 31
It is uniformly distributed in petal-shaped centered on the center of circle of inner support earial drainage piece 3, centered on the center of circle of screening glass 4 beyond third through-hole 41
It is uniformly distributed in petal-shaped.Wherein, the second through hole 31 and third through-hole 41 are preferably circular hole.
Filter house processing of the present utility model is simple, introduces this utility model sand control screen below by way of two ways and filters
The concrete processing mode of filter house in part.
Processing mode one：Fig. 8 is filter house processing side in this utility model sand control screen arc combined filtration groove filtration members
The top view of the interior filtration ring in formula one, refer to Fig. 8.The top view of the filter house being processed by this processing mode one is schemes
Shown in 2.
Please also refer to Fig. 1, Fig. 2 and Fig. 8, filter house 2 is by outer filtration ring 24 (this outer filtration ring 24 with certain altitude
Outer wall be equivalent to the cylindrical outer wall of filter house 2) filter ring with 1～10 different having in certain altitude of diameter
25 suits are embedded to be combined, and wherein, outer filtration ring 24 and interior filtration ring 25 upper inside wall are to face directly, and bottom is inclined-plane, and
Interior filtration ring 25 outer wall arranges 2～8 support bars 26, so that forming the arc filter tank of equal in width between adjacent head ring
20.Filter tank 20 narrow lower width in the axial direction, and see on axial cross section, top is the vertical slots 21 of rectangle, and bottom is straight
The trapezoidal expansion slot in angle 22, thus constitute composite slot.Specifically, this filter house 2 is processed with stainless steel.
Processing mode two：The top view of the filter house being processed by this processing mode two is shown in Fig. 3.Refer to Fig. 3,
It is running through of circular arc 23 that filter house 2 can cut out several radially wide horizontal cross-sections on the cylinder using superlaser
On cylinder, the filter tank 20 of bottom surface processes, wherein, the concrete structure of filter tank 20 with filter tank 20 in mode one
Structure identical.
This utility model provides a kind of sand control screen circular filter element, and the processing technique of this filtration members is simple.It is manufactured into
This is low, and the filter tank of combined type can improve the anti-shale blocking ability of Integral sand-proof screen pipe, and circular outer tube can
Strengthen the collapse resistance of screen casing, be particularly suited for the exploitation of the high Oil/gas Well of shale content.
Finally it should be noted that：Various embodiments above is only in order to illustrating the technical solution of the utility model, rather than it is limited
System；Although being described in detail to this utility model with reference to foregoing embodiments, those of ordinary skill in the art should
Understand：It still can be modified to the technical scheme described in foregoing embodiments, or to wherein some or all of
Technical characteristic carries out equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from this practicality new
The scope of type each embodiment technical scheme.
Claims (10)
1. a kind of sand control screen arc combined filtration groove filtration members are it is characterised in that include：
Supporting part, described supporting part is the untight cylindrical cavity in one end, and the bottom surface of the blind end of described cylindrical cavity is arranged
There is at least one first through hole；
Filter house, described filter house is the cylinder with least one filter tank, and described filter tank is included by described cylinder
The vertical slots that interconnect of upper bottom surface to bottom surface and expansion slot, described vertical slots define and upper bottom surface in described upper bottom surface
The upper circular arc of the concyclic heart, described expansion slot defines the lower circular arc with the concyclic heart of bottom surface, described expansion in described bottom surface
In the vertical elongated surfaces of the first side wall that the first side wall opening groove is in described vertical slots；The first side wall of described vertical slots and expansion
The first side wall opening groove is the vertical plane near described cylinder axis on circumferencial direction；
Described filter house is placed in described supporting part and is engaged with the inwall of described supporting part, and the height of described filter house is low
Height in described supporting part.
2. sand control screen arc combined filtration groove filtration members according to claim 1 are it is characterised in that also include inner support
Earial drainage piece and outer screening glass；Described inner support earial drainage piece and outer screening glass are that diameter is circular with described cylinder diameter identical,
At least one second through hole is provided with described inner support earial drainage piece, described outer screening glass is provided with least one threeway
Hole；
Described inner support earial drainage piece is folded between described supporting part and described filter house, and described outer screening glass is arranged on described mistake
The top in filter portion.
3. sand control screen arc combined filtration groove filtration members according to claim 1 and 2 it is characterised in that vertically side
Upwards, the height of described vertical slots and the ratio of the height of described expansion slot are 1：2.
4. sand control screen arc combined filtration groove filtration members according to claim 3 are it is characterised in that described supporting part
It is highly 6-8mm.
5. sand control screen arc combined filtration groove filtration members according to claim 4 are it is characterised in that work as described filter tank
During more than one, described upper circular arc is along the different circle distribution of described upper bottom surface；Wherein, the upper circular arc on same circumference
Symmetrical with respect to the center of circle of described upper bottom surface.
6. sand control screen arc combined filtration groove filtration members according to claim 5 are it is characterised in that described upper circular arc
Including arc-shaped edges on arc-shaped edges and away from the described upper bottom surface center of circle second on the first of the described upper bottom surface center of circle；Described
Any point on arc-shaped edges in distance and described first between the described upper bottom surface center of circle for any point on arc-shaped edges on two is to described
Between the upper bottom surface center of circle, the difference of distance is constant.
7. sand control screen arc combined filtration groove filtration members according to claim 6 are it is characterised in that justify on described second
Any point on arc-shaped edges in distance and described first between the described upper bottom surface center of circle for any point on arc side is to described upper bottom surface
Between the center of circle, the difference of distance is 0.05-1mm.
8. sand control screen arc combined filtration groove filtration members according to claim 7 are it is characterised in that described cylindrical cavity
The bottom surface of blind end a diameter of 25mm.
9. sand control screen arc combined filtration groove filtration members according to claim 8 are led to it is characterised in that working as described first
When hole is more than one, the bottom surface of the blind end in described cylindrical cavity for the described first through hole is uniformly distributed.
10. sand control screen arc combined filtration groove filtration members according to claim 9 are it is characterised in that work as described second
When through hole and third through-hole are respectively greater than one, described second through hole is in petal centered on the center of circle of described inner support earial drainage piece
Shape is uniformly distributed, and described third through-hole is uniformly distributed in petal-shaped centered on the center of circle of described outer screening glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620887985.9U CN205936547U (en) | 2016-08-16 | 2016-08-16 | Arc-shaped composite filter element of sand control screen pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620887985.9U CN205936547U (en) | 2016-08-16 | 2016-08-16 | Arc-shaped composite filter element of sand control screen pipe |
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| Publication Number | Publication Date |
|---|---|
| CN205936547U true CN205936547U (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620887985.9U Active CN205936547U (en) | 2016-08-16 | 2016-08-16 | Arc-shaped composite filter element of sand control screen pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138933A (en) * | 2018-07-27 | 2019-01-04 | 中国石油天然气股份有限公司 | Elastic screen pipe and sand control pipe column |
| CN113565473A (en) * | 2020-04-29 | 2021-10-29 | 中国石油天然气股份有限公司 | Self-cleaning type circular seam sand control filter unit and single sand control screen pipe |
-
2016
- 2016-08-16 CN CN201620887985.9U patent/CN205936547U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138933A (en) * | 2018-07-27 | 2019-01-04 | 中国石油天然气股份有限公司 | Elastic screen pipe and sand control pipe column |
| CN109138933B (en) * | 2018-07-27 | 2020-11-06 | 中国石油天然气股份有限公司 | Elastic screen pipe and sand control pipe column |
| CN113565473A (en) * | 2020-04-29 | 2021-10-29 | 中国石油天然气股份有限公司 | Self-cleaning type circular seam sand control filter unit and single sand control screen pipe |
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