CN108798610A - A kind of sleeve type Fillable Water Control Sieve - Google Patents
A kind of sleeve type Fillable Water Control Sieve Download PDFInfo
- Publication number
- CN108798610A CN108798610A CN201810533935.4A CN201810533935A CN108798610A CN 108798610 A CN108798610 A CN 108798610A CN 201810533935 A CN201810533935 A CN 201810533935A CN 108798610 A CN108798610 A CN 108798610A
- Authority
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- China
- Prior art keywords
- hole
- sliding sleeve
- water control
- pedestal
- fillable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 73
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000007789 sealing Methods 0.000 claims description 13
- 210000000664 rectum Anatomy 0.000 abstract description 10
- 238000012856 packing Methods 0.000 description 12
- 239000012530 fluid Substances 0.000 description 9
- 239000004576 sand Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/082—Screens comprising porous materials, e.g. prepacked screens
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sewage (AREA)
Abstract
The present invention provides a kind of sleeve type Fillable Water Control Sieves, including：The sliding sleeve pedestal of tubulose is provided with first through hole and the second through-hole on side wall；The sliding sleeve of tubulose is movably arranged in sliding sleeve pedestal, and sliding sleeve can block any one in first through hole and the second through-hole；It with the screen pipe for being provided with filter hole on side wall, is sleeved on sliding sleeve pedestal, circulation passage is formed between screen pipe and sliding sleeve pedestal, first through hole, the second through-hole and filter hole are connected to circulation passage.Sleeve type Fillable Water Control Sieve provided by the invention, design is simple, interior latus rectum is machinable larger, and gravel filling and control water function can flexibly switch, it is possible to implement secondary gravel filling.
Description
Technical field
Present document relates to oil and gas exploration technology field, espespecially a kind of sleeve type Fillable Water Control Sieve.
Background technology
Petroleum and natural gas well can production range it is longer, especially in long net horizontal section, due to oil-gas pool distribution unevenness, production
Raw non-uniform pay interval, because the composite factors such as geology and fluid influence, can be discharged after exploiting a period of time in pit shaft,
To realize each horizontal pay interval balanced production, it is necessary to carry out effectively control water.Simultaneously in some loose sand Reservoir Sections, due to
Reservoir sand coefficient of heterogeneity is high and shale content is high, it usually needs gravel fills to reach sand controlling result.The presence of water control device
The circular flow in gravel packing operations is limited, causes gravel packing operations that can not complete.
In view of the above-mentioned problems, the relevant technologies propose it is a kind of be internally provided with volume control device can filling anti-sand filtering
Pipe, interior latus rectum is small, design is complicated, and gravel filling and control water function cannot flexibly switch.
Invention content
In order to solve the above-mentioned technical problem at least one of, there is provided herein a kind of sleeve type Fillable Water Control Sieve its
It is machinable larger to design simple, interior latus rectum, and gravel filling and control water function can flexibly switch.
Sleeve type Fillable Water Control Sieve provided by the invention, including：The sliding sleeve pedestal of tubulose is provided on side wall
One through-hole and the second through-hole；The sliding sleeve of tubulose is movably arranged in the sliding sleeve pedestal, and the sliding sleeve can block described first
Any one in through-hole and second through-hole；With the screen pipe for being provided with filter hole on side wall, it is sleeved on the sliding sleeve base
On seat, circulation passage, the first through hole, second through-hole and institute are formed between the screen pipe and the sliding sleeve pedestal
Filter hole is stated to be connected to the circulation passage.
Optionally, the first through hole and the axially spaced setting of the second through-hole, the sliding sleeve are moveably mounted
In the sliding sleeve pedestal.
Optionally, the first through hole and the circumferentially spaced setting of the second through-hole, the sliding sleeve are rotatably mounted
In the sliding sleeve pedestal, the auxiliary port corresponding to the first through hole and second through-hole is provided on the sliding sleeve.
Optionally, the sleeve type Fillable Water Control Sieve further includes：Water control valve is mounted on the first through hole or described
Second through hole.
Optionally, the water control valve is mounted at the first through hole, and second through-hole is grate opening.
Optionally, the water control valve is mounted on second through hole, and the first through hole is grate opening.
Optionally, the sleeve type Fillable Water Control Sieve further includes：First base tube is connected to the one of the sliding sleeve pedestal
End.
Optionally, the sleeve type Fillable Water Control Sieve further includes：Second base tube is connected to the another of the sliding sleeve pedestal
One end.
Optionally, the screen pipe extends on second base tube, and one end of the circulation passage extends to described
Between two base tubes and the screen pipe.
Optionally, it is provided with sealing element between the sliding sleeve and the sliding sleeve pedestal.
Optionally, the sealing element is sealing ring, and annular groove, the sealing ring peace are provided on the lateral surface of the sliding sleeve
In the annular groove.
Compared with prior art, sleeve type Fillable Water Control Sieve provided by the invention, designing simple, interior latus rectum can add
Work it is larger, and gravel filling and control water function can flexibly switch, it is possible to implement the filling of secondary gravel.
When carrying out gravel packing operations, sliding sleeve is set to act using switching tools, sliding sleeve blocks first through hole and discharges second
Through-hole, packing fluid enter sliding sleeve base interior by screen pipe and the second through-hole, fill Path Setup, and water controling channel is closed, this
When sleeve type Fillable Water Control Sieve be in circulation pattern；After opposite gravel sand off, make sliding sleeve dynamic again using switching tools
Make, sliding sleeve blocks the second through-hole and discharges first through hole, and formation fluid enters sliding sleeve pedestal by screen pipe and first through hole
Inside, water controling channel are established, and filling channel is closed, and screen casing is in control aqueous mode at this time.The program increases the interior latus rectum of sliding sleeve
With can reverse operating function, when needing secondary gravel to fill, above step can also be repeated establish filling channel to carry out two
Secondary filling.
The other feature and advantage of this paper will illustrate in the following description, also, partly become from specification
It is clear that by implementing to understand herein.The purpose of this paper and other advantages can be by specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
Description of the drawings
Attached drawing is used for providing further understanding this paper technical solutions, and a part for constitution instruction, with this Shen
Embodiment please is used to explain the technical solution of this paper together, does not constitute the limitation to this paper technical solutions.
Fig. 1 is the main structure diagram of the sleeve type Fillable Water Control Sieve described in one embodiment of the invention；
Fig. 2 is that the section view partial structurtes when sleeve type Fillable Water Control Sieve described in Fig. 1 carries out gravel packing operations are shown
It is intended to；
Fig. 3 is the section view partial structural diagram when sleeve type Fillable Water Control Sieve described in Fig. 1 carries out control water operation.
Wherein, the correspondence in Fig. 1 to Fig. 3 between reference numeral and component names is as follows：
1 sliding sleeve pedestal, 11 first through hole, 12 second through-holes, 2 sliding sleeves, 3 screen pipes, 4 circulation passages, 5 water control valves, 6 first
Base tube, 7 second base tubes, 8 sealing rings.
Specific implementation mode
To make the purpose, technical scheme and advantage of this paper be more clearly understood, below in conjunction with attached drawing to the reality of this paper
Example is applied to be described in detail.It should be noted that in the absence of conflict, the spy in embodiment and embodiment in the application
Sign mutually can be combined arbitrarily.
Many details are elaborated in the following description in order to fully understand herein, still, can also be adopted herein
Implemented different from mode described here with other, therefore, the protection domain of this paper is not by following public specific implementation
The limitation of example.
The sleeve type Fillable Water Control Sieve of some embodiments herein is described below in conjunction with the accompanying drawings.
Sleeve type Fillable Water Control Sieve provided by the invention, as shown in Figure 1 to Figure 3, including：The sliding sleeve pedestal 1 of tubulose,
First through hole 11 and the second through-hole 12 are provided on its side wall；The sliding sleeve 2 of tubulose is movably arranged in the sliding sleeve pedestal 1, and
The sliding sleeve 2 can block any one in the first through hole 11 and second through-hole 12；It is provided at least on side wall
The screen pipe 3 of one filter hole is sleeved on the sliding sleeve pedestal 1, is formed between the screen pipe 3 and the sliding sleeve pedestal 1
There are circulation passage 4, the first through hole 11, second through-hole 12 and the filter hole to be connected to the circulation passage 4.
Sleeve type Fillable Water Control Sieve provided by the invention, simply, in sliding sleeve 2 latus rectum is machinable larger for design,
And gravel filling and control water function can flexibly switch, it is possible to implement secondary gravel filling.
When carrying out gravel packing operations, as shown in Fig. 2, making sliding sleeve 2 act using switching tools, it is logical that sliding sleeve 2 blocks first
Hole 11 and discharge the second through-hole 12, packing fluid is entered by screen pipe 3 and the second through-hole 12 inside sliding sleeve pedestal 1, and channel is filled
It establishes, water controling channel is closed, and sleeve type Fillable Water Control Sieve is in circulation pattern at this time；After opposite gravel sand off, into
When row control water operation, as shown in figure 3, using switching tools acting again sliding sleeve 2, sliding sleeve 2 blocks the second through-hole 12 and discharges the
One through-hole 11, formation fluid are entered by screen pipe 3 and first through hole 11 inside sliding sleeve pedestal 1, and water controling channel is established, filling
Channel is closed.The program increase sliding sleeve 2 interior latus rectum and can reverse operating function, when needing secondary gravel to fill, also
It can repeat above step and establish the secondary filling of filling channel progress.
Wherein, as shown in Figures 2 and 3, the sleeve type Fillable Water Control Sieve further includes：Water control valve 5 is mounted on described
At first through hole 11 or second through-hole 12.When the water control valve 5 is mounted at the first through hole 11, second through-hole
12 are designed as grate opening, and grate opening can increase circulation area.It is described when the water control valve 5 is mounted at second through-hole 12
First through hole 11 is grate opening, and grate opening can increase circulation area.
Specifically, as shown in Figures 2 and 3, first through hole 11 is located at the top of the second through-hole 12, and water control valve 5 is mounted on the
At two through-holes 12, first through hole 11 is grate opening.
In one embodiment of the present of invention, as shown in Figures 2 and 3, the first through hole 11 and 12 edge of the second through-hole
Axially spaced-apart is arranged, and the sliding sleeve 2 is movably mounted in the sliding sleeve pedestal 1, and sliding sleeve 2 is moved back and forth along axis, realizes
Switching blocks first through hole 11 and the second through-hole 12.
It is of course also possible to be：The 12 circumferentially spaced setting of the first through hole 11 and second through-hole, the sliding sleeve 2
It is installed in rotation in the sliding sleeve pedestal 1 (this scheme is not shown in figure), is provided on the sliding sleeve 2 corresponding to described
The auxiliary port of one through-hole 11 and second through-hole 12, reciprocating rotation, realization switching block first through hole 11 to sliding sleeve 2 in the circumferential
With the second through-hole 12, block first through hole 11 when, auxiliary port turns at the second through-hole 12, the second through-hole 12 by auxiliary port with
2 inside connection of sliding sleeve, when blocking the second through-hole 12, auxiliary port turns at first through hole 11, and first through hole 11 passes through auxiliary port
It is connected to 2 inside of sliding sleeve.
The purpose of the application can be achieved in two above scheme, and objective is without departing from design philosophy of the invention, no longer
It repeats, should all belong in the protection domain of the application.
Further, as shown in Figure 1 to Figure 3, the sleeve type Fillable Water Control Sieve further includes：First base tube 6, connection
In the upper end of the sliding sleeve pedestal 1；With the second base tube 7, it is connected to the lower end of the sliding sleeve pedestal 1.
Still further, as shown in Figures 2 and 3, the screen pipe 3 extends downward on second base tube 7, the stream
The lower end of circulation passage 4 extends between second base tube 7 and the screen pipe 3.Moreover, the sliding sleeve 2 and the sliding sleeve base
It is provided with sealing element between seat 1, to block the gap between sliding sleeve 2 and sliding sleeve pedestal 1.
When carrying out gravel packing operations, as shown in Fig. 2, making sliding sleeve 2 move down using switching tools, expose first through hole
11, the second through-hole 12 is blocked, packing fluid is entered by screen pipe 3 and first through hole 11 inside the first base tube 6, and filling channel is built
Vertical, water control valve 5 is insulated, and water controling channel is closed, and sleeve type Fillable Water Control Sieve is in circulation pattern at this time；Opposite gravel fills
After filling out, as shown in figure 3, making sliding sleeve 2 move up using switching tools, exposes the second through-hole 12, blocks first through hole 11,
Formation fluid is entered by screen pipe 3 and water control valve 5 inside the second base tube 7, and water controling channel is established, and filling channel is closed, this
When sleeve type Fillable Water Control Sieve be in control aqueous mode.
Specifically, as shown in Figures 2 and 3, the sealing element is sealing ring 8, and ring is provided on the lateral surface of the sliding sleeve 2
Shape slot, the sealing ring 8 are mounted in the annular groove and are against on the medial surface of sliding sleeve pedestal 1.
Sleeve type Fillable Water Control Sieve provided by the invention can be used cooperatively with existing filling service aid, be increased
Flow pack is added and has controlled the mutual handoff functionality of water, it is possible to implement secondary gravel filling.
I.e.：Sleeve type Fillable Water Control Sieve is applied in SIMULATION STUDY OF GRAVEL PACKING IN HORIZONTAL WELL control hydraulic art, increases flow pack
Circulation area increases the interior latus rectum of sleeve type Fillable Water Control Sieve (i.e.：2 internal diameter of sliding sleeve is big), increase control water process
Reliability reduces filling service aid sand card risk and operation construction period, reduces the manufacture of sleeve type Fillable Water Control Sieve
Cost improves the reliability of stowing operation, extends the service life of sleeve type Fillable Water Control Sieve, reduces well repairing cost
With.
In conclusion sleeve type Fillable Water Control Sieve provided by the invention, design is simple, interior latus rectum it is machinable compared with
Greatly, and gravel filling and control water function can flexibly switch, it is possible to implement secondary gravel filling.
When carrying out gravel packing operations, sliding sleeve is set to act using switching tools, sliding sleeve blocks first through hole and discharges second
Through-hole, packing fluid enter sliding sleeve base interior by screen pipe and the second through-hole, fill Path Setup, and water controling channel is closed, this
When sleeve type Fillable Water Control Sieve be in circulation pattern；After opposite gravel sand off, make sliding sleeve dynamic again using switching tools
Make, sliding sleeve blocks the second through-hole and discharges first through hole, and formation fluid enters sliding sleeve pedestal by screen pipe and first through hole
Inside, water controling channel are established, and filling channel is closed, and screen casing is in control aqueous mode at this time.The program increases the interior latus rectum of sliding sleeve
With can reverse operating function, when needing secondary gravel to fill, above step can also be repeated establish filling channel to carry out two
Secondary filling.
In description herein, term " installation ", " connected ", " connection ", " fixation " etc. shall be understood in a broad sense, for example,
" connection " may be fixed connection or may be dismantle connection, or integral connection；It can be directly connected, can also lead to
Intermediary is crossed to be indirectly connected.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning herein.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of this paper
In example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or example.
Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more of the embodiments or examples with suitable
Mode combine.
Although embodiment disclosed herein is as above, the content only implementation of use herein for ease of understanding
Mode is not limited to herein.Technical staff in any this paper fields, do not depart from spirit disclosed herein and
Under the premise of range, any modification and variation, but the patent protection model of this paper can be carried out in the form and details of implementation
It encloses, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of sleeve type Fillable Water Control Sieve, which is characterized in that including：
The sliding sleeve pedestal of tubulose is provided with first through hole and the second through-hole on side wall；
The sliding sleeve of tubulose is movably arranged in the sliding sleeve pedestal, and the sliding sleeve can block the first through hole and described
Any one in two through-holes；With
It is provided with the screen pipe of filter hole on side wall, is sleeved on the sliding sleeve pedestal, the screen pipe and the sliding sleeve pedestal
Between be formed with circulation passage, the first through hole, second through-hole and the filter hole are connected to the circulation passage.
2. sleeve type Fillable Water Control Sieve according to claim 1, which is characterized in that the first through hole and described
The axially spaced setting of two through-holes, the sliding sleeve are movably mounted in the sliding sleeve pedestal.
3. sleeve type Fillable Water Control Sieve according to claim 1, which is characterized in that the first through hole and described
The circumferentially spaced setting of two through-holes, the sliding sleeve are installed in rotation in the sliding sleeve pedestal, are provided on the sliding sleeve pair
The auxiliary port of first through hole described in Ying Yu and second through-hole.
4. sleeve type Fillable Water Control Sieve according to any one of claim 1 to 3, which is characterized in that further include：
Water control valve is mounted on the first through hole or second through hole.
5. sleeve type Fillable Water Control Sieve according to claim 4, which is characterized in that
The water control valve is mounted at the first through hole, and second through-hole is grate opening；Or
The water control valve is mounted on second through hole, and the first through hole is grate opening.
6. sleeve type Fillable Water Control Sieve according to any one of claim 1 to 3, which is characterized in that further include：
First base tube is connected to one end of the sliding sleeve pedestal.
7. sleeve type Fillable Water Control Sieve according to claim 6, which is characterized in that further include：
Second base tube is connected to the other end of the sliding sleeve pedestal.
8. sleeve type Fillable Water Control Sieve according to claim 7, which is characterized in that the screen pipe extends to described
On second base tube, one end of the circulation passage extends between second base tube and the screen pipe.
9. sleeve type Fillable Water Control Sieve according to any one of claim 1 to 3, which is characterized in that the sliding sleeve
It is provided with sealing element between the sliding sleeve pedestal.
10. sleeve type Fillable Water Control Sieve according to claim 9, which is characterized in that the sealing element is sealing ring,
Annular groove is provided on the lateral surface of the sliding sleeve, the sealing ring is mounted in the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810533935.4A CN108798610A (en) | 2018-05-29 | 2018-05-29 | A kind of sleeve type Fillable Water Control Sieve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810533935.4A CN108798610A (en) | 2018-05-29 | 2018-05-29 | A kind of sleeve type Fillable Water Control Sieve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108798610A true CN108798610A (en) | 2018-11-13 |
Family
ID=64089256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810533935.4A Pending CN108798610A (en) | 2018-05-29 | 2018-05-29 | A kind of sleeve type Fillable Water Control Sieve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108798610A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622868A (en) * | 2020-05-06 | 2021-11-09 | 中国石油化工股份有限公司 | Differential pressure type sliding sleeve with water control function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040084177A1 (en) * | 2002-07-29 | 2004-05-06 | Wang David Wei | Mesh screen apparatus and method of manufacture |
| CN201144677Y (en) * | 2008-01-04 | 2008-11-05 | 安东石油技术（集团）有限公司 | Fillable water control screen pipe |
| CN204283367U (en) * | 2014-12-08 | 2015-04-22 | 众通（北京）能源技术有限公司 | Horizontal well Intelligent water-controlled completion tubular column |
| CN105569617A (en) * | 2015-11-19 | 2016-05-11 | 中国石油集团西部钻探工程有限公司 | Opening and closing type oil production and water control device |
| CN208330302U (en) * | 2018-05-29 | 2019-01-04 | 中国海洋石油集团有限公司 | A kind of screen casing |
-
2018
- 2018-05-29 CN CN201810533935.4A patent/CN108798610A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040084177A1 (en) * | 2002-07-29 | 2004-05-06 | Wang David Wei | Mesh screen apparatus and method of manufacture |
| CN201144677Y (en) * | 2008-01-04 | 2008-11-05 | 安东石油技术（集团）有限公司 | Fillable water control screen pipe |
| CN204283367U (en) * | 2014-12-08 | 2015-04-22 | 众通（北京）能源技术有限公司 | Horizontal well Intelligent water-controlled completion tubular column |
| CN105569617A (en) * | 2015-11-19 | 2016-05-11 | 中国石油集团西部钻探工程有限公司 | Opening and closing type oil production and water control device |
| CN208330302U (en) * | 2018-05-29 | 2019-01-04 | 中国海洋石油集团有限公司 | A kind of screen casing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113622868A (en) * | 2020-05-06 | 2021-11-09 | 中国石油化工股份有限公司 | Differential pressure type sliding sleeve with water control function |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181113 |
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