CN204098889U - Controllable high-temperature slide sleeve packer staged fracturing tool - Google Patents
Controllable high-temperature slide sleeve packer staged fracturing tool Download PDFInfo
- Publication number
- CN204098889U CN204098889U CN201420541199.4U CN201420541199U CN204098889U CN 204098889 U CN204098889 U CN 204098889U CN 201420541199 U CN201420541199 U CN 201420541199U CN 204098889 U CN204098889 U CN 204098889U
- Authority
- CN
- China
- Prior art keywords
- packer
- sliding sleeve
- sand
- joint
- frac
- 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.)
- Expired - Fee Related
Links
Abstract
A kind of controllable high-temperature slide sleeve packer staged fracturing tool, the upper end of the first sandblaster is provided with the first packer, first packer upper end is provided with 1 ~ 6 grade of frac-sand jet mutually connected up and down, the upper end of the 6th grade of frac-sand jet is provided with sand-proof hydraulic anchor, and sand-proof hydraulic anchor upper end is provided with hydraulic safety connector.Because the packing element of the controllable confining of the every one-level fracturing packer of the utility model adopts high-strength material, heatproof 150 DEG C, the 70MPa of resistance to pressure reduction.The heatproof rank of packer is greater than the temperature on stratum, improves the conformability of packer.The utility model has the advantages such as pressure break efficiency is high, fracturing effect good, adapt to hot environment, convenient operation, safety and environmental protection, construction risk are low, can be used as the fracturing tool of oilfield exploitation oil and natural gas.
Description
Technical field
The utility model belongs to producing oil, gas, water from well; The method of solubility or solubilized material or slurry of mineral or equipment technical field, be specifically related to the fracturing tool of oil-gas Layer.
Technical background
The staged fracturing of oil exploitation horizontal well, is generally mechanical type staged fracturing, and this pressure break mode is improve reservoir permeability and increase the injection rate of exploiting well yield and Injection Well to contribute, but also also there is following deficiency simultaneously:
By the mandatory section construction of fracturing packer, after pressure break completes an interval, upper lifting pipe post, carries out the pressing crack construction of next interval, causes the complete rear packer of pressure break to be difficult to deblocking so first; Due to upper lifting pipe post packer sustain damage, poorly sealed, cause pressure break to lose efficacy; The complete rear strata pressure of pressure break is higher, easily occurs gusher phenomenon, cause the accident during upper lifting pipe post; The method operability is poor, and technique is loaded down with trivial details, carries tubing string at every turn and needs dismounting well head and pressure break pipeline, and program is complicated, and labor intensity of operating staff is large, poor stability.
At present, the packer that oil field compression fracture construction is commonly used is compression and inflatable packer, and due to the limitation of packer in the withstand voltage difference of resistance to gentleness, high to bottom hole temperature (BHT) and that formation fracture pressure gradient is high well is difficult in applying at the scene realize.
There is deblocking difficulty in applying at the scene in compression slide sleeve packer fracturing device, after site operation completes, fracturing tool is difficult to take out, and when carrying out the treatment measures such as maintenance overhaul in later stage to fracturing tool easy formation environment.
Oil field at home is in the transformation of the stratum of deep-well, and generally select the method for external fracturing tool or general pressure break to carry out stratum transformation, external fracturing tool selling price is high, and general pressure break formation transformation is insufficient.In oil and natural gas production technique field, the technical problem that current need urgently solve be to provide a kind of rational in infrastructure, adapt to adverse circumstances, set deblocking convenience, safety and environmental protection, selling price is low, fracturing effect good, can in deep-well the fracturing tool of recover petroleum and natural gas.
Summary of the invention
Technical problem to be solved in the utility model is the shortcoming overcoming above-mentioned fracturing device, provide a kind of rational in infrastructure, pressure break efficiency is high, fracturing effect good, adapt to hot environment, convenient operation, safety and environmental protection, controllable high-temperature slide sleeve packer staged fracturing tool that construction risk is low.
Solving the problems of the technologies described above adopted technical scheme is: the upper end of sandblaster is provided with packer, packer upper end is provided with 1 ~ 6 grade of frac-sand jet mutually connected up and down, the upper end of the 6th grade of frac-sand jet is provided with sand-proof hydraulic anchor, and sand-proof hydraulic anchor upper end is provided with hydraulic safety connector.
First order frac-sand jet of the present utility model is: arrange the first sand blower of sliding sleeve in the upper end of packer, and the upper end of the first sand blower of sliding sleeve is provided with the first safety joint, and the first safety joint upper end is provided with the first controllable confining.
First sand blower of sliding sleeve of the present utility model is: in the long scope of the 1m of sliding sleeve body, same sagittal plane radial equipartition is provided with 3 blast nozzles, the sandblasting hole of blast nozzle is oval slotted eye, sliding sleeve endosome is provided with in sliding sleeve body, in sliding sleeve, shape is the tubular body that right-hand member is closed, the center of sliding sleeve endosome right-hand member is processed with centre bore, form ball seat, sliding sleeve body exterior left end is provided with sandblaster top connection, right-hand member is provided with sandblaster lower contact.
The major axis of oval slotted eye of the present utility model is 18 ~ 20mm, minor axis is 14 ~ 16mm, and the major axis of oval slotted eye is positioned at axis.
First controllable confining of the present utility model is: packer top connection is provided with central tube, central tube upper end is provided with packing element upper binding head, lower end is provided with packing element lower union joint, central tube lower end is provided with the over cure joint overlapped with packing element lower union joint, over cure joint lower end is provided with transition joint, arrange the sliding sleeve that ball is equipped with in lower end in transition joint, transition joint lower end is provided with lower contact.
Because the utility model adopts 1 ~ 6 grade of frac-sand jet connected up and down, the packing element of the controllable confining of every one-level fracturing packer adopts high-strength material, heatproof 150 DEG C, the 70MPa of resistance to pressure reduction.The heatproof rank of packer is greater than the temperature on stratum, improves the conformability of packer.The utility model has the advantages such as pressure break efficiency is high, fracturing effect good, adapt to hot environment, convenient operation, safety and environmental protection, construction risk are low, can be used as the fracturing tool of oilfield exploitation oil and natural gas.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the structural representation of the first sand blower of sliding sleeve 3 in Fig. 1.
Fig. 3 is the structural representation of the first controllable confining 5 in Fig. 1.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further described, but the utility model is not limited to these embodiments.
Embodiment 1
Formed controllable high-temperature slide sleeve packer staged fracturing tool for 2 grades of frac-sand jets and other component, its structure is as follows:
In FIG, the controllable high-temperature slide sleeve packer staged fracturing tool of the present embodiment is made up of sandblaster 1, packer 2, first sand blower of sliding sleeve 3, first safety joint 4, first controllable confining 5, second sand blower of sliding sleeve 6, second safety joint 7, second controllable confining 8, second sand blower of sliding sleeve 6, second safety joint 7, second controllable confining 8, sand-proof hydraulic anchor 9, hydraulic safety connector 10, splice sleeve 11 connection.Wherein the first sand blower of sliding sleeve 3, first safety joint 4, first controllable confining 5 connects formation first order frac-sand jet, and the second sand blower of sliding sleeve 6, second safety joint 7 and the second controllable confining 8 connect formation second level frac-sand jet.
The sandblaster 1 of the present embodiment is identical with the structure of existing hydraulic perforating sandblaster, connected by the lower end of screw thread with packer 2 with splice sleeve 11 in the upper end of sandblaster 1, the structure of packer 2 is identical with the structure of the packer of existing hydraulic perforating, adopting high-temperature packer, upwards flowing for preventing the fracturing sand used during fracturing work.The upper end of packer 2 is connected by the lower end of screw thread with the first sand blower of sliding sleeve 3 with splice sleeve 11, the upper end of the first sand blower of sliding sleeve 3 is connected by the lower end of screw thread with the first safety joint 4 with splice sleeve 11, the upper end of the first safety joint 4 is connected by the lower end of screw thread with the first controllable confining 5 with splice sleeve 11, and the first sand blower of sliding sleeve 3, first safety joint 4 connects with the first controllable confining 5 and forms first order frac-sand jet.The upper end of the first controllable confining 5 is connected by the lower end of screw thread with the second sand blower of sliding sleeve 6 with splice sleeve 11, the upper end of the second sand blower of sliding sleeve 6 is connected by the lower end of screw thread with the second safety joint 7 with splice sleeve 11, the upper end of the second safety joint 7 is connected by the lower end of screw thread with the second controllable confining 8 with splice sleeve 11, second sand blower of sliding sleeve 6, second safety joint 7 and the second controllable confining 8 connect and form second level frac-sand jet, the component of the second frac-sand jet and the connecting relation of component identical with the first frac-sand jet.First controllable confining 5 of the present embodiment and the second controllable confining 8 select and adopt controllable expansion packer, flow up and down for preventing the fracturing sand used during fracturing work.The upper end of the second controllable confining 8 is connected by the lower end of screw thread with sand-proof hydraulic anchor 9 with splice sleeve 11, and the upper end of sand-proof hydraulic anchor 9 connects with the lower end of splice sleeve 11 with hydraulic safety connector 10.
In fig. 2, first sand blower of sliding sleeve 3 of the present embodiment is made up of sliding sleeve body 3-1, blast nozzle 3-2, sandblaster top connection 3-3, sliding sleeve endosome 3-4, sandblaster lower contact 3-5 connection.
The shape of sliding sleeve body 3-1 is tubular body, in the long scope of 1m of sliding sleeve body 3-1, same sagittal plane radial equipartition is provided with 3 blast nozzle 3-2, blast nozzle 3-2 Hardmetal materials 42CrMo makes, the sandblasting hole of blast nozzle 3-2 is oval slotted eye, the major axis of oval slotted eye is 19mm, minor axis is 15mm, the major axis of oval slotted eye is positioned at axis, sliding sleeve endosome 3-4 is installed in sliding sleeve body 3-1, sliding sleeve endosome 3-4 shape is the tubular body that right-hand member is closed, the center of sliding sleeve endosome 3-4 right-hand member is processed with centre bore, forms ball seat.Sliding sleeve endosome 3-4 can move left and right in sliding sleeve body 3-1, and the outside left end of sliding sleeve body 3-1 is provided with sandblaster top connection 3-3, right-hand member is provided with sandblaster lower contact 3-5.
The present embodiment second controllable confining 8 is identical with the structure of the first sand blower of sliding sleeve 3.
In figure 3, first controllable confining 5 of the present embodiment is made up of packer top connection 5-1, central tube 5-2, packing element upper binding head 5-3, packing element 5-4, packing element lower union joint 5-5, over cure joint 5-6, sliding sleeve 5-7, packer transition joint 5-8, ball 5-9, packer lower contact 5-10 connection.
Packer top connection 5-1 is connected with central tube 5-2 by screw thread, central tube 5-2 upper end has been threaded connection packing element upper binding head 5-3, lower end has been threaded connection packing element lower union joint 5-5, packing element upper binding head 5-3 and packing element lower union joint 5-5 is fixed on packing element 5-4 on central tube 5-2, packing element 5-2 adopts high-strength material, heatproof 150 DEG C, the 70MPa of resistance to pressure reduction.Central tube 5-2 lower end is threaded connection over cure joint 5-6, central tube 5-2 lower end is provided with the over cure joint 5-6 overlapped with packing element lower union joint 5-5, over cure joint 5-6 lower end is connected with transition joint 5-8 by screw thread, sliding sleeve 5-7 is connected with in transition joint 5-8, in sliding sleeve 5-7, ball 5-9 is equipped with in lower end, sliding sleeve 5-7 is used for the gap between center seal pipe 5-2 and transition joint 5-8, and transition joint 5-8 lower end has been threaded connection lower contact 5-10.
Second controllable confining 8 of the present embodiment is identical with the first controllable confining 5 structure.
Embodiment 2
Formed controllable high-temperature slide sleeve packer staged fracturing tool for 2 grades of frac-sand jets and other component, its structure is as follows:
In the present embodiment, the shape of the sliding sleeve body 3-1 of the first sand blower of sliding sleeve 3 is tubular body, in the long scope of 1m of sliding sleeve body 3-1, same sagittal plane radial equipartition is provided with 3 blast nozzle 3-2, blast nozzle 3-2 Hardmetal materials 42CrMo makes, the sandblasting hole of blast nozzle 3-2 is oval slotted eye, the major axis of oval slotted eye is 18mm, minor axis is 14mm, the major axis of oval slotted eye is positioned at axis, other component of the first sand blower of sliding sleeve 3 and the connecting relation of component identical with embodiment 1.
The connecting relation of other component and component is identical with embodiment 1.
Embodiment 3
Formed controllable high-temperature slide sleeve packer staged fracturing tool for 2 grades of frac-sand jets and other component, its structure is as follows:
In the present embodiment, the shape of the sliding sleeve body 3-1 of the first sand blower of sliding sleeve 3 is tubular body, in the long scope of 1m of sliding sleeve body 3-1, same sagittal plane radial equipartition is provided with 3 blast nozzle 3-2, blast nozzle 3-2 Hardmetal materials 42CrMo makes, the sandblasting hole of blast nozzle 3-2 is oval slotted eye, the major axis of oval slotted eye is 20mm, minor axis is 16mm, the major axis of oval slotted eye is positioned at axis, other component of the first sand blower of sliding sleeve 3 and the connecting relation of component identical with embodiment 1.
The connecting relation of other component and component is identical with embodiment 1.
Embodiment 4
Formed controllable high-temperature slide sleeve packer staged fracturing tool for 1 grade of frac-sand jet and other component, its structure is as follows:
In above embodiment 1 ~ 3, the upper end of sandblaster 1 is connected by the lower end of screw thread with packer 2 with splice sleeve 11, high-temperature packer selected by packer 2, upwards flow for preventing the fracturing sand used during fracturing work, the upper end of packer 2 is connected with first order frac-sand jet by screw thread with splice sleeve 11, and the structure of first order frac-sand jet is identical with corresponding embodiment.The upper end splice sleeve 11 of first order frac-sand jet is connected with sand-proof hydraulic anchor 9 by screw thread, and sand-proof hydraulic anchor 9 upper end splice sleeve 11 is connected by the lower end of screw thread with hydraulic safety connector 10.The connecting relation of other component and component is identical with embodiment 1.
Embodiment 5
Formed controllable high-temperature slide sleeve packer staged fracturing tool for 6 grades of frac-sand jets and other component, its structure is as follows:
In above embodiment 1 ~ 3, connected by the lower end of screw thread with packer 2 with splice sleeve 11 in the upper end of sandblaster 1, high-temperature packer selected by packer 2, upwards flow for preventing the fracturing sand used during fracturing work, the upper end splice sleeve 11 of packer 2 is connected with 6 grades of frac-sand jets that draw bail is identical up and down mutually by screw thread, the upper end splice sleeve 11 of the 6th grade of frac-sand jet is connected with sand-proof hydraulic anchor 9 by screw thread, and sand-proof hydraulic anchor 9 upper end splice sleeve 11 is connected by the lower end of screw thread with hydraulic safety connector 10.The connecting relation of other component and component is identical with embodiment 1.
Operating principle of the present utility model is as follows:
The controllable confining of frac-sand jet sets deblocking: dropped into by ball 5-9, ball 5-9 opens the feed liquor switch of the controllable confining of every one-level frac-sand jet, after the feed liquor switch open of packer, the water under high pressure entered in oil pipe enters into packer and can set, when not entering water under high pressure, the automatic deblocking of packer.
Corresponding packer and sliding sleeve are opened in pressure break corresponding layer position.
The pressure break principle of sandblaster 1 and packer 2 is: ball 5-9 opens the sliding sleeve 5-7 of the first controllable confining 5, continue to come downwards in the first sand blower of sliding sleeve 3, open the sliding sleeve endosome 3-4 of the first sand blower of sliding sleeve 3, the sliding sleeve endosome 3-2 of ball 5-9 and the first sand blower of sliding sleeve 3 continues descending under the effect of the pressure, drops in the ball seat of packer 2, completes a ball and beats two sliding sleeve 5-7, packer 2 sets, sandblaster 1 sprays high pressure burning into sand water, and formation carries out pressure break, completes first paragraph pressure break.
The pressure break principle of first order frac-sand jet is: ball 5-9 opens the sliding sleeve 5-7 of the first controllable confining 5, and the controllable high-temperature packer in Fig. 1 could normally work; Ball 5-9 continues to come downwards to the first sand blower of sliding sleeve 3, by ground pressure, the sliding sleeve endosome 3-4 of the first sand blower of sliding sleeve 3 is pushed in sandblaster 1, seal up the passage with packer 2, ensure that packer 2 and the first controllable confining 5 set simultaneously, the packer of other frac-sand jet does not set, spray high pressure burning into sand water from the first sand blower of sliding sleeve 3, formation carries out pressure break, completes second segment pressure break.
The pressure break principle of second level frac-sand jet is: second level frac-sand jet is undertaken by the second sand blower of sliding sleeve 6, second safety joint 7, second controllable confining 8 bottom pressure break, operating principle is identical with the pressure break principle of first order frac-sand jet, and the pressure break principle of all the other grade of frac-sand jet is identical with the pressure break principle of first order frac-sand jet.
Claims (5)
1. a controllable high-temperature slide sleeve packer staged fracturing tool, it is characterized in that: the upper end of sandblaster (1) is provided with packer (2), packer (2) upper end is provided with 1 ~ 6 grade of frac-sand jet mutually connected up and down, the upper end of the 6th grade of frac-sand jet is provided with sand-proof hydraulic anchor (9), and sand-proof hydraulic anchor (9) upper end is provided with hydraulic safety connector (10).
2. controllable high-temperature slide sleeve packer staged fracturing tool according to claim 1, it is characterized in that described first order frac-sand jet is: the first sand blower of sliding sleeve (3) is set in the upper end of packer (2), the upper end of the first sand blower of sliding sleeve (3) is provided with the first safety joint (4), and the first safety joint (4) upper end is provided with the first controllable confining (5).
3. controllable high-temperature slide sleeve packer staged fracturing tool according to claim 2, it is characterized in that described the first sand blower of sliding sleeve (3) is: same sagittal plane radial equipartition is provided with 3 blast nozzles (3-2) in the long scope of 1m of sliding sleeve body (3-1), the sandblasting hole of blast nozzle (3-2) is oval slotted eye, sliding sleeve endosome (3-4) is provided with in sliding sleeve body (3-1), sliding sleeve endosome (3-4) shape is the tubular body that right-hand member is closed, the center of sliding sleeve endosome (3-4) right-hand member is processed with centre bore, form ball seat, sliding sleeve body (3-1) outside left end is provided with sandblaster top connection (3-3), right-hand member is provided with sandblaster lower contact (3-5).
4. controllable high-temperature slide sleeve packer staged fracturing tool according to claim 3, is characterized in that: the major axis of described oval slotted eye is 18 ~ 20mm, minor axis is 14 ~ 16mm, and the major axis of oval slotted eye is positioned at axis.
5. controllable high-temperature slide sleeve packer staged fracturing tool according to claim 2, it is characterized in that: described the first controllable confining (5) is: packer top connection (5-1) is provided with central tube (5-2), central tube (5-2) upper end is provided with packing element upper binding head (5-3), lower end is provided with packing element lower union joint (5-5), central tube (5-2) lower end is provided with the over cure joint (5-6) overlapped with packing element lower union joint (5-5), over cure joint (5-6) lower end is provided with transition joint (5-8), the sliding sleeve (5-7) that ball (5-9) is equipped with in lower end is set in transition joint (5-8), transition joint (5-8) lower end is provided with lower contact (5-10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420541199.4U CN204098889U (en) | 2014-09-19 | 2014-09-19 | Controllable high-temperature slide sleeve packer staged fracturing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420541199.4U CN204098889U (en) | 2014-09-19 | 2014-09-19 | Controllable high-temperature slide sleeve packer staged fracturing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204098889U true CN204098889U (en) | 2015-01-14 |
Family
ID=52267326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420541199.4U Expired - Fee Related CN204098889U (en) | 2014-09-19 | 2014-09-19 | Controllable high-temperature slide sleeve packer staged fracturing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204098889U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986797A (en) * | 2015-02-13 | 2016-10-05 | 中国石油天然气股份有限公司 | Staged fracturing method of horizontal well |
| CN112554856A (en) * | 2020-12-01 | 2021-03-26 | 大庆油田有限责任公司 | Pipe post is pressed to successive layer shutoff formula multilayer seat suitable for big liquid measure |
-
2014
- 2014-09-19 CN CN201420541199.4U patent/CN204098889U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986797A (en) * | 2015-02-13 | 2016-10-05 | 中国石油天然气股份有限公司 | Staged fracturing method of horizontal well |
| CN105986797B (en) * | 2015-02-13 | 2018-12-25 | 中国石油天然气股份有限公司 | The staged fracturing method of horizontal well |
| CN112554856A (en) * | 2020-12-01 | 2021-03-26 | 大庆油田有限责任公司 | Pipe post is pressed to successive layer shutoff formula multilayer seat suitable for big liquid measure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105507865B (en) | The method of refracturing for oil gas water well | |
| CN204098878U (en) | Device made by a kind of abrasive material perforation sandblasting pressure break connection | |
| CN201212387Y (en) | Gas injection, gas production and brine discharge integration process pipe column for underground gas storage | |
| CN107035352B (en) | A kind of water-jet infinite stages fracturing device and fracturing process | |
| CN105804680B (en) | A kind of oil gas field workover operation device with pressure and method | |
| CN102979495A (en) | Multi-cluster current limiting fracturing string of open hole horizontal well and fracturing method thereof | |
| CN102022104A (en) | Open-hole packer for open-hole horizontal well and preset connector fracturing well completion method | |
| CN105484699A (en) | Drilling and milling-free bridge plug for fracturing | |
| CN104213895A (en) | Hydraulic sand jet perforation, fracture and sand filling integrated technological method | |
| CN204113261U (en) | A kind of layered fracturing pipe string | |
| CN111101895A (en) | Underground multilayer seat pressure one-way plugging type switch | |
| CN103912257B (en) | A kind of dragging multiple fracturing device with pressure | |
| CN204098889U (en) | Controllable high-temperature slide sleeve packer staged fracturing tool | |
| CN201826805U (en) | Tubing plug for oil and gas field | |
| CN104343424A (en) | Coalbed-methane horizontal-well PE (poly ethylene) screen pipe well completion application process method | |
| CN204082116U (en) | Oil well horizontal well oil jacket is with note formula two envelope single deck tape-recorder volume fracturing tubing string | |
| CN205297515U (en) | Coiled tubing drags hydraulic jet fracturing device | |
| CN204386577U (en) | The protective jacket in sliding sleeve fracturing hole and sliding sleeve | |
| CN203808964U (en) | Horizontal well multilevel ejection fracturing tool | |
| CN203879478U (en) | Hydraulic sandblasting volume fracturing pipe column | |
| CN202250015U (en) | Segmented fracturing device of slide sleeve packer | |
| CN206376810U (en) | A kind of oil field is every using long packing element packer | |
| CN204851208U (en) | Sliding sleeve packer staged fracturing device | |
| CN204877415U (en) | Horizontal well staged fracturing tubular column | |
| CN104074487A (en) | Packer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200924 Address after: 100000 Beijing city Dongcheng District No. 16 Andrew Patentee after: PetroChina Co.,Ltd. Address before: 063004 No.51 Xinhua West Road, North Lu Bei District, Tangshan City, Hebei Province Patentee before: Wu Jun |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20210919 |