CN206158642U - A core draws drilling tool for prospecting - Google Patents
A core draws drilling tool for prospecting Download PDFInfo
- Publication number
- CN206158642U CN206158642U CN201621158621.3U CN201621158621U CN206158642U CN 206158642 U CN206158642 U CN 206158642U CN 201621158621 U CN201621158621 U CN 201621158621U CN 206158642 U CN206158642 U CN 206158642U
- Authority
- CN
- China
- Prior art keywords
- core
- adaptor
- drilling tool
- ring
- inner core
- Prior art date
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Abstract
The utility model provides a core draws drilling tool for prospecting, include: drilling rod, drill bit and circumferential resection device, the drilling rod includes urceolus and inner tube that coaxial rotation connects, the drill bit is connected the lower extreme of urceolus, the inside cavity that holds the core that forms of inner tube. The utility model provides a core draws drilling tool for prospecting forms the circular cutting groove through circumferential resection device at the lower extreme of core in advance, has reduced the core at the structural strength of circular cutting groove department, pulling force when having reduced the intercepting core, and core along circular cutting groove fracture, the fracture is controllable, the integrality of protection core, the equipment that prevents simultaneously damages, has prolonged life.
Description
Technical field
This utility model is related to geological prospecting equipment, and more particularly to a kind of core for geological prospecting extracts drilling tool.
Background technology
Core is the needs according to geological work or engineering, using ring bit and other coring tools, is taken out from hole
Cylindric rock sample.Core is the material important in kind for studying and understanding subsurface geology and mineral products situation.For example in oil, gas
During field is explored and developed, by the stratigraphic horizon that obtains of prospecting and projected depth, into well under enter coring tool, drill through out core,
So as to understand oilbearing stratum and contained characteristic of fluid.
Existing coring tool is usually drilling and coring delivery, has cavity in drill bit and drilling rod center, and cavity lower end is provided with ring-type and embraces
Tight device, when drill bit feeds, core is stretched in cavity, and after reaching the depth of needs, core is clamped by cohesion device, while drilling rod
Lift, core is intercepted by pulling force, and core is proposed into ground.
During core is intercepted, equipment need to apply very big pulling force to core just can be blocked core, if core table
Layer is soft, and the core top layer contacted with cohesion device is easily destroyed, and such as runs into ragstone, and section is uncontrollable, fracture
Easily disconnect along rock stratum divisional plane, cause fracture uneven, affect the analysis to stratum, or even cause device damage, shorten and use
Life-span.
Utility model content
For defect of the prior art, this utility model provides a kind of core for geological prospecting and extracts drilling tool, cuts
During coring, pulling force is little, and core fracture is controllable, protects the integrity of core, while preventing device damage, extends and use the longevity
Life.
The core for geological prospecting that this utility model is provided extracts drilling tool, including：Drilling rod, drill bit and ring cutting device,
The drilling rod includes outer tube and the inner core for rotating coaxially connection, and the drill bit is connected to the lower end of the outer tube；The inner core
It is internally formed the cavity for accommodating core, the cavity lower opening, the opening of the cavity is up big and down small conical cavity, institute
State the diameter of the outside diameter of conical cavity more than the cavity upper end, the taper intracavity is coaxially arranged with hold-fast ring, described armful
The periphery wall of tight ring is also the conical surface, is adapted to the cavity wall of the conical cavity, and it is convex that the internal perisporium of the hold-fast ring is provided with multiple ring-types
Rib；The ring cutting device is arranged between the lower surface of the upper surface of the drill bit and the inner core, and the ring cutting device includes
Circular cutter and the mounting seat for arranging the circular cutter, the circular cutter and the mounting seat are ring-type, the mounting seat
It is fixedly connected with the outer tube, the inwall of the mounting seat is the up big and down small conical surface, and the periphery wall of the circular cutter is also cone
Face, is adapted to the inwall of the mounting seat, and the circular cutter includes rubber friction portion and is arranged on the rubber friction subordinate end
Cutting part, the internal diameter of the internal diameter in the rubber friction portion more than the cutting part, the internal diameter of the cutting part are more than described armful
The internal diameter of tight ring.
Further, the internal perisporium in the rubber friction portion is also equipped with circular fin.
Further, the upper surface of the mounting seat is provided with ball with the lower surface of the inner core.
Further, also including adaptor, the upper end of the adaptor is threadedly coupled with the outer tube, and lower end passes through bearing
Rotate with the upper end of the inner core and be connected.
Further, the adaptor includes：First adaptor and the second adaptor, the lower end of the first adaptor are provided with interior
Screw thread, the upper end of the second adaptor are provided with external screw thread, and second adaptor is threaded in the lower section of first adaptor,
Rotated by bearing between second adaptor and the inner core and connected.
Further, slurry channel is formed between the inner core and the outer tube, the upper end of the adaptor is provided with first
Mud hole, for connecting with mud tube, the perisporium of the adaptor is provided with the second mud hole, the first mud hole and described
Two mud holes connect, and the second mud hole is connected with the slurry channel.
Further, the mounting seat is provided with Lou mud passage.
Further, the inside of the inner core and the adaptor is provided with relief passage, and the switching along axis
The check valve for allowing that direction turns on from top to bottom is provided with the relief passage of head.
Further, the lower surface of the cutting part of the hold-fast ring and the ring cutting device is all big top and small bottom interior
The conical surface.
The core that this utility model is provided extracts drilling rod, drill bit and the ring cutting device of drilling tool, and drilling rod includes inner core and outer tube,
And inner core can be freely rotated relative to outer tube, the internal diameter in the rubber friction portion of the ring cutting device is more than the internal diameter of the cutting part,
The internal diameter of the cutting part is more than the internal diameter of the hold-fast ring, and hold-fast ring is with mounting seat with conical cavity and circular cutter
Cone match.When ring cutting drill bit feeds, outer tube is rotated, and inner core do not turn, and is centrally formed column core in drill bit, and core is pushed up upwards
Enter in the cavity of inner core, when reaching the default amount of feeding, drilling tool is lifted up, as the internal diameter in rubber friction portion is minimum, rubbing
In the presence of wiping power, ring cutting device is moved down, and in the presence of the conical surface, ring cutting device inwardly compresses, frictional force increase, while
Rubber friction portion further compresses, cutting part and core rod touch, and cutting part is rotated with outer tube, carries out ring cutting to core, in core
Circumferential form ring cutting groove；Drilling tool lifts further up, and hold-fast ring is contacted with core, by downward frictional force, in the same manner,
Inwardly compress in the presence of the conical surface, further increasing friction force, hold core tightly, and be firmly lifted up；Due in ring cutting groove portion
The structural strength of core is most weak, and core ruptures along ring cutting groove, forms opposed flattened otch.
The core for geological prospecting that this utility model is provided extracts drilling tool, beforehand through ring cutting device under core
End forms ring cutting groove, reduces structural strength of the core at ring cutting groove, reduces pulling force when intercepting core, and core is along ring cutting
Groove ruptures, and fracture is controllable, protects the integrity of core, while preventing device damage, extends service life.
Description of the drawings
In order to be illustrated more clearly that this utility model specific embodiment or technical scheme of the prior art, below will be right
Needed for specific embodiment or description of the prior art, accompanying drawing to be used is briefly described.In all of the figs, it is similar
Element or part are typically identified by similar reference.In accompanying drawing, each element or part might not be according to actual ratios
Draw.
Fig. 1 extracts the structural representation of drilling tool for the core that an embodiment is provided；
Partial enlargement A views of the Fig. 2 for Fig. 1；
Fig. 3 extracts the structural representation of adaptor in drilling tool for the core that an embodiment is provided.
Description of reference numerals：
100th, drilling rod 200, drill bit 300, ring cutting device
110th, outer tube 120, inner core 410, hold-fast ring
320th, mounting seat 311, rubber friction portion 312, cutting part
420th, ball 510, the first adaptor 520, the second adaptor
530th, bearing 540, block 610, slurry channel
620th, the first mud hole 630, the second mud hole 640, leakage mud passage
650th, mud tube 710, relief passage 720, check valve
Specific embodiment
The embodiment of technical solutions of the utility model is described in detail below in conjunction with accompanying drawing.Following examples are only
For clearly illustrating the technical solution of the utility model, therefore example is only used as, and this practicality can not be limited with this
New protection domain.
It should be noted that unless otherwise stated, technical term used in this application or scientific terminology should be this reality
The ordinary meaning understood with new one of ordinary skill in the art.
Referring to figs. 1 to Fig. 3, in one embodiment, the core for geological prospecting that this utility model is provided extracts drilling tool,
Including：Drilling rod 100, drill bit 200 and ring cutting device 300, the drilling rod 100 include outer tube 110 and the inner core for rotating coaxially connection
120, the drill bit 200 is connected to the lower end of the outer tube 110；The cavity for being internally formed receiving core of the inner core 120, institute
Cavity lower opening is stated, the opening of the cavity is up big and down small conical cavity, and the outside diameter of the conical cavity is more than institute
The diameter of cavity is stated, the taper intracavity is coaxially arranged with hold-fast ring 410, and the periphery wall of the hold-fast ring 410 is also the conical surface, with
The cavity wall adaptation of the conical cavity, the internal perisporium of the hold-fast ring 410 are provided with multiple circular fins；The ring cutting device 300 sets
Put between the lower surface of the upper surface of the drill bit 200 and the inner core 120, the ring cutting device 300 include circular cutter and
For arranging the mounting seat 320 of the circular cutter, the circular cutter and the mounting seat 320 are ring-type, the mounting seat 320
It is fixedly connected with the outer tube 110, the inwall of the mounting seat 320 is the up big and down small conical surface, the periphery wall of the circular cutter
Also it is the conical surface, is adapted to the inwall of the mounting seat 320, the circular cutter includes rubber friction portion 311 and is arranged on the rubber
The cutting part 312 of 311 lower end of glue friction portion, the internal diameter in the rubber friction portion 311 are more than the internal diameter of the cutting part 312, institute
State the internal diameter of the internal diameter more than the hold-fast ring 410 of cutting part 312.
It is as follows that the core that the present embodiment is provided extracts drilling tool operation principle：When ring cutting drill bit 200 feeds, outer tube 110 is rotated,
Inner core 120 does not turn, and is centrally formed column core in drill bit 200, and core is headed in the cavity of inner core 120 upwards, is reached default
The amount of feeding when, drilling tool is lifted up, due to the internal diameter in rubber friction portion 311 it is minimum, in the presence of frictional force, ring cutting device
300 move down, and in the presence of the conical surface, ring cutting device 300 inwardly compresses, frictional force increase, while rubber friction portion 311 is entered
The compression of one step, cutting part 312 and core rod touch, cutting part 312 are rotated with outer tube 110, carry out ring cutting to core, in the week of core
To formation ring cutting groove；Drilling tool lifts further up, and hold-fast ring 410 is contacted with core, by downward frictional force, hold-fast ring
Circular fin on 410 can strengthen frictional force, in the same manner, inwardly compress in the presence of the conical surface, further increasing friction force, hold tightly
Core, and be firmly lifted up；As the structural strength in ring cutting groove portion core is most weak, core ruptures along ring cutting groove, forms phase
To smooth otch.
When the core of the present embodiment extracts drilling tool intercepting core, formed in the lower end of core beforehand through ring cutting device 300
Ring cutting groove, reduces structural strength of the core at ring cutting groove, reduces pulling force when intercepting core, and core is disconnected along ring cutting groove
Split, fracture is controllable, protect the integrity of core, while preventing device damage, extend service life.
Further, in order to increase the frictional force between rubber friction portion 311 and core, the rubber friction portion 311
Internal perisporium is also equipped with circular fin.As, during cut-out, mounting seat 320 is rotated, and inner core 120 does not turn, in order to reduce mounting seat 320
With the frictional force between inner core 120, the upper surface of the mounting seat 320 is provided with ball with the lower surface of the inner core 120
420。
Specifically, in order that free to rotate between inner core 120 and outer tube 110, the core of the present embodiment extracts drilling tool, bag
Adaptor is included, the upper end of the adaptor is threadedly coupled with the outer tube 110, lower end passes through bearing 530 and the inner core 120
Upper end rotates connection, and in the presence of bearing 530, inner core 120 is free to rotate.
Wherein, as inner core 120 is stuck on bearing 530, for the ease of assembling, the adaptor includes：First adaptor
510 and second adaptor 520, the lower end of the first adaptor 510 is provided with female thread, and the upper end of the second adaptor 520 is provided with outer spiral shell
Stricture of vagina, second adaptor 520 are threaded in the lower section of first adaptor 510, in 520 upper end of the second adaptor
A bearing 530 is respectively equipped with lower end.During installation, the upper end of inner core 120 is passed through into bearing 530 first, and in 530 upper end of bearing
Block 540 is set, and block 540 is threaded connection and is fixedly installed on inner core 120, certainly can also for pin joint, clamping etc. its
His mode, so that inner core 120 is suspended in outer tube 110.
Further, drilling tool is usually provided with slurry channel 610, and the pressure of mud is big, and impulsive force is strong, in order to prevent mud
Slurry is directly acted on to core, destroys core, and slurry channel 610 is formed between the inner core 120 and the outer tube 110, described
The upper end of adaptor is provided with the first mud hole 620, and for connecting with mud tube 650, the perisporium of the adaptor is provided with the second mud
Slurry hole 630, the first mud hole 620 connected with the second mud hole 630, the second mud hole 630 and the mud
Passage 610 is connected, so that mud is separated with core, protects core not sustain damage.
Specifically, the mounting seat 320 is provided with Lou mud passage 640, and leakage mud passage 640 connects slurry channel 610 and bores
In 200.
The core of the present embodiment extracts drilling tool and is additionally provided with decompressor, specifically, the inner core 120 and the adaptor
Inside axis is provided with relief passage 710, and in the relief passage 710 of the adaptor, be provided with permission side from top to bottom
To the check valve 720 of conducting.When core heads into cavity upwards, cavity opposing seal, intracavity air pressure are raised, and are unfavorable for that core enters
Enter, increased resistance, therefore, axis is provided with relief passage 710 in the inside of the inner core 120 and the adaptor,
When intracavity air pressure is raised, gas is discharged along relief passage 710, is reduced air pressure, core is smoothly entered, meanwhile, in order to prevent mud
Slurry is provided with the check valve 720 for allowing that direction turns on from top to bottom in the relief passage 710 of adaptor into relief passage 710.
Further, when drilling tool feeds, in order to prevent the stuck drilling tool in the lower end of ring cutting device 300 and hold-fast ring 410,
The lower surface of the cutting part 312 of the hold-fast ring 410 and the ring cutting device 300 is all big top and small bottom inner conical surface, is led to
Cross the conical surface to be oriented to core, while outwards strutting hold-fast ring 410 and ring cutting device 300, make core smoothly enter cavity.
In the description of the present application, it is to be understood that term " on ", D score, "front", "rear", "left", "right", " water
It is flat ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, merely to just
In description this utility model and simplified description, rather than indicate or imply that the device or element of indication there must be specifically side
Position, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.
Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating or implying relatively important
Property or the implicit quantity for indicating indicated technical characteristic.In description of the present utility model, " multiple " are meant that two
More than, unless otherwise expressly limited specifically.
In description of the present utility model, a large amount of details are illustrated.It is to be appreciated, however, that reality of the present utility model
Apply example to put into practice in the case where there is no these details.In some instances, known method, knot is not been shown in detail
Structure and technology, so as not to obscure the understanding of this description.
In the description of this specification, specific features, structure, material or feature can be in any one or more embodiments
Or combined in example in an appropriate manner.Additionally, in the case of not conflicting, this can be said by those skilled in the art
The feature of different embodiments or example and different embodiments or example described in bright book is combined and combines.
Finally it should be noted that：Various embodiments above is only illustrating the technical solution of the utility model, rather than which is limited
System；Although being described in detail to this utility model with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：Which still can be modified to the technical scheme described in foregoing embodiments, or to which part or whole
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 each embodiment technical scheme of type, which all should be covered in the middle of the scope of claim of the present utility model and description.
Claims (9)
1. a kind of core for geological prospecting extracts drilling tool, it is characterised in that include：Drilling rod, drill bit and ring cutting device, it is described
Drilling rod includes outer tube and the inner core for rotating coaxially connection, and the drill bit is connected to the lower end of the outer tube；The inside of the inner core
Form the cavity for accommodating core, the cavity lower ending opening, the opening of the cavity is up big and down small conical cavity, the cone
Upper end diameter of the outside diameter in shape chamber more than the cavity, the taper intracavity are coaxially arranged with hold-fast ring, the hold-fast ring
Periphery wall also be the conical surface, be adapted to the cavity wall of the conical cavity, the internal perisporium of the hold-fast ring is provided with multiple circular fins；Institute
State ring cutting device to be arranged between the upper surface of the drill bit and the lower surface of the inner core, the ring cutting device includes circular cutter
With for arranging the mounting seat of the circular cutter, the circular cutter and the mounting seat are ring-type, the mounting seat with it is described
Outer tube is fixedly connected, and the inwall of the mounting seat is the up big and down small conical surface, and the periphery wall of the circular cutter is also the conical surface, with institute
The inwall adaptation of mounting seat is stated, the circular cutter includes rubber friction portion and is arranged on the cutting at the rubber friction subordinate end
Portion, the internal diameter in the rubber friction portion are more than the internal diameter of the cutting part, and the internal diameter of the cutting part is more than the hold-fast ring
Internal diameter.
2. the core for geological prospecting according to claim 1 extracts drilling tool, it is characterised in that the rubber friction portion
Internal perisporium be also equipped with circular fin.
3. the core for geological prospecting according to claim 1 extracts drilling tool, it is characterised in that the mounting seat it is upper
End face is provided with ball with the lower surface of the inner core.
4. the core for geological prospecting according to claim 1 extracts drilling tool, it is characterised in that also including adaptor,
The upper end of the adaptor is threadedly coupled with the outer tube, and lower end is rotated with the upper end of the inner core by bearing and is connected.
5. the core for geological prospecting according to claim 4 extracts drilling tool, it is characterised in that the adaptor bag
Include：First adaptor and the second adaptor, the lower end of the first adaptor are provided with female thread, and the upper end of the second adaptor is provided with outer spiral shell
Stricture of vagina, second adaptor are threaded in the lower section of first adaptor, between second adaptor and the inner core
Rotated by bearing and connected.
6. the core for geological prospecting according to claim 4 extracts drilling tool, it is characterised in that the inner core and described
Slurry channel is formed between outer tube, the upper end of the adaptor is provided with the first mud hole, for connecting with mud tube, the switching
The perisporium of head is provided with the second mud hole, and the first mud hole is connected with the second mud hole, the second mud hole and institute
State slurry channel connection.
7. the core for geological prospecting according to claim 6 extracts drilling tool, it is characterised in that set in the mounting seat
There is leakage mud passage.
8. the core for geological prospecting according to claim 7 extracts drilling tool, it is characterised in that the inner core and described
The inside of adaptor is provided with relief passage, and the relief passage of the adaptor along axis and is provided with permission side from top to bottom
To the check valve of conducting.
9. the core for geological prospecting according to claim 8 extracts drilling tool, it is characterised in that the hold-fast ring and institute
The inwall lower end for stating the cutting part of ring cutting device is big top and small bottom inner conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621158621.3U CN206158642U (en) | 2016-10-24 | 2016-10-24 | A core draws drilling tool for prospecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621158621.3U CN206158642U (en) | 2016-10-24 | 2016-10-24 | A core draws drilling tool for prospecting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206158642U true CN206158642U (en) | 2017-05-10 |
Family
ID=58655974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621158621.3U Expired - Fee Related CN206158642U (en) | 2016-10-24 | 2016-10-24 | A core draws drilling tool for prospecting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206158642U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518183A (en) * | 2018-03-14 | 2018-09-11 | 中国石油大学(华东) | A kind of un-densified rock field sampling drill bit preventing rock sample fragmentation |
| CN108756754A (en) * | 2018-04-16 | 2018-11-06 | 中国地质大学（武汉） | A kind of column core drills through target drill |
| CN109025877A (en) * | 2018-09-06 | 2018-12-18 | 中国海洋石油集团有限公司 | A kind of storage heart cylinder |
| CN109403899A (en) * | 2018-11-08 | 2019-03-01 | 深圳大学 | Core drilling rig drive system |
| CN109406204A (en) * | 2018-12-31 | 2019-03-01 | 胡楠 | Frangible formation sample acquires jackrod structure |
| CN111322025A (en) * | 2020-02-22 | 2020-06-23 | 深圳大学 | Moon self-tunneling coring robot device and system |
| CN111595612A (en) * | 2020-05-30 | 2020-08-28 | 宁波新城建筑设计有限公司 | Soil layer sampling device for geological exploration and exploration method |
| CN113176110A (en) * | 2020-08-26 | 2021-07-27 | 陈苗苗 | Highway quality testing gets core machine with type of cuting |
| CN114837591A (en) * | 2022-06-20 | 2022-08-02 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Rock core extracting drilling tool for geological exploration |
| CN115356149A (en) * | 2022-07-01 | 2022-11-18 | 山东嘉勘工程勘察有限公司 | Can prevent water conservancy project ring geology investigation sampling equipment that sample dropped |
-
2016
- 2016-10-24 CN CN201621158621.3U patent/CN206158642U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518183A (en) * | 2018-03-14 | 2018-09-11 | 中国石油大学(华东) | A kind of un-densified rock field sampling drill bit preventing rock sample fragmentation |
| CN108756754A (en) * | 2018-04-16 | 2018-11-06 | 中国地质大学（武汉） | A kind of column core drills through target drill |
| CN109025877A (en) * | 2018-09-06 | 2018-12-18 | 中国海洋石油集团有限公司 | A kind of storage heart cylinder |
| CN109403899B (en) * | 2018-11-08 | 2023-12-08 | 深圳大学 | Coring drilling machine driving system |
| CN109403899A (en) * | 2018-11-08 | 2019-03-01 | 深圳大学 | Core drilling rig drive system |
| CN109406204A (en) * | 2018-12-31 | 2019-03-01 | 胡楠 | Frangible formation sample acquires jackrod structure |
| CN109406204B (en) * | 2018-12-31 | 2021-09-21 | 胡楠 | Fragile rock stratum sample collection drill rod structure |
| CN111322025A (en) * | 2020-02-22 | 2020-06-23 | 深圳大学 | Moon self-tunneling coring robot device and system |
| CN111322025B (en) * | 2020-02-22 | 2024-05-17 | 深圳大学 | Moon is from tunnelling coring robot device and system |
| CN111595612A (en) * | 2020-05-30 | 2020-08-28 | 宁波新城建筑设计有限公司 | Soil layer sampling device for geological exploration and exploration method |
| CN111595612B (en) * | 2020-05-30 | 2023-02-07 | 宁波新城建筑设计有限公司 | Soil layer sampling device for geological exploration and exploration method |
| CN113176110A (en) * | 2020-08-26 | 2021-07-27 | 陈苗苗 | Highway quality testing gets core machine with type of cuting |
| CN114837591A (en) * | 2022-06-20 | 2022-08-02 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Rock core extracting drilling tool for geological exploration |
| CN114837591B (en) * | 2022-06-20 | 2024-04-19 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | Core extraction drilling tool for geological exploration |
| CN115356149A (en) * | 2022-07-01 | 2022-11-18 | 山东嘉勘工程勘察有限公司 | Can prevent water conservancy project ring geology investigation sampling equipment that sample dropped |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20211024 |
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| CF01 | Termination of patent right due to non-payment of annual fee |