CN104265225B - It is applied to the salvaging anchor and overshot of wire line core drilling - Google Patents
It is applied to the salvaging anchor and overshot of wire line core drilling Download PDFInfo
- Publication number
- CN104265225B CN104265225B CN201410473445.1A CN201410473445A CN104265225B CN 104265225 B CN104265225 B CN 104265225B CN 201410473445 A CN201410473445 A CN 201410473445A CN 104265225 B CN104265225 B CN 104265225B
- Authority
- CN
- China
- Prior art keywords
- slips
- mandrel
- anchor
- wire line
- guiding cap
- 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
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/20—Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
Abstract
The present invention provides a kind of salvaging anchor and overshot for being applied to wire line core drilling, it is related to geological processing machinery field, the salvaging anchor for being wherein applied to wire line core drilling includes mandrel, slips and guiding cap, guiding cap is located at one end of mandrel, guiding cap is connected with mandrel thread, the other end of mandrel is provided with the screw thread coordinated with other drilling tools, the middle part of mandrel is in round table-like, the side away from guiding cap at the middle part of mandrel is big end, the middle part outside of mandrel is provided with external screw thread, slips is elastic pipe sleeve that cross section is " C " shape, slips inner side is provided with the internal thread coordinated with the external screw thread at middle part, slips is set in the outside at the middle part of mandrel, it is raised that slips outside is provided with first.The beneficial effect of the salvagings anchor and overshot that are applied to wire line core drilling that the present invention is provided is convenient to use, can salvage anchor and reclaim, it is to avoid the generation of second accident is while save cost.
Description
Technical field
The present invention relates to geological processing machinery field, in particular to a kind of salvaging for being applied to wire line core drilling
Anchor and overshot.
Background technology
During engineering investigation drilling construction, often there is drilling tool and fracture accident, the drilling tool fractureed in drilling is claimed
It is fish, fish is generally tubulose, it is general to be salvaged using screw tap, screw tap is put into drilling and shot in the drilling tool for fractureing, then
Above carry screw tap and reach the purpose for salvaging fish.
But there are two shortcomings in the method：1st, because the screw thread that screw tap shoots drilling tool can wear and tear or collapse tooth, screw tap is general only
Be able to will be scrapped using 1-4 times, replacement cost is high；2nd, after screw tap shoots the drilling tool for fractureing, if what the drilling tool for fractureing was subject to
Resistance is too big, it is impossible to smoothly rises and pulls out, and now because the somewhere screw thread above screw tap is whirlpooled down, reversion screw tap can not make screw tap from fractureing
Drilling tool in exit, make to be retained in the drilling tool in hole and increase, trigger secondary accident, accident is further deteriorated.
The content of the invention
It is above-mentioned to solve it is an object of the invention to provide a kind of salvaging anchor and overshot for being applied to wire line core drilling
Problem.
The salvaging anchor for being applied to wire line core drilling of present invention offer includes mandrel, slips and guiding cap, the guiding
Cap is located at one end of the mandrel, and the guiding cap is connected with the mandrel thread, the other end of the mandrel be provided with for
The screw thread that other drilling tools coordinate, the middle part of the mandrel in round table-like, the middle part of the mandrel away from the one of the guiding cap
Side is big end, and the middle part outside of the mandrel is provided with external screw thread, and the slips is the elastic pipe sleeve that cross section is " C " shape, described
Slips inner side is provided with the internal thread coordinated with the external screw thread at the middle part, and the slips is set in the outer of the middle part of the mandrel
Side, the slips outside is provided with projection.
The above-described salvaging anchor for being applied to wire line core drilling, it is preferable that the projection is annular protrusion, convex annular
Rise after being engaged with fish inside, be tightly combined, frictional force is big, is not readily disengaged from when lifting.
The above-described salvaging anchor for being applied to wire line core drilling, it is preferable that the slips is in round table-like, the slips
It is small end near the side of the guiding cap.Slips, in round table-like, is small end near the side of guiding cap, and the slips of small end is more
Easily it extend into the inside of fish, it is to avoid slips is not extended into also and is just stuck in outside fish.
The above-described salvaging anchor for being applied to wire line core drilling, it is preferable that also including stage clip, the stage clip is set in
Outside the mandrel, described stage clip one end is fixed on the one end of the mandrel away from the guiding cap, the stage clip other end and institute
State one end connection away from the guiding cap of slips.Stage clip extrudes slips, and slips is extruded near one end of guiding cap, this
Sample avoid slips on mandrel slidably, slips automatic homing can be allowed, convenient operation.
The above-described salvaging anchor for being applied to wire line core drilling, it is preferable that also including sleeve, the sleeve is set in
Slips outside, is provided with second raised in the sleeve, the sleeve and the slips gap coordinate, the sleeve with it is described
One end away from the guiding cap of mandrel is fixedly connected.When fish is salvaged, sleeve is enclosed within the outside of fish, and slips is from fish
Inner extrusion fish, coordinates with sleeve and clamps fish, and so gripping to fish is more stablized and firm.
The above-described salvaging anchor for being applied to wire line core drilling, it is preferable that the external screw thread at the middle part of the mandrel is
Left hand thread.Using left hand thread, salvage anchor preferably can cooperate with general drilling tool, improved using electrodrill and beaten
The efficiency dragged for.
The above-described salvaging anchor for being applied to wire line core drilling, it is preferable that also including pad, the pad is set in
On the mandrel, it is arranged between the slips and the guiding cap.Pad can buffer impact and band of the slips to guiding cap
Action-oriented cap is rotated, it is to avoid the whereabouts of guiding cap.
The above-described salvaging anchor for being applied to wire line core drilling, it is preferable that the slips is spring steel slips.Spring
The slips that steel makes has excellent elasticity and yield limit, it is possible to increase the service life of slips and the buckle intensity of slips.
Present invention also offers a kind of overshot for being applied to wire line core drilling,
By the above-described salvaging anchor and BHA for being applied to wire line core drilling；
Anchor will be salvaged to stretch into drilling, transferred to the position of fish, anchored into fish until salvaging；
Edge makes slips away from the direction rotary tools of guiding cap；
Propose to salvage anchor, fish up upwards；If can not carry salvaging anchor, anchor will be salvaged and extended downwardly into, then edge will make
Slips near guiding cap direction rotary tools, then upwards propose salvage anchor.
Can realize that stabilization rapidly proposes fish to drill using this overshot, when can not carry fish, instead
Anchor and fish just can will be salvaged to rotary tools to separate, then will salvage anchor and proposed, it is to avoid the generation of second accident, while reclaiming
Anchor is salvaged, construction cost is saved.
Above-described a kind of overshot for being applied to wire line core drilling, it is preferable that keep mandrel to be subject to tension.
The beneficial effect of the salvaging anchor and overshot that are applied to wire line core drilling that the present invention is provided is, by round platform
It is arranged a slips outside the middle part of shape, round table-like middle part outside is provided with external screw thread, is provided with slips in coordinate with external screw thread
Screw thread, when mandrel rotates, slips and mandrel are relatively moved, and slips is moved at the big end at the middle part of mandrel, by slips
Strut, the projection on the outside of slips can just be embedded in the inner side of fish, fish is tightly combined with anchor is salvaged, propose that salvaging anchor just may be used
Fish is taken out, if can not propose to salvage anchor, mandrel is just reversely rotated, slips is moved to the small end of mandrel in the presence of screw thread coordinates
Move, under slips elastic reaction, slips draws in, is separated with fish, then anchor will be salvaged and propose that recovery just may be used.It is convenient to use,
Anchor can be salvaged to reclaim, it is to avoid the generation of second accident saves cost simultaneously.
Brief description of the drawings
Fig. 1 is the schematic diagram of the salvaging anchor for being applied to wire line core drilling that first embodiment of the invention is provided；
Fig. 2 is the axonometric schematic diagram of the slips of the salvaging anchor for being applied to wire line core drilling shown in Fig. 1；
Fig. 3 is the schematic diagram of the mandrel of the salvaging anchor for being applied to wire line core drilling shown in Fig. 1；
Fig. 4 is the principal section schematic diagram of the salvaging anchor for being applied to wire line core drilling that second embodiment of the invention is provided；
Fig. 5 is the principal section schematic diagram of the salvaging anchor for being applied to wire line core drilling that third embodiment of the invention is provided.
Specific embodiment
The present invention is described in further detail below by specific embodiment and with reference to accompanying drawing.
Fig. 1 is the schematic diagram of the salvaging anchor for being applied to wire line core drilling that first embodiment of the invention is provided；Fig. 2 is figure
The axonometric schematic diagram of the slips of the salvaging anchor for being applied to wire line core drilling shown in 1；Fig. 3 is to be applied to rope shown in Fig. 1
The schematic diagram of the mandrel of the salvaging anchor of core-drilling.As Figure 1-3, the rope that is applied to that first embodiment of the invention is provided takes
The salvaging anchor of heart drilling includes mandrel 101, slips 102 and guiding cap 103, and guiding cap 103 is located at one end of mandrel 101, is oriented to
Cap 103 is threadedly coupled with mandrel 101, and the other end of mandrel 101 is provided with the screw thread coordinated with other drilling tools, the middle part of mandrel 101
In round table-like, the side away from guiding cap 103 at the middle part of mandrel 101 is big end, and the middle part outside of mandrel 101 is provided with external screw thread
105, slips 102 is the elastic pipe sleeve that cross section is " C " shape, and the inner side of slips 102 is provided with the cooperation of external screw thread 105 with middle part
Screw thread 106, slips 102 is set in the outside at the middle part of mandrel 101, and the outside of slips 102 is provided with the first projection 104.
The slips 102 of the elastic pipe sleeve of " C " shape is set in the middle part of mandrel 101, preferably spring steel slips.Spring steel
The slips 102 of work can improve the service life and slips 102 and mandrel of slips 102 with excellent elasticity and yield limit
101 are tightly combined degree, the inner side of slips 102 is tightly fitted in the middle part of mandrel 101.One end of mandrel 101 and guiding
Cap 103 is connected, and the external diameter of guiding cap 103 is slightly less than the external diameter of slips 102, and the one side of guiding cap 103 can guide salvaging to anchor into
Enter in fish, on the one hand block slips 102, limit the displacement of slips 102, slips 102 is moved to guiding cap downwards
At 103.
Because the middle part that mandrel 101 and slips 102 coordinate is in round table-like, the taper of round platform can choose 1:100-200, it is excellent
Elect 1 as:130.Meanwhile, the small end of round platform salvages anchor before the use near one end of guiding cap 103, first rotates slips 102
To at guiding cap 103, because the round platform at guiding cap 103 is small end, slips 102 shrinks under natural resiliency effect, card
Watts 102 external diameter diminishes.Anchor will be salvaged to put down, extend into the fish of tubulose.Rotary core shaft 101 again, make slips 102 to away from
The direction movement of guiding cap 103, defines rotating to be for this direction and rotates forward.The external screw thread 105 and slips at the middle part of mandrel 101
102 internal thread 106 is cooperated, and because slips 102 is contacted with the inwall of fish, slips 102 will not be rotated, mandrel
101 just advance downwards, and so, slips 102 just slowly slides into the big end at the middle part of mandrel 101, and big end struts slips 102,
The external diameter of slips 102 becomes big, and the first projection 104 of slips 102 is embedded into the inwall of fish, salvaging anchor is tightly tied with fish
Close, at this moment above carrying salvaging anchor just can realize salvaging fish from drilling to come；If can not propose to salvage anchor and fish, just need
Mandrel 101 is reversely rotated, slips 102 is coordinated by screw thread and is slided into small end, slips 102 shrinks, and the external diameter of slips 102 subtracts
It is small, depart from fish, propose to salvage anchor, anchor will be salvaged and reclaimed.
Only slips 102 is consumable accessory in salvaging anchor, and replacement cost is low.Slips 102 can be made by rotary core shaft 101 simultaneously
Distending or contraction, make slips 102 just can be increased or reduced by rotary core shaft 101 with the frictional force of fish, can effectively control
The frictional force for pulling, it is to avoid the further deterioration of accident.
Fig. 4 is the principal section schematic diagram of the salvaging anchor for being applied to wire line core drilling that second embodiment of the invention is provided.
As shown in figure 4, the salvaging anchor for being applied to wire line core drilling that second embodiment of the invention is provided is the base in first embodiment
On plinth, first raised 104 is preferably a plurality of annular protrusion, and annular protrusion is similar to ring screw, after when 102 distending of slips with fall
The occlusion of fish inside, is tightly combined, and frictional force is big, is not easy to slip when lifting.
Further, slips 102 is in round table-like, and slips 102 is small end near the side of guiding cap 103.Slips 102 is in circle
Mesa-shaped and be small end near one end of guiding cap 103, the slips 102 of small end is small due to external diameter, is more prone to extend into fish
It is internal, it is to avoid to be not easily accessed in fish because the external diameter of slips 102 is bigger.The screw thread coordinated with slips 102 on mandrel 101
It is left hand thread, preferably zigzag left hand thread, this screw thread is good to the transmission effect of power, can bear larger load,
Simultaneously as most electrodrill is for left-handed, so combined with the mandrel 101 of salvaging anchor using electrodrill, make left-handed be
The dextrorotation direction of mandrel 101, left-handed mandrel 101 just can will salvage anchor and fish is fixed, and speed is salvaged than handmade rotary mandrel 101
Hurry up, efficiency high.
The salvaging anchor that the present embodiment is provided also includes pad 107, and pad 107 is set on mandrel 101, is arranged in slips
Between 102 and guiding cap 103, the external diameter of pad 107 is identical with the external diameter of guiding cap 103, between pad 107 and guiding cap 103
With certain spacing.Slips 102 is withstood on pad 107, and when slips 102 rotates, only band mobile gasket 107 rotates, and can subtract
The impact of guiding cap 103 and drive guiding cap 103 are rotated when few slips 102 and mandrel 101 are rotated against, it is to avoid be oriented to
Cap 103 departs from mandrel 101.
Fig. 5 is the principal section schematic diagram of the salvaging anchor for being applied to wire line core drilling that third embodiment of the invention is provided.
As shown in figure 5, the salvaging anchor for being applied to wire line core drilling that third embodiment of the invention is provided is in first embodiment and the
On the basis of two embodiments, further, also including stage clip 108, stage clip 108 is set in outside mandrel 101, and the one end of stage clip 108 is consolidated
The one end of mandrel 101 away from guiding cap 103 is scheduled on, the other end of stage clip 108 connects with one end away from guiding cap 103 of slips 102
Connect.When being usually not used, be expressed to slips 102 near one end of guiding cap 103 by stage clip 108, makes the automatic homing of slips 102,
In use, the extruding of stage clip 108 slips 102, makes the external screw thread 105 of the internal thread 106 of slips 102 and mandrel 101 tight
Laminating, it is to avoid dally, improve salvaging efficiency.
Sleeve 109, the external diameter of the internal diameter slightly larger than the fish of tubulose of sleeve 109, sleeve are also arranged with the outside of slips 102
109 and the gap of slips 102 coordinate, sleeve 109 is fixedly connected with one end away from guiding cap 103 of mandrel 101, in sleeve 109
Multiple second projections 110 are inside additionally provided with, when salvaging fish, the first projection 104 of slips 102 stretches into the inwall in fish with fish
Laminating, and sleeve 109 is then enclosed within the outside of fish, second raised 110 fits with the outer wall of fish, the second projection 110 and slips
Coordinate in the first of 102 raised 104 is outer, realize more firm and stabilization the clamping crawl to the tube wall of fish.
Fourth embodiment of the invention provides a kind of overshot for being applied to wire line core drilling, including：
The salvaging anchor and BHA that are applied to wire line core drilling that above example is provided are installed, drilling tool can be
Drilling rod, in one end screw-in drilling rod by mandrel 101 away from guiding cap 103, fixation is connected through a screw thread by mandrel 101 and drilling rod；
Anchor will be salvaged to extend into drilling, transferred to the position of fish, anchored into fish until salvaging, halted；
Rotated along making slips 102 come rotary drill rod band moving mandrel 101 away from the direction of guiding cap 103, define this rotation
To rotate forward, at this moment, in the presence of screw thread cooperation, slips 102 is with respect to the upward sliding of mandrel 101, and slips 102 is swollen in direction
Open, slips 102 is brought into close contact with fish, coordinate the first projection 104 by fish stuck fast.
Salvaging anchor is above carried, fish and salvaging anchor are together proposed into drilling, just will salvaged anchor and propose to drill, fish is salvaged
Come；If salvage anchor can not propose, anchor will be salvaged and first extended downwardly into, it is ensured that slips 102 will be adjacent to fish, and then edge makes slips
The 102 direction rotary tools for being close to guiding cap 103, define this and rotate to be reverse rotation, and band moving mandrel 101 rotates together with,
In the presence of mandrel 101 coordinates with the screw thread of slips 102, mandrel 101 is moved upwards with respect to slips 102, and slips 102 is to mandrel
The small end movement at 101 middle parts, slips 102 shrinks, and the external diameter of slips 102 diminishes, and slips 102 and fish inner side depart from, finally, then
The related slips 102 of mandrel 101 is together proposed upwards, is reclaimed and is salvaged anchor.
Should all keep mandrel 101 to be subject to tension during whole operation, the He of slips 102 can be improved using tension
The adhesion of mandrel 101, it is to avoid the phenomenon for slipping occur in slips 102 and mandrel 101.
Using this overshot can quickly and easily fish up, when fish up is unable to, by reversely rotation
Core axle 101, makes slips 102 depart from fish, just can be taken off salvaging anchor, salvage the recovery of anchor, it is to avoid second accident
There is and salvage the waste of anchor, save construction cost.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of salvaging anchor for being applied to wire line core drilling, it is characterised in that described to lead including mandrel, slips and guiding cap
One end of the mandrel is located to cap, the guiding cap is connected with the mandrel thread, the other end of the mandrel be provided with for
The screw thread coordinated with other drilling tools, the middle part of the mandrel in round table-like, the middle part of the mandrel away from the guiding cap
Side is big end, and the middle part outside of the mandrel is provided with external screw thread, and the slips is the elastic pipe sleeve that cross section is " C " shape, institute
State slips inner side and be provided with the internal thread coordinated with the external screw thread at the middle part, the slips is set in the outer of the middle part of the mandrel
Side, the slips outside is provided with the first projection, and first projection is annular protrusion, and the slips is in round table-like, the slips
It is small end near the side of the guiding cap；The salvaging anchor for being applied to wire line core drilling also includes stage clip, the stage clip
It is set in outside the mandrel, described stage clip one end is fixed on the one end of the mandrel away from the guiding cap, the stage clip is another
End is connected with one end away from the guiding cap of the slips.
2. the salvaging anchor for being applied to wire line core drilling according to claim 1, it is characterised in that also including sleeve, institute
State sleeve and be set in the slips outside, the second projection is provided with the sleeve, the sleeve and the slips gap coordinate, institute
Sleeve is stated to be fixedly connected with one end away from the guiding cap of the mandrel.
3. the salvaging anchor for being applied to wire line core drilling according to claim 1, it is characterised in that the middle part of the mandrel
External screw thread be left hand thread.
4. the salvaging anchor for being applied to wire line core drilling according to claim 1, it is characterised in that also including pad, institute
Pad is stated to be set on the mandrel and be arranged between the slips and the guiding cap.
5. the salvaging anchor for being applied to wire line core drilling according to claim 1, it is characterised in that the slips is spring
Steel slips.
6. a kind of overshot for being applied to wire line core drilling, it is characterised in that
By the salvaging anchor and BHA that are applied to wire line core drilling described in claim 1-5 any one；
Anchor will be salvaged to stretch into drilling, transferred to the position of fish, anchored into fish until salvaging；
Edge makes slips away from the direction rotary tools of guiding cap；
Propose to salvage anchor, fish up upwards；If can not carry salvaging anchor, anchor will be salvaged and extended downwardly into, then edge will make slips
Near the direction rotary tools of guiding cap, then propose to salvage anchor upwards.
7. the overshot for being applied to wire line core drilling according to claim 6, it is characterised in that keep mandrel to be drawn
Stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410473445.1A CN104265225B (en) | 2014-09-16 | 2014-09-16 | It is applied to the salvaging anchor and overshot of wire line core drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410473445.1A CN104265225B (en) | 2014-09-16 | 2014-09-16 | It is applied to the salvaging anchor and overshot of wire line core drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104265225A CN104265225A (en) | 2015-01-07 |
| CN104265225B true CN104265225B (en) | 2017-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410473445.1A Expired - Fee Related CN104265225B (en) | 2014-09-16 | 2014-09-16 | It is applied to the salvaging anchor and overshot of wire line core drilling |
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| CN (1) | CN104265225B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107318732B (en) * | 2017-07-19 | 2020-12-08 | 合肥学院 | Anchor chain system with single-point anchoring net cage with power buffering function |
| CN109516366B (en) * | 2018-12-21 | 2020-10-27 | 诸暨新舜韬科技有限公司 | Steel wire rope stable fishing device for bridge construction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201546652U (en) * | 2009-11-20 | 2010-08-11 | 李志磊 | Complex down-hole fishing tool |
| CN202117605U (en) * | 2011-05-18 | 2012-01-18 | 天津沃克石油机械技术开发有限公司 | Oilfield salvage anchor head |
| CN103470205A (en) * | 2013-09-13 | 2013-12-25 | 中国海洋石油总公司 | Anti-jarring reversing fishing spear |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2752427Y (en) * | 2004-12-29 | 2006-01-18 | 大庆市萨尔图区登峰石油构件厂 | Small dimention high strength returnable fishing spears |
| CN2869293Y (en) * | 2005-11-24 | 2007-02-14 | 辽河石油勘探局 | Clamping-tooth-free oil pipe fishing spear |
| CN202914011U (en) * | 2012-10-31 | 2013-05-01 | 中国石油集团川庆钻探工程有限公司 | Drill grinding locking fishing tool for oil gas well |
| RU135704U1 (en) * | 2013-05-14 | 2013-12-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тюменский государственный нефтегазовый университет" (ТюмГНГУ) | PIPE REMOVAL |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201546652U (en) * | 2009-11-20 | 2010-08-11 | 李志磊 | Complex down-hole fishing tool |
| CN202117605U (en) * | 2011-05-18 | 2012-01-18 | 天津沃克石油机械技术开发有限公司 | Oilfield salvage anchor head |
| CN103470205A (en) * | 2013-09-13 | 2013-12-25 | 中国海洋石油总公司 | Anti-jarring reversing fishing spear |
Non-Patent Citations (1)
| Title |
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| "复合式打捞工具的探讨和研制";兰志刚等;《石油矿场机械》;20091225;第38卷(第12期);第95-97页 * |
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| CN104265225A (en) | 2015-01-07 |
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| CB02 | Change of applicant information |
Address after: 646006 Luzhou province Sichuan City Jiangyang Road No. 20 Applicant after: Sichuan Meidi Jiayuan Industrial Co.,Ltd. Address before: 646006 Luzhou province Sichuan City Jiangyang Road No. 20 Applicant before: SICHUAN NO.135 SURVEY AND DESIGN Co.,Ltd. |
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Granted publication date: 20170630 Termination date: 20210916 |