CN107268669A - Piling jacket construction method, rear piling jacket construction component, jacket of driving piles afterwards afterwards - Google Patents
Piling jacket construction method, rear piling jacket construction component, jacket of driving piles afterwards afterwards Download PDFInfo
- Publication number
- CN107268669A CN107268669A CN201710694171.2A CN201710694171A CN107268669A CN 107268669 A CN107268669 A CN 107268669A CN 201710694171 A CN201710694171 A CN 201710694171A CN 107268669 A CN107268669 A CN 107268669A
- Authority
- CN
- China
- Prior art keywords
- jacket
- jack
- sleeve
- piling
- steel
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
Abstract
The present invention discloses jacket construction method of being driven piles after one kind, rear piling jacket construction component, jacket of driving piles afterwards, be related to offshore wind farm technical field, with solve it is existing after the equipment cost that uses is higher during leveling in piling jacket construction method and the technical problem that can not reuse.Piling jacket construction method, comprises the following steps after of the present invention：Step S00, the supporting leg welding by sleeve and jacket；Step S01, by jack and sleeve weld；Step S1, by technique stake squeeze into sea bed；Step S2, the jacket with jack hung into sea, until the base of jack is seated in the stake top of technique stake；Step S3, the leveling by jack progress jacket；After step S4, leveling are finished, steel-pipe pile is hung to the sleeve of jacket, and steel-pipe pile is squeezed into sea bed；Step S5, jack removed, technique stake is extracted.
Description
Technical field
The present invention relates to offshore wind farm technical field, piling jacket construction method, rear piling are led more particularly to after one kind
Pipe support construction component, jacket of driving piles afterwards.
Background technology
At sea in the construction of wind-powered electricity generation, the cost on Wind turbines basis accounts for the 20%- of marine wind electric field project total cost
30%.Wherein, jacket-type basis is a kind of common base form of offshore wind farm blower foundation.
Specifically, in the prior art, the construction method on rear piling jacket-type basis is that first jacket is hung to sea bed
On, steel-pipe pile is then inserted shoe sleeve, finally steel-pipe pile is driven piles to seabed with pile hammer, the tune of jacket is then carried out
It is flat.
However, present inventor has found, during the leveling of jacket, it usually needs pile chuck and levelling gear
It is high Deng, the clip pile level device cost, and clip pile equipment can not typically reuse, and which adds marine work
Cheng Chengben.
The content of the invention
It is an object of the invention to provide the jacket construction method of being driven piles after one kind, rear piling jacket construction component, after
Drive piles jacket, with solve it is existing after the equipment cost that uses is higher during leveling in piling jacket construction method and can not weigh
The technical problem utilized again.
The present invention provides jacket construction method of being driven piles after one kind, comprises the following steps：Technique stake is squeezed into sea bed；Will
The jacket with jack is hung into sea, until the base of the jack is seated in the stake top of the technique stake；It is logical
Cross the leveling that the jack carries out the jacket；After leveling is finished, steel-pipe pile is hung to the sleeve of the jacket,
And squeeze into the steel-pipe pile in the sea bed；The jack is removed, technique stake is extracted.
Wherein, also comprise the following steps before the step of described " squeezing into technique stake in sea bed "：By the sleeve and institute
State the supporting leg welding of jacket；By the jack and the sleeve weld.
Specifically, the step of described " squeezing into the steel-pipe pile in the sea bed " is specially：Will be described by pile hammer
Steel-pipe pile is squeezed into the sea bed.
Further, the jack is hydraulic jack.
Further, the supporting leg, the sleeve, the steel-pipe pile, the jack and technique stake difference
For four.
Relative to prior art, rear piling jacket construction method of the present invention has the advantage that：
In the rear piling jacket construction method that the present invention is provided, comprise the following steps：Step S1, by technique stake squeeze into sea
In bed；Step S2, the jacket with jack hung into sea, until the base of jack is seated in the stake top of technique stake；
Step S3, the leveling by jack progress jacket；After step S4, leveling are finished, steel-pipe pile is hung to the set of jacket
In cylinder, and steel-pipe pile is squeezed into sea bed；Step S5, jack removed, technique stake is extracted.Thus analysis is understood, this hair
In the rear piling jacket construction method of bright offer, without using clip pile level device, so as to effectively reduce cost；And
And, leveling is carried out by jack, so that leveling process simple and fast；Meanwhile, technique stake and jack can be reused, from
And meet the installation of next jacket.
The present invention also provides jacket construction component of being driven piles after one kind, including：Jacket, the bottom of the jacket is provided with
Supporting leg, the supporting leg is connected with sleeve, the sleeve and is equipped with steel-pipe pile；The sleeve connection has jack, described
The base of jack is seated in the stake top of technique stake.
Wherein, the jack is hydraulic jack.
Specifically, the sleeve is connected with the supporting leg by way of welding；The jack leads to the sleeve
The mode for crossing welding is connected.
Further, the supporting leg, the sleeve, the steel-pipe pile, the jack and the technique are respectively
Four.
Relative to prior art, rear piling jacket construction component of the present invention has the advantage that：
In the rear piling jacket construction component that the present invention is provided, including：Jacket, the bottom of jacket is provided with support
Leg, supporting leg is connected with sleeve, sleeve and is equipped with steel-pipe pile；Wherein, sleeve connection has jack, and the base of jack is located
In the stake top of technique stake.Thus analysis is understood, the rear piling jacket construction component provided using the present invention carries out jacket
During installation, first technique stake can be squeezed into sea bed；The jacket with jack is hung into sea again, until the bottom of jack
Seat is seated in the stake top of technique stake；Then the leveling of jacket is carried out by jack；After leveling is finished, by steel-pipe pile hang to
In the sleeve of jacket, and steel-pipe pile is squeezed into sea bed；Finally jack is removed, technique stake is extracted.Therefore, it is of the invention
The rear piling jacket construction component provided, without using clip pile level device, so as to effectively reduce cost；Also, it is logical
Cross jack and carry out leveling, leveling process simple and fast；Meanwhile, technique stake and jack can be reused, so as to meet down
The installation of one jacket.
The present invention provides jacket of being driven piles after one kind again, including：Jacket, the bottom of the jacket is provided with supporting leg,
The supporting leg is welded with sleeve, the sleeve and is equipped with steel-pipe pile.
Wherein, the supporting leg, the sleeve and the steel-pipe pile are respectively four.
Piling jacket is relative with above-mentioned rear piling jacket construction method and rear piling jacket construction component after described
Have the advantage that identical, will not be repeated here in prior art.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of rear piling jacket construction method provided in an embodiment of the present invention；
Fig. 2 is the schematic flow sheet of another rear piling jacket construction method provided in an embodiment of the present invention；
Fig. 3 is the structural representation of rear piling jacket construction component provided in an embodiment of the present invention；
Fig. 4 is the structural representation of rear piling jacket provided in an embodiment of the present invention.
In figure：1- jackets；2- supporting legs；3- sleeves；4- jack；The stake of 5- techniques；6- steel-pipe piles.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, can be with
It is the connection of two element internals.For the ordinary skill in the art, it can understand that above-mentioned term exists with concrete condition
Concrete meaning in the present invention.
Fig. 1 is a kind of schematic flow sheet of rear piling jacket construction method provided in an embodiment of the present invention；Fig. 3 is this hair
The structural representation for the rear piling jacket construction component that bright embodiment is provided.
As shown in Fig. 1 combinations Fig. 3, the embodiment of the present invention provides jacket construction method of being driven piles after one kind, including following step
Suddenly：Step S1, technique stake 5 squeezed into sea bed；Step S2, the jacket 1 with jack 4 hung into sea, until very heavy
The base on top 4 is seated in the stake top of technique stake 5；Step S3, the leveling by the progress jacket 1 of jack 4；Step S4, leveling
After finishing, steel-pipe pile 6 is hung to the sleeve 3 of jacket 1, and steel-pipe pile 6 is squeezed into sea bed；Step S5, by jack 4
Remove, technique stake 5 is extracted.
Relative to prior art, the rear piling jacket construction method described in the embodiment of the present invention has the advantage that：
After provided in an embodiment of the present invention in piling jacket construction method, as shown in Fig. 1 combinations Fig. 3, including following step
Suddenly：Step S1, technique stake 5 squeezed into sea bed；Step S2, the jacket 1 with jack 4 hung into sea, until very heavy
The base on top 4 is seated in the stake top of technique stake 5；Step S3, the leveling by the progress jacket 1 of jack 4；Step S4, leveling
After finishing, steel-pipe pile 6 is hung to the sleeve 3 of jacket 1, and steel-pipe pile 6 is squeezed into sea bed；Step S5, by jack 4
Remove, technique stake 5 is extracted.Thus analysis is understood, in rear piling jacket construction method provided in an embodiment of the present invention, without
Using clip pile level device, so as to effectively reduce cost；Also, leveling is carried out by jack 4, so that leveling process is simple
It is single quick；Meanwhile, technique stake 5 and jack 4 can be reused, so as to meet the installation of next jacket 1.
Fig. 2 is the schematic flow sheet of another rear piling jacket construction method provided in an embodiment of the present invention.
Wherein, it is above-mentioned in rear piling jacket construction method provided in an embodiment of the present invention as shown in Fig. 2 combinations Fig. 3
It can also comprise the following steps before the step of " squeezing into technique stake 5 in sea bed "：Step S00, by sleeve 3 and jacket 1
Supporting leg 2 is welded；Step S01, jack 4 welded with sleeve 3.
Specifically, it is above-mentioned " steel-pipe pile 6 to be squeezed into sea in rear piling jacket construction method provided in an embodiment of the present invention
Bed in " the step of be specifically as follows：Steel-pipe pile 6 is squeezed into sea bed by pile hammer.
Further, in order that to carry out operation during leveling with jack 4 more convenient, it is provided in an embodiment of the present invention after beat
In pile leader frame construction method, above-mentioned jack 4 can be preferably hydraulic jack.
Herein it should be added that, hydraulic jack is also known as hydraulic jack, is a kind of to use plunger or hydraulic cylinder
It is used as the jack of rigid top lift part.The simple structure of hydraulic jack, it is lightweight, be easy to carry, conveniently moving.
Further, as shown in figure 3, in the construction component of above-mentioned jacket 1, the supporting leg 2, sleeve 3, steel-pipe pile
6th, jack 4 and technique stake 5 can be respectively set to four.
Certainly, during practical application, in the construction component of above-mentioned jacket 1, the supporting leg 2, sleeve 3, steel-pipe pile 6, thousand
The particular number of jin top 4 and technique stake 5 is not limited herein, rationally, for example：Can be respectively set to three or three with
On.
As shown in figure 3, the embodiment of the present invention also provides piling jacket construction component after one kind, including：Jacket 1, leads
The bottom of pipe support 1 is provided with supporting leg 2, and supporting leg 2 is connected with sleeve 3, sleeve 3 and is equipped with steel-pipe pile 6；Sleeve 3 is connected with thousand
Jin top 4, the base of jack 4 is seated in the stake top of technique stake 5.
Relative to prior art, the rear piling jacket construction component described in the embodiment of the present invention has the advantage that：
After provided in an embodiment of the present invention in piling jacket construction component, as shown in figure 3, including：Jacket 1, conduit
The bottom of frame 1 is provided with supporting leg 2, and supporting leg 2 is connected with sleeve 3, sleeve 3 and is equipped with steel-pipe pile 6；Wherein, sleeve 3 is connected with
Jack 4, the base of jack 4 is seated in the stake top of technique stake 5.Thus analysis is understood, using provided in an embodiment of the present invention
When piling jacket construction component carries out the installation of jacket 1 afterwards, first technique stake 5 can be squeezed into sea bed；Thousand will be carried again
The jacket 1 on jin top 4 is hung into sea, until the base of jack 4 is seated in the stake top of technique stake 5；Then entered by jack 4
The leveling of row jacket 1；After leveling is finished, steel-pipe pile 6 is hung to the sleeve 3 of jacket 1, and steel-pipe pile 6 is squeezed into sea
In bed；Finally jack 4 is removed, technique stake 5 is extracted.Therefore, rear piling jacket construction provided in an embodiment of the present invention
Component, without using clip pile level device, so as to effectively reduce cost；Also, leveling, leveling are carried out by jack 4
Process simple and fast；Meanwhile, technique stake 5 and jack 4 can be reused, so as to meet the installation of next jacket 1.
Wherein, in order that to carry out operation during leveling with jack 4 more convenient, it is provided in an embodiment of the present invention after piling lead
In pipe support construction component, above-mentioned jack 4 can be preferably hydraulic jack.
Herein it should be added that, hydraulic jack is also known as hydraulic jack, is a kind of to use plunger or hydraulic cylinder
It is used as the jack of rigid top lift part.The simple structure of hydraulic jack, it is lightweight, be easy to carry, conveniently moving.
Specifically, after provided in an embodiment of the present invention in piling jacket construction component, above-mentioned sleeve 3 and supporting leg 2 it
Between can be attached by way of welding；Correspondingly, can also be by the side of welding between above-mentioned jack 4 and sleeve 3
Formula is attached.
Further, as shown in figure 3, it is provided in an embodiment of the present invention after piling jacket construction component in, above-mentioned support
Leg 2, sleeve 3, steel-pipe pile 6, jack 4 and technique stake 5 can be respectively set to four.
Certainly, during practical application, in the construction component of above-mentioned jacket 1, the supporting leg 2, sleeve 3, steel-pipe pile 6, thousand
The particular number of jin top 4 and technique stake 5 is not limited herein, rationally, for example：Can be respectively set to three or three with
On.
Fig. 4 is the structural representation of rear piling jacket provided in an embodiment of the present invention.
As shown in figure 4, the embodiment of the present invention provides jacket of being driven piles after one kind again, including：Jacket 1, the bottom of jacket 1
End is provided with supporting leg 2, and supporting leg 2 is welded with sleeve 3, sleeve 3 and is equipped with steel-pipe pile 6.
Wherein, as shown in figure 4, it is provided in an embodiment of the present invention after piling jacket in, above-mentioned supporting leg 2, sleeve 3 and steel
Pile tube 6 can be respectively set to four.
Certainly, during practical application, the particular number of supporting leg 2, sleeve 3 and steel-pipe pile 6 in above-mentioned jacket 1 is herein not
It is limited, rationally, for example：Three or more than three can be respectively set to.
Jacket is driven piles after provided in an embodiment of the present invention when mounted, it is necessary to coordinate, leveling is carried out by jack 4,
So as to leveling process simple and fast；Meanwhile, technique stake 5 and jack 4 can be reused, so as to meet next jacket 1
Installation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. jacket construction method of being driven piles after one kind, it is characterised in that comprise the following steps：
Technique stake is squeezed into sea bed；
The jacket with jack is hung into sea, until the base of the jack is seated in the stake of the technique stake
Top；
The leveling of the jacket is carried out by the jack；
After leveling is finished, steel-pipe pile is hung to the sleeve of the jacket, and the steel-pipe pile is squeezed into the sea bed；
The jack is removed, technique stake is extracted.
2. piling jacket construction method after according to claim 1, it is characterised in that described " sea to be squeezed into technique stake
Bed in " the step of before also comprise the following steps：
The supporting leg of the sleeve and the jacket is welded；
By the jack and the sleeve weld.
3. piling jacket construction method after according to claim 2, it is characterised in that described " to beat the steel-pipe pile
Enter in the sea bed " the step of be specially：
The steel-pipe pile is squeezed into the sea bed by pile hammer.
4. piling jacket construction method after according to claim 3, it is characterised in that the jack is hydraulic jack
Top.
5. the rear piling jacket construction method according to any one of claim 2-4, it is characterised in that the support
Leg, the sleeve, the steel-pipe pile, the jack and technique stake are respectively four.
6. jacket construction component of being driven piles after one kind, it is characterised in that including：Jacket, the bottom of the jacket is provided with branch
Support leg, the supporting leg is connected with sleeve, the sleeve and is equipped with steel-pipe pile；
The sleeve connection has jack, and the base of the jack is seated in the stake top of technique stake.
7. piling jacket construction component after according to claim 6, it is characterised in that the jack is hydraulic jack
Top.
8. the rear piling jacket construction component according to claim 6 or 7, it is characterised in that the sleeve and the branch
Support leg is connected by way of welding；
The jack is connected with the sleeve by way of welding.
9. it is according to claim 8 after piling jacket construction component, it is characterised in that the supporting leg, the sleeve,
The steel-pipe pile, the jack and technique stake are respectively four.
10. jacket of being driven piles after one kind, it is characterised in that including：Jacket, the bottom of the jacket is provided with supporting leg, institute
State supporting leg and be welded with sleeve, the sleeve and be equipped with steel-pipe pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710694171.2A CN107268669A (en) | 2017-08-14 | 2017-08-14 | Piling jacket construction method, rear piling jacket construction component, jacket of driving piles afterwards afterwards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710694171.2A CN107268669A (en) | 2017-08-14 | 2017-08-14 | Piling jacket construction method, rear piling jacket construction component, jacket of driving piles afterwards afterwards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107268669A true CN107268669A (en) | 2017-10-20 |
Family
ID=60080335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710694171.2A Pending CN107268669A (en) | 2017-08-14 | 2017-08-14 | Piling jacket construction method, rear piling jacket construction component, jacket of driving piles afterwards afterwards |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107268669A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118697A (en) * | 2018-02-28 | 2018-06-05 | 浙江华蕴海洋工程技术服务有限公司 | The convenient adjusting apparatus of marine guidance piling and method of adjustment |
| CN110747882A (en) * | 2019-10-14 | 2020-02-04 | 中国海洋大学 | Nail type anti-sinking plate for ocean engineering, jacket and construction method |
| CN116427375A (en) * | 2023-06-02 | 2023-07-14 | 天津天易海上工程有限公司 | Shallow sea jacket leveling mechanism and use method thereof |
| CN116791555A (en) * | 2023-08-29 | 2023-09-22 | 西南石油大学 | Drilling platform pile shoe structure |
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| US4367056A (en) * | 1981-01-23 | 1983-01-04 | Varco International, Inc. | Marine platform jacket jack |
| US20100054863A1 (en) * | 2008-08-29 | 2010-03-04 | Will Consulting, Inc. | Flex-Leg Offshore Structure |
| CN201649118U (en) * | 2010-04-07 | 2010-11-24 | 中国水电顾问集团华东勘测设计研究院 | Foundation structure of jacket-type offshore wind turbine |
| CN103119222A (en) * | 2010-07-05 | 2013-05-22 | 船舶通用涡轮有限公司 | Surface-breaking re-usable submergeable template for installing one or more submerged columns/piles |
| CN103556649A (en) * | 2013-11-08 | 2014-02-05 | 广东明阳风电产业集团有限公司 | Jacket leveling mechanism of offshore wind turbine generator system |
| CN204370469U (en) * | 2014-12-24 | 2015-06-03 | 广州华申建设工程管理有限公司 | A kind of drilled pile long leg jacket offshore wind turbine foundation |
| CN105780806A (en) * | 2014-12-24 | 2016-07-20 | 广州华申建设工程管理有限公司 | Offshore wind turbine foundation for long-leg jacket of drilling piles and construction method of offshore wind turbine foundation |
| CN105780802A (en) * | 2014-12-23 | 2016-07-20 | 广州华申建设工程管理有限公司 | Jacket offshore wind turbine foundation with brackets and construction method thereof |
| CN205776423U (en) * | 2016-05-22 | 2016-12-07 | 中交第一航务工程局有限公司 | A kind of levelling device for offshore wind farm catheterostat basis |
| CN207160049U (en) * | 2017-08-14 | 2018-03-30 | 浙江华蕴海洋工程技术服务有限公司 | Piling jacket construction component, jacket of driving piles afterwards afterwards |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4367056A (en) * | 1981-01-23 | 1983-01-04 | Varco International, Inc. | Marine platform jacket jack |
| US20100054863A1 (en) * | 2008-08-29 | 2010-03-04 | Will Consulting, Inc. | Flex-Leg Offshore Structure |
| CN201649118U (en) * | 2010-04-07 | 2010-11-24 | 中国水电顾问集团华东勘测设计研究院 | Foundation structure of jacket-type offshore wind turbine |
| CN103119222A (en) * | 2010-07-05 | 2013-05-22 | 船舶通用涡轮有限公司 | Surface-breaking re-usable submergeable template for installing one or more submerged columns/piles |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118697A (en) * | 2018-02-28 | 2018-06-05 | 浙江华蕴海洋工程技术服务有限公司 | The convenient adjusting apparatus of marine guidance piling and method of adjustment |
| CN110747882A (en) * | 2019-10-14 | 2020-02-04 | 中国海洋大学 | Nail type anti-sinking plate for ocean engineering, jacket and construction method |
| CN116427375A (en) * | 2023-06-02 | 2023-07-14 | 天津天易海上工程有限公司 | Shallow sea jacket leveling mechanism and use method thereof |
| CN116427375B (en) * | 2023-06-02 | 2023-09-05 | 天津天易海上工程有限公司 | Shallow sea jacket leveling mechanism and use method thereof |
| CN116791555A (en) * | 2023-08-29 | 2023-09-22 | 西南石油大学 | Drilling platform pile shoe structure |
| CN116791555B (en) * | 2023-08-29 | 2023-11-17 | 西南石油大学 | Drilling platform pile shoe structure |
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Application publication date: 20171020 |