CN107697238A - A kind of dry tree semi-submerged platform of deep water floating type multifunctional and its offshore installation method - Google Patents
A kind of dry tree semi-submerged platform of deep water floating type multifunctional and its offshore installation method Download PDFInfo
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- CN107697238A CN107697238A CN201710873116.XA CN201710873116A CN107697238A CN 107697238 A CN107697238 A CN 107697238A CN 201710873116 A CN201710873116 A CN 201710873116A CN 107697238 A CN107697238 A CN 107697238A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B35/4413—Floating drilling platforms, e.g. carrying water-oil separating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B2021/505—Methods for installation or mooring of floating offshore platforms on site
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
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Abstract
The present invention relates to a kind of dry tree semi-submerged platform of deep water floating type multifunctional and its offshore installation method, wherein, the semi-submerged platform includes main hull, upper chunk and packet type anchoring system；Main hull includes being internally provided with the upper float of ballast tank and functional cabin, the middle lower floating body for offering the passage for being easy to tensioned risers, production riser and/or drilling riser pipe to pass through and the flexible connection column of connection upper float and lower floating body, main hull can be switched by flexible connection column between folded state and deployed condition, lower floating body in a folded configuration is close in upper float bottom, and lower floating body in the deployed state maintains a certain distance with upper float；Upper chunk is arranged on upper float top, and upper chunk includes top facility；Packet type anchoring system includes more mooring lines, and mooring line is connected with upper float.The technology of the present invention is succinct, and mounting cost is low, the oil-gas field development that can be widely applied under deep water marine environmental conditions.
Description
Technical field
The invention belongs to deep water offshore and gas development technical field, more particularly to a kind of dry tree partly latent of deep water floating type multifunctional
Platform and its offshore installation method.
Background technology
Deepwater floating platform is the main equipment of current deep water offshore and gas development.In recent years, there is a variety of be used for deeply
The floating production platform of water offshore and gas development, including semisubmersible platform, deep drinking water open side type platform and tension leg platform (TLP).Its
In, the heaving poor-performing of semisubmersible platform, wet-type christmas tree must be used during as deepwater oil-gas development production platform,
It is and wet-type christmas tree technical sophistication, expensive；Deep drinking water open side type platform has good exercise performance, can dry type exploitation,
But the necessary split Attention problems in upper and lower part of deep drinking water open side type platform, cause Attention problems and connection operation very multiple
It is miscellaneous, it is deep to absorb water that open side type platform also has that Texas deck area is small, design difficulty is big and oil vapor treatment facility difficult arrangement etc. lacks
Point；Tension leg platform (TLP) equally has a good exercise performance, but because it is connected using tension leg with seafloor foundation, its cost with
The depth of water increases and increased sharply.On the other hand, China South Sea natural gas resource enriches, often adjoint in Large gas field exploitation
A considerable number of condensate resource.Condensate resource is generally required by defeated outside pipeline, but individually one deep water condensation of laying
Involving great expense for oil pipeline, it is less economical；If deepwater floating platform possesses condensate store function, will substantially reduce engineering into
This.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of dry tree semi-submerged platform of deep water floating type multifunctional and its sea
Installation method, upper chunk can be achieved and transport and install with the towage of main hull entirety, while heaving function admirable, oil gas can be achieved
The dry tree of resource is exploited and can hang tensioned risers.
To achieve the above object, the present invention takes following technical scheme：A kind of dry tree semi-submerged platform of deep water floating type multifunctional,
Characterized in that, the platform includes main hull, upper chunk and packet type anchoring system；Wherein, the main hull includes inside
It is provided with the upper float of ballast tank and functional cabin, centre offers and is easy to tensioned risers, production riser and/or drilling riser pipe
The lower floating body of the passage passed through and the flexible connection column for connecting the upper float and lower floating body, the main hull passes through described
Flexible connection column can switch between folded state and deployed condition, and the lower floating body is close in described in a folded configuration
Upper float bottom, in the deployed state the lower floating body maintained a certain distance with the upper float；The upper chunk installation
On the upper float top, the upper chunk includes top facility；The packet type anchoring system includes more mooring lines, institute
Mooring line is stated with the upper float to be connected.
The upper float is the semi-submerged platform hull for including at least 3 root posts and at least three buoyancy tank, the adjacent column it
Between be fixedly connected by the buoyancy tank, the arrangement ballast tank and functional cabin in the buoyancy tank；Outside the two of the every column
Open connection neck and anchoring system chock are set respectively on side, and the flexible connection column passes through the open company
Neck is connect with the upper float to be connected；The mooring line is connected by the anchoring system chock with the upper float.
Condensate storage, inerting and outer defeated device are additionally provided with the upper float.
The condensate storage device is to be arranged on one or more layers condensate storage cabin inside the column；It is described solidifying
Condensate oil inerting unit is inert gas generator；Defeated device is the Cargo Oil Pump being arranged in the column outside the condensate；Institute
State and annular isolation cabin is set between the lateral wall of condensate storage cabin and the lateral wall of the column；The column centrally along axle
Enter passage to setting.
The column is cylinder, square column, polygon rhombus column or nearly cylindrical shell structure；The lower floating body is box structure.
The flexible connection column uses tension tendon, rigid posts, flexible anchor chain or anchor hawser；The flexible connection column
Radical need to design according to mechanical performance index.
The mooring line uses traditional anchor chain form, anchor chain-cable-anchor chain combining form or whole polyester cable form；It is described
The radical of mooring line needs to design according to mechanical performance index.
A kind of offshore installation method of the dry tree semi-submerged platform of deep water floating type multifunctional, comprises the following steps：
1) construction of upper float and lower floating body is completed in build the side, and by upper float and is floated downward by flexible connection column
Body phase is connected, and upper float, lower floating body and flexible connection column are floated in harbour basin or temporary anchorage as overall, so as to complete
Into the construction of main hull；In harbour basin or temporary anchorage, upper chunk is built or lifted to integrally on upper float, partly
Latent platform drinking water reaches design towage drinking water；Now semi-submerged platform is in folded state, and lower floating body is close in the bottom of upper float；
2) half is assessed according to the distance between build the side and the sea situation and build the side of fabricating yard and fabricating yard
The Technical Economy of latent platform entirety towage, selection using partly latent barge it is dry drag or from it is floating it is wet drag by the way of by semi-submerged platform entirety
Haul to fabricating yard, now semi-submerged platform is in free floating condition；
3) the ballast tank part ballast in fabricating yard, upper float, semi-submerged platform integral sinking；One is respectively thrown from upper float
Root or more mooring lines, Primary Location is carried out to the semi-submerged platform under installation operating mode；By lower floating body in order gradually under straighten
It is fully deployed to lower floating body, lower floating body is fixed by flexible connection column, now semi-submerged platform is in deployed condition；Installation is remaining
All mooring lines, complete the final positioning to semi-submerged platform；
4) suspension installation tensioned risers, production riser and/or drilling riser pipe, semi-submerged platform pressure are loaded onto designed draft,
It is finally completed semi-submerged platform installation.
For the present invention due to taking above technical scheme, it has advantages below：1st, a kind of more work(of deep water floating of the invention
Dry semi-submerged platform and its offshore installation method can be set, main hull and upper chunk entirety towage can be used in a folded configuration,
Large marine crane barge facility need not be employed, Attention problems cost is greatly reduced.2nd, a kind of deep water floating type multifunctional of the invention is done
Set semi-submerged platform and its offshore installation method, the lower floatation under deployed condition is big, area is big, there is provided largely attaches water quality
Amount, so as to effectively improve the heaving performance of platform, tensioned risers can be hung, realize dry tree exploitation petroleum resources.3rd, it is of the invention
A kind of dry tree semi-submerged platform of deep water floating type multifunctional and its offshore installation method, by setting condensate to deposit in upper float
Storage, inerting and outer defeated device, the memory function of condensate can be achieved, be suitable for the exploitation of Large gas field, substantially reduce engineering into
This.4th, a kind of dry tree semi-submerged platform of deep water floating type multifunctional of the invention and its offshore installation method, upper float and lower floating body
Connection uses tension leg tubing or anchor chain, and lower floating body transfers mounting means, and technology is succinct, and mounting cost is low, can extensive use
Oil-gas field development under deep water marine environmental conditions.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the main structure diagram of the upper float of the present invention；
Fig. 3 is the overlooking the structure diagram of the upper float of the present invention；
Fig. 4 is the structural representation of A-A sections in Fig. 2；
Fig. 5 is the structural representation of folded state of the present invention；
Fig. 6 is that the present invention reaches the mooring of fabricating yard part and lower floating body decentralization process schematic diagram；
Fig. 7 is the structural representation of deployed condition of the present invention.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of dry tree semi-submerged platform of deep water floating type multifunctional provided by the invention, it include main hull 1, on
Portion's chunk 2 and packet type anchoring system 3.Wherein, main hull 1 includes upper float 11, lower floating body 12 and flexible connection column 13, on
Ballast tank and functional cabin are set in floating body 11, is opened up among lower floating body 12 and is easy to tensioned risers 4, production riser, drilling well to stand
The passage that pipe and other umbilicals pass through；It is connected between upper float 11 and lower floating body 12 by flexible connection column 13；Upper group
Block 2 is arranged on the top of upper float 11, and upper chunk 2 includes the top facilities such as production of hydrocarbons module, drilling and repairing well module, life building
21；Packet type anchoring system 3 includes windlass (not shown) and Duo Gen mooring lines 31, the floating of mooring line 31 and main hull 1
Body 11 is connected, and the semi-submerged platform of the present invention is positioned by packet type anchoring system 3.The semi-submerged platform of the present invention passes through
Flexible connection column 13 can switch between folded state and deployed condition：When in harbour basin or temporary anchorage, this hair
Bright semi-submerged platform is in folded state, and lower floating body 12 is close in the bottom of upper float 11, and now semi-submerged platform can be very easily
Wet drag from navigating or be dragged to fabricating yard using partly latent barge is dry；At fabricating yard, semi-submerged platform of the invention is in expansion shape
State, lower floating body 12 are maintained a certain distance with upper float 11, and added mass of entrained water is provided in platform heaving, are improved partly latent and are put down
The heaving performance of platform, dry tree exploitation can be achieved.
In above-described embodiment, as shown in Figure 2 to 4, upper float 11 is to include at least 3 root posts 111 and at least three buoyancy tank
112 semi-submerged platform hull, it is fixedly connected by buoyancy tank 112 between adjacent upright posts 111, is triangle so as to form projection of shape
The hull of shape, quadrangle, pentagon or hexagon etc.；It is for instance possible to use four heavy in section columns 111 and back-shaped buoyancy tank
112.Column 111 is in the section of water surface site as floating motion and the Water Plane of stability, there is provided platform pitching, rolling and heaving
The reply rigidity of motion；Buoyancy tank 112 provides displacement, while can arrange the functional cabins such as ballast tank and cabin.Per root post 111
Two lateral surfaces on open connection neck 113 and anchoring system chock 114 is set respectively, open connection neck 113 is used
Flexible connection column 13 after fixed lower floating body 12 deploys in place, by the way that flexible connection column 13 is aligned into open connection card
Groove 113 connects and fixes, and realizes the connection of upper float 11 and flexible connection column 13, can constrain flexible connection column 13 x, y,
The translational degree of freedom and the rotational freedom around z-axis in three directions of z-axis, certain turn provided by rubber or other elastomeric materials
The flexible connection column 13 of dynamic stiffness constraint (is stretched on the respectively edge of x, y, z direction of principal axis here around x-axis and around the rotational freedom of y-axis
Contracting connects the opening direction of axial, the open connection neck 113 of column 13 and perpendicular to the direction of x/y plane)；Mooring line
31 are connected by anchoring system chock 114 with upper float 11.
In above-described embodiment, column 111 can be cylinder, square column, polygon rhombus column or nearly cylindrical shell structure.
In above-described embodiment, condensate storage, inerting and outer defeated device, condensate storage dress are additionally provided with upper float 11
One or more layers condensate storage cabin 115 being arranged on inside column 111 is set to, for storing with quantity caused by natural gas
Considerable condensate；Inerting unit is inert gas generator 116, and the space of condensate storage cabin 115 is filled using inert gas,
Inerting cabin spaces, to reach the explosion-proof and safe purpose of inerting；Outer defeated device is the Cargo Oil Pump 117 being arranged in column 111,
Being pumped into and pumping out for condensate；Annular isolation cabin is set between the lateral wall of condensate storage cabin 115 and the lateral wall of column 111
118, ballast tank or empty cabin can be used as, to meet the requirement such as condensate security isolation, floating body damaged stability；Column 111 centrally along
It is axially arranged to enter passage 119, for purposes such as personnel's entrance and overhauls of the equipments.
In above-described embodiment, as shown in figure 1, lower floating body 12 is box structure, provided in semi-submerged platform catenary motion attached
Even water quality, so that the natural heaving period of semi-submerged platform avoids the main energy range of wave spectrum, reach and reduce platform heaving
The purpose of motion, to meet the requirement of dry tree exploitation and tensioned risers suspension etc..
In above-described embodiment, flexible connection column 13 uses tension tendon, or rigid posts (such as steel column, on
Section and hypomere can use forging or casting), or flexible anchor chain or anchor hawser；Column 13 is connected when being used as to stretch using rigid posts
When, flexible connection column 13 is subjected to interim fixing fixation at open connection neck 113.The radical of flexible connection column 13
Design as needed, to meet the mechanical performance indexs such as intensity, rigidity and fatigue strength.
In above-described embodiment, the mooring line 31 of packet type anchoring system 3 uses traditional anchor chain mode, or anchor chain-cable-anchor
Chain combination, or whole polyester cable mode.The radical of mooring line 31 designs as needed, to meet intensity, rigidity and fatigue
The mechanical performance indexs such as intensity.
A kind of offshore installation method of the dry tree semi-submerged platform of deep water floating type multifunctional of the present invention, comprises the following steps：
1) as shown in figure 5, completing the construction of upper float 11 and lower floating body 12 in build the side, and flexible connection column is passed through
13 are connected upper float 11 with lower floating body 12, and upper float 11, lower floating body 12 and flexible connection column 13 float on as overall
In harbour basin or temporary anchorage, so as to complete the construction of main hull 1；In harbour basin or temporary anchorage, in upper float 11
Upper integrally is built or lifting upper chunk 2, including carries out the tops such as production of hydrocarbons module, drilling and repairing well module, life building and set
21 lifting is applied, the drinking water of the semi-submerged platform after lifting is completed and reaches design towage drinking water；Now semi-submerged platform of the invention is in
Folded state, lower floating body 12 are close in the bottom of upper float 11.
2) this is assessed according to the distance between build the side and the sea situation and build the side of fabricating yard and fabricating yard
The Technical Economy of the semi-submerged platform entirety towage of invention, selection are dragged using partly latent barge is dry or send out this from by the way of floating wet drag
Bright semi-submerged platform is integrally hauled to fabricating yard, and semi-submerged platform of the invention is in free floating condition.
3) as shown in fig. 6, in fabricating yard, the ballast tank part ballast in upper float 11, semi-submerged platform integral sinking；From
One or more mooring line 31 is respectively thrown on the column 111 of upper float 11, the semi-submerged platform under installation operating mode is carried out preliminary
Positioning；In the presence of winch or chain winch 5, the gradually decentralization in order of lower floating body 12 is held by rope chain.It is as shown in fig. 7, straight
Transferred to lower floating body 12 up to predetermined depth, i.e. position of maximum extension, lower floating body 12 is fully deployed；By all flexible connections
Column 13 aligns clamping and locked with corresponding open connection neck 113 respectively, is fixed and floated downward by flexible connection column 13
Body 12, semi-submerged platform now of the invention are in deployed condition；Remaining all mooring lines 31 are installed, and pass through chain winch 5
The pretension of mooring line 31 and locking are adjusted, completes the final positioning to semi-submerged platform.
4) as shown in figure 1, suspension installation tensioned risers 4 and/or other umbilicals, platform pressure are loaded onto designed draft, most
The semi-submerged platform installation of the present invention is completed eventually.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, set location and its connected mode etc.
It can all be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement, should not arrange
In addition in protection scope of the present invention.
Claims (10)
1. the dry tree semi-submerged platform of a kind of deep water floating type multifunctional, it is characterised in that the platform includes main hull, upper chunk and divided
Group formula anchoring system；Wherein, the main hull include be internally provided with the upper float of ballast tank and functional cabin, centre offers
Be easy to the passage that tensioned risers, production riser and/or drilling riser pipe pass through lower floating body and the connection upper float and under
The flexible connection column of floating body, the main hull can be between folded state and deployed conditions by the flexible connection column
Switching, the lower floating body is close in the upper float bottom in a folded configuration, in the deployed state the lower floating body with it is described
Upper float maintains a certain distance；The upper chunk is arranged on the upper float top, and the upper chunk is set including top
Apply；The packet type anchoring system includes more mooring lines, and the mooring line is connected with the upper float.
2. the dry tree semi-submerged platform of a kind of deep water floating type multifunctional as claimed in claim 1, it is characterised in that the upper float is
Semi-submerged platform hull including at least 3 root posts and at least three buoyancy tank, passes through the buoyancy tank between the adjacent column and fixes and connect
Connect, the arrangement ballast tank and functional cabin in the buoyancy tank；Set respectively on two lateral surfaces of the every column open
Neck and anchoring system chock are connected, the flexible connection column passes through the open connection neck and the floating body phase
Connection；The mooring line is connected by the anchoring system chock with the upper float.
3. the dry tree semi-submerged platform of a kind of deep water floating type multifunctional as claimed in claim 2, it is characterised in that in the upper float
It is additionally provided with condensate storage, inerting and outer defeated device.
4. the dry tree semi-submerged platform of a kind of deep water floating type multifunctional as claimed in claim 3, it is characterised in that the condensate is deposited
Saving is set to one or more layers condensate storage cabin being arranged on inside the column；The condensate inerting unit is indifferent gas
Body generator；Defeated device is the Cargo Oil Pump being arranged in the column outside the condensate；The outside of the condensate storage cabin
Annular isolation cabin is set between the lateral wall of wall and the column；The center of the column is axially disposed to enter passage.
5. the dry tree semi-submerged platform of a kind of deep water floating type multifunctional as described in Claims 2 or 3 or 4, it is characterised in that described vertical
Post is cylinder, square column, polygon rhombus column or nearly cylindrical shell structure；The lower floating body is box structure.
A kind of 6. dry tree semi-submerged platform of deep water floating type multifunctional as claimed in claim 1 or 2 or 3 or 4, it is characterised in that institute
State flexible connection column and use tension tendon, rigid posts, flexible anchor chain or anchor hawser；It is described it is flexible connection column radical according to
Mechanical performance index needs to design.
A kind of 7. dry tree semi-submerged platform of deep water floating type multifunctional as claimed in claim 5, it is characterised in that the flexible connection
Column uses tension tendon, rigid posts, flexible anchor chain or anchor hawser；The radical of the flexible connection column refers to according to mechanical property
Target needs to design.
A kind of 8. dry tree semi-submerged platform of deep water floating type multifunctional as described in claim 1 or 2 or 3 or 4 or 7, it is characterised in that
The mooring line uses traditional anchor chain form, anchor chain-cable-anchor chain combining form or whole polyester cable form；The mooring line
Radical needs to design according to mechanical performance index.
9. the dry tree semi-submerged platform of a kind of deep water floating type multifunctional as claimed in claim 6, it is characterised in that the mooring line is adopted
With traditional anchor chain form, anchor chain-cable-anchor chain combining form or whole polyester cable form；The radical of the mooring line is according to mechanics
Performance indications need to design.
10. a kind of offshore installation method of the dry tree semi-submerged platform of deep water floating type multifunctional, comprises the following steps：
1) construction of upper float and lower floating body is completed in build the side, and body phase by upper float and is floated downward by flexible connection column
Connection, upper float, lower floating body and flexible connection column are floated in harbour basin or temporary anchorage as overall, so as to complete to lead
The construction of hull；In harbour basin or temporary anchorage, integrally is built on upper float or lifting upper chunk, partly latent are put down
Platform drinking water reaches design towage drinking water；Now semi-submerged platform is in folded state, and lower floating body is close in the bottom of upper float；
2) sea situation and build the side according to build the side and fabricating yard are put down with the distance between fabricating yard assessment partly latent
The Technical Economy of platform entirety towage, selection are dragged using partly latent barge is dry or integrally haul semi-submerged platform from by the way of floating wet drag
To fabricating yard, now semi-submerged platform is in free floating condition；
3) the ballast tank part ballast in fabricating yard, upper float, semi-submerged platform integral sinking；Respectively thrown from upper float one or
More mooring lines, Primary Location is carried out to the semi-submerged platform under installation operating mode；Lower floating body is gradually transferred under in order
Floating body is fully deployed, and fixes lower floating body by flexible connection column, now semi-submerged platform is in deployed condition；Remaining institute is installed
There is mooring line, complete the final positioning to semi-submerged platform；
4) suspension installation tensioned risers, production riser and/or drilling riser pipe, semi-submerged platform pressure are loaded onto designed draft, finally
Complete semi-submerged platform installation.
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| CN201710873116.XA CN107697238B (en) | 2017-09-25 | 2017-09-25 | Deep-water floating type multifunctional dry-tree semi-submersible platform and offshore installation method thereof |
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| CN201710873116.XA CN107697238B (en) | 2017-09-25 | 2017-09-25 | Deep-water floating type multifunctional dry-tree semi-submersible platform and offshore installation method thereof |
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| CN107697238B CN107697238B (en) | 2021-09-07 |
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Cited By (13)
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|---|---|---|---|---|
| CN109823484A (en) * | 2019-01-18 | 2019-05-31 | 中国海洋石油集团有限公司 | A kind of floating box structure inhibiting platform heaving |
| CN109866888A (en) * | 2019-03-25 | 2019-06-11 | 中国海洋石油集团有限公司 | The dry tree semi-submerged platform heave plate of one kind and main hull relative motion inhibit device |
| CN110155262A (en) * | 2019-06-04 | 2019-08-23 | 中国海洋石油集团有限公司 | A kind of dry tree semisubmersible platform with self installation function |
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| CN113386918A (en) * | 2021-07-19 | 2021-09-14 | 中国海洋石油集团有限公司 | Deep water semi-submersible type production platform lower floating body and block closing method thereof |
| CN113581417A (en) * | 2021-07-20 | 2021-11-02 | 海洋石油工程股份有限公司 | Tieback lifting method and lifting system for mounting semi-submersible production platform vertical pipe |
| CN114348194A (en) * | 2022-01-13 | 2022-04-15 | 东北石油大学 | Suspension type FRP concrete combined guyed tower type damping platform and construction method thereof |
| CN114368456A (en) * | 2021-12-15 | 2022-04-19 | 上海振华重工启东海洋工程股份有限公司 | Process for separating upper floating body and lower floating body of offshore platform |
| CN114475943A (en) * | 2022-01-18 | 2022-05-13 | 中国能源建设集团广东省电力设计研究院有限公司 | Offshore substation and design waterline position calculation method thereof |
| CN114604379A (en) * | 2022-03-28 | 2022-06-10 | 中海石油(中国)有限公司 | Semi-submersible floating type fan foundation with anti-collision isolation cabin on stand column |
| CN114771759A (en) * | 2022-05-12 | 2022-07-22 | 中海石油(中国)有限公司 | Buoyancy eccentric semi-submerged floating type fan foundation suitable for large megawatt unit |
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