CN106005293A - Notch cantilevered type self elevating type drilling platform - Google Patents
Notch cantilevered type self elevating type drilling platform Download PDFInfo
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- CN106005293A CN106005293A CN201610412540.XA CN201610412540A CN106005293A CN 106005293 A CN106005293 A CN 106005293A CN 201610412540 A CN201610412540 A CN 201610412540A CN 106005293 A CN106005293 A CN 106005293A
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- notch
- cantilever beam
- main hull
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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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- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
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Abstract
The invention provides a notch cantilevered type self elevating type drilling platform. The notch cantilevered type self elevating type drilling platform comprises a main hull, a cantilever beam, a well drilling mechanism and a sliding mechanism, wherein a notch is formed in the end part of a ship stern of the main hull; the cantilever beam is supported on the main hull, covers the notch, and can move between an initial position and an exceeding position in the longitudinal direction of the main hull; when being arranged in the initial position, the cantilever beam is integrally positioned on the main hull and can operate well drilling operation in the hull; when being arranged at the exceeding position, at least part of the cantilever beam exceeds the main hull and extends from the ship stern of the main hull, and can operate well drilling operation outside the hull; the well drilling mechanism is arranged on the cantilever beam; the sliding mechanism comprises a driving part, a first connecting part and a second connecting part, wherein the first connecting part is arranged on the main hull; the second connecting part is arranged on the cantilever beam; the first connecting part is meshed with the second connecting part; a motor can drive the first connecting part to move, so as to drive the second connecting part and the cantilever beam to move jointly.
Description
Technical field
The present invention relates to drilling platforms, particularly relate to a kind of notch type jack-up rigs with cantilever beam and put down
Platform.
Background technology
Self-elevating drilling platform is a kind of packaged type marine drilling equipment, general without from navigating ability, having
The advantages such as strong, removable good, the operating flexibility of performance of stationkeeping ability, are widely used in gas and oil in sea and open
The field of sending out.
At present, existing self-elevating drilling platform can be divided into notch type platform and cantilever platform, notch type
Platform is provided with notch, rig floor and derrick at main hull stern and is positioned at above notch, the drilling rod on rig floor to
Under arrive seabed by notch and carry out operation, this kind of platform well drilling synthetic load is relatively big, but pitching pile bores every time
Well quantity is few, and efficiency is low.Cantilever platform is slotted the most on the body construction, but is provided with packaged type cantilever
Beam, its advantage is that drillng operation scope is big, efficiency is high, but platform tilting moment is big, to spud leg equal strength
Require height, and deck effective area and drilling well synthetic load less.
Accordingly, it would be desirable to existing self-elevating drilling platform is improved, to overcome drawbacks described above as far as possible,
And comprise above-mentioned advantage.
Summary of the invention
Based on the problems referred to above, the invention provides a kind of notch cantilevered self-elevating drilling platform, to improve
Platform operations efficiency and operating water depth, increase deck effective area and drilling loads, reduces platform deadweight.
For reaching above-mentioned purpose, the present invention provides a kind of notch cantilevered self-elevating drilling platform, and it includes
Main hull, cantilever beam, drilling rig structure and slipping mechanism.The end of the ship stern of main hull is provided with notch.Outstanding
Arm beam is supported on main hull, and covers notch, and can along main hull longitudinally initial position with
Moving beyond between position, when initial position, cantilever beam is integrally located on main hull, beyond position
Time, cantilever beam is at least part of beyond main hull, stretches out from the ship stern of main hull.Drilling rig structure is arranged at
On cantilever beam.Slipping mechanism includes drive division, the first connecting portion and the second connecting portion, and the first connecting portion sets
Being placed in main hull, the second connecting portion is arranged at cantilever beam, the first connecting portion and the engagement of the second connecting portion, electricity
Machine can drive the first connecting portion motion, thus drives the second connecting portion and cantilever beam associated movement.
The present invention having the beneficial effects that compared to prior art: this notch cantilevered self-elevating drilling platform
There is lightweight, working performance and operating water depth is big, have deck effective area and variable load is big, cost
The advantage such as low, it is possible to operation under deepwater field and bad environments sea situation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the notch cantilevered self-elevating drilling platform of the present invention.
Fig. 2 is the schematic diagram of the spud leg mechanism of the notch cantilevered self-elevating drilling platform of the present invention.
Fig. 3 is the top view of the notch cantilevered self-elevating drilling platform of the present invention.
Fig. 4 is the schematic top plan view of the notch cantilevered self-elevating drilling platform of the present invention.
Fig. 5 is the schematic side view of the notch cantilevered self-elevating drilling platform of the present invention.
Fig. 6 is the A direction view in Fig. 5.
Fig. 7 is the schematic cross-section of cantilever beam.
Fig. 8 is the schematic cross-section of guide part.
Fig. 9 is the schematic cross-section of sticking department.
Detailed description of the invention
It is described more fully with example embodiment referring now to accompanying drawing.But, example embodiment can
Implement in a variety of forms, and be not understood as limited to embodiment set forth herein；On the contrary, it is provided that this
A little embodiments make the present invention more comprehensively and completely, and the design of example embodiment are passed on all sidedly
To those skilled in the art.In the drawings, in order to clearly, may be exaggerated the thickness of region and layer.?
Reference identical in figure represents same or similar structure, thus will omit their detailed description.
Additionally, described feature, structure or characteristic can be combined in any suitable manner one or
In more embodiments.In the following description, it is provided that many details thus provide the reality to the present invention
Execute fully understanding of example.It will be appreciated, however, by one skilled in the art that the technology of the present invention can be put into practice
Scheme and do not have in described specific detail one or more, or can use other method, constituent element,
Material etc..In other cases, known features, material or operation are not shown in detail or describe to avoid
The major technique intention of the fuzzy present invention.
The present invention provides a kind of notch cantilevered self-elevating drilling platform, and it is used for Offshore Operation, can
Adapt to relatively territory, deep-sea and severe sea condition.Notch cantilevered self-elevating drilling platform includes main hull 10, cantilever
Beam 20, drilling rig structure 30 and slipping mechanism 40.
As shown in Figures 1 to 7, the end of the ship stern of main hull 10 is provided with notch 11.Cantilever beam 20
Support on main hull 10, and cover notch 11, and can be along the longitudinal direction of main hull 10 at initial position
And moving beyond between position, when initial position, cantilever beam 20 is integrally located on main hull 10, can
Carrying out drillng operation in hull interior, when beyond position, cantilever beam 20 is at least part of beyond main hull
10, stretch out from the ship stern of main hull 10, drillng operation can be carried out outside hull.Drilling rig structure 30 sets
It is placed on cantilever beam 20.Slipping mechanism 40 includes that drive division the 41, first connecting portion 42 and second connects
Portion 43, the first connecting portion 42 is arranged at main hull 10, and the second connecting portion 43 is arranged at cantilever beam 20,
First connecting portion 42 engages with the second connecting portion 43, and motor can drive the first connecting portion 42 to move, from
And drive the second connecting portion 43 and cantilever beam 20 associated movement.
Fig. 5 show cantilever beam 20 and is in initial position, under the driving of slipping mechanism 40, and cantilever beam
20 move towards the ship stern of main hull 10 so that it is part is beyond main hull 10, therefore, on cantilever beam 20
Drilling rig structure 30 is in outside main hull 10, as shown in Figure 1.As shown in Figure 4, can limit and be positioned at
Operating area A1 in ship in notch 11, and the region outside hull is outboard operating area A2, when outstanding
Arm beam 20 is positioned at initial position or during without departing from the position of main hull 10, and drilling rig structure 30 is positioned at ship and makees
The top of industry region A1, can carry out drillng operation in this region；When cantilever beam 20 moves to beyond position
When putting, drilling rig structure 30 is positioned at outboard operating area A2, can carry out drillng operation in this region.
The present invention passes through to arrange notch 11 on main hull 10 and combine moveable cantilever beam 20 to make drilling well
Mechanism all can carry out drillng operation inside and outside hull, and job area is big.Drilling platforms phase with non-notch type
Ratio, in the case of operating area is identical, overhanging relative to main hull 10 of the cantilever beam 20 of the present invention
Away from little, overcome the shortcoming that cantilevered drilling platforms tilting moment is big, drilling well synthetic load is little, more adapt to
Operation under relatively territory, deep-sea and severe sea condition such that it is able to the marine site below drilling rig structure 30 is carried out drilling well work
Industry.Notch cantilevered self-elevating drilling platform can be carried out oil-gas exploration and open in the marine site about depth of water 137m
Outbreak industry, operating water depth, up to more than 450ft, drill capacity 10000m, possesses deep-well prospect pit, big position
Move cluster well and horizontal well drilling function.
Further, owing to this cantilever beam 20 outreach is little, therefore cantilever beam 20 length is programmable less,
Cantilever beam 20 weight more existing cantilevered drilling platforms is made to reduce by 10%.Further, notch 11 is offered
Also can alleviate the deadweight of drilling platforms, the floor space that afterbody notch 11 structure release cantilever beam 20 takies,
The floor space making cantilever beam 20 take reduces 55%, and drilling rod stockyard 150, deck area is up to 800m2,
It is strong that drilling well goods and materials store ability.
In sum, this notch cantilevered self-elevating drilling platform has lightweight, working performance and operation
The depth of water is big, have deck effective area and variable load is big, low cost and other advantages, it is possible at deepwater field and ring
Operation under the severe sea condition of border.The present invention helps lend some impetus to ocean engineering drilling equipment independent research, to breaking
Foreign technology monopolizes, and promotes China's marine engineering equipment to move towards high-end market significant, its technology
Level reaches international standards, and has good market prospect, and economic benefit is considerable.
In the present embodiment, as shown in Figure 4, main hull 10 uses high strength steel, for subtriangular many
Limit shape structure, the long 76.0m of type, molded breadth 75.6m, moldeed depth 9.5m, by a plurality of longitudinal bulkhead 12 and transverse bulkhead
13 are divided into multiple cabin, and the centrage of notch 11 is positioned on the longitudinal centre line of main hull 10, notch 11
A size of 13.5 meters × 18.76 meters.When cantilever beam 20 is positioned at main hull 10 inside, drilling rig structure 30
In the surface of notch 11, the drilling rod of drilling rig structure 30 can arrive seabed by notch 11, i.e. cantilever beam
20 just can carry out drillng operation in hull, and in ship, A1 longitudinal length in operating area is 8.85 meters.Outboard
Operating area A2 longitudinal length is 17.06 meters, and therefore, drillng operation region longitudinal direction total length is up to 25.9
Rice.Notch 11 is provided around reinforcement structure 15, it is ensured that Hull Strength.Reinforcement structure 15 be reinforcing plate and
Panel forms, and forms frame-type reinforcement structure with main hull 10.In notch, operating area can account for total operation area
The 34% of territory..
In the present embodiment, as it is shown in figure 5, drive division 41 can be motor, it is installed on by pedestal 44
Main hull 10, the first connecting portion 42 is gear, and it is connected with the output shaft of motor, the second connecting portion 43
For tooth bar, it is along the both sides being longitudinally disposed at cantilever beam 20 of cantilever beam 20, the both sides of cantilever beam 20
Second connecting portion 43 synchronizes to drive by corresponding drive division 41 and the first connecting portion 42.Second connecting portion
The length of 43 is depending on the move distance of cantilever beam 20.The form of first, second connecting portion is not limited to tooth
Wheel tooth bar coordinates, and can be also Worm Wheel System, and the frame mode being arbitrarily capable of transmission is all covered by
In protection scope of the present invention.
In the present embodiment, as shown in Figure 6,7, cantilever beam 20 is box-structure, and it includes a pair " work "
The longitudinal wall 21 of type and the parallel top layer deck 22 being connected between longitudinal wall 21 and deck of cellar 23, and
Can arrange multiple discontinuous between deck 24 according to equipment requirements, therefore, space availability ratio is high.This is right
The lower section of longitudinal wall 21 is provided with a pair support seat 25, and main hull 10 is provided with the biography corresponding with supporting seat 25
Dynamic portion 16, cantilever beam 20 is supported on driving section 16 by supporting seat 25, when cantilever beam 20 moves,
Support seat 25 to be synchronized with the movement with driving section 16.Driving section 16 for example, roller chain, conveyer belt etc..
In the present embodiment, such as Fig. 5, shown in 8, main hull 10 is additionally provided with at least one pair of guide part 17,
Every pair of guide part 17 is arranged at the both sides of driving section 16, and closes on support seat 25, the height of guide part 17
Degree is more than or equal to the height supporting seat 25.Therefore, when cantilever beam 20 moves on main hull 10,
It supports seat 25 can be by the guiding of both sides guide part 17, it is to avoid deviate.
In the present embodiment, main hull 10 is provided with multipair guide part 17, and the position of guide part 17 corresponds to
It is in the front portion of the cantilever beam 20 of initial position and middle part and ship stern.Thus in the motion of cantilever beam 20
Omnidistance offer guide effect.
In the present embodiment, such as Fig. 5, shown in 9, main hull 10 is additionally provided with at least one pair of sticking department 18,
Every a pair sticking department 18 includes a pair guide plate 181 and pair of locking plate 182, and guide plate 181 is set by this
Be placed in the both sides of driving section 16, and close on support seat 25, this to lockplate 182 respectively from this to guiding
The upper end of plate 181 extends to support the top of seat 25, and closes on the top supporting seat 25.
In the present embodiment, main hull 10 is provided with pair of locking portion 18, and the position of sticking department 18 corresponds to
Be in the middle part of the cantilever beam 20 of initial position, and corresponding to being in beyond the cantilever beam 20 of position before
Portion.Therefore, when be in the front portion of the cantilever beam 20 beyond position due to weightless it may happen that tilt time, this
The sticking department 18 of position can provide restriction and backstop, it is to avoid cantilever beam 20 topples.
In the present embodiment, guide part 17 and sticking department 18 all weld with main hull 10, and at main hull
10 lower surfaces have the rib of correspondence, to improve intensity.
In the present embodiment, as shown in Figure 5,6, notch cantilevered self-elevating drilling platform also includes that rig floor is sliding
Moving mechanism 50, it is installed on the bottom of drilling rig structure 30, is used for driving drilling rig structure 30 at cantilever beam 20
On along the transverse movement of main hull 10.Rig floor and derrick that cantilever beam 20 is arranged above can be moved by rig floor
Dynamic device is along cantilever beam 20 aft transverse rails transverse shifting, and maximum moving distance is ± 6.37 meters, bores
Well operations scope is big, efficiency is high.
In the present embodiment, as shown in Fig. 1,5,6, notch cantilevered self-elevating drilling platform also includes opening
Power platform 60, it is arranged at the bottom of cantilever beam 20, when cantilever beam 20 is in initial position, tension force
Platform 60 is in notch 11, does not extends out main hull 10.Tension platform 60 is used for ensureing that marine riser is opened
Force level, owing to notch 11 can accommodate tension platform 60 completely, when therefore hull is entered in cantilever beam 20 sliding
Tension platform 60 need not be promoted in cantilever beam 20, save Decanning tension platform 60 lifting device, joint
About equipment and running cost.
As it is shown on figure 3, cantilever beam 20 head end is provided with pipe stockyard 70, middle part is provided with cat road machine 80 and closes
Joint hangs 90, and drilling rig structure 30 includes rig floor 31 and derrick 32, and rig floor 31 and derrick 32 are tight by bolt
It is solidified as a whole, rig floor 31 can be provided with the drilling equipments such as iron driller, it is possible to realize increasingly automated drilling well.
In the present embodiment, as shown in Figure 1,3, the bow stern of notch cantilevered self-elevating drilling platform is provided with altogether
Three wedge brackets 100, are triangularly arranged, and are welded as a whole with main hull 10, and wedge bracket 100 is arranged
In main hull 10 baseline position higher above so that the lowering or hoisting gear 110 being installed on wedge bracket 100
Avoid wave attack effect when platform extreme draft with locking device 120, both reduce platform load
The most effectively protect equipment.Spud leg 130 is frame of triangular bridge-type construction, solid through each from top to bottom
In pile frame 100, the more circular shoe through lower end is ultimately transferred to seabed.
The deck of main hull 10 is provided with 3 Platform lifting devices 140, and deck is arranged drilling rod stockyard 150,
Storage space is up to 800m2.The bow of platform is arranged chooses formula life building 160 and helicopter platform 170,
It is disposed with emergency generator 180, after ensureing cabin water inlet, moreover it is possible to provide on 4 layers of deck in life building
Power source.Stern spud leg 130 is provided with pre-submersible ballast pump group 190, pre-for the pitching pile rear platform that puts in place
Ballast.Four set ground tackles 200 are set, anchoring location when platform pitching pile.
The notch cantilevered self-elevating drilling platform of the present embodiment is shifted by towage, is put a pitching pile, precompressed liter
The flow process circulation work such as ship, drillng operation, fall ship pile pulling, it is achieved at zones of different drillng operation, specifically
As described below.
When notch cantilevered self-elevating drilling platform towage is to assignment marine site, first starting anchoring dress
Put 200, complete the pre-determined bit of drilling platforms.Start fastening system 120 and stake transferred by lowering or hoisting gear 110
Lower limb 130 and shoe 131, complete pitching pile operation.Start pre-submersible ballast pump group 190 and sea water is squeezed into master
In hull 10 ballast tank, carrying out platform precompressed, sea water is entered marine by precompressed again after completing, adjust
Start lowering or hoisting gear 110 after platform center of gravity, platform is raised to predetermined operation height.
After precompressed liter ship completes, this notch cantilevered self-elevating drilling platform can start prospect pit or drilling well is made
Industry.Use Platform lifting devices 140 that by drilling rod stockyard 150, drilling rod is transferred to pipe stockyard 70, then by joint
Hang 90 and drilling rod is positioned over cat road machine 80, drilling rod is delivered on the rig floor 31 of drilling rig structure 30, for boring
Well uses.First carry out operation in main hull 10 during operation, then carry out hull external procedure, according to well head position
Put requirement, start the slipping mechanism 40 of cantilever beam 20, make cantilever beam 20 along being arranged on main hull 10
Base 19 to stern sliding, or start rig floor slipping mechanism 50 realize drilling rig structure 30 rig floor 31,
Derrick 32 slides laterally on the afterbody track 26 of cantilever beam 20, until the center of turntable pair of rig floor 31
Accurate predetermined pithead position, can start exterior domain drillng operation in hull.When cantilever beam 20 is overhanging, by locking
The lockplate 182 determining top, portion 18 realizes locking up and down, slipping mechanism 40 realize seesawing, protect
The safety of the card overhanging operation of cantilever beam 20.
After platform completes drillng operation, it is again started up rig floor slipping mechanism 50 and the sliding plane of cantilever beam 20
Structure 40, makes drilling rig structure 30 and cantilever beam 20 reset.Then locking device 120 and lowering or hoisting gear are started
110, carry out dropping ship pile pulling operation, until shoe reaches towing condition predetermined altitude away from sea bed, by platform
Towage carries out operation to next operating area.
In sum, this notch cantilevered self-elevating drilling platform has lightweight, working performance and operation
The depth of water is big, have deck effective area and variable load is big, low cost and other advantages, it is possible at deepwater field and ring
Operation under the severe sea condition of border.The present invention helps lend some impetus to ocean engineering drilling equipment independent research, to breaking
Foreign technology monopolizes, and promotes China's marine engineering equipment to move towards high-end market significant, its technology
Level reaches international standards, and has good market prospect, and economic benefit is considerable.
Although exemplary embodiment describing the present invention with reference to several, it is to be understood that, term used is
Illustrate and exemplary and nonrestrictive term.Owing to the present invention can be embodied as in a variety of forms
Without departing from invention spirit or essence, it should therefore be appreciated that above-described embodiment be not limited to any aforesaid carefully
Joint, and should explain widely in the spirit and scope that appended claims are limited, therefore fall into right
Whole changes and remodeling in requirement or its equivalent scope all should be appended claims and contained.
Claims (10)
1. a notch cantilevered self-elevating drilling platform, including:
Main hull, the end of its ship stern is provided with notch；
Cantilever beam, it is supported on main hull, and covers notch, and can exist along the longitudinal of main hull
Initial position and moving beyond between position, when initial position, cantilever beam is integrally located on main hull,
When beyond position, cantilever beam is at least part of beyond main hull, stretches out from the ship stern of main hull；
Drilling rig structure, it is arranged on cantilever beam；And
Slipping mechanism, including drive division, the first connecting portion and the second connecting portion, the first connecting portion is arranged at
Main hull, the second connecting portion is arranged at cantilever beam, the first connecting portion and the engagement of the second connecting portion, motor energy
Enough drive the first connecting portion motion, thus drive the second connecting portion and cantilever beam associated movement.
2. notch cantilevered self-elevating drilling platform as claimed in claim 1, wherein, drive division is electricity
Machine, it is installed on main hull by pedestal, and the first connecting portion is gear, and it is connected with the output shaft of motor,
Second connecting portion is tooth bar, and it is along the both sides being longitudinally disposed at cantilever beam of cantilever beam, the two of cantilever beam
Side the second connecting portion synchronizes to drive by corresponding drive division and the first connecting portion.
3. notch cantilevered self-elevating drilling platform as claimed in claim 2, wherein, cantilever beam includes
A pair longitudinal wall and the parallel top layer deck being connected between longitudinal wall, deck of cellar and discontinuous middle first
Plate, this is provided with a pair support seat to the lower section of longitudinal wall, and main hull is provided with the driving section corresponding with supporting seat,
Cantilever beam on driving section, during cantilever beam motion, supports seat fortune Tong Bu with driving section by support seat supports
Dynamic.
4. notch cantilevered self-elevating drilling platform as claimed in claim 3, wherein, on main hull also
Being provided with at least one pair of guide part, every pair of guide part is arranged at the both sides of driving section, and closes on support seat, leads
To the height in portion more than or equal to the height supporting seat.
5. notch cantilevered self-elevating drilling platform as claimed in claim 4, wherein, main hull sets
Have multipair guide part, the position of guide part corresponding to be in the front portion of cantilever beam of initial position and middle part with
And ship stern.
6. notch cantilevered self-elevating drilling platform as claimed in claim 3, wherein, on main hull also
Being provided with at least one pair of sticking department, every a pair sticking department includes a pair guide plate and pair of locking plate, and this is to leading
Be arranged at the both sides of driving section to plate, and close on support seat, this to lockplate respectively from this to guide plate
Upper end extends to support the top of seat, and closes on the top supporting seat.
7. notch cantilevered self-elevating drilling platform as claimed in claim 6, wherein, main hull sets
Having pair of locking portion, the position of sticking department is corresponding to being in the middle part of the cantilever beam of initial position；Guide part,
Sticking department welds with main hull, has the rib of correspondence at main hull lower surface.
8. notch cantilevered self-elevating drilling platform as claimed in claim 1, wherein, the center of notch
Line is positioned on the longitudinal centre line of main hull, and the side face of notch is provided with frame-type reinforcement structure, makees in notch
The 34% of Zhan Zong operating area, industry region.
9. notch cantilevered self-elevating drilling platform as claimed in claim 1, wherein, notch cantilevered
Self-elevating drilling platform also includes rig floor slipping mechanism, and it is installed on the bottom of drilling rig structure, is used for driving
Drilling rig structure is on a cantilever beam along the transverse movement of main hull.
10. notch cantilevered self-elevating drilling platform as claimed in claim 1, wherein, notch cantilever
Formula self-elevating drilling platform also includes tension platform, and it is arranged at the bottom of cantilever beam, when cantilever beam is in
During initial position, tension platform is in notch, does not extends out main hull.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412540.XA CN106005293A (en) | 2016-06-13 | 2016-06-13 | Notch cantilevered type self elevating type drilling platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610412540.XA CN106005293A (en) | 2016-06-13 | 2016-06-13 | Notch cantilevered type self elevating type drilling platform |
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| CN106005293A true CN106005293A (en) | 2016-10-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112119006A (en) * | 2018-03-14 | 2020-12-22 | 株式会社吉田组 | Offshore facility and method of constructing the same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112119006A (en) * | 2018-03-14 | 2020-12-22 | 株式会社吉田组 | Offshore facility and method of constructing the same |
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