CN103168134A - Ice worthy jack-up drilling unit secured to the seafloor - Google Patents
Ice worthy jack-up drilling unit secured to the seafloor Download PDFInfo
- Publication number
- CN103168134A CN103168134A CN2011800504582A CN201180050458A CN103168134A CN 103168134 A CN103168134 A CN 103168134A CN 2011800504582 A CN2011800504582 A CN 2011800504582A CN 201180050458 A CN201180050458 A CN 201180050458A CN 103168134 A CN103168134 A CN 103168134A
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- China
- Prior art keywords
- ice cube
- shell
- ice
- spud leg
- boring island
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/0017—Means for protecting offshore constructions
- E02B17/0021—Means for protecting offshore constructions against ice-loads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
- E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
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- 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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/02—Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling
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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/008—Drilling ice or a formation covered by ice
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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
- B63B35/08—Ice-breakers or other vessels or floating structures for operation in ice-infested waters; Ice-breakers, or other vessels or floating structures having equipment specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0039—Methods for placing the offshore structure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0039—Methods for placing the offshore structure
- E02B2017/0043—Placing the offshore structure on a pre-installed foundation structure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0056—Platforms with supporting legs
- E02B2017/006—Platforms with supporting legs with lattice style supporting legs
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0056—Platforms with supporting legs
- E02B2017/0073—Details of sea bottom engaging footing
- E02B2017/0082—Spudcans, skirts or extended feet
Abstract
The invention relates to an ice worthy jack up rig that may extend the drilling season in shallow water off shore Arctic or ice prone locations. The inventive rig would work like a conventional jack up rig while in open water with the hull jacked up out of the water. However, in the event of ice conditions, the legs are held in place by cans embedded in the sea floor to resist lateral movement of the rig and the hull is lowered into the water into an ice defensive configuration. The hull is specifically shaped with an ice bending surface to bend and break up ice that comes in contact with the hull while in the ice defensive configuration.
Description
Technical field
The present invention relates to a kind ofly in the movably offshore drilling unit (offshore drilling unit) of the typical degree of depth less than the shallow water probing hydrocarbon of 400 feet, often be called " self lift type " drilling unit or offshore boring island.
Background technology
To hydrocarbon forever in continuous seeking, had been found that a lot of oil and gas reserves in the past 150 years.Developed a lot of technology to find new deposit and resource, in order to look for new discovery, tellurian a lot of areas are detected.Few people think can also be in the residential community and the place that can be easy to arrive find any large-scale, undiscovered resource.Yet, found new large-scale deposit in having more challenge and very unattainable zone.
A kind of zone that has a extensive future is arctic greater coasting area.Yet the arctic is remote and cold, and the ice cube on the water surface has all formed sizable challenge concerning the exploration of hydrocarbon and production.For many years, generally all think in order to find a profitable oil well, must six oil wells that no profits came in of probing.If this situation is true, the probing of people's oil well of wishing all that no profits came in is not expensive so.Yet in the arctic, rarely what is not expensive.
Now, in the shallow water territory in the place of cold weather as the arctic, self lift type or removable offshore drilling unit (MODU) at the shorter water surface of time without using 45 to 90 days the summer of ice (open water).The beginning in prediction probing season and the time of end are a game of chances, and must pay a lot of effort and when can be drawn to safely drilling position and when can begin probing to determine the self lift type drilling unit.Once you begin probing, completing as soon as possible drilling well is quite urgent thing, to avoid having to interrupt and cancel drilling well owing to having occured to freeze before completing drilling well.Even in several time-of-weeks of the water surface without ice, in offshore boring island position in place, floating ice is very large for self-elevating drilling platform harm, the spud leg of self-elevating drilling platform also is exposed to outer and very easily is damaged.
Self-elevating drilling platform be movably, platform self lift type, that carry out offshore drilling and well maintenance, this offshore boring island is equipped with spud leg, this spud leg is arranged to be reduced to the seabed and then shell is risen on the water surface.Self-elevating drilling platform comprises that typically probing and/or well maintenance equipment, spud leg are from rising system, crewman sitting room, loading and unloading equipment, large-sized liquefied material storage area, helicopter alighting deck and other relevant devices and equipment.
Self-elevating drilling platform is designed to be drawn to situ of drilling well and rises on the water surface, therefore thereby make the wave active force of seawater only affect the spud leg with less cross section, allow the wave active force in the situation that do not impose on the remarkable momentum of self-elevating drilling platform and pass by.Yet, the defence capability that the spud leg of self-elevating drilling platform does not almost clash into floating ice, any have the floating ice of certain scale to cause structural destruction and/or offshore boring island is pushed away original position one or more spud legs.Before fixing and waste disposal, this type event occuring if suspend and completed suitably at drillng operation, hydrocarbon may occur so leak.Even this type of leakage of little risk is all unacceptable completely concerning regulator and the public in oil and natural gas industry.
Therefore, in case determine in shorter season this time after the potential profitable oil well of probing, introduce possibly very large-scale, based on the production system of gravity or similar structure, and they are set in the long-time process of seabed to be used for probing and to produce hydrocarbon.This structure based on gravity is very large-scale and very expensive, and is constructed to and can stands ice load the whole year.
Summary of the invention
The present invention relates more specifically to a kind of iceproof self-elevating drilling platform (ice worthy jack-up rig) for drill hydrocarbon under the condition that may freeze at greater coasting area, described offshore boring island comprises floating shell, and described floating shell has the deck of the opposed flattened that comprises the section of being located thereon.The ice cube bending shape that described floating shell also comprises along its underpart and extends around the periphery of described shell, wherein said ice cube bending shape is from the region extension of the close deck level height of described shell and extend downwardly near the bottom of described shell, and one ice cube be folded to section, described ice cube is folded to section and extends around the periphery of the bottom of described shell, to guide ice cube round described shell rather than it is directed under described shell.Described offshore boring island comprises at least three spud legs, within described spud leg is positioned at the periphery of bottom of described floating shell, wherein, described spud leg is arranged to be promoted to leave the seabed, thereby make it possible to the towing of described offshore boring island through shallow water area, and described spud leg also can extend to described seabed and further extend with described shell is local or all rise on the water surface.Thereby device is related with each spud leg makes the described iceproof self-elevating drilling platform can be floating by the buoyancy of described shell in order to described spud leg is promoted aweigh from rising, also in order to will shift the seabed onto under described spud leg, and when floating ice threatens described offshore boring island with described shell local lifting on the water surface, and when not having ice cube, described shell is all risen on the water surface.A plurality of piling brackets are fixed to the seabed and are arranged to receive and clamp described spud leg when described spud leg extend to the seabed.
the invention still further relates to a kind of for the method in the waters drilling well that is easy to freeze, described method comprises: a floating shell is provided, described floating shell has the deck of the opposed flattened of the section of being located thereon, and has the ice cube bending shape along its underpart, wherein said ice cube bending shape is from the region extension of the close deck level height of described shell and extend downwardly near the bottom of described shell, and one ice cube be folded to section, described ice cube is folded to section and extends with round described shell guiding ice cube rather than it is directed under described shell around the periphery of the bottom of described shell.Within at least three spud legs are positioned in the periphery of bottom of described shell.Fall each spud leg, make the footing on described spud leg bottom engage with the bracket that is fixed to the seabed, and when ice cube does not constitute a threat to for described offshore boring island during the situ of drilling well drilling well at described offshore boring island, described shell is all risen on the water surface.Further described shell is dropped in water to be in ice cube defence configuration, thereby make described ice cube bending shape across the sea downward-extension so that collide the ice cube bending of described offshore boring island, so that described ice cube sinks under the water surface and bear in the position that ice cube flows through described offshore boring island the bending power that ice cube is broken.
Description of drawings
Explanation with reference to carrying out below in conjunction with accompanying drawing can obtain to the present invention and the more complete understanding of advantage of the present invention, wherein:
Fig. 1 is the elevation of the first embodiment of the present invention, and wherein offshore boring island swims in water, and can be drawn to situ of drilling well;
Fig. 2 is the elevation of the first embodiment of the present invention, and wherein offshore boring island swims in water, and spud leg has been fallen to be connected with the piling bracket that is fixed to the seabed (piled socket);
Fig. 3 is the elevation of the first embodiment of the present invention, and wherein offshore boring island is thus lifted on the water surface and drills on open water via moon pool (ship trap) being used for;
Fig. 4 is the elevation for the defence configuration of drilling well during potential icing environment of being in of the first embodiment of the present invention, and wherein, offshore boring island has dropped in ice/water interface partly, but still by its spud leg supporting; And
Fig. 5 is local amplification front elevation, and it shows an end of the first embodiment of the present invention that is in Fig. 3 configuration, and its medium floe moves in face of this offshore boring island.
The specific embodiment
Now then device of the present invention or preferred embodiment are elaborated, should be appreciated that in other structural configuration and also can embody feature of the present invention and concept, scope of the present invention is not limited to the embodiment that describes or illustrate here.Scope of the present invention is only by the circumscription of following claim.
As shown in Figure 1, the iceproof self-elevating drilling platform is generally by arrow 10 expressions.Self-elevating drilling platform 10 is depicted as its shell 20 and swims in large marine and its spud leg 25 and be in during lift structure arranges in Fig. 1, wherein extends above the deck 21 of major part at shell 20 of spud leg 25 length in this lift structure is arranged.On deck 21 is derrick 30 for drilling well.In configuration as shown in Figure 1, self-elevating drilling platform 10 can be explored the place from one and be drawn to another exploration place and be drawn to another shore base to be used for maintenance and other seashore services from a shore base.
When self-elevating drilling platform 10 was drawn to the situ of drilling well that is arranged in general shallow water, spud leg 25 is fallen via the notch in shell 20 (enclosing well) 27, and the piling bracket 35 on seabed 15 engaged with pre-determined bit as shown in Figure 2 until be positioned at the footing 26 of bottom of spud leg 25.In a preferred embodiment, footing 26 has the shoe 28 that is fixed on footing 26, and this shoe 28 is arranged to directly by putting the seabed.Yet in the present invention, shoe 28 directly is connected with the piling bracket 35 that anchors to the seabed.Piling bracket 35 is being fixed to the seabed by the pileworks 36 that prevent bracket 35 risings or the 15 further sinkings to the seabed after quite accurately being positioned at seabed 15.In case shoe 28 engages with bracket 35, clamping element 38 is closed so that shoe 28 is locked onto bracket 35 on the top section of shoe 28.Piling bracket 35 is guaranteed that additionally offshore boring island 10 engages with shell 20 at ice cube and still can be remained on drilling position when pushing shell 20.
In the situation that shoe 28 is locked in piling bracket 35, shell 20 rises on the water surface as shown in Figure 3.In the situation that shell 20 fully rises on the water surface, the wave effect that is similar to the so large-scale floating object of shell 20 with shock is compared, and any wave active force and billow are all more easily broken through spud leg 25.Can not begin drillng operation with conventional process when there is no ice cube in this zone.
By adopting the configuration that ice cube is defensive, shell is in water as shown in Figure 4, iceproof self-elevating drilling platform 10 also is designed to defend floating ice.In Fig. 4, ice cube trends towards killing the sea and billow, so that sea 12 seems danger is not high, yet the risk factor of marine environment is only changed and do not weakened.
When iceproof self-elevating drilling platform 10 adopted the configuration that its ice cube is defensive, shell is in water, shell 20 was reduced in water contact with water, and still not dropping to shell 20 can begin floating degree.Most of weight of offshore boring island 10 preferably remains on spud leg 25, remains on situ of drilling well with the position of opposing ice stream any pressure that may cause with offshore boring island 10.Offshore boring island 10 is fallen, thereby makes intilted ice cube bending surface 41 stride across sea 12 or ice/water interface to engage with any floating ice that may touch offshore boring island 10.
The ice cube bending surface 41 that tilts extends downwardly into neck line 44 from the shoulder 42 of the edge that is positioned at deck 26.Ice cube jet deflector 45 is from neck line 44 to downward-extension.Therefore, when the floating ice shown in 51 touches offshore boring island 10, ice cube bending surface 41 makes the leading edge of floating ice 51 sink under sea 12 and to it and applies sizable bending power, and this sizable bending power makes pack fragment into the ice cube that size is less, that destructive power is less, coefficient of injury is lower.For example, can expect that the hundreds of foot even may can touch offshore boring island 10 by several miles so large floating ices.If floating ice fragments into longest dimension less than the fritter of 20 feet, so this fritter can be from offshore boring island 10 surrounding processes, and hidden danger is obviously less.
Ice cube has the huge compressive strength that is in 4 to 12MPa scopes, but the bending resistance folding endurance is less, and typically flexural strength is positioned at 0.3 to 0.5MPa scope.The power of the floating ice 51 that moves along sea 12 as shown, makes its leading edge slide under sea 12 and makes section 52 fractures.In the situation that floating ice 51 fragment into such as section 52 and ice cube 53 than small ice floe, trend towards in the situation that do not apply the impact of pack or power was floated offshore boring island 10 and floating around offshore boring island 10 than away minor segment.Preferably, ice cube is not forced under the evener of bottom of shell 20, and ice cube jet deflector 45 makes ice cube turn to drift about around the side of shell 20.If ice cube is really thick, ice cube jet deflector 45 be arranged to than the more precipitous angle in ice cube bending surface 41 to downward-extension, and increase is acted on bending power on floating ice.At ice cube jet deflector 45 places, the ice cube jet deflector is positioned to evener from the bottom of shell 20 to downward-extension.In optional structural configuration, turn of bilge is the evener in the bottom, place, bottom of ice cube jet deflector 45.
For further opposing floating ice may be applied to power on offshore boring island 10, the footing 26 of spud leg can be arranged to be connected with the shoe 28 that is arranged on the seabed, thereby make when floating ice collision ice cube bends surperficial 41, in fact spud leg 25 will pin down shell 20 and force floating ice bending and the lifting force of opposing floating ice---and the lifting force of this floating ice is in the situation that the extreme nearside that may lift offshore boring island 10, and by offshore boring island being overthrown as fulcrum or pivot with the footing 26 of the opposite side of offshore boring island 10.Shoe in the seabed becomes known for other and uses, and footing 26 can comprise that suitable connector disassembles to be connected in shoe and from shoe on request.
May should be noted that: according to the probing just carried out at that time progress, the ice cube defence configuration of shell water that is transformed into as shown in Figure 4 from as shown in Figure 3 traditional open water drilling well configuration needs fairly large planning and adjustment.Although some equipments can adapt to the change of deck 21 height, also need to dismantle or reconstruct other equip to adapt to new high degree apart from seabed 15.
Iceproof self-elevating drilling platform 10 is designed to as operating without traditional self-elevating drilling platform of icing in the sea, still also is designed to defend the position to sink in water with ice cube, then again obtains traditional attitude or configuration when the wave active force becomes hidden danger.The possibility of ice cube bending and fracture is provided by the shape (intensity that also has shell 20) of shell 20.
Also should be noted that spud leg 25 and notch 27(wherein, spud leg 25 is connected to shell 20 by notch 27) all be positioned at the periphery of ice cube jet deflector 45 within, thereby when offshore boring island 10 was in as shown in Figure 4 ice cube defense attitude configuration (configuration that sometimes is in water also referred to as shell), floating ice unlikely touched spud leg.In addition, offshore boring island 10 needn't be processed each floating ice and threaten, and this has improved the profit of oil and gas company significantly.If offshore boring island 10 can extend short one month with probing season, will be 50% raising so in some zones that are easy to freeze, therefore provide the benefit of saving cost to this industry truely.
At last, should be noted that the discussion to any reference is not to admit that it is prior art of the present invention, particularly disclose the reference of date after the application's priority date.Simultaneously, following every and each claim is brought in this detailed description or explanation hereby with as additional embodiment of the present invention.
Although described some systems and processing here in detail, be to be understood that on the basis that does not break away from the spirit and scope of the present invention that limited by following claim and can carry out multiple modification, replacement and change.Those of skill in the art can study preferred embodiment, and recognize with described herein be not duplicate other modes of the present invention that realize.Within being intended that of inventor all brought modification of the present invention and equivalent the scope of claim into, the scope that is not intended to limit the present invention of manual, summary and accompanying drawing simultaneously.The present invention attempts to expand to the same wide in range with following claim and their equivalent especially.
Claims (12)
1. one kind is used for drilling the iceproof self-elevating drilling platform of hydrocarbon at greater coasting area under potential ice-formation condition, and described offshore boring island comprises:
Floating shell, described floating shell has the deck of the opposed flattened of the section of being located thereon, and have along its underpart and around the periphery of described shell downwards and the ice cube bending shape that extends internally, wherein said ice cube bending shape is from the region extension of the close deck level height of described shell and extend downwardly near the bottom of described shell;
Ice cube is folded to section, and described ice cube is folded to section and extends around the periphery of the bottom of described shell, to guide ice cube round described shell rather than it is directed under described shell;
At least three spud legs, within described spud leg is positioned at the periphery of bottom of described floating shell, wherein, described spud leg is arranged to can promote aweigh, thereby make it possible to the towing of described offshore boring island through shallow water area, and described spud leg also can extend to the seabed and further extend with described shell is local or all rise on the water surface;
From rising device, described related with each spud leg from rising device, in order to described spud leg is promoted aweigh, thereby make buoyancy that described iceproof self-elevating drilling platform can be by described shell and floating, also in order to will shift the seabed onto under described spud leg, and when floating ice threatens described offshore boring island with described shell local lifting on the water surface, and all rise to described shell on the water surface when not having ice cube; And
A plurality of piling brackets, described piling bracket are fixed to the seabed and are arranged to receive and clamp described spud leg when described spud leg extend to the seabed.
2. iceproof self-elevating drilling platform according to claim 1, also comprise anchor mechanism, the described anchor mechanism power that extraly to resist floating ice is applied to described offshore boring island related with the footing of each spud leg.
3. iceproof self-elevating drilling platform according to claim 1 and 2, is characterized in that, described ice cube bending surface is from the less neck alignment of size and be tilted out to larger-size shoulder.
4. iceproof self-elevating drilling platform described according to any one in aforementioned claim, is characterized in that, the surperficial in the vertical direction of described ice cube bending extends at least 8 to 10 meters or more.
5. iceproof self-elevating drilling platform according to claim 4, is characterized in that, described ice cube bending surface and vertical direction angulation are in the scope of 30 ° to 60 °.
6. iceproof self-elevating drilling platform described according to any one in aforementioned claim, is characterized in that, surperficial a plurality of opposed flattened, the section that tilt that extends around the periphery of described offshore boring island that comprise of described ice cube bending.
7. iceproof self-elevating drilling platform described according to any one in aforementioned claim, it is characterized in that, each spud leg is arranged to be clamped by the piling bracket, and each piling bracket is fixed to the seabed to resist the movement of described piling bracket on all directions via one or more pileworks.
8. method that is used in the waters drilling well that is easy to freeze, described method comprises:
One offshore boring island is provided, described offshore boring island has floating shell and ice cube is folded to section, described floating shell have the section of being located thereon opposed flattened the deck and along the ice cube bending shape of its underpart, wherein said ice cube bending shape is from the region extension of the close deck level height of described shell and extend downwardly near the bottom of described shell, and described ice cube is folded to section and extends with round described shell guiding ice cube rather than ice cube is directed under described shell around the periphery of the bottom of described shell;
At least three spud legs are provided, within described spud leg is positioned at the periphery of bottom of described shell,
Fall each spud leg, make the footing on described spud leg bottom engage with the bracket that is fixed to the seabed, and when ice cube does not constitute a threat to for described offshore boring island during the situ of drilling well drilling well at described offshore boring island, all rise to described shell on the water surface;
Described shell is dropped in water to be in ice cube defence configuration, thereby make described ice cube bending shape on the sea and under extend, so that collide the ice cube bending of described offshore boring island, so that described ice cube sinks under the water surface, and bear in the position that ice cube flows through described offshore boring island the bending power that ice cube is broken; And
Via described offshore boring island drilling well.
9. method according to claim 8, also comprise by one or more pileworks, described bracket being fixed to the step in seabed.
10. according to claim 8 or 9 described methods, it is characterized in that, described ice cube bending surface extends to the neck line from shoulder, described shell is dropped to step in water more specifically comprise described shell being dropped in water so that described neck line is positioned under the sea at least 4 meters and described shoulder and be positioned on the sea at least 7 meters.
11. the described method of any one according to claim 8 to 10 also comprises the step that when the harmfulness of floating ice reduces, described shell is risen on the water surface.
12. one kind is used for the method drill in the waters that is easy to freeze, described method comprises the described offshore boring island of any one in use according to claim 1 to 7.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40549710P | 2010-10-21 | 2010-10-21 | |
| US61/405,497 | 2010-10-21 | ||
| US13/277,791 | 2011-10-20 | ||
| US13/277,791 US20120128426A1 (en) | 2010-10-21 | 2011-10-20 | Ice worthy jack-up drilling unit |
| PCT/US2011/057212 WO2012054801A1 (en) | 2010-10-21 | 2011-10-21 | Ice worthy jack-up drilling unit secured to the seafloor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103168134A true CN103168134A (en) | 2013-06-19 |
Family
ID=46262355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800504582A Pending CN103168134A (en) | 2010-10-21 | 2011-10-21 | Ice worthy jack-up drilling unit secured to the seafloor |
Country Status (6)
| Country | Link |
|---|---|
| KR (1) | KR20130139932A (en) |
| CN (1) | CN103168134A (en) |
| CA (1) | CA2810902A1 (en) |
| RU (1) | RU2013123020A (en) |
| SG (1) | SG189056A1 (en) |
| WO (1) | WO2012054801A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102009247B1 (en) * | 2017-09-21 | 2019-08-09 | 한국해양과학기술원 | Topside deck mounting guidance device and operation method thereof and installing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602895A (en) * | 1982-06-15 | 1986-07-29 | Oy Wartsila Ab | Drilling platform |
| CN1132535A (en) * | 1993-09-30 | 1996-10-02 | 国际壳牌研究有限公司 | Offshore platform structure and reusable foundation pile sleeve for use with such a structure |
| US5807028A (en) * | 1995-06-16 | 1998-09-15 | Marine Structure Consultants (Msc) B.V. | Bottom supporting construction for a leg end of a displaceable jack-up platform |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4102144A (en) * | 1977-05-31 | 1978-07-25 | Global Marine, Inc. | Method and apparatus for protecting offshore structures against forces from moving ice sheets |
| US4434741A (en) * | 1982-03-22 | 1984-03-06 | Gulf Canada Limited | Arctic barge drilling unit |
| US5445476A (en) * | 1993-09-30 | 1995-08-29 | Shell Oil Company | Reusable offshore platform jacket |
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2011
- 2011-10-21 KR KR1020137009993A patent/KR20130139932A/en not_active Application Discontinuation
- 2011-10-21 SG SG2013021340A patent/SG189056A1/en unknown
- 2011-10-21 CA CA2810902A patent/CA2810902A1/en not_active Abandoned
- 2011-10-21 RU RU2013123020/03A patent/RU2013123020A/en not_active Application Discontinuation
- 2011-10-21 CN CN2011800504582A patent/CN103168134A/en active Pending
- 2011-10-21 WO PCT/US2011/057212 patent/WO2012054801A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602895A (en) * | 1982-06-15 | 1986-07-29 | Oy Wartsila Ab | Drilling platform |
| CN1132535A (en) * | 1993-09-30 | 1996-10-02 | 国际壳牌研究有限公司 | Offshore platform structure and reusable foundation pile sleeve for use with such a structure |
| US5807028A (en) * | 1995-06-16 | 1998-09-15 | Marine Structure Consultants (Msc) B.V. | Bottom supporting construction for a leg end of a displaceable jack-up platform |
Also Published As
| Publication number | Publication date |
|---|---|
| SG189056A1 (en) | 2013-05-31 |
| RU2013123020A (en) | 2014-11-27 |
| CA2810902A1 (en) | 2012-04-26 |
| WO2012054801A1 (en) | 2012-04-26 |
| KR20130139932A (en) | 2013-12-23 |
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Application publication date: 20130619 |