CN103180514A - Ice worthy jack-up drilling unit with gas agitation and leg ice shields - Google Patents
Ice worthy jack-up drilling unit with gas agitation and leg ice shields Download PDFInfo
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- CN103180514A CN103180514A CN2011800504703A CN201180050470A CN103180514A CN 103180514 A CN103180514 A CN 103180514A CN 2011800504703 A CN2011800504703 A CN 2011800504703A CN 201180050470 A CN201180050470 A CN 201180050470A CN 103180514 A CN103180514 A CN 103180514A
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- 238000005553 drilling Methods 0.000 title claims abstract description 56
- 238000013019 agitation Methods 0.000 title 1
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- 238000005452 bending Methods 0.000 claims abstract description 31
- 238000007667 floating Methods 0.000 claims description 44
- 230000001012 protector Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 239000004215 Carbon black (E152) Substances 0.000 claims description 7
- 229930195733 hydrocarbon Natural products 0.000 claims description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims description 7
- 239000013535 sea water Substances 0.000 claims description 7
- 230000008014 freezing Effects 0.000 claims description 6
- 238000007710 freezing Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 6
- 239000003129 oil well Substances 0.000 description 5
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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
- 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
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
- E02B1/003—Mechanically induced gas or liquid streams in seas, lakes or water-courses for forming weirs or breakwaters; making or keeping water surfaces free from ice, aerating or circulating water, e.g. screens of air-bubbles against sludge formation or salt water entry, pump-assisted water circulation
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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
- 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/12—Underwater drilling
-
- 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
- E02B2017/0056—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
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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 packaged type 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 most area is detected.Few people think can also be near the residential community and the place that can be easy to arrive find any large-area, undiscovered resource.Yet, found new large tracts of land deposit in having more challenge and very unattainable zone.
The zone that one prospective is wide 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.
At present, in the shallow water in the place of cold weather as the arctic, self lift type or packaged type offshore drilling unit (MODU) at the shorter water surface of time without using approximately 45 to 90 days the summer of ice (open water).Beginning and the end in prediction probing season 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, the position floating ice in place at offshore boring island is also very large for self-elevating drilling platform harm, and the spud leg of self-elevating drilling platform (leg) 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 platform 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 typically comprises probing and/or well maintenance equipment, spud leg jacking 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, thereby the wave active force of seawater only affects the spud leg with quite little cross section, therefore allows the wave active force in the situation that do not make self-elevating drilling platform that significantly mobile passing by occurs.Yet the spud leg of self-elevating drilling platform clashes into floating ice does not almost have defence capability, and 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 having occured 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 treatment of seabed to be used for probing and to produce hydrocarbon.These structures based on gravity are very large-scale and very expensive, can stand ice load the whole year but be constructed to.
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 potential ice-formation condition at greater coasting area, described offshore boring island comprises floating shell, and described floating shell has the deck of the opposed flattened of the section of being located thereon.Described floating shell also comprises along its underpart and ice cube bending shape that extend 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 truss framed legs, within described spud leg is positioned at the periphery of bottom of described shell, wherein, described spud leg is arranged to can promote aweigh, thereby can be with 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.Related with each spud leg from rising device, thereby so that being promoted, described spud leg make aweigh the described iceproof self-elevating drilling platform can be floating by the buoyancy of described shell, also with shift the seabed under described spud leg onto 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.Described offshore boring island comprises spud leg ice cube protector so that truss framed leg is not subjected to the evil of ice cube, comprises that also the gas stirring system is to stir near the seawater described spud leg and to slow down near the problem of freezing described spud leg.
the invention still further relates to a kind of for the method in the waters drilling well of easily freezing, described method comprises: provide a floating shell and an ice cube to be 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, , 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 be directed under described shell.Within at least three truss framed legs were positioned in the periphery of bottom of described shell, wherein each spud leg comprised the column of a plurality of vertical directions orientations that connect by transverse member and is arranged on the ice cube protector of avoiding the evil of ice cube between described column for the protection of described transverse member.Fall each spud leg, so that the footing on bottom described spud leg engages with the seabed, and when ice cube did not constitute a threat to for described offshore boring island during the situ of drilling well drilling well at described offshore boring island, each spud leg all rose to described shell 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 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 ice cube the flow through position of described offshore boring island the bending power that ice cube is broken.Near described spud leg seawater is stirred to slow down the problem of freezing near described spud leg.
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 is thus lifted to and is used on the water surface drilling on open water via moon pool;
Fig. 3 is the elevation for the defence configuration of drilling during potential ice-formation condition 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;
Fig. 4 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 just moves in face of this offshore boring island;
Fig. 5 is the top view of the spud leg of offshore boring island, and wherein the first embodiment of spud leg ice cube protector is in place; And
The top view of the spud leg of the offshore boring island that Fig. 6 is, wherein the second embodiment of spud leg ice cube protector is in place.
The specific embodiment
Now then one or more preferred structures of the present invention are arranged be elaborated, should be appreciated that in other structural configuration and also can embody creationary feature 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 on 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 drawn to another exploration scene and be drawn to or drag away from the shore base of serving with other seashores for safeguarding from a scene of exploring.
When self-elevating drilling platform 10 was drawn to the situ of drilling well that is arranged in general shallow water, spud leg 25 was fallen via the notch in shell 20 (enclosing well) 27, engages with seabed 15 as shown in Figure 2 until be positioned at the footing 26 of the bottom of spud leg 25.In a preferred embodiment, footing 26 is connected to shoe (spud cans) 28 so that offshore boring island 10 is fixed to the seabed.In case footing 26 engages with seabed 15, the lifting drilling cramp in notch 27 is fallen spud leg 25, so shell 20 is thus lifted on the water surface.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.Generally can not begin the oil well drilling operation when there is no ice cube in the zone.
By adopting the configuration that ice cube is defensive, shell is in water as shown in Figure 3, iceproof self-elevating drilling platform 10 of the present invention is designed to defend floating ice.In Fig. 3, 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 this 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, and the position with opposing floating ice any pressure that may cause with offshore boring island 10 remains on situ of drilling well.As shown in Figure 4, thus offshore boring island 10 fallen and make 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 (ice 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 imagine 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.
In Fig. 2,3 and 4, the invention provides the first additional ice cube defence feature, wherein, blast fan 35 is arranged to via flexible pipe 36, air is blasted into shoe 28 downwards.Shoe 28 comprises that hole or diffuser stir spud leg 25 seawater on every side to discharge bubble.Thereby the seawater that has stirred is stirred and prevents from forming ice cube on spud leg, and forms the stream naturally away from spud leg.By means of the gas stirring system, when beginning to become a kind of hidden danger when freezing, offshore boring island 10 may be remained on configuration as shown in Figure 2, rather than begin immediately to carry out offshore boring island 10 is become defence as shown in Figure 3, the step of the configuration of shell water from as shown in Figure 2 transformation of configuration.If weather forecast hint will be storm and billow (in these situations as shown in Figure 2 the configuration that is positioned on horizontal plane be preferred) after the potential ice-formation condition of a period of time, this will be useful so.
Except gas stirring, spud leg ice cube protector 32 is attached between the column 31 of spud leg, to be provided for the of the present invention second additional ice cube defence feature.In Fig. 5, thereby spud leg ice cube protector 32 is bent to provide a round-shaped spud leg any ice cube on every side that makes to turn to.In Fig. 6, spud leg ice cube protector 33 is relatively flat.As shown in Fig. 2,3 and 4, spud leg ice cube protector 32 or 33 preferably be positioned on spud leg with on water line 12, under and pass water line 12 and extend, but there is no need to cover the whole vertical extension of each spud leg 25.
Ice cube has the larger compressive strength that is in 4 to 12MPa scopes, but the bending resistance folding endurance is less, and typical flexural strength is in 0.3 to 0.5MPa scope.The power of the floating ice 51 that moves along sea 12 as shown in the figure, 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 etc. 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 turns to floating around the side of shell 20 ice cube.If ice cube is thicker, ice cube jet deflector 45 be arranged to than the more precipitous angle in ice cube bending surface 41 to downward-extension, this acts on bending power on floating ice with increase.At ice cube jet deflector 45 places, an ice cube jet deflector is positioned to evener from the bottom of shell 20 to downward-extension.In optional structural configuration, turn of bilge (turn of bilge) is the evener in the bottom at the place, bottom of ice cube jet deflector 45.
May be applied to power on offshore boring island 10 in order to resist extraly floating ice, the footing 26 of spud leg can be arranged to be connected with the shoe 28 that is set in the seabed, thereby make when floating ice collision ice cube bends surperficial 41, in fact spud leg 25 will hold 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 a side of the extreme close floating ice that may lift offshore boring island 10 and by offshore boring island being overthrown as fulcrum or pivot with the footing 26 of the opposition side of offshore boring island 10.Shoe in the seabed becomes known for other application, 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 shell that is transformed into as shown in Figure 3 from as shown in Figure 2 traditional open water drilling well configuration may need fairly large planning and adjustment at water medium floe defence configuration.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 ice operation as traditional self-elevating drilling platform in the sea in nothing, but also be designed to then again obtain traditional attitude or configuration when the wave active force becomes hidden danger in ice cube is defendd to be placed to water under the position.The shape of shell 20 (and intensity of shell 20) provides the possibility of ice cube bending and fracture.
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 is in as shown in Figure 3 lower time of ice cube defense attitude configuration (configuration that sometimes is in water also referred to as shell), floating ice unlikely touches spud leg.In addition, offshore boring island 10 need not 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 easily freeze, therefore make this industry really save cost.
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 skilled 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 ice cube is directed under described shell;
At least three truss framed legs, within described spud leg is positioned at the periphery of bottom of described floating shell, wherein, can be with described offshore boring island towing through shallow water area thereby described spud leg is arranged to promote aweigh, 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, thereby in order to being promoted, described spud leg make aweigh the described iceproof self-elevating drilling platform can be floating by the buoyancy of described shell, 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;
Spud leg ice cube protector, described spud leg ice cube protector are arranged so that described truss framed leg avoids the impact of ice cube; And
The gas stirring system, shown in the gas stirring system stir near described spud leg seawater, and slow down the problem of freezing near described spud leg.
2. iceproof self-elevating drilling platform according to claim 1, is characterized in that, described truss framed leg comprises column and the transverse member that is connected described column, and described ice cube protector is positioned between described column to protect described transverse member.
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, is characterized in that, it is reinforced surface that described ice cube bends the surface.
8. one kind is used for the method for drilling in the waters that easily freezes, and 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, 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 ice cube is directed under described shell;
At least three truss framed legs are provided, within described spud leg is positioned at the periphery of bottom of described shell, wherein, each spud leg comprises a plurality of columns of orientation vertically that connect by transverse member, and the ice cube protector is arranged between described column so that described transverse member is avoided the impact of ice cube;
Fall each spud leg, so that the footing on bottom described spud leg engages with 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 ice cube the flow through position of described offshore boring island the bending power that ice cube is broken; And
Stir near the seawater of described spud leg to slow down the problem of freezing near described spud leg.
9. method according to claim 8, also comprise described spud leg is anchored to the seabed with the step of the power of further opposing floating ice.
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, and described shell is dropped to step in water more specifically comprises 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 for drilling in the waters that easily freezes, 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/US2011/057324 WO2012054855A1 (en) | 2010-10-21 | 2011-10-21 | Ice worthy jack-up drilling unit with gas agitation and leg ice shields |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103180514A true CN103180514A (en) | 2013-06-26 |
| CN103180514B CN103180514B (en) | 2016-05-18 |
Family
ID=48222547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180050470.3A Expired - Fee Related CN103180514B (en) | 2010-10-21 | 2011-10-21 | With the iceproof jack up drilling unit of gas stirring and spud leg ice cube protector |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2630305B1 (en) |
| KR (1) | KR20130120462A (en) |
| CN (1) | CN103180514B (en) |
| CA (1) | CA2812596C (en) |
| RU (1) | RU2573372C2 (en) |
| SG (1) | SG189102A1 (en) |
| WO (1) | WO2012054855A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485318A (en) * | 2013-09-23 | 2014-01-01 | 浙江海洋学院 | Pile leg deicing device |
| CN104975592A (en) * | 2015-06-30 | 2015-10-14 | 武汉船用机械有限责任公司 | Truss type pile leg |
| CN113216122A (en) * | 2021-06-16 | 2021-08-06 | 江苏科技大学 | Drilling platform suitable for polar region |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202200015771A1 (en) * | 2022-07-26 | 2024-01-26 | Natale Viscomi | System for maneuvering ships in icy waters |
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| US4578000A (en) * | 1982-06-15 | 1986-03-25 | Oy Wartsila Ab | Method of protection |
| 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 |
| CN201172814Y (en) * | 2007-12-04 | 2008-12-31 | 中国石油集团海洋工程有限公司 | Shallow sea self-lifting production testing work platform |
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| US20080240863A1 (en) * | 2007-03-30 | 2008-10-02 | Remdial (Cyprus) Pcl | Elevating support vessel and methods thereof |
-
2011
- 2011-10-21 EP EP11782697.4A patent/EP2630305B1/en not_active Not-in-force
- 2011-10-21 CA CA2812596A patent/CA2812596C/en not_active Expired - Fee Related
- 2011-10-21 WO PCT/US2011/057324 patent/WO2012054855A1/en active Application Filing
- 2011-10-21 SG SG2013022348A patent/SG189102A1/en unknown
- 2011-10-21 KR KR1020137010000A patent/KR20130120462A/en not_active Application Discontinuation
- 2011-10-21 RU RU2013123024/13A patent/RU2573372C2/en not_active IP Right Cessation
- 2011-10-21 CN CN201180050470.3A patent/CN103180514B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7705518A (en) * | 1977-05-18 | 1978-11-21 | Rijn Schelde Verolme Maschf En | Deicing equipment for vulnerable components on offshore installations - comprises automatically inflatable and deflatable flexible bodies secured detachably |
| US4578000A (en) * | 1982-06-15 | 1986-03-25 | Oy Wartsila Ab | Method of protection |
| 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 |
| CN201172814Y (en) * | 2007-12-04 | 2008-12-31 | 中国石油集团海洋工程有限公司 | Shallow sea self-lifting production testing work platform |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485318A (en) * | 2013-09-23 | 2014-01-01 | 浙江海洋学院 | Pile leg deicing device |
| CN103485318B (en) * | 2013-09-23 | 2015-10-21 | 浙江海洋学院 | A kind of spud leg deicer |
| CN104975592A (en) * | 2015-06-30 | 2015-10-14 | 武汉船用机械有限责任公司 | Truss type pile leg |
| CN113216122A (en) * | 2021-06-16 | 2021-08-06 | 江苏科技大学 | Drilling platform suitable for polar region |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2812596C (en) | 2015-06-30 |
| EP2630305A1 (en) | 2013-08-28 |
| CN103180514B (en) | 2016-05-18 |
| RU2573372C2 (en) | 2016-01-20 |
| RU2013123024A (en) | 2014-11-27 |
| EP2630305B1 (en) | 2015-07-22 |
| CA2812596A1 (en) | 2012-04-26 |
| KR20130120462A (en) | 2013-11-04 |
| WO2012054855A1 (en) | 2012-04-26 |
| SG189102A1 (en) | 2013-05-31 |
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