CN103168136A - Ice worthy jack-up drilling unit with conical piled monopod - Google Patents
Ice worthy jack-up drilling unit with conical piled monopod Download PDFInfo
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- CN103168136A CN103168136A CN2011800504737A CN201180050473A CN103168136A CN 103168136 A CN103168136 A CN 103168136A CN 2011800504737 A CN2011800504737 A CN 2011800504737A CN 201180050473 A CN201180050473 A CN 201180050473A CN 103168136 A CN103168136 A CN 103168136A
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- 238000005553 drilling Methods 0.000 title claims description 61
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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
- 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
-
- 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
-
- 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
- E02B17/027—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 steel structures
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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
- E21B7/008—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
-
- 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
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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
- E02B2017/0056—Platforms with supporting legs
- E02B2017/006—Platforms with supporting legs with lattice style supporting legs
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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
- E02B2017/0056—Platforms with supporting legs
- E02B2017/0069—Gravity structures
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Environmental & Geological Engineering (AREA)
- Earth Drilling (AREA)
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Abstract
The invention relates to an ice worthy jack up rig with a conical piled monopod working together to drill wells and produce hydrocarbons in 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. Both the hull and conical piled monopod are shaped with ice bending surfaces to bend and break up ice that comes into contact.
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 each 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 must wishing that no profits came in is not expensive so.Yet in the arctic, rarely what is not expensive.
Now, in the shallow waters 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 start and end time in prediction probing season is a game of chance, 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 (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 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 is lifted on the water surface, therefore thereby the wave active force of seawater only affects the spud leg with quite little cross section, allows the wave active force in the situation that do not impose on the remarkable momentum of self-elevating drilling platform and advanced from the side.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 complete 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 to have begun 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.These structures based on gravity are very large-scale and very expensive, and are constructed to and can stand ice load the whole year.Any chance that reduces safely the development cost of the arctic all can be saved the very money of enormous quantity.
Summary of the invention
The present invention more specifically relates to a kind of system, described system comprises for drill the iceproof self-elevating drilling platform of hydrocarbon under potential icing environment at greater coasting area, described offshore boring island comprises: floating shell, described floating shell has the deck of the opposed flattened of the section of being located thereon.Described floating shell also comprise 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.The one ice cube section of being folded to is configured to extend around the periphery of the bottom of described shell, with round described shell guiding ice cube rather than it is directed under described shell.Within at least three spud legs are positioned in 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 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.Described system also comprises the taper piling prop stand with a main body, described taper piling prop stand has the substrate that is positioned at the bottom and the deckhead that is positioned at the top, and wherein described substrate is attached to pile body in being pressed into the seabed when described taper piling prop stand is installed for use.The main body of described taper piling prop stand comprises the ice cube composition surface of inclination, described ice cube composition surface extends to narrower upper area around described main body and from wider lower area, and wherein said lower area is positioned under the sea and described upper area is positioned on the sea.Described offshore boring island is arranged to the operation together with described taper piling prop stand by its shell being risen on the sea, and drill downwards with the prop stand of driving piles via described taper above extending to described taper piling prop stand, thereby and will himself drop in water to adopt ice cube defence attitude to make that ice cube can contact with the ice cube bending shape of described offshore boring island when thin ice occur, and move apart described offshore boring island when the thick ice of appearance.
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 provides the prop stand of the taper piling with main body, described taper piling prop stand has the ice cube composition surface of the substrate, the deckhead that is positioned at the top and the inclination that are positioned at the bottom, described ice cube composition surface extends to narrower upper area around described main body and from wider lower area, and wherein said lower area is positioned under the sea and described upper area is positioned on the sea.Pile body is pressed into the seabed and described pile body is attached to described taper piling prop stand so that described taper piling prop stand is fixed to the seabed.Offshore boring island is provided, described offshore boring island has floating shell, described floating shell has the deck of the opposed flattened of the section of being located thereon, and have 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.The one ice cube section of being folded to is arranged to extend around the periphery of the bottom of described shell, with round described shell guiding ice cube rather than it is directed under described shell.Within at least three spud legs are positioned in the periphery of bottom of described floating shell.Fall each spud leg, engage with the seabed and do not work as 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 so that be positioned at footing on the bottom of described spud leg.Also 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 described ice cube flows through described offshore boring island the bending power that ice cube is broken.At the sidepiece on described deck from offshore boring island via the downward drilling well of described taper piling prop stand.
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 elevation of the present invention, and wherein offshore boring island swims in water, and can be drawn to situ of drilling well;
Fig. 2 is elevation of the present invention, and wherein offshore boring island rises on the water surface;
Fig. 3 is the elevation for the defence configuration of drilling 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;
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 shows the elevation of offshore boring island, and this offshore boring island is being shifted to taper piling prop stand to drill for the prop stand of driving piles via taper downwards;
Fig. 6 shows the elevation of offshore boring island, and this offshore boring island is arranged on taper piling prop stand to drill downwards via taper piling prop stand;
Fig. 7 shows the elevation of offshore boring island, and wherein, this offshore boring island is arranged near taper piling prop stand in its ice cube defence configuration; And
Fig. 8 is top view, and it shows the offshore boring island that is positioned to via the downward probing of taper piling prop stand.
The specific embodiment
Now then one or more structural configuration of the present invention 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 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 to be installed to drilling well suspension 24 and with the derrick 30 of other traditional equipments and system, this is conducive to the probing of well.In configuration as shown in Figure 1, self-elevating drilling platform 10 can be drawn to another situ of drilling well and be drawn to another shore base to be used for maintenance and other seashore services from a shore base from a situ of drilling well.
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 until be positioned at the footing 26 of the bottom of spud leg 25 and engage with seabed 15 as shown in Figure 2.In a preferred embodiment, footing 26 is connected to shoe 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 pushes away spud leg 25 downwards, 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.
When beginning to freeze on sea 12, for traditional self-elevating drilling platform; the risk that floating ice contacted and damaged spud leg 25 with spud leg 25 or fully self-elevating drilling platform 10 pushed away situ of drilling well becomes a major hidden danger, and this offshore boring island is typically until the water surface just moves apart situ of drilling well when finishing season without ice.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.Thereby being fallen, offshore boring island 10 make intilted ice cube bending surperficial 41 stride across as shown in Figure 4 sea 12 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(ice deflector) 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 fracture 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 fractures 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. 5, usually by the taper piling prop stand of Reference numeral 60 expression by pre-installation to the seabed.This taper piling prop stand 60 is the structures that can be used in the offshore locations that is easy to freeze, and with traditional comparing based on gravity structure (GBS), the cost of this structure is lower.Taper piling prop stand 60 comprises main body 65, substrate 67 and deckhead 70.This substrate 67 preferably has the flange shape, and this flange shape is with the isolated hole of periphery or perforation around taper piling prop stand 60.Substrate 67 is arranged to be placed on seabed 15.When taper piling prop stand 60 was arranged on the seabed, the weight of taper piling prop stand 60 was preferably supported by a plurality of pile bodies 68, and this pile body 68 is pressed into dearly in seabed 15 and then is attached to taper piling prop stand 60.Typically, pile body 68 is pressed in sea bed about 35 meters to about 75 meters and deeply for good and all is fixed on offshore locations with prop stand 60 that taper is driven piles.But pile body 68 typically is as the pipe of the solid hollow that works spike or pipe fitting similar structures and for the permanent platform that is used for offshore hydrocarbon probing and production operation, and very effective layout on structure is provided.This pile body has the relatively large diameter between 1 meter to 3 meters and has the thickness of about 2cm to 10cm.A certain benefits of the present invention is: in the situation that the gravity of taper piling prop stand 60 is by pile body 68 supportings, there is no need to carry out sea bed preparation before installing or carry out seldom sea bed preparation, if there is any sea bed preparation, the seabed that needs in principle to form a level is arranged on the seabed of this level with the prop stand 60 of when pile body 68 is installed, taper being driven piles.The sea bed that comprises soft muddy material is unlikely hollowed out and can not be replaced it with hard material.
Be minimized or do not exist in the situation that taper piling prop stand 60 by pile body 68 supportings, is used for the seabed preparation of installation taper piling prop stand 60.In case pile body 68 is pressed into the seabed and is fixedly attached to substrate 67, pile body 68 to as the repellence of exerting oneself to provide: the power that (a) causes structure to be slided along the seabed; (b) cause the power of structure upset, such as the power at several meters on the substrate that acts on structure; And the power that (c) causes vertical motion up and down.For move up and down or the power of overthrowing that mobile repellence may be applied by ice cube in opposing aspect be very important.Be positioned at lifting force that pile body 68 opposings of taper piling prop stand 60 front sides may apply at upstream side by ice cube and overthrown preventing, be positioned at simultaneously the distally of taper piling prop stand 60 or pile body 68 opposings in rear side or downstream and allow rear sides deeper to roll moving downward of seabed 15.For for the annual operation of carrying out in the coastal waters ice cube environment that is easy to freeze and must resist sizable ice load, use the long pile body of this kind that effectively substrate on structure is provided.The pile body that works as nail is held in place platform and structurally the situation than GBS is more effective, in the situation that GBS, only the size by structure and gravity provide the repellence to upset.
Vertical force by prediction and the size of lateral force and the edaphic intensity that pile body 68 is pressed into are determined length and the quantity of pile body 68.Preferably, be arranged on the pile body strategy around the surrounding of substrate 67 so that with construct validity opposing sliding force and the tilting force of maximum.This substrate comprises at least 8 pile bodies that have each other certain intervals around periphery, preferably at least 16 pile bodies, 64 pile bodies at the most, to maximize like this construct validity and form pile body bunch, a large amount of pile bodies works to resist lateral force and supporting taper piling prop stand 60 together in this pile body bunch.According to the strength characteristics of the load of predicting and soil, it is dark that pile body 68 typically extends to 35 meters to 75 meters, seabed.Taper piling prop stand 60 is depicted as octahedral structure, but class circle or circular in configuration also can adopt.Preferably, for the ease of making, preferably structure has 6,8 or 12 limits even, and preferably each limit size equates and the symmetrical configuration of taper piling prop stand 60.
The main body 65 of taper piling prop stand 60 comprises that 12 belows extend to the ice cube composition surface 72 of the inclination of 12 tops, sea from the sea, thus make marine ice cube particularly floating ice engage on the ice cube composition surface 72 of inclination with main body 65.Ice cube composition surface 72 extends around the periphery of taper piling prop stand 60, thereby makes the ice cube from all directions to contact on ice cube composition surface 72 with main body 65.The slope of ice cube composition surface 72 makes any a slice ice cube to rise on the slope and bend to snap point, and this ice cube composition surface 72 angle between 40 ° to 60 ° typically, more preferably from the horizontal by 55 ° of angles roughly.The berg that fractures (being called rubble ice) will move round main body 65 under ocean current and wind action.Taper piling prop stand 60 comprises a shape above ice cube composition surface 72, this shape makes the ice cube that pushes away on the way along ice cube composition surface 72 leave.Deck 70 is positioned at the top of taper piling prop stand 60, and this deck 70 can be equipped be used to the drilling template of drilling a lot of wells (drilling template).
Taper piling prop stand 60 is sizable structures: in this structure, typically the size on deck 70 is greater than the span of 75 meters.Taper piling prop stand huge and solid in, an advantage that is better than based on gravity structure is before any Water Ballast, gentlier or more specifically density is less for the weight cardinal principle.For taper piling prop stand 60, the solid ballast material is generally unwanted.(GBS) typically has from 0.21 ton/m based on gravity structure
3To 0.25 ton/m
3Density, and taper piling prop stand 60 can be configured to 0.20 ton/m
3With down to about 0.18 ton/m
3Frequently, GBS needs the solid ballast thing to increase its weight so that the repellence to sliding and overturning to be provided.By using 68 bunches of pile body 68 or pile bodies, taper piling prop stand 60 can design to such an extent that have lighter weight.Except due to for the preparation of the seabed that is used for large-scale GBS system be used for often joining the low installation cost that the release of on-the-spot setting up cost of the high density ballast materials of GBS causes, the lighter density of taper piling prop stand 60 also can show as lower manufacturing and cost of transportation.
Although taper piling prop stand 60 may be equipped with derrick and system for drilling well, if but can drill or have cost savings by self-elevating drilling platform---because taper piling prop stand size point a little, so certainly only just have cost savings aspect size, more need not mention the cost savings of all drilling well associated equipments and system.The drilling well of carrying out via the iceproof offshore boring island of taper piling prop stand utilization such as platform 10 provides extra cost savings, and reason is: when icing sign is just arranged, offshore boring island need not be dragged away from.Annual can utilize the following iceproof offshore boring island 10 more wells of probing, this iceproof offshore boring island 10 can be held in place the long period until during other offshore boring island autumns of withdrawing already.
In the situation that the taper prop stand 60 of driving piles is fixed to seabed 15, offshore boring island 10 moves into as shown in Figure 5, and installs to drill via taper piling prop stand 60 as shown in Figure 6 downwards.The spud leg 25 of iceproof offshore boring island 10 must be configured to more solid than traditional spud leg and can stand limited ice threaten.Yet in the situation that ice threatens from existing more significantly, iceproof offshore boring island 10 can select to stay in the original place, suspending a well operation and employing ice cube defence configuration as shown in Figure 7.When ice cube reduces, can restart drilling well, when ice cube becomes too thick, offshore boring island 10 can be moved apart the scene fully until next the probing begins season.Shape (intensity that also has shell 20) by shell 20 provides the ability that ice cube is crooked and fracture, and has extended the probing time window, and this has reduced the cost of drilling being easy to icing position basically.Although preferably offshore boring island 10 is set near one of them of a plurality of of taper piling prop stand as shown in Figure 8, this offshore boring island 10 can be as shown in 20A from by any direction near taper piling prop stand.
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 make when offshore boring island 10 is in its as shown in Figure 3 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 needn't be processed each floating ice and threaten, and this has improved the profit of oil and gas company significantly.Drilling short one month of season if offshore boring island 10 can extend, will be 50% raising so in some zones that are easy to freeze, and therefore the benefit of out and out saving cost is provided to this industry.
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 system described here and processing 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 here 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 (15)
1. one kind is used for drilling and produce the system of hydrocarbon at greater coasting area under potential ice-formation condition, and described system comprises:
Offshore boring island, 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 spud 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; And certainly rise 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; With
Taper piling prop stand, described taper piling prop stand has a main body, described taper piling prop stand has the ice cube composition surface of the substrate, the deckhead that is positioned at the top and the inclination that are positioned at the bottom, wherein being installed, the described substrate when using of described taper piling prop stand is attached to pile body in being pressed into the seabed, described ice cube composition surface extends to narrower upper area around described main body and from wider lower area, and wherein said lower area is positioned under the sea and described upper area is positioned on the sea;
Wherein, described offshore boring island is arranged to its shell is risen on the sea and via described taper piling prop stand and is drilled, thereby and will himself drop in water to adopt ice cube defence attitude to make that ice cube contacts with the ice cube bending shape of described offshore boring island when having thin ice, and move apart when having thick ice.
2. system according to claim 1 and 2, 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. system according to claim 1, is characterized in that, the described ice cube bending surface of described offshore boring island is from the less neck alignment of size and be tilted out to larger-size shoulder.
4. system described according to any one in aforementioned claim, is characterized in that, the surperficial in the vertical direction of described ice cube bending of described offshore boring island extends at least 8 to 10 meters or more.
5. system according to claim 4, is characterized in that, in the scope that the described ice cube bending surface of described offshore boring island and vertical direction angulation are in 30 ° to 60 °.
6. system described according to any one in aforementioned claim, is characterized in that, the described main body of described taper piling prop stand has the width of at least 60 meters, and described taper piling prop stand structure has less than about 0.20 ton/m
3Density.
7. system described according to any one in aforementioned claim, is characterized in that, described pile body is positioned at 35 meters or darker of described substrate belows.
8. system described according to any one in aforementioned claim, is characterized in that, described pile body is positioned at 50 meters or darker of described substrate belows.
9. method that is used in the waters drilling well that is easy to freeze, described method comprises:
One taper piling prop stand is provided, described taper piling prop stand has a main body, described taper piling prop stand has the ice cube composition surface of the substrate, the deckhead that is positioned at the top and the inclination that are positioned at the bottom, described ice cube composition surface extends to narrower upper area around described main body and from wider lower area, and wherein said lower area is positioned under the sea and described upper area is positioned on the sea;
Pile body is pressed into the seabed and described pile body is attached to described taper piling prop stand so that described taper piling prop stand is fixed to the seabed;
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;
Provide at least three spud legs, within described spud leg is positioned at the periphery of bottom of described floating shell;
Fall each spud leg, so that the footing that is positioned on the bottom of described spud leg engages with the seabed, and all rise to described shell on the water surface 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 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 described ice cube flows through described offshore boring island the bending power that ice cube is broken; And
At the sidepiece on described deck and via the downward drilling well of described taper piling prop stand.
10. method according to claim 9, is characterized in that, the step that described pile body is pressed into the seabed also comprise the pile body with at least 1 meter of diameter be pressed in the seabed at least 35 meters dark.
11. according to claim 9 or 10 described methods, it is characterized in that, described ice cube bending surface extends to the neck line from shoulder, more specifically comprises described shell is dropped to and makes described neck line be positioned under the sea at least 4 meters and described shoulder in water to be positioned on the sea at least 7 meters thereby described shell is dropped to step in water.
12. the described method of any one according to claim 9 to 11 also comprises the step that when the harmfulness of floating ice reduces, described shell is risen on the water surface.
13. the described method of any one according to claim 9 to 12 is characterized in that, the step that described pile body is pressed into the seabed also comprise the pile body with at least 1.5 meters of diameters be pressed in the seabed at least 50 meters dark.
14. the described method of any one according to claim 9 to 13 is characterized in that, the step that described pile body is pressed into the seabed also comprise the pile body with at least 2 meters of diameters be pressed in the seabed at least 60 meters dark.
15. a method that is used in the waters drilling well that is easy to freeze, described method comprise the described offshore boring island of any one and taper piling prop stand in use according to claim 1 to 7.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40549710P | 2010-10-21 | 2010-10-21 | |
| US61/405,497 | 2010-10-21 | ||
| US41495010P | 2010-11-18 | 2010-11-18 | |
| US61/414,950 | 2010-11-18 | ||
| US13/277,791 | 2011-10-20 | ||
| US13/277,755 | 2011-10-20 | ||
| US13/277,755 US8821071B2 (en) | 2010-11-18 | 2011-10-20 | Conical piled monopod |
| US13/277,791 US20120128426A1 (en) | 2010-10-21 | 2011-10-20 | Ice worthy jack-up drilling unit |
| PCT/US2011/057353 WO2012054875A1 (en) | 2010-10-21 | 2011-10-21 | Ice worthy jack-up drilling unit with conical piled monopod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103168136A true CN103168136A (en) | 2013-06-19 |
| CN103168136B CN103168136B (en) | 2015-11-25 |
Family
ID=48222548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180050473.7A Expired - Fee Related CN103168136B (en) | 2010-10-21 | 2011-10-21 | With the iceproof jack-up rigs unit of taper piling prop stand |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2630304A1 (en) |
| KR (1) | KR20130120464A (en) |
| CN (1) | CN103168136B (en) |
| CA (1) | CA2812597C (en) |
| RU (1) | RU2573301C2 (en) |
| SG (1) | SG189117A1 (en) |
| WO (1) | WO2012054875A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2620816C1 (en) * | 2016-03-29 | 2017-05-30 | Федеральное государственное автономное образовательное учреждение высшего образования "Дальневосточный федеральный университет" (ДВФУ) | Self-lifting drilling ice-resistant plant |
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| US3972199A (en) * | 1972-06-26 | 1976-08-03 | Chevron Research Company | Low adhesional arctic offshore platform |
| GB2017794A (en) * | 1978-03-29 | 1979-10-10 | Chevron Res | Offshore Structure |
| GB2079826A (en) * | 1980-07-09 | 1982-01-27 | Coyne & Bellier | Underwater support structures for platform-carrying tower or towers |
| US4602895A (en) * | 1982-06-15 | 1986-07-29 | Oy Wartsila Ab | Drilling platform |
| 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 |
| CN2911009Y (en) * | 2006-01-23 | 2007-06-13 | 中国海洋石油总公司 | One-leg three-pile simple platform suitable for developing medium-small oil fields in sea |
| WO2007126477A2 (en) * | 2006-03-30 | 2007-11-08 | Exxonmobil Upstream Research Company | Mobile, year-round arctic drilling system |
| CN200985504Y (en) * | 2006-12-18 | 2007-12-05 | 中国石油天然气集团公司 | Anti-ice type conduit pipe support sea oil production platform |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2061147C1 (en) * | 1993-10-27 | 1996-05-27 | Центральное конструкторское бюро морской техники "Рубин" | Drilling platform |
| RU2130526C1 (en) * | 1995-04-03 | 1999-05-20 | Открытое акционерное общество "Научно-исследовательский и проектно- конструкторский институт по проблемам освоения нефтяных и газовых ресурсов континентального шельфа" | Ice-resistant sea platform and method for its erection |
-
2011
- 2011-10-21 KR KR1020137010005A patent/KR20130120464A/en not_active Application Discontinuation
- 2011-10-21 RU RU2013123040/13A patent/RU2573301C2/en not_active IP Right Cessation
- 2011-10-21 CN CN201180050473.7A patent/CN103168136B/en not_active Expired - Fee Related
- 2011-10-21 WO PCT/US2011/057353 patent/WO2012054875A1/en active Application Filing
- 2011-10-21 CA CA2812597A patent/CA2812597C/en not_active Expired - Fee Related
- 2011-10-21 SG SG2013022603A patent/SG189117A1/en unknown
- 2011-10-21 EP EP11779518.7A patent/EP2630304A1/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3972199A (en) * | 1972-06-26 | 1976-08-03 | Chevron Research Company | Low adhesional arctic offshore platform |
| GB2017794A (en) * | 1978-03-29 | 1979-10-10 | Chevron Res | Offshore Structure |
| GB2079826A (en) * | 1980-07-09 | 1982-01-27 | Coyne & Bellier | Underwater support structures for platform-carrying tower or towers |
| US4602895A (en) * | 1982-06-15 | 1986-07-29 | Oy Wartsila Ab | Drilling platform |
| 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 |
| CN2911009Y (en) * | 2006-01-23 | 2007-06-13 | 中国海洋石油总公司 | One-leg three-pile simple platform suitable for developing medium-small oil fields in sea |
| WO2007126477A2 (en) * | 2006-03-30 | 2007-11-08 | Exxonmobil Upstream Research Company | Mobile, year-round arctic drilling system |
| CN200985504Y (en) * | 2006-12-18 | 2007-12-05 | 中国石油天然气集团公司 | Anti-ice type conduit pipe support sea oil production platform |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20130120464A (en) | 2013-11-04 |
| CN103168136B (en) | 2015-11-25 |
| SG189117A1 (en) | 2013-05-31 |
| RU2573301C2 (en) | 2016-01-20 |
| CA2812597C (en) | 2015-12-29 |
| RU2013123040A (en) | 2014-11-27 |
| CA2812597A1 (en) | 2012-04-26 |
| EP2630304A1 (en) | 2013-08-28 |
| WO2012054875A1 (en) | 2012-04-26 |
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