CN101978133A - Ship for drilling and production in icy waters - Google Patents
Ship for drilling and production in icy waters Download PDFInfo
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- CN101978133A CN101978133A CN2009801048876A CN200980104887A CN101978133A CN 101978133 A CN101978133 A CN 101978133A CN 2009801048876 A CN2009801048876 A CN 2009801048876A CN 200980104887 A CN200980104887 A CN 200980104887A CN 101978133 A CN101978133 A CN 101978133A
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- rotating turret
- buoy
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- drilling riser
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
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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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- 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
- B63B2035/448—Floating hydrocarbon production vessels, e.g. Floating Production Storage and Offloading vessels [FPSO]
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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
- B63B35/12—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 having ice-cutters
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Earth Drilling (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
Abstract
Ship adapted for drilling of oil and/or gas wells, adapted for drilling through a drill riser string that extends from a well in the seabed to a turret arranged in the ship. The drill riser string is adapted to be separated from connection to the ship in a position beneath the ship's base line, so that the ship can leave the drill riser string.
Description
Technical field
The present invention relates to a kind of ship, it can be used for drilling for oil and/or the natural gas well, and exploits.Especially, the present invention relates to a kind of can be at the ship of waters, Arctic operation.Further, the present invention relates to a kind of system and Several Methods, this system and these methods are respectively as described in the independent claims separately.
Background technology
Can be that everybody is known at ship off-shore boring's oil well, that have rotating turret, for example U.S. Pat 5,359,957 structures that disclosed.Rotating turret makes ship become possibility with respect to the location of oil well any direction, and this is because ship can be round the central axis rotation of rotating turret.The rotation of above-mentioned ship often is needs, can be in order to reduce the load on mooring cable or the propeller.For this purpose, ship can be located in some way and be made it bear less power from current as much as possible.
In Arctic, marine ice will be an additional challenge to ship.Marine ice may be ice structure (iceberg), and it can force ship to leave oil well.This ship also may be piled up by floating ice.Floating ice can apply huge power to big ship, therefore must address these problems with good method to avoid producing excessive power on mooring cable or propeller.
Summary of the invention
First embodiment of the present invention provides a kind of ship, and it can be used for drilling for oil and/or the natural gas well.This ship is characterised in that it can drill by a drilling riser, on this drilling riser extends upwardly to a rotating turret on the ship from the oil well in seabed.This drilling riser can be below the bottom of the bottom line of ship or ship breaks away from ship and is connected, so that ship can leave this drilling riser.This way can make ship leave oil well apace becomes possibility.This drilling riser need not be pulled out and take in the ship, but can still be kept upright.
This rotating turret preferably includes a bottom, and this bottom can break away from by this way with ship: this bottom sinks down into an equilbrium position from gap seawater, and this bottom is around at least a portion of this drilling riser in the equilbrium position.The bottom of this rotating turret has buoyancy, and therefore, in its equilbrium position, this bottom can be lifted to the small part mooring cable.
This bottom is preferably mounted on the mooring cable, and has buoyancy as mentioned above, so that it keeps being suspended on the seabed from sinking down into an equilbrium position after ship breaks away from and making to the small part mooring cable.In this equilbrium position, this bottom will advantageously provide the support of side simultaneously for this drilling riser.This situation is possible, because the weight of mooring cable will make the bottom of this rotating turret be positioned at the top of oil well always.
Another embodiment of the invention provides a kind of ship, it can probing and/or the recover petroleum and/or the natural gas well, and this ship can connect with at least one oil recovery riser pipe that is connected with rotating turret on the ship, perhaps be connected with a drilling riser, this drilling riser passes a rotating turret and is connected with ship.In this embodiment of the present invention, the bottom of this rotating turret extends to the following certain distance of bottom line of ship.This distance preferably is at least 3 meters.
Another embodiment of the invention provides a kind of ship, be used for probing and/or recover petroleum and/or the natural gas well, and this ship can connect with at least one oil recovery riser pipe that is connected with rotating turret on the ship, perhaps be connected with a drilling riser, this drilling riser passes a rotating turret and is connected with ship.Wherein, this ship comprises an ice barrier structure, and this ice barrier structure extends downwards from hull bottom, and partly around this rotating turret.
An embodiment more of the present invention provides a kind of ship, be used for probing and/or recover petroleum and/or the natural gas well, and this ship can connect with at least one oil recovery riser pipe that is connected with rotating turret on the ship, perhaps be connected with a drilling riser, this drilling riser passes a rotating turret and is connected with ship.The favourable of this ship is characterised in that:
On the bow and have two long side surfaces between the stern, on the length direction of two long side surfaces, at least 50% part is provided with an ice band, this ice band has an angle α between shell and horizontal plane, the size of this angle α 45 spend spend to 80 between; And
This rotating turret has a central axis, and this central axis is positioned at the position of vertical distance between the head and the tail of 0.15 to 0.45 times of this ship before half place of Lpp (head and the tail between vertical distance) of ship.
The design like this of ship can make ship rotate, when ship has under the situation of angle in the drift direction of being wrapped up by floating ice on the water surface and icing and the long axis of ship.This and the specific embodiment as in description very approaching.Feature favourable for this ship is that also if this gear has a parallel center-aisle, the central axis of this rotating turret can be positioned at before the parallel center-aisle.
In arbitrary embodiment of the invention described above, the vertical length between the bow tail (Lpp) preferably surpasses 200 meters, and beam is between 40 to 55 meters, and the draft of this ship is at least 10 meters.
Another embodiment of the invention provides a kind of connected system, it is used for removably connecting one first element as being arranged at rotating turret and one second element such as the buoy on the ship, and this buoy can be used for accommodating mooring cable and at least one riser pipe.When buoy will be connected with rotating turret, this system can remove the water of buoy top to reduce the hydraulic pressure of buoy top.So, after the water of buoy top was removed, this buoy was pushed to the rotating turret of top by fluid pressure on every side.
One of them preferably includes first element and second element one and protrudes guiding structural, and among both another comprises a groove, and the shape of this groove and this protrusion guiding structural are complementary to accommodate this protrusion guiding structural realization interconnecting between the two.One of them preferably can comprise a locking device first element and second element, and this locking device can be with first element and the second element mechanical locking.Such designed system is fit to handle the bigger lateral force that ship produces in the tie-out among the present invention.This protrusion guiding structural and this groove can absorb the lateral force between the two, and can protect locking device to make it not be subjected to the influence of lateral force.When buoy and rotating turret disengaging, this locking device is at first opened and is made it not influenced by bigger lateral force.Then, water is transported to the space of buoy top, so that buoy will sink and then separate with rotating turret.
This protrusion guiding structural preferably is coniform, and this groove preferably has coniform with this protrusion guiding structural shape corresponding matching.When buoy under the effect of the lateral force of mooring cable when sinking, this good especially design of protruding guiding structural and groove can prevent to produce excessive power between the surface of protruding guiding structural and groove.When protruding guiding structural and will be connected with groove, this cone-shaped structure also helps to proofread and correct and aiming at buoy and rotating turret easily.
Another embodiment of the invention provides a kind of method that a buoy is separated with rotating turret on the ship, wherein, this buoy is connected with at least one riser pipe with mooring cable.This method comprises:
Locking device is opened from latched position; In latched position, locking device can be with buoy and rotating turret mechanical locking; And then
Transporting water to the top of buoy to strengthen the fluid pressure of buoy top.
So, when buoy separated with rotating turret, this locking device can not be subjected to the influence of excessive forces.
Another embodiment of the invention provides a kind of method that a buoy is connected with rotating turret on the ship, wherein, this buoy is connected with at least one riser pipe with mooring cable.This method comprises:
(p) buoy is pulled to this rotating turret; And
(q) take the water of buoy upper area away to reduce the fluid pressure of buoy upper area.
This method can comprise that preferably by the step of locking device with buoy and rotating turret mechanical locking, this step can be carried out afterwards at step (p).In principle, this step can be in step (p) before, simultaneously or carry out afterwards.Preferably, this step is carried out afterwards in step (p).
From illustrating and can learn hereinafter, a plurality of embodiments of the present invention are particularly suitable for carrying out in Arctic off-shore operation, even there is a large amount of ice to comprise that floating ice and iceberg are present under the situation on the sea.
Description of drawings
Below with reference to accompanying drawing a plurality of specific embodiment are described, wherein
Fig. 1 a to Fig. 1 c is depicted as the schematic diagram of riser pipe and ship disengaging;
Fig. 2 a and Fig. 2 b are depicted as the ship of an embodiment of the present invention, and it has a rotating turret that is used for drilling;
Fig. 3 a and Fig. 3 b are depicted as the ship of an embodiment of the present invention, and the part enlarged diagram of the ice band of this ship;
Fig. 4 a to Fig. 4 h is depicted as the method that is used to handle floating ice in an embodiment of the present invention;
Figure 5 shows that the position of a rotating turret on a ship in an embodiment of the present invention;
Figure 6 shows that a connected system, it is used for removably connecting a buoy and and is arranged at rotating turret on the ship;
Figure 7 shows that one of connected system among Fig. 6 embodiment preferably.
The specific embodiment
Fig. 1 a to Fig. 1 c is depicted as the most important parts of ship 1 among the present invention.This ship 1 is positioned at the top of oil well and/or natural gas well (not shown), and the oil well and/or the natural gas well are positioned at preventer 3 (BOP) below.Have a rotating turret 5 on the ship 1, in the process of operation, ship 1 can rotate freely round the central axis of rotating turret 5.One hard drilling riser 7 is arranged between preventer 3 and the rotating turret 5.This drilling riser 7 has a buoyancy elements 9, and this buoyancy elements 9 can be used for carrying a part of weight of this drilling riser 7.Certainly, also can adopt a plurality of buoyancy elements 9.A part of weight of this drilling riser 7 is by the carrying of the regulating wheel of ship 1, and this regulating wheel can be offset the motion of ship 1 with respect to riser pipe 7 in the vertical directions.
The bottom of this rotating turret 5 is connected with mooring cable 11, in order to ship 1 is docked in the suitable part of oil well top.
When ship 1 need leave oil well, must close oil well by preventer 3, and drilling riser 7 be pulled up at drilling riser 7 and preventer 3 after separatings.Yet, drilling riser 7 is pulled up the time that needs than long.If bigger ice structure such as iceberg near the time, ship 1 must stop drilling and sail out of avoiding and bump with this ice structure.For fear of unnecessarily, mobile ship 1 and each quality time that is wasted in when mobile on the oil well frequently, ship 1 can be designed so that it can break away from the top of drilling riser 7.Certainly, perhaps also have other reasons to require and fast ship 1 to be sailed out of.
Shown in Fig. 1 b, the bottom that a separator 13 is arranged on the bottom line of ship or ship is to the vertical distance of next section, and corresponding with drilling riser 7.This separator 13 is positioned at the tension ring below.Herein, drilling riser 7 can separate with ship 1.The top of this separator 13 is upwards drawn and is pulled to ship 1, and the top of separator 13 is separated respectively with the top of drilling riser 7 with the lower part of separator 13.Yet the bottom of this rotating turret 5 still is placed in the top of drilling riser 7, and therefore, ship 1 can not sail out of.
Fig. 1 c is depicted as the top 5a of this rotating turret 5 and the relation between the 5b of bottom.When with bottom 5b with after top 5a separates, bottom 5b will sink in seawater and be provided with around drilling riser 7.The bottom 5b of this rotating turret 5 has buoyancy, and it can carry at least a portion weight of mooring cable 11.The weight of mooring cable 11 will pull down bottom 5b to the seabed, for example 50 meters.Because the bottom 5b of this rotating turret 5 still is provided with around drilling riser 7, the bottom 5b of this rotating turret 5 can provide the support of side for drilling riser 7, and can prevent drilling riser 7 overturnings.The part of mooring cable 11 is positioned at the seabed, and its weight helps to keep bottom 5 to be positioned at suitable position, oil well top, even drilling riser 7 leans against on the bottom 5b of rotating turret 5.As Fig. 1 c, bottom 5b can sink through the buoyancy elements 9 on the drilling riser 7.Bottom 5b preferably can sink to an equilbrium position, to such an extent as to this equilbrium position is so can avoid bottom 5b and ice to bump against away from the water surface.
At this moment, the bottom 5b of ship 1 and drilling riser 7, the rotating turret 5 that links to each other with mooring cable 1 separates, and ship 1 can sail out of oil well.These operations as mentioned above, will take the considerably less time, compare with the scheme of having to whole drilling riser 7 is upwards drawn in ship 1.When the iceberg near the time, therefore the operator has the long stand-by period until making the decision that ship 1 is sailed out of.This will save valuable time and unwanted moving, and unnecessary operation is interrupted.
This separator 13 preferably is provided with in the manner described above, and still, this separator 13 also can be arranged on the position of drilling riser 7 belows.This separator 13 can be arranged on the upper end in the 5b of bottom, and when the top of rotating turret 5 5a was connected with bottom 5b, the lower part of separator 13 was located immediately at the top of the equilbrium position of this bottom 5b.
The special advantage of the bottom 5b of this rotating turret 5 is that this bottom 5b extends to the one segment distance place, below, bottom apart from the bottom line of ship or ship 1.When in the operation of the waters of many floating ices, bottom 5b can provide protection for drilling riser 7, prevents that drilling riser 7 is subjected to the influence of ice mobile below the hull of ship 1.This bottom 5b can extend downward in seawater apart from a segment distance place below the bottom line of ship, and this distance can be 3 meters.This bottom 5b can further extend downwards, and for example, this distance can be 5 meters or more.
Fig. 2 a and 2b are depicted as the design principle schematic diagram of hull of the ship 1 of an embodiment of the present invention.Among these figure, ship 1 can be used for exploitation, and it comprises some soft riser pipes 15, and these soft riser pipes 15 extend to the seabed from a rotating turret 105.Aforesaid mode, a bottom 105b of this rotating turret 105 can separate and sink down into the place, an equilbrium position in the seawater with ship 1, and at the place, equilbrium position, bottom 105b still is connected with soft riser pipe 15 with mooring cable 11.Bottom 105b preferably sinks to certain degree of depth as 50 meters, makes it can avoid contacting with the ice that floats on the surface.This rotating turret 105 can may extend to the one segment distance place, bottom line below apart from ship 1, in case stagnant ice is to the damage of ship 1 grade as the above-mentioned rotating turret that is used to drill 5.
Shown in Fig. 2 a and 2b, an ice barrier structure 17 extends from rotating turret 105.This ice barrier structure 17 forms skirt shape structures around rotating turret 105, and this ice barrier structure 17 extends downwards from hull bottom.This ice barrier structure 17 encloses ovalize, and its major axis is parallel with the long axis of ship 1.If when the pathdepth of the drift of ice was identical with ice barrier structure 17 present positions, ice barrier structure 17 helped the ice guiding is split into a lot of pieces through rotating turret 105 and with ice.So, ice barrier structure 17 helps to protect soft riser pipe 15 and mooring cable 11.At the above-mentioned ship that is used for drilling 1, preferably also design has the ice barrier structure 17 with identical function.
Further as shown in FIG., skates 19 can be arranged on fore, are used for its ice that runs into is broken into pieces, and ice can be directed into the side of ship simultaneously.Therefore, fore is characterised in that it can prevent stagnant ice seat below drift alow.Because the angle between fore and the water line, ice is at first broken when ice and fore meet, and is left ship by the long central axis guiding of ship then.
The bottom 5b of the rotating turret 5,105 in the ship 1,105b preferably can be connected to ship 1 by hydraulic locking and releasing device (not shown).The size of hydraulic locking and releasing device must be designed to bear the full ice loading on the long limit that is applied to ship, generally about 3000-10000 metric ton.Bottom 5b, the distance that 105b moves down should be abundant, so that it can be lifted to small part carrying mooring cable and drilling riser when being installed in bottom or buoy 105b (if).Should be to about 2000 to 5000 tonnes of small part mooring cable and drilling riser.
Other shapes of hull:
Below will describe at a good especially design of the hull of ship among the present invention 1.As the design of the hull that will be noted that ship 1 hereinafter ship 1 is had under the floating ice influence of angle at intensive in heaps and long axis drift direction and ship and finish rotation.
Fig. 3 a and 3b are depicted as and of the present inventionly a kind ofly can be used for drilling for oil and/or the ship 1 of the natural gas well.At the forward end of ship, be provided with a rotating turret 5,105.As previously mentioned, ship 1 here berths.Fig. 3 b is the cross-sectional view on one side of ship.Hull has a following side and divides 1a, a mid portion or an ice band 1b and a upper portion 1c.Ice band 1b is the part zone on the hull, and around one week of ship, and the floating ice in the ocean will clash into this subregion of ship 1 along water line in this subregion.Because floating ice has different size and dimensions and ship 1 has different drafts, therefore, ice band 1b in the vertical direction has certain extension.Shown in Fig. 3 b, has an angle α between this ice band 1b and the water line.The size of angle α is spent between 80 degree 45.
One long side surface with ice band of above-mentioned design will produce this effect: when floating ice when the long axis with ship is the direction bump ship 1 of an angle, floating ice will be advanced downwards by ice band 1b and floating ice be smashed.Can learn that from following description this ship 1 will have sizable advantage when the operation of Arctic, Arctic may have a large amount of ice be deposited in ship around.
Below with reference to Fig. 4 a to 4h, these figure are depicted as the situation that the ship 1 in an embodiment of the present invention is wrapped up by the ice on the sea.As mentioned above, ship berths by rotating turret 5,105.The course of work of ship its ice band 1b of relying designs preferably and is achieved, and for convenience of explanation, the drift bearing of suppose to ice is shown in arrow U, and drift bearing is perpendicular to one of long limit of ship, shown in Fig. 4 a.Ice will apply huge power to ship 1, and produce reaction force F in the berth of ship.It is also broken to ice a long limit of little by little running into ship, and this is because the effect of the angle α of inclination mentioned above.Ice is unceasingly to ship 1 drift, and a long and narrow open water will form at the opposite side of ship 1, shown in Fig. 4 b.
Because ship berths by rotating turret 5,105 and rotating turret 5,105 is positioned at the fore of ship 1, ship 1 will begin rotation when the strength of ice (U) and berth (F) accumulation forms a revolving force on ship 1.Shown in Fig. 4 c, the stern of ship 1 will change long and narrow open water over to along the direction (U) of ice drift as far as possible far.Fig. 4 d is depicted as the situation that said process is proceeded a segment distance, fore be forced to along with ice the opposite direction of drift bearing (U) rotate and ice smashed.Whole ship 1 is as lever, around rotating turret 5,105 rotations.Fig. 4 e to 4h is depicted as the remainder of ship entire work process, and last, it is parallel with the drift bearing of ice that ship 1 is adjusted to the long axis that makes it.When ice continues drift, the fore that can open ice will continue ice is smashed, and the active force that the berth of ship is subjected to will significantly reduce.
Said process has illustrated the ship 1 that is formed with the ice band among the present invention on the long limit, be how to be suitable for have ice to form or by the water surface of the possibility of ice parcel on operation.But the ship of the operation that this place is described has bigger aspect ratio usually, and this will cause mooring cable to bear bigger power.General drill ship comprises vertical long limit, and this will cause mooring cable to bear very large power, and this is that vertical long limit can not be broken when meeting with the vertical long limit of ship because of ice, needs on the contrary will ice crushing by very large compressive force.
Need to prove that at this ship 1 among the present invention is not by contacting the position of adjusting greatly on its draft or its vertical direction with ice.This point is different from existing ship, and as the Frahm polar ship, ice can apply very large power to the long limit of the inclination of Frahm polar ship and with its picking-up.
Natch, all being provided with an ice band 1b with above-mentioned angle α on two long side surfaces of ship 1 is not to be enforceable.For example, have only 50% part to be provided with an ice band with above-mentioned angle α on two long side surfaces of a ship 1, also can work.Yet this will cause unwanted and undesirable bigger masterpiece to be used in ship and mooring cable.
For the process shown in Fig. 4 a to 4h is carried out rightly, rotating turret 5,105 must be arranged on position suitable on the ship 1.Position for illustrating that this is suitable please refer to Fig. 5.Ship 1 is characterised in that vertical distance (LPP) between its head and the tail.According to the present invention, rotating turret 5,105 preferably has such feature in the position on the ship 1: the central axis of rotating turret 5,105 vertical distance between the head and the tail of ship half the place before, and apart from vertical distance between the head and the tail of ship half the place 0.15-0.45Lpp.Further, if gear has a parallel center-aisle, the central axis of rotating turret 5,105 can be preferably located in before the parallel center-aisle.
The design of the position of the hull of ship 1 and rotating turret 5,105 makes at any time, and ice can rotate ship 1 with joint efforts best to the active force of ship, thereby makes the long axis of ship 1 parallel with the drift bearing of ice.Therefore, ship 1 is suitable for operation on having by the water surface of the possibility of a year or for many years ice parcel.
As mentioned above, the fore of ship 1 preferably has the ice breaking structure design.Ship 1 also can preferably include the stern with the function of opening ice.This will be useful, when the drift bearing of ice changes, for example along opposite direction drift.
In addition, ship 1 preferably has some propellers, and these propellers can rotate in order to assist to adjust the orientation of ship 1, can reduce the tension force on the mooring cable 11 simultaneously.
Figure 6 shows that the schematic diagram of the connected system in the better embodiment of the present invention.In known manner, a rotating turret 205a is arranged on and makes ship 201 to rotate around the central axis of rotating turret 205a on the ship 201.Be connected with a buoy 205b on the bottom of rotating turret 205a.Be connected with some mooring cables 211 on the buoy 205b.Therefore, ship 201 can rely on mooring cable 211 to berth by buoy 205b.
These drilling risers 215 pass buoy 205b, and are connected with rotating turret 205a through linkage 221 separately.
Some locking devices 223 are for buoy 205b and rotating turret 205a.Only schematically show locking device 223 herein.Locking device 223 preferably can be for being arranged on the hydraulically powered hook on the rotating turret 205a, and it can cooperate in order to rotating turret 205a is connected with buoy 205b with the corresponding lock bolt on the buoy 205b.
When ship 201 was docked in Arctic, the ice of bulk may cause producing bigger power to the effect of hull between buoy 205b and rotating turret 205a.In order to make locking device 223 not be subjected to the effect of bigger power, preferably can be provided with one according to the present invention and protrude guiding structural 225 in rotating turret 205a bottom.When buoy 205b and rotating turret 205a interconnect, protrude guiding structural 225 and extend in the groove 227 that buoy 205b goes up corresponding matching.The wall of groove 227 and protrude guiding structural 225 and replace and absorbed part lateral force between buoy 205b and the rotating turret 205a.When bearing, protrude contacting between guiding structural 225 and the groove 227 and make locking device 223 can not be subjected to bigger lateral forces from the excessive load on the mooring cable 211.Protrude guiding structural 22 and preferably be coniform, preferably, its diameter is being 5 to 10 meters.Yet other shapes also are feasible as polygonal protrusion guiding structural.In principle, the present invention also can adopt some less protrusion guiding structural or guide elements, in order to absorb the lateral force between rotating turret 205a and the buoy 205b.
When buoy 205b and rotating turret 205a linked together, a sealing ring 229 was with 231 sealings of the space between buoy 205b and the rotating turret 205a.Preferably, sealing ring 229 is rounded, and is arranged on the linkage 221 that is connected with drilling riser 215 and the outside of locking device 223.
When buoy 205b was connected with rotating turret 205a, buoy 205b was upwards pulled to and is replaced with rotating turret 205a, and made sealing ring 229 with space 231 sealings.When being in connection status, there is not or has only less lateral forces between buoy 205b and the rotating turret 205a.Replace and make sealing ring 229 with space 231 sealings when buoy 205b has been pulled to rotating turret 205a, the water in the space 231 can be extracted out through the piping (not shown).Therefore water in the space 231 substituted by air.Preferably, gas pressure intensity and the atmospheric pressure in the space 231 is approaching.Before water in space 231 was drawn out of, preferably, buoy 205b was by locking device 223 and rotating turret 205a mechanical connection.
The liquid pressure of buoy 205b below will be much larger than the gas pressure intensity in the space 231 that is positioned at buoy 205b top.Buoy 205b can be arranged on and be lower than the sea certain distance as 20 meters.The pressure of buoy 205b below then will be 2 atmospheric pressure, with regard to the sea; the pressure of buoy 205b below will order about buoy 205b to active force and upwards replace with rotating turret 205a and power of between generation, the size of power equals the accumulation that becomes of area with the pressure of sealing ring 229.When circular sealing ring 229 for example had 20 meters diameter, the thrust that makes progress will be 6300 tons approximately.Therefore, in the connected system of an embodiment of the present invention as shown in Figure 6, locking device 223 all helps buoy 205b to be connected with rotating turret 205a with liquid pressure.
As mentioned above, when the ice action of bulk during, will produce bigger lateral force between buoy 205b and the rotating turret 205a in the hull of ship 201.If locking device 223 for example is the structure (not shown) that hook cooperates with bolt, with absorbing side forces, the lateral force of absorption is with excessive.This will cause difficulty to solving to connect, and for example hook be pulled out with bolt and will separate, when huge masterpiece is used for both.When buoy 205b separates with rotating turret 205a, the invention provides a solution and be included in buoy 205b and earlier locking device 223 opened from latched position before separating with rotating turret 205a.As previously mentioned, even all helping buoy 205b to be connected locking device 223 with rotating turret 205a, opens liquid pressure from latched position.At locking device 223 after latched position is opened, transporting water in the space 231 between buoy 205b, rotating turret 205a and sealing ring 229.This makes that buoy 205b begins to sink, and then protrusion guiding structural 225 is separated with groove 227.
When buoy 205b began to sink, if the lateral force of inciting somebody to action between buoy 205b and the rotating turret 205a is bigger, bigger power may produce on the surface of protruding between guiding structural 225 and the groove 227.Figure 7 shows that one of the present invention preferably embodiment with the problem that solves in big.Herein, protrusion guiding structural 225 is tapered.The opposite taper of one-tenth of groove 227 correspondences.When buoy 205b is connected with rotating turret 205a, protrudes guiding structural 225 and will cooperatively interact the description of the specific embodiment as shown in Figure 6 with groove 227.In this position, protrude guiding structural 225 and groove 227 absorbing side forces in an identical manner.When buoy 205b and rotating turret 205a when larger side separates under the power effect, buoy 205b will sink, meanwhile, mooring cable 211 draws buoy 205b to the next door.Protrusion guiding structural 225 will be guaranteed not have excessive masterpiece with the conicity of groove 227 and be used for their surface separately.Preferably, the permission threshold of the design of the conicity lateral force that can apply and protrude the permission threshold of active force between guiding structural 225 and groove 227 surfaces according to the mooring cable of hope.A possible range of conicity is an angle between a surface of horizontal plane and protrusion guiding structural 225 or groove 227
As shown in Figure 7, angle
Size between 45 ° and 70 °.For example, conicity can design like this and make in separating process, protrudes guiding structural 225 and does not contact with the surface of groove 227, perhaps can have contact and active force between the two that a maximum value predetermined, that allow is arranged.
In addition, conicity also is useful, in the process that connects buoy 205b and rotating turret 205a, can be used as guide element in order to proofread and correct and easily buoy 205b to be aimed at rotating turret 205a because protrude guiding structural 225 with groove 227.
The buoy 205b of shape as described above and rotating turret 205a, buoy 205b can well be provided with, even the load that the load on the side direction reaches on 6000 tons and the vertical direction reaches 4000 ton hours, buoy 205b also can break away from from rotating turret 205a.Yet the present invention is not limited to these numerical value, because these numerical value depend on the size of connected system in essence.
The above-mentioned connected system that is connected with ship 201 also can be used for connecting with the rotating turret that links to each other with ship 5,105 of other above-mentioned specific embodiment.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. ship, be used to drill for oil and/or the natural gas well, it is characterized in that, this ship can be drilled by a drilling riser, this drilling riser extends to a rotating turret on this ship from the oil well in seabed, wherein, this drilling riser can be connected with this ship disengaging below the bottom line of this ship, so that this ship can leave this drilling riser.
2. ship as claimed in claim 1, it is characterized in that: this rotating turret is provided with a bottom of separating with this ship, the bottom of this rotating turret will sink down into an equilbrium position after ship breaks away from, center at least a portion of this drilling riser in the bottom of this this rotating turret of equilbrium position.
3. ship as claimed in claim 2, it is characterized in that: the bottom of this rotating turret is connected with mooring cable, the bottom of this rotating turret has such buoyancy so that it keeps being suspended on the seabed from sinking down into the equilbrium position after ship breaks away from and making to the small part mooring cable, wherein, the bottom of this rotating turret provides the support of side direction simultaneously for this drilling riser.
4. ship, be used for probing and/or recover petroleum and/or the natural gas well, this ship can be connected with at least one oil recovery riser pipe, perhaps be connected with a drilling riser, this at least one oil recovery riser pipe is connected on the rotating turret on this ship, this drilling riser passes the rotating turret that is connected with this ship, it is characterized in that: a segment distance is extended to the bottom line below of this ship in the bottom of this rotating turret.
5. ship as claimed in claim 4 is characterized in that: a described segment distance is at least 3 meters.
6. ship, it can be used for probing and/or the recover petroleum and/or the natural gas well, this ship can be connected with at least one oil recovery riser pipe, perhaps be connected with a drilling riser, this at least one oil recovery riser pipe is connected on the rotating turret on this ship, this drilling riser passes a rotating turret that is connected with this ship, it is characterized in that: this ship comprises an ice barrier structure, and this ice barrier structure is from hull bottom extension downwards and partly around this rotating turret.
7. ship, it can be used for probing and/or the recover petroleum and/or the natural gas well, this ship can be connected with at least one oil recovery riser pipe, perhaps be connected with a drilling riser, this at least one oil recovery riser pipe is connected on the rotating turret on this ship, this drilling riser passes a rotating turret and is connected with this ship, it is characterized in that:
This ship has two long side surfaces between its fore and stern, on the length direction of two long side surfaces, at least 50% part is provided with an ice band, this ice band has an angle α between hull and horizontal plane, and the size of this angle α is spent between 80 degree 45; And
This rotating turret has a central axis, this central axis between the head and the tail vertical line of this ship apart from half place before the position of distance between the head and the tail vertical line of 0.15 to 0.45 times of this ship.
8. ship as claimed in claim 7 is characterized in that: if this gear has a parallel center-aisle, the central axis of this rotating turret can be positioned at this parallel center-aisle front.
9. as each described ship in the claim 1 to 8, it is characterized in that the length between the head and the tail vertical line of this ship surpasses 200 meters, beam is between 40 to 55 meters, and the draft of this ship is at least 10 meters.
10. connected system, be used for removably connecting one first element and one second element, this first element is arranged on the ship with the rotating turret form, this second element is accommodated some mooring cables and at least one riser pipe with the buoy form, it is characterized in that: when this buoy and this rotating turret interconnected, the water that this connected system can be by removing this buoy top was to reduce the hydraulic pressure on this buoy.
11. connected system as claimed in claim 10 is characterized in that:
Comprise that one protrudes guiding structural one of in this first element and second element;
In this first element and second element another comprises a groove, and the shape of this groove and this protrusion guiding structural are complementary and realize interconnecting between the two to accommodate this protrusion guiding structural; And
Comprising that a locking device, this locking device lock in this first element and second element another one of in this first element and second element can be with first element and the locking of second element machinery.
12. connected system as claimed in claim 11 is characterized in that: this protrusion guiding structural is coniform, and this groove has coniform with this protrusion guiding structural shape corresponding matching.
13. the method that a buoy (205b) is separated with rotating turret (205a) on the ship (201), wherein, this buoy (205b) is connected with at least one riser pipe (215) with mooring cable (211), it is characterized in that:
(a) in latched position locking device (223) is opened; In this latched position, this locking device (223) can be with buoy (205b) and the locking of this rotating turret (205a) machinery; And then
(b) transporting water to the top of buoy (205b) to strengthen the liquid pressure of buoy (205b) top.
14. the method that a buoy (205b) is connected with rotating turret (205a) on the ship (201), wherein, this buoy (205b) is connected with at least one riser pipe (215) with mooring cable (211), it is characterized in that:
(p) buoy (205b) is pulled to this rotating turret (205a); And
(q) take the water of buoy (205b) upper area away to reduce the liquid pressure of buoy (205b) upper area.
15. method as claimed in claim 14 is characterized in that: in step (p) afterwards, this buoy (205b) and this rotating turret (205a) machinery are locked by locking device (223).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310029885.3A CN103231779B (en) | 2008-02-05 | 2009-02-03 | A kind of ship that can be used for the drilling of many frozen water territory |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20080646 | 2008-02-05 | ||
| NO20080646 | 2008-02-05 | ||
| NO20080956A NO20080956L (en) | 2008-02-05 | 2008-02-25 | Ice-strengthened vessel for drilling and production in Arctic waters |
| NO20080956 | 2008-02-25 | ||
| PCT/NO2009/000040 WO2009099337A1 (en) | 2008-02-05 | 2009-02-03 | Ship for drilling and production in icy waters |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310029885.3A Division CN103231779B (en) | 2008-02-05 | 2009-02-03 | A kind of ship that can be used for the drilling of many frozen water territory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101978133A true CN101978133A (en) | 2011-02-16 |
| CN101978133B CN101978133B (en) | 2014-06-25 |
Family
ID=40952329
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310029885.3A Expired - Fee Related CN103231779B (en) | 2008-02-05 | 2009-02-03 | A kind of ship that can be used for the drilling of many frozen water territory |
| CN200980104887.6A Expired - Fee Related CN101978133B (en) | 2008-02-05 | 2009-02-03 | Ship for drilling and production in icy waters |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310029885.3A Expired - Fee Related CN103231779B (en) | 2008-02-05 | 2009-02-03 | A kind of ship that can be used for the drilling of many frozen water territory |
Country Status (8)
| Country | Link |
|---|---|
| EP (2) | EP3085614A1 (en) |
| KR (1) | KR101618886B1 (en) |
| CN (2) | CN103231779B (en) |
| CA (1) | CA2710072C (en) |
| NO (1) | NO20080956L (en) |
| RU (1) | RU2499724C2 (en) |
| SG (1) | SG188114A1 (en) |
| WO (1) | WO2009099337A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897286A (en) * | 2011-07-29 | 2013-01-30 | 弗罗泰克有限公司 | Mooring disconnect arrangement |
| CN103492660A (en) * | 2011-04-28 | 2014-01-01 | Bp北美公司 | Offshore fluid transfer systems and methods |
| CN104736429A (en) * | 2012-10-11 | 2015-06-24 | 帝斯曼知识产权资产管理有限公司 | Offshore drilling or production vessel |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA022073B1 (en) * | 2010-03-31 | 2015-10-30 | Мерск Сепплай Сервис А/С | An icebreaking vessel |
| WO2011120528A2 (en) * | 2010-03-31 | 2011-10-06 | Maersk Supply Service A/S | An icebreaking vessel |
| KR101687857B1 (en) * | 2010-03-31 | 2016-12-28 | 메르스크 서플라이 서비스 에이/에스 | Icebreaking vessel and method of breaking ice |
| DK177707B1 (en) | 2010-03-31 | 2014-03-24 | Maersk Supply Service As | Method of breaking ice |
| US9056658B2 (en) | 2010-03-31 | 2015-06-16 | Maersk Supply Service A/S | Icebreaking vessel |
| EP2934997A4 (en) * | 2012-12-21 | 2016-11-02 | Exxonmobil Upstream Res Co | System and method rapid disconnection of the drilling riser of a floating drilling platform |
| RU2533376C1 (en) * | 2013-07-10 | 2014-11-20 | Федеральное государственное унитарное предприятие "Крыловский государственный научный центр" | Self-moving drilling ship for operation in arctic conditions |
| KR20160084243A (en) | 2015-01-05 | 2016-07-13 | 오션어스(주) | Submersible mooring apparatus and submersible mooring system having the same |
| US10415315B2 (en) | 2015-05-29 | 2019-09-17 | Maersk Drilling A/S. | Arctic drilling process |
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| US3620181A (en) * | 1969-07-02 | 1971-11-16 | North American Rockwell | Permanent ship mooring system |
| US4650431A (en) * | 1979-03-28 | 1987-03-17 | Amtel, Inc | Quick disconnect storage production terminal |
| US4436046A (en) * | 1982-02-01 | 1984-03-13 | Braley William W | Ice-breaking hull |
| GB2118903B (en) * | 1982-04-16 | 1985-09-25 | Mitsui Shipbuilding Eng | Floating offshore structure |
| JPS58180393A (en) * | 1982-04-16 | 1983-10-21 | Mitsui Eng & Shipbuild Co Ltd | Mooring structure |
| US4637335A (en) | 1982-11-01 | 1987-01-20 | Amtel, Inc. | Offshore hydrocarbon production system |
| US4604961A (en) * | 1984-06-11 | 1986-08-12 | Exxon Production Research Co. | Vessel mooring system |
| JPS6130484A (en) * | 1984-07-24 | 1986-02-12 | Mitsui Eng & Shipbuild Co Ltd | Buoyant structure for iced sea |
| DE8802053U1 (en) * | 1988-02-18 | 1989-06-15 | Thyssen Nordseewerke GmbH, 2970 Emden | Icebreaking ship |
| NO326914B1 (en) * | 1991-09-30 | 2009-03-16 | Norsk Hydro As | Lathe for drilling or production vessels |
| EP0824447A4 (en) | 1995-05-11 | 2000-03-01 | Jens Korsgaard | Method and apparatus for mooring a vessel |
| EP0831023A1 (en) * | 1996-09-20 | 1998-03-25 | Single Buoy Moorings Inc. | Independently disconnectable buoy |
| US5794700A (en) * | 1997-01-27 | 1998-08-18 | Imodco, Inc. | CAM fluid transfer system |
| NO20060323L (en) * | 2006-01-23 | 2007-07-24 | Statoil Asa | Method and apparatus for positioning liquid installation, construction of ice cutter, and use thereof |
| NO330053B1 (en) * | 2006-05-22 | 2011-02-14 | Statoil Asa | System for loading and unloading hydrocarbons in ice water |
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2008
- 2008-02-25 NO NO20080956A patent/NO20080956L/en not_active Application Discontinuation
-
2009
- 2009-02-03 CN CN201310029885.3A patent/CN103231779B/en not_active Expired - Fee Related
- 2009-02-03 CA CA2710072A patent/CA2710072C/en not_active Expired - Fee Related
- 2009-02-03 WO PCT/NO2009/000040 patent/WO2009099337A1/en active Application Filing
- 2009-02-03 EP EP16170143.8A patent/EP3085614A1/en not_active Withdrawn
- 2009-02-03 CN CN200980104887.6A patent/CN101978133B/en not_active Expired - Fee Related
- 2009-02-03 SG SG2013008719A patent/SG188114A1/en unknown
- 2009-02-03 KR KR1020107017597A patent/KR101618886B1/en active IP Right Grant
- 2009-02-03 RU RU2010126667/11A patent/RU2499724C2/en active
- 2009-02-03 EP EP09708916.3A patent/EP2250075A4/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103492660A (en) * | 2011-04-28 | 2014-01-01 | Bp北美公司 | Offshore fluid transfer systems and methods |
| CN102897286A (en) * | 2011-07-29 | 2013-01-30 | 弗罗泰克有限公司 | Mooring disconnect arrangement |
| CN102897286B (en) * | 2011-07-29 | 2015-10-07 | 弗罗泰克有限公司 | Mooring disengagement gear |
| CN104736429A (en) * | 2012-10-11 | 2015-06-24 | 帝斯曼知识产权资产管理有限公司 | Offshore drilling or production vessel |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2250075A1 (en) | 2010-11-17 |
| CN101978133B (en) | 2014-06-25 |
| CN103231779B (en) | 2015-11-18 |
| WO2009099337A1 (en) | 2009-08-13 |
| RU2010126667A (en) | 2012-03-20 |
| KR20100118109A (en) | 2010-11-04 |
| EP3085614A1 (en) | 2016-10-26 |
| RU2499724C2 (en) | 2013-11-27 |
| EP2250075A4 (en) | 2013-08-21 |
| CA2710072A1 (en) | 2009-08-13 |
| CN103231779A (en) | 2013-08-07 |
| CA2710072C (en) | 2016-07-12 |
| SG188114A1 (en) | 2013-03-28 |
| KR101618886B1 (en) | 2016-05-09 |
| NO20080956L (en) | 2009-08-06 |
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