Mooring system with separated anchor lines and/or marine riser system

FIELD: transport.

SUBSTANCE: invention relates to shipbuilding and concerns vessels for hydrocarbon production. Vessel contains hull with tower, cavity in the tower and mooring buoy removably fixed in the cavity. Note that the buoy contains floating body and is load-carrying element for a number of marine risers extending to underwater well for hydrocarbon production and for a number of anchor lines connected with sea bed. When the buoy is attached to the cavity the buoy is fixed to lifting element connected with hoist on vessel to lift the buoy. Each anchor line and/or marine riser is connected by its top end with locking member, and the locking member is attached to pulling member. During lifting, each anchor line and/or marine riser is movable relative to floating body along the length of anchor lines and/or marine risers. After floating body has been connected with cavity the locking member engages with contact member on floating body thus supporting anchor line and/or marine riser hanging from floating body. Pulling member can be attached to mooring buoy by means of resilient device working in compression.

EFFECT: better operational performance of mooring system.

10 cl, 6 dwg

 

The invention relates to a vessel comprising a housing, which has a tower, a cavity in the tower and mooring barrel, a detachable manner fixed in the cavity, and the barrel has a floating body and is used as a bearing element for a number of riser columns, continuing to underwater well for the extraction of hydrocarbons, and multiple anchor lines attached to the seabed, and when connecting the barrel with the barrel cavity is attached to the pull element attached to the property on Board the winch for lifting buoy.

Such dissociate the mooring system disclosed in the patent application US 2007/155259. The known system includes mooring barrel, provided with a conical outer casing, and a corresponding conical cavity, or socket, in the tower of the ship, and this cavity has a conical shape corresponding to the conical shape of the outer casing of the barrel. The tower includes a turret containing piping for connection to the riser columns, and the turret is based on the reference node with the possibility of rotation relative to the tower in order to combine the pipelines with riser columns on the barrel only after the barrel is installed and fixed in the cavity of the tower. In this publication it is shown that support for sentry provides only the main top Sha is IR-roller bearing site of the tower; this site includes three mutually movable parts, which are directly connected to each other. In fact, this upper bearing site of the tower consists of two ball-and-roller bearings, placed directly one above the other and mutually connected by means of one General body element. Therefore, this upper reference site was very important and integral part of the system of maneuvering. The disadvantage of this combined and composed of mutually connected bearings ball / roller bearing Assembly consists in that in case of failure of one ball-and-roller bearing need to change the whole site - this means that the tower can no longer function as a system of maneuvering. This replacement cannot be performed in the open sea.

The known dimensions of the combined roller support system, due to limitations with the technology of production, limited to 8 meters, so it is not suitable for large dissociate systems, consisting of a tower and the buoy, in which the barrel is attached, for example, 20 or more riser columns.

Another patent application, which describes dissociate the mooring system with two separate reference systems, one of which is used only to rotate the turret to align to ncov pipe manifold with ends of the riser columns attached buoy, is US 5651708. In this patent presents detachable barrel, equipped with a support system that when disconnecting stays with the barrel. The barrel can be rotated attached to the drill shaft of the ship, below the waterline, without the use of towers. Disclosed additional upper supporting system-level deck, which provides support for the turret with the manifold so that the barrel is attached directly to the drill shaft of the vessel, and the turret and riser column on the attached barrel can be aligned on the same line. The turret is based on the reference system, so that even in the production process, when the hydrocarbons go through a flexible conduit connecting the manifold and mooring barrel, the turret can at any time to turn and align relative to the buoy. When exceeding the allowable angle of twist Flex between the barrel and the turret the turret turn attached to it through the gears from the motor to a new position, which eliminates twisting. Therefore, this system is not preferred for releasable systems of the buoy and tower sizes designed to fit a variety riser columns, and, of course, their use is not possible in the case of using only the rigid pipe.

Even dissociate the mooring system is disclosed in patent publication US 5823131. In this patent disclosed detachable buoy to provide buoyancy riser system designed only to provide support for the riser columns or risers, but it has not fixed anchor ropes.

This buoy riser system can be mounted inside a rotating tower, placed in the drill mine floating on the sea surface of the vessel, and it can be installed riser column, attached to the lines of flow and detachable manner and connected with a pipeline vessel above sea level. If the riser buoy system is disconnected from the tower, he kept submerged with cargo attached to the anchor-support buoy, which can be lowered to the seabed or lift inside the tower. The tower is attached directly to the seabed using a variety of anchor braces that are attached to the bottom of the tower. When the buoy riser system is released, the load attached to the buoy sinks to the bottom of the sea and provides a mooring buoy riser system, thereby limiting the displacement of the riser columns of acceptable values. Furthermore, since the anchor-support attached directly to the tower buoy riser system has a buoyancy sufficient l is nil to maintain the riser columns.

Another major aspect of this idea is that to secure the riser buoy system safety rope pull up using the winch, until the goods have not come in contact with the buoy. Then the buoy and cargo concatenate together, while the cargo is in contact with the bottom of the riser buoy system, and place them inside the borehole of the vessel. The main objective of this system is to provide the ability to attach pre-installed riser buoy system before installing the vessel and before attaching the anchor guy wires to the tower. Famous anchor system is not quickly releasable system, suitable for use in areas with cyclones or in Arctic waters, as the anchor-support remain attached to the tower. In addition, the simultaneous accession of the buoy, which is a supporting element for riser columns, and cargo is feasible only for relatively small buoys and cargo, but not for large buoys with large attached goods, as this would have required lifting capacity of the winch, exceeding the carrying capacity of all winches, produced in this art, and would entail the risk of creating large casting loads on hoisting cable that connects the buoy and the winch. This leads to the necessity of large winches, design to the which can withstand such casting load.

In these known systems, the ability to attach buoy/mooring drums to the tower is limited mainly by the sea and carrying capacity of the winch. When the barrel is lifted up to the tower, with the aim of re-attaching the caused motion movement of the barrel attached to the same movements of the vessel, when the barrel is close to the position of the connection. If the waves are too strong, then the connecting ropes are casting, load and acceleration force of the barrels that exceed the strength of the existing ropes to reconnect. This is especially true in the case of barrels (buoys) large size, for example, carrying 20 or more riser columns.

Therefore, the technical task of the present invention is to provide a releasable design for turret buoy anchor system having an enhanced ability to re-connect, even under severe sea state, for example, with wave height up to 6 meters

Another objective of the present invention is to provide a quickly releasable and easily connected again mooring system for a large number of riser columns and anchor braces, which reduced casting, the load on the hoisting cable.

Another object of the present invention is to provide a releasable mooring system that can work is to be with winches or chain hoists for re-connection, having a smaller size.

The system according to the invention should be easily connected and disconnected even in very harsh environmental conditions acting on the floating vessel, for example, on a floating production platform or FPSO FPU), conventional hoisting rope, such as a chain. The barrel must provide a large number of riser columns, for example, not less than 20 riser columns and 10 umbilicals, in the tower, to which you can attach mooring barrel. The system according to the invention should provide high availability in all weather conditions and to minimize idle time before re-connection, even taking into account the permanent location in harsh environmental conditions.

The vessel of the present invention differs in that each anchor brace and/or riser column attached to the top end to stoparea element and the locking element is attached to the lifting element, while lifting chain and the locking element movable relative to the floating body in the direction of the length of the anchor braces and/or riser columns, and after connecting the floating body cavity of the locking element engages with the contact element on the floating body, holding hanging from the floating body weight anchor guys and/or riser columns.

as caused by motion of the movement of the floating body of the barrel while the connection is not passed to the struts of the side mooring and/or the system riser columns, the maximum tension in the hoisting rope or cable rope or chain for re-connection is determined only by the elements of the lateral mooring system that describes the known parameters such as the initial tension, the vertical stiffness and dynamic characteristics. These components can be modified and optimized with a high degree of freedom, because without this transfer of motion for maximum tension in the hoisting rope during re-connection is reduced. It is also important from the point of view of design chain hoist or winch, if the hoisting cable is formed by a chain.

Since the maximum tension in the hoisting rope is already not affected by the mass and added masses of floating bodies, which are frequency-dependent, this allows you to avoid large dynamic loads on the lifting rope. Therefore, the size of the floating body can be increased indefinitely to accommodate larger systems riser columns if the system pulls up through installed on the barrel, guide blocks for anchor braces, or for placement of mooring systems of larger size, if the system pulls up through the mount riser columns on a barrel.

Growing is their dynamic tension in the hoisting rope during re-connection is significantly reduced due to the relatively low vertical stiffness and joined the mass of the side mooring. This gives the possibility to re-accession with a stronger sea.

While removing the barrel from the cavity separating mechanism according to the invention is not active, since the guide blocks lateral mooring system based on a floating body, and no relative movement is not allowed. The pre-tensioning anchor ropes and weight hanging riser columns form the payload after removing the barrel from the cavity in the hull of the vessel will cause the barrel down into the water to a predetermined depth, similar to the known mooring barrels.

One of the embodiments, a floating body contains one or more essentially vertical channel guides for anchor braces/riser columns at the lower end, intended for the direction of the anchor braces and/or riser columns through the mentioned at least one channel in a vertical direction from the lower end of the floating body to the upper end of the floating body, and anchor delays and/or riser column is connected at the upper end of the floating body with a locking element, which can engage with the contact element at the top of the floating body to prevent entry of the locking element in said at least one channel.

While re-attaching the barrel is rooted delays and/or riser columns raised by the hoisting rope, while floating body rises due to its buoyancy and can move relative to the anchor guys and/or riser columns. This allows you to separate movement from pitching reported floating body from the lifting cable and reduce casting load on the lifting cable. After joining the floating body to the cavity in the hull weight of the anchor braces and/or riser columns hanging from the floating body, as they descend into the floating body, while the brakes will not come into engagement with the contact elements on the floating body.

The locking element can contain circular frame attached to the lifting element. Anchor delays and/or riser columns can be mounted on the frame, and the lower end of the barrel may be provided with a shell guides, placed in a circular frame at the bottom of the barrel. A floating body of the barrel, to be enshrined in the cavity after re-connection, can contain essentially vertical channels, and anchor delays and/or riser columns deviate from the original corner location with shells, taking essentially vertical position, a floating body while moving the barrel up can be moved up and down relative to the anchor guys and/or riser columns.

The floating body may contain som is to essentially vertical frame elements, passing through vertical channels in the lower part of the floating body, with the anchor delays and/or riser columns attached to the frame elements and can be moved vertically together with the frame elements, and the lower ends of the frame elements end contact element for engagement with a floating body, defining the lowest position of the locking element with respect to the floating body.

Frame elements can be moved up and down along the vertical channels during lifting of the barrel into the cavity by means of a lifting element attached to the frame element, while the floating element may rise due to its buoyancy. After joining the floating body to the cavity of the brakes on the vertical frame element are in the lowest position, abutting the contact element floating body.

According to alternative implementation, the floating body includes multiple grooves, the lifting element contains several ropes passing from the upper part of the floating body to each anchor delays and/or riser columns grooves and attached to the locking elements, which can be moved along the length of the grooves, and a floating body contains the lower contact element, which can hold the locking elements.

The lifting element directly the NGOs connected by means of a rope with anchor braces and/or riser columns and pulls delays or columns up while the floating body can be moved up and down along the rope during a connection, which allows you to separate the motion of the floating body from the anchor guys and/or riser columns.

To prevent transverse movement relative to the anchor guys and riser columns, when the barrel is immersed and detached, the lower contact element floating body can be hooked with locking elements without the possibility of rotation.

According to alternative implementation, the casting, the load on the hoisting cable is reduced by attaching a hoisting rope to barrel through the device, working in compression. The device, working in compression, may contain elastic element, such as a rubber cushion or spring, and pulls the lifting rope down when the tension of the hoisting rope is weakened because of the movement of the ship down, caused by motion. Thus, the hoisting cable remains taut, and casting loads are reduced.

Working on the compression device may include a lower flange and a compression spring, continuing between the flanges, and a lifting element attached to the lower flange, the upper flange engages with the locking element when lifting the barrel, the spring is compressed under the action of moving the lower flange up by the lifting device.

To prevent the treatment of damage to the top of the barrel lifting rope when the tension is weakened during attach the barrel to the cavity or detaching it, lifting the rope near the upper part of the floating body may be provided with a flexible sheath. If the hoisting cable is formed by a chain, the shell may be a flexible hose is slightly larger than the width of the chain so that the chain was at a distance from the barrel in the case of a sagging rope.

Some embodiments of the vessel according to the invention will be explained in detail with reference to the accompanying drawings, where:

Figure 1 shows a schematic view in section of a vessel according to the invention.

Figure 2 shows a fragment of the upper part of the barrel, is presented in figure 1, on an enlarged scale.

Figure 3 shows a variant implementation of the flexible connection of the floating body with anchor braces contained in the vertical channels.

On figa and 4b show an alternative implementation of the flexible connection of the floating body with anchor braces through vertical frame elements.

Figure 5 shows an additional variant of implementation of the flexible connection of the floating body with anchor braces by means of hoisting ropes passing through the channels in the floating body.

Figure 6 shows a variant implementation of the elastic shock absorber attached to the hoisting rope.

Figure 1 presents the Yong views in the context of releasable system anchor tower according to the invention.

The system consists of a cylindrical tower 1, located inside the cylindrical drill shaft 2, a built-in enclosure 3 of the vessel 14, which, for example, may be a floating production platform (FPU) or floating oil terminal (FPSO). The supporting structure of the tower, connecting the tower with the drilling shaft of the vessel and centering the tower relative to the drill shaft, consists of the upper trolley with 4 bearings of large diameter and (if necessary) lower bearing system 5 with a gasket with a low coefficient of friction.

Most mnogopalubnyh superstructure 6 is located on top of the tower 1, and it is mounting and operating equipment, manifolds 7 and the group of liquid hinges 8 to the liquid or gas intended for umbilicals, on which the act is extracted and transported to shore fluids, as well as umbilicals control systems and umbilicals for supply of reagents.

Steel frame is located above the superstructure and surrounds her. The casing 9, is attached to the vessel, provides a support for the pipeline, continuing from the group of hinges 8 to the floating production platform, provides access to the tower from the vessel 1, and drives the rotating portion of the hinge and provides support for the wintering panels. Tower design allows maintenance and repair of the nternet during operation, that maximizes its availability throughout the project cycle the project life cycle.

The upper end of each anchor-support 10, whereby the vessel 14 is attached to the seabed 15, directly attached to the universal joint with low friction on the hull of the buoy 11, which is installed in the conical cavity 16 at the lower end of the tower 1. Riser column 12, which is attached to the mouth 15 of an underwater well for the extraction of hydrocarbons, attached by their upper ends to the platform 17 for riser columns of the barrel 11. When mooring barrel 11 is attached to the vessel or floating production platform (FPU), the upper end of the barrel is clamped in the cavity by means of hydraulic clamps 25. Space 17 for riser columns rises above the level 23 with a maximum draught of the vessel. This ensures that all conditions of pipeline equipment is constantly in a dry environment that facilitates the access and maintenance.

Mooring barrel 11 performs two different functions. First, when the vessel 14 is connected to the barrel 11, the barrel passes on the moored vessel load from the anchor braces 10, which is attached to its outer shell. Secondly, when the vessel is disconnected from the buoy 11, the barrel falls down to a predetermined depth below the level of the mo is I support the anchor ropes 10 and riser column 12 at this depth. Given the depth can be calculated, for example, as 30-35 meters below water level, so disconnected the barrel stops and takes a stable position under the active area of action of the waves. For example, in Arctic waters with icebergs barrel can stop at a depth of even more than 100 m below water level, to avoid any contact with the icebergs.

The design of the buoy 11 contains a reinforced cylindrical shell with waterproof internal bulkheads that divide the barrel at the office. In the centre of the barrel is the inner cylinder 18 with thick walls, in which place and direct lifting or tie rope 19 which is attached to the winch 20. The upper part of the barrel is provided with a connecting ring which can be fixed connecting latches 25, 25', placed inside the tower. The I-shaped pipe, according to one of embodiments may be mounted in the center of the barrel, riser columns and subsea umbilicals, and end at the bottom of the barrel 11, providing support for socket riser columns and/or umbilicals. Flexural amplifiers and sockets riser columns protected from ice, swim under the hull of the vessel, a conical skirt 13 at the bottom of the buoy. Alternatively, you can provide a remedy GRT ice is, such as a skirt or a fence at the bottom of the vessel to protect the bore mine from penetration of ice when the vessel is disconnected from the buoy, or to protect the buoy and riser columns, when mooring barrel attached to the tower.

The buoyancy required for holding the riser columns 12 and anchor supports 10 at a certain level in the disconnected state, provided by the Central office and branches that are installed on the periphery of the barrel.

The system housing such as to minimize the contact between the body of the barrel and parts of the tower during disconnection, so there's no risk of accidental flooding. However, waterproof barrel is divided into compartments, in order to provide sufficient buoyancy in case of accidental flooding of one compartment.

When the clamps or hydraulic clamps 25 unlock, the barrel 11 is released from the cavity 16 and is lowered to a predetermined depth below the water level 23. To reattach the barrel 11 to the vessel 14, the vessel 14 is slowly coming to a submerged mooring barrel 11 until you have the opportunity to capture floating towing-mooring rope, coupled with a part of the hoist rope 19 which remains attached to the barrel 11 and is located within the cylinder 18. Two sections of the winding rope 19 skipaway, floating tow-shvartovaniya removed and hoisting cable 19 return overboard. In the case of reconnection under the ice connection of the parts of the hoisting rope is made directly in the dry part of the drill shaft of the tower.

Lifting winch 20 is brought into action so that the mooring drum 11 is slowly climbed under the vessel 14 and entered into the cavity 16 of the tower, while the upper flange of the barrel will not come in contact with centralizer constructive connector. The clamps 25 structural connector is closed, and mechanical latches will be powered. Now the boat can safely re-attach and attach through the tower 1 to the anchor-supports 10 buoy 11.

Anchor ropes 10 are held up by vertical channels 40, 41 through the barrel 10 along the guide rails 42, 42' and 43, 43' for anchor braces, which may contain pulleys at the lower and upper ends of the barrel 10 for deviations from the inclined position essentially in a vertical position. The upper ends of the anchor braces 10 are connected to the frame 44, which is attached to the hoist rope 19. Frame 44 forms a locking element, which rests against the thrust surface of the barrel 11 in the United state, shown in figure 1, so that the weight of the anchor braces 10 and riser columns 12 is retained by the barrel. During attachment of the barrel 11, the anchor ropes are pulled up through the frame 4, and the barrel rises due to its buoyancy. The barrel 11 can move relative to the anchor braces 10 through vertical channels 40, 41, through which the anchor ropes move, aim with the help of the guides 42, 42', 43, 43' for anchor braces. In this way maintain the tension on the lifting rope 19 during movement of the vessel 14, caused by vertical motion, and to prevent the voltage of the pull acting on the hoisting cable 19. After mounting the barrel 11 in the cavity 16 of the frame 40 is put on top of the barrel, the top of which contains a hard surface to support the frame 40. After removing the barrel 11 from the cavity 16 of the frame 40 remains lying on top of the drum and the drum with anchor braces is lowered to a predetermined depth below the waterline 23, preferably below the zone of activity of the waves.

Mooring barrel 11 is attached, without regard to its angular position. Only after the vessel 1 is securely attached to the barrel 11, the turret 31 with all the manifold 7 turn, combining with the position of the pipelines on the barrel, as shown in detail in figure 2. The fact that the entire manifold 7 can be oriented in a certain way relative to the tower 1, avoids the procedure of combining the manifold and pipeline buoy at a critical stage reconnect when mooring back the 11 attached only to the hoisting winch 20 and she is still not attached securely to the tower 1.

As further shown in figure 2, with the purpose of rotation around the vertical axis of the manifold 7 in tower 1 unlocks, temporary support system 32 sentry guns operate by moving it in the vertical direction, so that the turret 31 tower rises from the ground and positioning the engine sentry gun is actuated. Slow rotation of the turret 31 manifold 7 of the tower lead to the correct position in which the ends of the pipes of the manifold are located on the same line with the ends of the pipe riser columns buoy. Monitoring this operation is performed from the control panel of the engine, and the operation is controlled lower deck manifold. Upon reaching the correct position turret manifold is automatically fixed, and temporal reference system sentry inactivate the hydraulic displacement of the support wheels 32 vertically by a few millimeters, so upbeat and correctly oriented, the turret 31 is based on the tower 1 in a fixed angular position.

Then a flow line or pipe 35, in front of the direction from the hydraulic connectors 33 in the coupling of the barrel 11 and the cavity 16, is lowered back into position. Hydraulic connectors 33, connecting the ends of the riser columns 12 and pipe 35 of the manifold 7, cover and test for leaks. As soon as insulating klapa is s open, production can be resumed. The umbilicals connect using a simple procedure.

According to a variant implementation, presented in figure 3, the barrel 11 includes a floating body 57 with vertical channels 40, 41. At the lower end 47 of the barrel 11 includes a round frame 45 with the pulleys 42, 42' for the circuit. Frame 45 can be rotated relative to the floating body 57 around the vertical axis. At the upper end 48 of the barrel anchor ropes 10, 10' are attached to the frame 44 by means of the locking device 49, 49' to the chain. By turning the frame 45 pulleys 42, 42' keep in line with the locking device for the circuit 49, 49'. On a circular frame 44 can be provided with elastic buffer device 50 for contact with fixed contact surface 51 on top of the barrel 11. In the United state, when the barrel 11 is fixed in the cavity 16 of the vessel, the buffer device 50 in contact with the surface 51 to transfer the weight of the anchor braces 10, 10' and riser columns 12 of the barrel 11. Also after disconnecting the barrel 11 from the cavity 16 of the buffer unit 50 which engage with the top surface 51 of the barrel.

4 and 4A shows an alternative implementation in which the frame 44 includes a vertical frame elements 55, 55', attached to the lower stopper 56 to which are attached the upper ends of the anchor braces 10, 10'. The vertical frame elements 55, 55' can be moved against the sustained fashion floating body 57 of the barrel 11 through the vertical channels 59, 59'. The vertical frame elements 55, 55' and/or the stopper 56 in the disconnected state are at rest, based on a floating body 57 of the barrel 11, and do not rotate, so that can't happen any transverse rotation of the floating body 57 for anchor braces 10, 10'. To prevent deflection of the frame 44 relative to the floating body 57 of the retainer 56 may contain protrusions 60 fitted in the notches 61 in the floating body 57.

On fig.4b shown rigid cellular construction of the frame 44, the vertical elements 55, 55' and the stopper 56 at the lower edge of the frame 44.

Figure 5 presents an implementation option, in which the upper connector 65 is attached to the ropes 66, 66', passing through the inclined channels 67, 67' in the floating body 57 of the barrel 11. Ropes 66, 66' is attached to the stoppers 69, 69', attached to the upper ends of the anchor braces 10, 10'. The stoppers 69, 69' can engage with the notch 70 of the floating body 57 to prevent lateral rotation of the floating body 57 for anchor braces 10, 10'.

Figure 6 shows an implementation option, in which the hoisting cable 19 is attached to the absorber 71 containing the lower flange 76, the upper flange 77 and a cylindrical compression spring located between the flanges 76, 77. Hoisting cable 19 is attached to the bottom flange 76. When the barrel 11 is pulled up over the hoisting cable 19, the upper flange 77 of the shock absorber 70 UPI is moved into the deck 79, and upward force applied to the lower flange 76 by a hoisting rope 19, compresses the spring 78. The barrel moves up, while the spring 78 remains compressed. The weakening of the voltage elevating rope 19, for example, due to the swaying, causes the spring 78 to stretch so that any slack hoist rope 19 is compensated. According to a variant implementation, presented in Fig.6, the tension of the hoisting rope is weakened when the barrel is attached to the cavity 16 of the vessel or when the barrel 11 let down after disconnecting from the cavity, and the upper flange 77 rests on the deck 80. The circuit 19 may be collected in a Central office or cable box 80.

Near the upper part of the barrel 11, the circuit 19 is supplied sheath 81, which may be made of a flexible hose, which is somewhat greater than the width of the chain. The shell 81 prevents the fall of the circuit 19 on the upper surface of the barrel 11, if the tension of the chain 19 will weaken and damage the circuit of the upper part of the barrel 11.

1. The vessel (14), comprising a housing (3) with a tower (1), the cavity (16) in the tower and mooring barrel (11)attached to the housing with removable, and the barrel has a floating body (57) and is used as a bearing element for multiple riser columns (12), continuing to underwater wells (15) for production of hydrocarbons, and some of the anchor braces (10, 10')connected to the seabed, while when attaching the barrel to the barrel cavity attached to the pull element (19)which is connected to a winch (20) on the vessel (14)for lifting barrels, wherein each anchor guy (10, 10') and/or riser column (12) is connected to the top end with a locking element(44, 55, 55', 56, 65, 66, 66', 69, 69'), moreover, the locking element is attached to the pull element (19), during lifting each anchor brace and/or riser column is movable relative to the floating body (57) in the direction of the length of the anchor braces and/or riser columns, and after connecting the floating body with a cavity (16) of the locking element(44, 55, 55', 56, 65, 66, 66', 69, 69') engages with the contact element (48, 61, 70) on the floating body, supporting hanging from the floating body anchor quickdraw and/or riser column.

2. The vessel according to claim 1, in which a floating body (57) contains one or more essentially vertical channels (40, 41) with guides (42, 42') for anchor braces/riser columns at the lower end, intended for the direction of the anchor braces and/or riser columns through at least one channel in the vertical direction from the lower end (47) of the floating body (57) to the upper end (48) of the floating body, and anchor delays and/or riser column is connected at the upper end of the floating body with a locking ale is Tom (44, 49, 49'), made with the possibility of engagement with the contact element (48) at the top of the floating body (57) to prevent entry of the locking element in at least one channel (40, 41).

3. The vessel according to claim 2, in which the locking element has a round frame (44)attached to the pull element (19).

4. The vessel according to claim 2 or 3, in which the guides (42, 42') for anchor braces and/or riser columns contain shell, mounted on a circular frame (45) at the bottom of the floating body (57).

5. The vessel according to claim 1, in which a floating body (57) contains several essentially vertical frame elements (55, 55'), passing through vertical channels (59, 59') to the bottom of the floating body, and anchor ropes (10, 10') and/or riser column (12) is attached to the frame elements (55, 55') and made with the possibility of displacement in the vertical direction together with the frame elements, the lower ends of frame elements (55, 55') end of the contact element (60) for engagement with the floating body (57) and determine the lower position of the locking element relative to the floating body.

6. The vessel according to claim 1, in which a floating body (57) contains several grooves (67, 67'), the lifting element contains multiple lines (66, 66'), continuing from the upper part of the floating body to each anchor delays (10, 10') and/or riser column (12) in the grooves and connected the s with locking elements (69, 69'), which are made with the possibility of displacement along the length of the grooves, and a floating body (57) contains the lower contact element (70)that can hold the locking elements (69, 69').

7. The vessel according to claim 6, in which the lower contact element (70) engages with locking elements (69, 69') without a possibility of rotation.

8. The vessel (14), comprising a housing (3), which has a tower (1), the cavity (16) in the tower and mooring barrel (11), a removable manner fixed in the cavity, and the barrel has a floating body (57) and is used as a bearing element for multiple riser columns (12), continuing to underwater well for the extraction of hydrocarbons, and several anchor braces (10, 10')attached to the seabed, and when connecting the barrel with the barrel cavity is attached to the pull element (19)attached to located on boat winch (20) for lifting the barrel, characterized in that the pulling element (19) is attached to the barrel (11) through an elastic device (71), working in compression.

9. The vessel of claim 8, in which operating the compression device (71) contains the upper flange (77), the lower flange (76) and compression spring (78), continuing between the flanges, thus pulling element (19) is attached to the bottom flange (76), with the upper flange configured to engage with a locking element (79) when lifting the barrel, and the spring is compressed under d esteem movement of the upper flange up by the lifting device.

10. Vessel under item 1, in which the pulling device (19) near the upper part of the floating body provided with a flexible sheath (81).



 

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FIELD: mining.

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2 dwg

FIELD: mining.

SUBSTANCE: invention proposes a disconnection method of a buoy from a mooring turret in a system including a ship containing a mooring turret installed so that it can be rotated on the ship, and a buoy carrying uprising pipelines, which can be attached to the mooring turret and disconnected from it. The system also includes moorings attaching the buoy to mooring points at sea bottom and loading the buoy with mooring forces. Before the buoy is disconnected from the mooring turret, moorings are manipulated so that at least at disconnection the mooring forces are decreased or even disappear. A retaining and releasing device includes a housing with at least two clamps for the mooring, which are located at some distance from each other and made so that an excessive part of the mooring can be located between them. At least one clamp can be installed to the mooring lowering position.

EFFECT: improving reliable and safe performance of a disconnection operation of a buoy from a mooring turret.

11 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to oil production in arctic waters, particularly, to ship for use therein. Proposed ship is available in two versions. In compliance with first version, ship can drill via drill water separation string extending from sea bottom well to turret arranged aboard the ship. Said drill water separation string can be detached from the ship located under its main line. At turret separation from the ship its bottom part submerges along water separation column to occupy equilibrium position whereat its surrounds at least partially a part of drill water separation column. In compliance with second version, proposed ship for drilling oil and/or gas production wells can be connected with at least one water separation column connected with turret coupled with ship of drill water separation column extending through the turret connected with the ship. Two lengthwise boards extend between ship fore and aft with ice belt made at, at least 50% of their length, the angle a of 45-80 degrees between ship hull and horizontal line.

EFFECT: lower load at anchoring and maneuvering devices, improved conditions of operation in arctic waters.

5 cl, 18 dwg

FIELD: transport.

SUBSTANCE: breakaway ship mooring device comprises mooring buoy 11 and swivel arranged there above. Mooring buoy comprises central element 2 for anchoring to sea bed including several channels to house vertical pipelines 4. Mooring buoy external element 5 surrounds is central element to turn thereabout. Said external element can be located and secured in the ship appropriate recess. Aforesaid swivel is located above mooring buoy to provided for space there between to allow load lifting means to pass there through in buoy up/down displacement during connection/ disconnection. Besides that is a manifold arranged between buoy and swivel.

EFFECT: improved operation, simplified design.

7 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to platforms for underwater oil extraction in zones of extreme sea and weather conditions. Platform 10 comprises a detachable anchoring system 1, 2, 3 to anchor lines 13 at sea bed and connection pipes 14 thereat. Anchoring system comprises mooring buoy 1 for anchor lines and pipelines of connection with sea bed. Note here that said buoy is a circular element. Turntable 2 extends inside cavity 4 crossing the floating platform hull over its entire height. Said mooring buoy is secured at turntable 2 under platform hull. Turntable 2 comprises tight external structure 2b with bottom 2c tightly connected with lower end of external structure 2b. Tubular external structure 2b incorporates internal structure 2a jointed with deck level with its top end 2a1. Internal structure and tubular external structure interact, on one side, with one lower rolling bearing or slider bearing to allow rotation of internal structure without that of external structure when the platform is driven around cavity vertical axis ZZ' and tight tubular outer structure. Lower rolling or slider bearing 51, 52 is located above water surface inside tight external structure.

EFFECT: simplified and reliable design, improved servicing conditions of rolling bearings.

10 cl, 8 dwg

FIELD: transport.

SUBSTANCE: invention relates to floating oil production platform. Platform 10 comprises a detachable anchoring system 1, 2, 3 to anchor lines 13 at sea bed and connection pipes 14 thereat. Besides it comprises mooring 1 buoy for connection of anchor lines and first pipelines 14 of connection with sea bed and turntable 2 arranged inside space 4 crossing the platform hull over its entire height. Said mooring buoy is secured at turntable 2 under platform hull. Platform includes the system for connection/disconnection of said mooring buoy to/from turntable bottom wall 2c that comprises multiple lifting cables 20b and pumps 22 to deliver water in mooring buoy valve chamber 30.

EFFECT: oil production in extreme sea and weather conditions.

15 cl, 9 dwg

FIELD: transport.

SUBSTANCE: invention relates to underwater hydrocarbons production, particularly, to detachable mooring anchor turntable system and method of attachment of mooring buoy to turntable. Vessel 14 comprises hull 3, shaft 2 extending for hull top 40 to bottom 41, turntable 1 arranged to turn in said shaft on turntable support 4, 5 and manifold bearing structure 31. Said manifold bearing structure accommodates one or more pipelines. Said structure can be turned on turntable by manifold support 32. Turntable 1 comprises chamber 42 to receive mooring buoy 11 with one or several risers 12. Said risers can displace vertically the actuators 33 nearby manifold support 32 for vertical displacement of manifold bearing structure 31 relative to turntable 1 between turning position whereat structure 31 may turn relative to turntable and locked position whereat structure 32 is locked.

EFFECT: fast and reliable attachment/detachment of mooring anchor turntable system in bad weather.

14 cl, 17 dwg

FIELD: transport.

SUBSTANCE: ship 14 comprising hull 3 with chamber 42 arranged nearby bottom 41 to house mooring buoy 11, lifting device 20, 45 mounted on the hull and including cable 17. Said cable passes through chamber 42 to weight 16 located under ship bottom 41. Mooring buoy 11 is secured to cable 17 and includes mooring lines secured to sea bed 19. Said lines are arranged in chamber 42 for connection to turret 1. The comprises central shaft 44 with cable 17 passed there through to displace along said cable. Weight 16 is arranged at cable, buoy or there under. Retainer 21 is arranged at cable to engage with buoy and to lock buoy and cable displacement and secured to the cable nearby buoy top or bottom ends.

EFFECT: fast connection of disconnection of mooring buoy.

10 cl, 13 dwg

FIELD: transport.

SUBSTANCE: invention relates to underwater oil extraction in zones of extreme sea and weather conditions. Proposed platform 10 comprises mooring device 1 for fastening anchor ropes and connection pipelines 14 to sea bed. Floating platform comprises two mooring buoys 1-1, 1-2 whereto anchor ropes 13 and pipelines 14 of connection with sea bed. Two mooring buoys may be individually connected and disconnected with respect to turntable 2 whereto they are secured from the bottom.

EFFECT: safe detachment of pipelines from sea bed and platform anchorage.

14 cl, 14 dwg

Anchor system // 2517634

FIELD: transport.

SUBSTANCE: invention relates to anchor system for semi-submerged open-water structure with the hull that has top and bottom waterlines (2, 1). Note here that said anchor system has mooring line (4) extending from locked point at sea bottom (8) to attachment device of said structure. Note also that a part of said mooring line nearby said attachment device is composed by the chain. Said attachment device comprises hawse-hole (10) and chain retainer (22) located under said bottom waterline. Chain retainer (22) is located in dry chamber inside outer case. Note here that said chain retainer is tightly connected with hawse-hole on one side and, on the other side, with hawse-hole tune (9). Said tube extends inside the case at a distance from said bottom waterline. Hawse-hole extends from chain retainer towards outer case and is tightly connected therewith.

EFFECT: fast and easy detachment of anchored structure.

10 cl, 17 dwg

FIELD: transport.

SUBSTANCE: invention relates to device for detachment of moored floating offshore structures from buoy mooring when they are exposed to acts of nature. Device for mooring detachment for floating offshore structure and buoy mooring contains at least one high-pressure water jet propeller, supplemental low-profile contact surfaces on floating offshore structure and buoy mooring, detachable mechanical restraints. High-pressure water jet propeller is located on floating offshore structure and is facing buoy mooring to direct water between offshore structure and buoy mooring during detachment operation. Detachable mechanical restraints engages floating offshore structure and buoy mooring together during normal drilling and production operations.

EFFECT: quick detachment and quick increase of distance between mooring and floating offshore structure.

7 cl, 6 dwg

FIELD: transport.

SUBSTANCE: invention relates to ship building, particularly, to Arctic floating facilities. Invention covers the mooring system for floating facility, for example, drilling rig. Floating facility has platform for drilling, extraction or other works in seat and support to provide ballast and stability under water level in sea. Mooring system comprises multiple anchors arranged at sea bottom, radially around the support and multiple mooring links. First end of every mooring link is connected with the support while second end of every mooring link is connected with appropriate anchor. Every mooring link additionally comprises at least two, in fact, stiff links hinged to allow relative displacement of adjacent links in one plane. Invention covers also the method of development of mooring system and method of its displacement.

EFFECT: higher reliability of mooring system.

24 cl, 17 dwg

FIELD: transport.

SUBSTANCE: invention relates to ship-raising, particularly, to equipment for ship anchoring. Proposed method proceeds from exploiting of mooring anchor mooring force, ship load mechanism load-carrying links being secured to said anchors. Damaged submarine hull with stocked devices is used as said mooring anchors. Synthetic cables of accumulation reels of the ship left and right boards are laid on the drums of automatic transit winches and passed via board hawse-holes in automatic clamp ears. Guide cable of automatic tracking winch is passed through clamp body to be lowered overboard. Guide cable bitter end is run over damaged submarine stock roller to drive said winch to cable tension tracking mode. Said clamp is downed on guide cable to automatic coupling with stock rod to switch on the transit winch to automatic retention mode above damaged submarine at preset tension force. Proposed device comprises mooring anchors, load-carrying links and load mechanisms. Damaged submarine hull with stocked devices is used as said mooring anchors to be coupled with stocked device, automatic tracking winches with guide cables, automatic transit winches and guide reels with synthetic anchor cables.

EFFECT: simplified rescue procedure, fast anchoring.

2 cl, 3 dwg

FIELD: mining.

SUBSTANCE: invention proposes a disconnection method of a buoy from a mooring turret in a system including a ship containing a mooring turret installed so that it can be rotated on the ship, and a buoy carrying uprising pipelines, which can be attached to the mooring turret and disconnected from it. The system also includes moorings attaching the buoy to mooring points at sea bottom and loading the buoy with mooring forces. Before the buoy is disconnected from the mooring turret, moorings are manipulated so that at least at disconnection the mooring forces are decreased or even disappear. A retaining and releasing device includes a housing with at least two clamps for the mooring, which are located at some distance from each other and made so that an excessive part of the mooring can be located between them. At least one clamp can be installed to the mooring lowering position.

EFFECT: improving reliable and safe performance of a disconnection operation of a buoy from a mooring turret.

11 cl, 2 dwg

FIELD: mining.

SUBSTANCE: chains with anchors are moved by means of tow cars - anchor bringing machines till their installation point. First, anchor chains are moved under ice with their further lifting onto decks of tow cars - anchor bringing machines by means of towing winches using guiding ropes that are attached to end shackles of anchor chains and moved with remotely piloted underwater vehicles of a torpedo-like shape of a captive type to tow cars - anchor bringing machines. After end clamps of anchor chains are lifted onto decks of tow cars - anchor bringing machines, anchors are attached to them.

EFFECT: safe and effective positioning of a drilling ship under ice conditions.

5 dwg

FIELD: transport.

SUBSTANCE: invention relates to connection assy for mooring chains of, for example, FPSO ship (extraction, store and shipment ship) or floating sea structure. Proposed assy 4 comprises chain connector 5 with first pin 14 and means 25 to coupled mooring chain 3 with connector 5. Proposed assy additionally includes channel-forming appliance 6 attached to floating structure 1 and having bottom and top ends, mooring chain lock 11 made at said top end. Channel-forming appliance 6 extends in floating structure 1 from its bottom to higher level that can be located above sea surface. Channel-forming appliance bottom end has the seat 18 for bearing of first pivot 14 of chain link. Connector 5 can displace in channel-forming appliance. Note here that there are means 27, 28 to displace chain connector between the first position whereat first pin 14 is located at channel-forming bearing seat 18 and second position specified by said appliance whereat chain connector may be accessed.

EFFECT: simplified connection to mooring chain.

10 cl, 8 dwg

FIELD: transport.

SUBSTANCE: invention relates to oil production in arctic waters, particularly, to ship for use therein. Proposed ship is available in two versions. In compliance with first version, ship can drill via drill water separation string extending from sea bottom well to turret arranged aboard the ship. Said drill water separation string can be detached from the ship located under its main line. At turret separation from the ship its bottom part submerges along water separation column to occupy equilibrium position whereat its surrounds at least partially a part of drill water separation column. In compliance with second version, proposed ship for drilling oil and/or gas production wells can be connected with at least one water separation column connected with turret coupled with ship of drill water separation column extending through the turret connected with the ship. Two lengthwise boards extend between ship fore and aft with ice belt made at, at least 50% of their length, the angle a of 45-80 degrees between ship hull and horizontal line.

EFFECT: lower load at anchoring and maneuvering devices, improved conditions of operation in arctic waters.

5 cl, 18 dwg

FIELD: transport.

SUBSTANCE: breakaway ship mooring device comprises mooring buoy 11 and swivel arranged there above. Mooring buoy comprises central element 2 for anchoring to sea bed including several channels to house vertical pipelines 4. Mooring buoy external element 5 surrounds is central element to turn thereabout. Said external element can be located and secured in the ship appropriate recess. Aforesaid swivel is located above mooring buoy to provided for space there between to allow load lifting means to pass there through in buoy up/down displacement during connection/ disconnection. Besides that is a manifold arranged between buoy and swivel.

EFFECT: improved operation, simplified design.

7 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to platforms for underwater oil extraction in zones of extreme sea and weather conditions. Platform 10 comprises a detachable anchoring system 1, 2, 3 to anchor lines 13 at sea bed and connection pipes 14 thereat. Anchoring system comprises mooring buoy 1 for anchor lines and pipelines of connection with sea bed. Note here that said buoy is a circular element. Turntable 2 extends inside cavity 4 crossing the floating platform hull over its entire height. Said mooring buoy is secured at turntable 2 under platform hull. Turntable 2 comprises tight external structure 2b with bottom 2c tightly connected with lower end of external structure 2b. Tubular external structure 2b incorporates internal structure 2a jointed with deck level with its top end 2a1. Internal structure and tubular external structure interact, on one side, with one lower rolling bearing or slider bearing to allow rotation of internal structure without that of external structure when the platform is driven around cavity vertical axis ZZ' and tight tubular outer structure. Lower rolling or slider bearing 51, 52 is located above water surface inside tight external structure.

EFFECT: simplified and reliable design, improved servicing conditions of rolling bearings.

10 cl, 8 dwg

FIELD: transport.

SUBSTANCE: floating helicopter take-off, landing and mooring complex has pontoon hull with top deck and helideck with railing and stairway. Top deck accommodates superstructure with helideck arranged on its top. Anchoring means represent at least three mooring anchors, primarily, stationary mooring bitts mounted on water area bottom and arranged along mooring equipment. Links are pivoted to aforesaid mooring bitts to couple with floating complex hull, the pivots having at least two degrees of freedom. Links of the extreme bitts and center bitts are pivoted together, the pivot having degree of freedom in horizontal plane to form triangular frame. Frame links and third independent link are articulated with mooring bitts via pivots allowing two degrees of freedom in horizontal and vertical planes around the axis parallel to complex hull. Hull upper deck accommodates devices intended for docking low and average deadweight ships, appliances for towing mooring complex and control station for helicopter take-off and landing ships mooring.

EFFECT: higher survivability.

13 cl, 4 dwg

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