RU2530921C1 - Sea gravity platform - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: proposed platform comprises hull with main deck with crew quarters, process and general ship equipment, device to discharge oil products to tankers, copter deck and riser shaft at platform centre. Crew quarters have closed shape and is arranged equidistant to main deck outer outline. Process equipment is located so that it is limited by crew quarter inner fire- and explosion-proof wall. Crew and working quarters are arranged along crew quarters outer wall. Platform is equipped with canopy-shape coating located above the main deck and connected crew quarters and composed by separated trapezoid-shape flaps aligned with platform centre. Canopy base flaps rests on crew quarters inner wall. Riser pit height equals that of canopy top parts and terminates in bearing platform jointed by horizontal hinged with every flap of said canopy.

EFFECT: perfected performances by reducing the platform's gravity center, uniform weight distribution on the body of the platform from the residential unit and to protect the process equipment from the weather wave and wind effects.

5 cl, 4 dwg

Description

The invention relates to the field of shipbuilding, and more specifically to offshore technological platforms for various purposes, and can be used to create floating, submersible and stationary offshore platforms for the development of shelf deposits and relates to the improvement of platform operational characteristics by reducing the center of gravity, uniform distribution of weight load on platform body from a residential module and protection of technological equipment from wind waves.

Known ice-resistant floating platform Kulluk. CDU project (Conical Drilling Unit), see P. P. Kulmach “Offshore facilities for the development of the polar shelf”, page 277 - prototype. The specified platform contains a round steel plan in the plan, separated by radial and axial bulkheads, combining cylindrical and conical sections of the outer skin along the height of the platform. The platform is equipped with a central shaft connecting the bottom with the upper deck to perform technological functions. Technological and general ship equipment, as well as a residential module with a helipad, are installed on the upper deck.

This platform has a simple and rational (round in plan) hull shape, which is successfully used on platforms designed for operation in ice conditions in the Arctic zone.

However, this platform has inherent disadvantages. The disadvantage of the platform design is the high height of the residential module, which has a multi-tiered layout. Such an arrangement leads to an increase in the center of gravity of the structure, reduces its stability, requires the use of additional ballast to level the platform on the water, and causes difficulties when placing the living rooms themselves as part of the residential module, since the area of the outer wall of the residential module oriented to the external safe side of the platform with the possibility of the organization of natural lighting in residential premises is not large enough. Another disadvantage is the placement of technological and general ship equipment on the upper deck without a general shelter. When operating the platform in arctic conditions, this causes additional energy costs for heating equipment and deck structures in order to prevent icing.

These shortcomings significantly worsen the operational characteristics of the platform.

The objective of the invention is to eliminate the above disadvantages, namely improving the operational characteristics of the platform in terms of increasing its stability by reducing the center of gravity and even distribution of the load on the platform from the living module, as well as in protecting deck structures, technological and general ship equipment from wind and atmospheric influences when operating in arctic conditions.

This is achieved by the fact that in the well-known technological platform that contains a round hull with the main deck, a residential module installed on the main deck, technological and general ship equipment, a loading device for unloading oil products onto tankers, a helipad and a riser shaft located in the central part of the platform , according to the invention, the residential module has a closed shape and is located equidistant to the outer contour of the main deck. At the same time, the technological equipment is installed so that it is limited by the inner wall of the residential module, made fire and explosion-proof, and residential and office space in the residential module are located along the outer wall of the residential module. The platform is equipped with a drop-down controlled coating located above the main deck and connected to the living module of the platform in the form of a dome from individual trapezium-shaped flaps, mounted coaxially with the center of the platform, with the base of the dome being freely supported by the inner wall of the residential module. At the same time, the risers shaft is brought up to the top of the dome in height and is completed by a supporting platform, which is connected by a horizontal hinge to each leaf of the dome.

In addition, each wing of the drop-down controlled cover of the main deck along the perimeter is equipped with elastic seals with the ability to seal the dome in the closed position, as well as a lever installed with an angular deviation upward from the plane of the wing.

In this case, the disclosed controlled cover of the main deck is equipped with a lifting device made in the form of a telescopic rack rigidly fixed to the supporting platform in the center of the platform with an integrated power cylinder, the upper movable part of the telescopic rack being connected to the leaf levers via ropes through a block system with the possibility of uncoupling the joints.

Along with this, a shipping device for unloading oil products onto tankers is installed above the housing module, supported by a casing with fire protection, made in the form of a portal and fixed to the main deck from the inside and outside of the housing module.

In addition, the helipad is located above the residential module with supports on the outer and inner sides of the residential module in the form of portals installed on the main deck.

The implementation of a closed-type residential module and an equidistant outer contour of the main deck with the installation of technological equipment so that it is limited by the inner wall of the residential module facing the center of the platform, made fireproof and explosion-proof, ensures by increasing the platform's center of gravity and uniform distribution of the load on the platform platform stability.

The location of residential and office space in the residential module along the outer wall of the residential module facing the water area provides comfortable conditions for the personnel and their safety.

The equipment of the platform located above the main deck and connected to the living module of the platform with a drop-down controlled coating in the form of a dome from individual trapezium-shaped flaps installed coaxially with the center of the platform allows isolating the equipment on the upper deck from the external environment with the prevention of flooding, splashing, and reducing energy costs for heating of technological equipment and heating of structures in order to prevent icing.

Leaning of the dome at the base with the sashes on the inner wall of the residential, and in the upper part - at the riser shaft, brought to the upper part of the dome, through the supporting platform, which is connected by a flat hinge to each leaf of the dome, makes it possible to open the dome by lifting the sash.

The supply of each leaf of the disclosed controlled cover of the main deck along the perimeter with elastic seals, with the possibility of sealing the dome in the closed position, allows complete isolation, if necessary, of the specified space from the external environment.

The supply of the controlled deck cover of the main deck with a lifting device made in the form of a telescopic stand rigidly fixed to the supporting platform in the center of the platform with an integrated power cylinder, as well as a lever mounted on each wing with an angular deviation upward from its plane, while the upper movable part telescopic strut connected to the levers of the wings through ropes through a system of blocks with the possibility of separation of connections, allows you to selectively control the opening (closed cm) of each flap or flaps group if necessary ventilation internal space defined by the module and the housing dome, pressure relief or cargo operations through the open dome.

The installation of a shipping device for unloading oil products onto tankers above the housing module, supported by a fire protection enclosure, made in the form of a portal and fixed to the main deck from the inside and outside of the housing module, improves the platform’s performance by placing the cargo system inlets protected from weather space under the dome.

The installation of a helipad above the living module with supports on the outer and inner sides of the living module in the form of portals installed on the main deck improves the performance of the platform by reducing the weight of the living module by directly transferring the load from the helipad to the upper deck with full unloading of the living module.

The essence of the invention is illustrated by drawings, where figure 1 shows a longitudinal section of an offshore technological platform, figure 2 shows a schematic of the proposed marine technological platform in plan. Figure 3 is a section aa in figure 2 and figure 4 is a section bb in figure 2.

The offshore technological platform comprises a round-shaped hull 1 in plan with a ring-shaped housing module 3 concentrically mounted on the main deck 2 (FIG. 2). At the level of the main deck 2 and above, technological equipment 4 is installed in the internal space bounded by the residential module 3, a loading device 5 for unloading oil products to the tankers and a helipad 6. A riser shaft 7 is installed in the central part of the platform (Fig. 1). The platform is equipped with a drop-down controlled coating located above the main deck and connected to the living module 3 of the platform in the form of a dome 8 from individual leaves 9 in the form of trapezoid arms with levers 10 arranged in a circle symmetrically to the vertical axis of the platform (Figs. 1, 2).

The lower base of the cover (dome) 8 rests on the inner wall of the housing module 3, and the riser shaft 7 is brought up to the top of the dome 8 in height and is equipped with a support pad 11 in the upper part of the dome 8 (Fig. 1).

Sashes 9 with levers 10 of the disclosed controlled cover (dome) 8 of the main deck in the upper part are connected to the supporting platform 11 by horizontal hinges 12 with one degree of freedom (Fig. 3), and along the perimeter are equipped with an elastic seal 13 (Figs. 3 and 4).

The disclosed controlled cover (dome) 8 of the main deck 2 is equipped with a lifting device, including a telescopic stand 14 (Fig. 1) rigidly fixed to the supporting platform 11 in the center of the platform with an integrated power cylinder 15, the upper movable part 16 of which is connected to the levers 10 of the shutters 9 by ropes 17 through a system of blocks 18 with the possibility of separation of connections.

A shipping device 5 (FIGS. 1 and 2) for unloading oil products onto tankers is installed above the housing module 3 with support on a U-shaped casing 19 equipped with fire protection (not shown). The casing 19 is structurally connected with the main deck 2 (rests on the main deck) from the inner and outer sides of the living module 3 (figure 1).

Above the living module 3 there is a helipad 6 (FIGS. 1 and 2), equipped with supports from the outer and inner sides of the living module 3 in the form of portals 20 mounted on the main deck 2. Thus, the helipad 6 is connected to the living module 3, and constructively relies on the main deck 2 (figure 1).

The proposed marine technological platform works as follows.

With the wind wave effect on the proposed offshore technological platform under operating conditions by lowering its center of gravity and the ring-shaped housing module, the amplitude of inclinations during rolling decreases, which increases the stability of the platform.

When operating in conditions of negative external temperatures, the space above the upper deck 2, limited on the sides by a living module 3 and on top by a controlled coating 8 (in the closed position), is completely isolated from the external environment by means of an elastic seal 13 (FIGS. 3 and 4), installed around the perimeter of each leaf 9. A positive temperature is maintained in the indicated space. This eliminates snow drifts and icing of internal structures and equipment. Selective opening (lifting) of the shutters 9, if necessary, ventilation or cargo operations is provided by disconnecting the ropes 17 on separate shutters 9, the rise of which is not planned.

Unloading of the produced hydrocarbon feedstock to a tanker (not shown) is provided through a shipping device 5, separated from the housing module 3 by a casing 18, which performs the functions of a supporting and fire-fighting structure.

Landing, take-off and maintenance of the helicopter is provided by the helipad 6. All operational loads from the helipad, equipment and the helicopter itself are transferred to the main deck 2 directly through portals 20, bypassing residential module 3.

Claims (5)

1. The offshore technological platform, comprising a round hull with a main deck, with a residential module installed on it, technological and general ship equipment, a loading device for unloading oil products onto tankers, a helipad and riser shaft located in the central part of the platform, characterized in that the residential module has a closed shape and is located equidistantly to the outer contour of the main deck, while the technological equipment is installed so that it is limited by the inner wall logo of the module, made fireproof and explosion-proof, and the living and office premises in the residential module are located along the outer wall of the residential module, and the platform is equipped with a drop-down controlled coating located above the main deck and connected to the living module of the platform in the form of a dome made of individual trapezium-shaped wings, installed coaxial with the center of the platform, while the dome at the base of the sash rests on the inner wall of the residential module, and the riser shaft is heightened to the top of the dome and completed supporting platform, which is connected by a horizontal hinge to each leaf of the dome. 2. The offshore technological platform according to claim 1, characterized in that each wing of the drop-down controlled cover of the main deck along the perimeter is equipped with elastic seals with the ability to seal the dome in the closed position, as well as a lever installed with an angular deviation upward from the plane of the wing. 3. The offshore technological platform according to any one of claims 1 and 2, characterized in that the disclosed controlled cover of the main deck is equipped with a lifting device made in the form of a telescopic rack rigidly fixed to the supporting platform in the center of the platform with an integrated power cylinder, the upper movable part of the telescopic the racks are connected to the levers of the leaves through ropes through a system of blocks with the possibility of separation of connections. 4. The offshore technological platform according to claim 1, characterized in that the unloading device for unloading oil products onto tankers is mounted above the housing module with support on a casing with fire protection, made in the form of a portal and fixed to the main deck from the inside and outside of the housing module. 5. The offshore technological platform according to claim 1, characterized in that the helipad is installed above the residential module with supports on the outer and inner sides of the residential module in the form of portals installed on the main deck.

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