Offshore floating platform

FIELD: oil and gas industry.

SUBSTANCE: invention is related to facilities of the continental shelf development. An offshore floating platform contains an undersea displacement module, a support subsea module with rigid support columns and binders, and straining ties fixed at seabed anchors. The support columns and binders can be detached from the undersea module in order to escape quickly from an ice-hazardous area and to return back to the abandoned place. The subsea module is made of individual sealed pontoons interconnected by rigid ties capable of limiting relative motion. The support columns of the subsea module are equipped with mechanisms for connection to pontoons of the undersea module and for interconnection of the modules.

EFFECT: improved reliability of the modules coupling/decoupling, simplified ballasting process.

6 cl, 5 dwg

 

The invention relates to the development of the continental shelf and with the greatest effect can be applied to deep-water platforms with tension supports.

Famous sea floating production platform (see U.S. patent No. 5439321, IPC8E02B 17/00, 1993), containing a floating semi-submersible module with equipment for production of hydrocarbons, in the operating mode moored to a small platform with wellheads, which has a tension connection, mounted on the bottom anchors, while the upper deck mentioned mining platform is constantly above the surface.

The shortcoming of the specified mining platform is that it cannot be used in ice conditions, so as not protected from the effects of a moving ice field.

Also known offshore floating production platform (see RF patent №2124455, IPC8B63B 35/44; E02B 17/00, 1995), taken as the prototype of the claimed invention, containing underwater wodoslawsky module supporting surface module through a rigid supporting columns with the connecting elements, and the tension ties, mounted on the bottom anchors, and support columns, with the connecting elements are made detachable from the underwater module for quick care platform of dangerous ice conditions in the area and provide the possible return to the abandoned place.

The disadvantage of this known offshore floating platform prototype is a significant intensity and displacement underwater module, as well as the complexity of the design and process of the production platform to the point and removing it from the point, because of the need for ballasting the underwater module for maintaining tension in relationships and retaining surface of the module above the surface.

The technical result of the claimed invention is the reduction of metal consumption while increasing the reliability of the docking and undocking of modules and simplifying the process of ballasting.

This technical result is achieved in the offshore floating platform containing underwater wodoslawsky module supporting surface module through a rigid supporting columns with the connecting elements, and the tension ties, mounted on the bottom anchors, and support columns, with the connecting elements are made detachable from the underwater module for quick care platform of dangerous ice conditions in the area and ensure a return to the abandoned place, the fact that the underwater module is made from a separate pressurized pontoons interconnected by rigid links, with the possibility of limited mutual displacements, these columns of the surface module is equipped with mechanisms is soedineniya with underwater pontoons module for fixing the mentioned modules together.

This technical result is achieved by the fact that the said rigid links interconnected by an intermediate compensator and the fact that the mentioned intermediate compensator is made of a round shape and made of elastic material.

This technical result is also achieved by the fact that the said rigid connection is made curved to increase their flexibility and ease of movement of the pontoons.

Also this technical result is achieved in that on the upper deck of the pontoons underwater module mounted catchers, and the bottom surface of the module is made deeper, adequate in size and shape of said pilot pin; and the fact that the above mentioned mechanisms of displacement connection modules made bayonet.

Declare offshore floating platform represented in the drawings, where:

figure 1 is a - type platform side before you dive underwater pontoons module;

figure 2 is a view of a figure 1 (a connection node before you dive underwater pontoons module);

figure 3 - type platform side in the working position (after connecting to the underwater pontoons module);

figure 4 is a view In figure 3 (the connection node in the working position);

figure 5 - view From figure 4.

Declare offshore floating platform includes a surface module 1 on the hard reference to Hannah 2 with the connecting elements (pontoons) 3 and the underwater module, consisting of pontoons 4 with catching 5, connected by rigid links 6 through the compensator 7. Underwater module is equipped with a tension ties 8, mounted on the bottom anchor 9. The bottom surface of the module 1 has recesses 10 for interfacing with catching 5.

In each of the rigid support columns 2 surface module 1 is mounted a bayonet mechanism connection with underwater pontoons module 4, consisting of a hydraulic cylinder 11, the coupling rod 12, the rotation mechanism 13, the locking mechanism 14 and cross members 15. The connecting rod 12 is located in the guide tube 16, the space between the thrust 12 and the guide tube 16 is filled with a rubber seal 17.

In the pontoons 4 underwater module provides cross-shaped cavity 18 for the passage of the spider 15 in the recess 19, as well as cross-shaped grooves 20 for fixing the cross 15.

Initially on the point-based offshore floating platforms are installed at the specified depth pontoons 4, fixed to a bottom anchor 9 using vertical tension ties 8.

Surface module 1 using the positioning system focuses on the pontoons 4 and taking the ballast begins to sink so that the pilot pin 5 entered into the recesses 10, made in the pontoons surface 3 of the module 1. Landing accuracy is provided by the compensator 7, the deformation of which compensates the difference between the stage the Cove sizes between catching 5, mounted on the pontoons 4 subsea module and the counter-recesses 10 surface of the module 1.

After complete immersion of the surface of the module 1 on the pontoons 4 is required to connect the modules. This operation is performed by bayonet connection mechanism that is installed in each of the supporting columns 2 surface module 1.

Due to the extension rod of the hydraulic cylinder 11 of the connecting rod 12 of the crossbar 15 down, d-pad 15 comes in a cruciform cavity 18 of the pontoon 4 and passing through the cavity, is located in the recess 19. Further, due to the rotation of the rotation mechanism 13, the cross-piece 15 is deployed at an angle of 45°. The retraction of the rod of the hydraulic cylinder 11, the reverse movement rises the cross-piece 15, which is cross-shaped groove 20, is made in the inner part of the pontoon 4. Then with a wedge locking mechanism 14 is fixed with the connecting rod 12, thereby rigidly connecting with the body surface of the module 1. Then by blowing ballast tanks (not shown) surface of the module 1, trying to reach, by means of the coupling rod 12 and crosses 15 lifts pontoon 4, and due to this, you create a desired tension in the vertical tension ties 8. Due to strained state of limited vertical and horizontal movement of the platform when the excitement and action of the wind.

Work devices fastening surface of the module 1 to the pontoons 4 subsea module is performed synchronously. To ensure that operations on consolidation is a system of underwater surveillance (not shown).

The claimed invention allows to reduce the intensity of the platform and to simplify the processes of emergency care platform with a point and its subsequent return and installation.

1. Offshore floating platform containing underwater wodoslawsky module supporting surface module through a rigid supporting columns with the connecting elements, and the tension ties, mounted on the bottom anchors, and support columns, with the connecting elements are made detachable from the underwater module for quick care platform of dangerous ice conditions in the area and ensure a return to the abandoned place, characterized in that the subsea module is made from a separate pressurized pontoons interconnected by rigid links, with the possibility of limited mutual displacements, these columns of the surface module is equipped with mechanisms in connection with underwater pontoons module for fixing the above-mentioned modules between themselves.

2. Offshore floating platform according to claim 1, characterized in that the said rigid links connected to each other through the m intermediate expansion joint.

3. Offshore floating platform according to claim 2, characterized in that the said intermediate expansion joint is made of a circular form.

4. Offshore floating platform according to claim 1, characterized in that the said rigid connection is made curved to increase their flexibility and ease of movement of the pontoons.

5. Offshore floating platform according to claim 1, characterized in that on the upper deck of the pontoons underwater module mounted catchers, and the bottom surface of the module is made deeper, adequate in size and shape of said catching.

6. Offshore floating platform according to claim 1, characterized in that the said connection mechanism displacement modules made bayonet.



 

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