Offshore platform to support slobodskaya installations

 

(57) Abstract:

The invention is intended for use in the field of hydraulic structures erected in the waters of the seas, in particular, relates to offshore platforms. Offshore platform designed to support Slobodskaya drilling or production rigs and marine bases used for exploration and production of oil and gas in the marine environment, made in the form of the ground, with three or more towers or columns. Columns directly support rack Slobodskaya drilling or production installation. This design platform can be used to maintain the marine base, which, in turn, supports drilling guides columns and flooring, module, or another design of the platform, which is used to maintain the oil or gas production or process equipment of the power plant. It may be used to maintain Slobodskaya drilling or operating installation and marine bases. This offshore platform can be used in different areas of shallow wells without major modifications to bring in soo comparison with other types of offshore platforms. 7 C.p. f-crystals, 9 Il.

The invention relates to an offshore platform, which can give the possibility to use self-raising installation, such as oil or gas drilling or production installation in water depths that are beyond the capabilities of the original design simplymaya installation.

In accordance with the present invention provides a marine platform, comprising:

the subgrade intended for placement at the drilling on the seabed below the surface of the sea;

at least one device for coupling with the sea floor, designed for fastening to substrate in the seabed in place drilling;

at least three columns having lower ends connected to ground base, and the upper ends passing over the ground base to the location below the surface of the sea;

rack self-raising install, passing vertically upwards from the upper end of each column, and each rack installation attached to the upper end of the corresponding column and goes to the location above the surface of the sea; and

slobodnima use in other areas of drilling, with different water depths.

To minimize the cost of development of oil fields was developed offshore platform in accordance with various embodiments of the present invention can be used to empower Slobodskaya drilling or production installation to allow it to operate at water depths that are beyond the capabilities of the original design. This enables efficient selection of ready-made self-raising unit, depending on market conditions and availability.

Offshore platform may be gravity base, which is supported by ground bases, based directly on the seabed. Ground base may contain steel frame farm or frame structure supported by piles, suction support legs or directly supporting foundations on natural basis. Other types of offshore platforms can provide storage in tanks. These tanks can be used for fusion of this design to the installation site. If the tank is not provided, the marine platform is transported to the installation site on the about crane or any other means.

The preferred design is specifically intended to support Slobodskaya plants of a certain size and shape, but may prevent a number of dimensional deviations from these parameters, a particular class of self-raising installation and the resulting loads that may occur. Used for drilling guides columns supported column, steel farm or skeleton tower, or the Central caisson supply, which is on the sea platform and supports the marine base and the module, flooring or building used for oil or gas production equipment and communications. When Slobodskaya installation removed, equipment and utilities used for oil and gas production, control and import of oil, gas, chemicals, electricity, or other consumption of materials and energy with other marine bases or from the shore and to export oil and gas to other places and for other applications.

After installation of offshore platforms on the seabed, it is possible to install Slobodskaya installation. Then as Slobodskaya installation has completed its work, for that is the TEP development or operation of oil or gas field.

Thus, variants of the embodiment of the present invention provide an offshore platform, which takes the form of the ground, which is placed on the seabed and support towers or columns, which are held to the level of height which is below the surface of the water, and that, in turn, support rack Slobodskaya drilling or production installation. It is possible to install the rack self-raising installation on the top of these columns or towers. If Slobodskaya installation is no longer required, it can involve hours and to swim freely from offshore platforms. The subgrade can support column or tower, which supports the drill guides of the column and the structure that supports the module, flooring or building which is used for placement of oil or gas production equipment and communications. Design that supports the guides of the column, can also support module, flooring or building. The subgrade may be gravity base or steel frame or farm, which has sufficient stiffness in directions to provide a fastening Coleraine oil. These tanks can be used to provide buoyancy to allow offshore platform to be transported to the installation site and in a controlled way omitted on the seabed.

Hereinafter the present invention will be described by example with reference to the accompanying drawings, in which similar parts are indicated similar reference numbers, where:

Fig. 1 is an isometric image of an offshore platform, which has the subgrade provided with columns or towers to support racks Slobodskaya drilling or operating the installation;

Fig. 2 is a front projection offshore platform shown in Fig. 1;

Fig. 3 is a frontal projection of the other direction offshore platform shown in Fig. 1;

Fig. 4 is an isometric image of another offshore platform, which has the subgrade provided with columns or towers to support racks Slobodskaya drilling or operating the installation;

Fig. 5 is a front projection offshore platform shown in Fig. 4;

Fig. 6 is a frontal projection of the other direction offshore platform shown in Fig. 4;

Fig. 7 is an isometric inami to maintain racks Slobodskaya drilling or operating the installation;

Fig. 8 is a front projection offshore platform shown in Fig. 7;

Fig. 9 is a frontal projection of the other direction offshore platform shown in Fig. 7.

As you can see from the drawings, the present invention may have multiple embodiments. Between these structures, there are certain similarities that are associated with the basic elements of the present invention. The subgrade can support column or tower to support drilling guide columns and naval base for the module, flooring or building. In Fig.1 the subgrade as shown gravitational Foundation with the internal storage tank. In Fig. 4 the subgrade is shown as a steel frame, supported on piles or suction anchor legs. The subgrade, as shown in Fig. 7, can support column or tower to support drilling guide columns and naval base for the module, flooring or building. This is the subgrade is shown as a steel frame, supported on piles or suction anchor legs and tanks that can be placed in a position corresponding to the technological requirements, or any d the th and buoyancy during transportation and installation of offshore platforms.

Thus, each variant of the embodiment of the present invention has the subgrade, which is placed on the seabed and transmits loads to the ground direct support or through piles or through the Foundation on the natural basis or through suction support legs or using combinations of these methods. The subgrade may be concrete or steel structures. The subgrade may be provided with tanks for storing petroleum products, water or other liquids or a combination of these liquids. These tanks can be used as floating storage tanks, enabling offshore platform having sufficient buoyancy to float to the installation site, and to be installed on the seabed by means of an adjustable filling with water. If the tank is not provided, offshore platform can be transported to the installation site on a cargo barge and installed the launching of a cargo barge or floating crane or a combination of these methods.

Three or more vertical or inclined column or tower support rack Slobodskaya drilling or production installation. These columns or towers installed on the th, to allow Slobodskaya installation to be able to raise themselves up to a working height above sea level. Columns or towers have a bearing surface that corresponds to the transfer of loads from the racks self-raising installation, and the guide mechanism to ensure proper alignment of the mounting reference surface. Can be provided by the transducers, sonar or some other sensor or some other mechanisms, for example, stretched wire, through which Slobodskaya the installation may be located relative to the marine base and module, flooring or building, so that the rack self-raising plants can be placed on the support pillars or towers and lowered on the marine platform or properly aligned. To ensure the fastening of the base of the uprights self-raising installation, there may be a locking mechanism.

In another variant embodiment of the present invention, vertical or inclined column or tower runs from the ground to a level below the water surface, and supports the marine base. Marine base consists of a steel reinforced frame or tubular caisson and module, advertise effects waves, that is, above the crest of the wave. Column or tower is a reinforced frame or tubular caisson, which provides support and acts as a guide for drilling the guide columns. The upper part of the column or tower provided with a mechanism for fastening the marine base. Sea base can be installed and removed when the need arises.

In Fig. 1 shows Slobodskaya drilling or operating the installation of 11, which is supported on columns or towers 21, which, in turn, supported by ground base 31. On the top of each column or tower 21 has a support surface 22, which is intended to maintain the racks 12 self-raising plant. The upper part of the column or tower in the position indicated by the reference number 23, is provided with a locking mechanism 24 to ensure that the rack 12 is undoubtedly connected with the column or tower 21, and the guide 25 for guiding the rack 12 in the correct position, located in the center of the column or tower 21. There may be established marine base 41 that contains the module, flooring or building (collectively, the valve 42 is supported on the column, the caisson or the tower 43, which practicalist to accommodate oil and gas equipment and appliances or other equipment and communications depending on the application of the offshore platform. Column or tower 43 is provided, the bearing surface 44, designed to maintain the marine base 41, and the guide 45 and pin 46, to allow the marine base to be installed or deleted after installation of the offshore platform. The subgrade 31 supported on the ground by means of piles, foundations on natural basis, intake support legs or base plate 32 (collectively named in this work devices for coupling with the seabed). The subgrade 31 may consist of a tank 33, which can ensure the storage of oil or other liquid product. The tank 33 can be used as floating storage tanks during the installation process.

In Fig. 2 shows a frontal projection of the same offshore platform shown in Fig. 1. In Fig. 3 shows another frontal projection of the same offshore platform shown in Fig. 1, but at an angle of ninety degrees relative to the projection shown in Fig. 2.

In Fig. 4, where similar reference numbers are used to designate functionally similar parts are given Slobodskaya drilling or production installation 11, which supports the iej 31. On the top of the column or tower 21 has a support surface 22, which is intended to maintain the racks 12 self-raising plant. The upper part 23 of the column or tower 21 is provided with a locking mechanism 24 to ensure that the rack 12 is undoubtedly connected with the column or tower 21, and the guide 25, which is intended for the direction of the rack 12 in the correct position, located in the center of the column or tower 21. There may be hosted by a marine base 41 that contains the module, flooring or building 42, supported on the column, the caisson or the tower 43, which extends from the frame structure 31 to a height below the surface of the water. Module, flooring or building 42 is used for placement of oil and gas equipment and appliances or other equipment or communications depending on the application of the offshore platform. Column or tower 43 is provided with a support surface 44, which is designed to support the marine base 41, with the guides 45 and pin 46, to allow the marine base to be installed or deleted after installation of the offshore platform. The frame structure 31 is supported by the ground through piles of foundations on e is latform, which is shown in Fig. 4, and Fig. 6 is a front projection of the same offshore platform shown in Fig. 4, but rotated ninety degrees relative to the projection shown in Fig. 5.

In Fig. 7, where similar reference numbers are used to designate functionally similar parts shown Slobodskaya drilling or operating the installation of 11, which is supported on the column or tower 21 which are supported three-dimensional farm or frame frame structure 31. On the top of the column or tower 21 has a support surface 22, which is intended to maintain the racks 12 self-raising plant. The upper part 23 of the column or tower 21 provided with a locking mechanism 24 to ensure that the rack 12 is undoubtedly connected with the column or tower 21, and the guide 25, which is intended for the direction of the rack 12 in the correct position, located in the center of the column or tower 21. There may be hosted by a marine base 41 that contains the module, flooring or building 42, supported on a column or tower 43, which extends from the frame structure 31 to a height that is below the surface of the water. Module, flooring or building 42 used is of unicati depending on the application of the offshore platform. Column or tower 43 is provided with a support surface 44, which is designed to support the marine base 41, with the guides 45 and pin 46, to allow the marine base to be installed go to the remote after installation of the offshore platform. The frame structure 31 is supported by the ground through piles of foundations on natural basis or suction support legs 32. The frame structure 31 may be provided with storage tanks 33, which can be used for the storage of oil or other liquid product. The tank 33 can be used as floating storage tanks during the installation process.

Fig. 8 is a frontal projection of the same offshore platform shown in Fig. 7, and Fig. 9 is a front projection of the same offshore platform shown in Fig. 7, but rotated ninety degrees relative to the projection shown in Fig. 8.

1. Offshore platform containing base installed below sea level on the seabed, at least one device for attaching the base to the seabed, at least three columns having lower ends connected to the base, and the upper ends passing Nodaway vertically upward from the upper ends of the columns, each hour passes to the location above the surface of the sea, and Slobodskaya installation, characterized in that Slobodskaya the installation is removable connected to supports installation via a mechanism Slobodskaya installation to be located at different levels above the column to the rack, platform further comprises a tower, connected to the base and passing above the sea surface, while the tower is installed valves designed for seabed mining, and Slobodskaya installation connected to the tower or valve for at least temporary support towers or fittings.

2. Platform under item 1, characterized in that it further comprises pipelines, risers and communication that goes from the valve to the seabed and placed in the caisson, located in the tower and protecting pipelines, risers and communication from the force of the sea.

3. Platform under item 1, characterized in that the valve is installed on the tower removable.

4. Platform according to any one of paragraphs.1 to 3, characterized in that the valve contains a module, flooring or building for well drilling or production of oil, gas or minerals or PfP, the device for attachment to the seabed made in the form of piles, foundations on natural basis, intake support legs or GBS.

6. Platform according to any one of paragraphs.1 to 5, characterized in that it further comprises a locking mechanism located on the top of each column and is designed to connect the rack to the column.

7. Platform on p. 6, characterized in that the upper part of each column is made with a support surface intended to support the corresponding rack.

8. Platform according to any one of p. 6 or 7, characterized in that it further comprises a guide at the top of each column, intended for the direction of each rack engages with a corresponding column.

 

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