An integrated floating and installation platform for offshore oil production platforms

Abstract

The application discloses a kind of offshore oil production platform integral float and installation platform, including U-shaped ship main body, in the rear of U-shaped ship main body form U-shaped groove, U-shaped ship main body upper surface is equipped with ship deck, ship deck is in the three edges of U-shaped groove forms cantilever, and rubber layer is equipped at the bottom of ship deck cantilever portion;Hydraulic cylinder body is equipped at each side wall of U-shaped groove of U-shaped ship main body, and hydraulic cylinder body is connected with push rod;Portal crane system is equipped above ship deck, and the lower portion of portal crane system is connected with oil production platform.The application has high safety, full functionality, and space utilization is sufficient, and the integral float and installation of oil production platform can be realized, and the integral lifting and moving reuse after oil production can also be realized.

Description

Technical Field

[0001] This invention relates to the field of marine engineering equipment and offshore oil and gas development technology, and in particular to an integral floating and installation platform for offshore oil production platforms. Background Technology

[0002] Offshore oil platforms mainly consist of a substructure (such as jackets and legs), superstructure (including drilling and production equipment, living quarters, and power systems), and mooring or positioning systems. The offshore installation process mainly includes: (1) installing the substructure; (2) assembling the superstructure at the wharf; (3) transporting it to the target sea area by transport vessel; and (4) connecting the superstructure to the substructure using a large floating crane or a floating method, thus completing the installation. Currently, the following shortcomings still exist in the transportation and installation of offshore oil platforms: (1) high installation risk; (2) structural safety and aging; (3) delayed emergency response; and (4) environmental protection and disposal challenges.

[0003] The one-step installation technology for cylindrical foundations and wind turbine units represents a significant breakthrough in the offshore wind power sector in recent years. Its key feature lies in the pre-assembly of the wind turbine, tower, and cylindrical foundation into a unified "turbine-tower-foundation" structure at a land-based assembly base. This integrated structure is then transported to the target sea area using a specialized integrated installation vessel, where it is precisely lowered and installed using negative pressure sinking technology. This technology offers significant advantages, including greatly improved construction efficiency, significantly reduced project costs, and effectively reduced risks associated with offshore operations.

[0004] my country's marginal oilfields are rich in resources, but they generally face bottlenecks such as small reserves, remote locations, and low economic efficiency in development. There is an urgent need for a low-cost, fast-paced, and reusable oil production platform solution. This application proposes an integral floating and installation platform for offshore oil production platforms, focusing on the application of cylindrical foundations in marginal oilfield production platforms. The aim is to achieve integral floating and installation of the oil production platform, and to enable its reuse through integral lifting and relocation after oil production. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the present invention provides an integral floating and installation platform for offshore oil production platforms.

[0006] The present invention is achieved by the following technical solution.

[0007] An integral floating and installation platform for offshore oil production includes a U-shaped hull, with a U-shaped trough formed at the rear of the hull. A ship deck is provided on the upper surface of the hull, with the ship deck cantilevered on three sides of the U-shaped trough. A rubber layer is provided at the bottom of the cantilevered portion of the ship deck. A hydraulic cylinder is provided on each side wall of the U-shaped trough of the hull, and the hydraulic cylinder is connected to a thrust rod. A gantry crane system is provided above the ship deck, and the oil production platform is connected below the gantry crane system.

[0008] Furthermore, the U-shaped groove has a right-angled opening, with its two side walls parallel to each other and perpendicular to the bottom.

[0009] Furthermore, the cantilever distance is 5-8m.

[0010] Furthermore, the thickness of the rubber layer is 10-20cm.

[0011] Furthermore, the gantry crane system includes a gantry crane support truss, with rollers at the bottom of the gantry crane support truss, the rollers being slidably mounted in a track on the ship's deck; a gantry crane crossbeam is connected to the top of the gantry crane support truss, and a crane is mounted on the gantry crane crossbeam.

[0012] Furthermore, the oil production platform includes an upper component, the lower part of which is connected to a lower foundation structure. The lower foundation structure consists of a transition section and a cylindrical foundation, with the cylindrical foundation placed within the U-shaped groove of the U-shaped vessel body.

[0013] Furthermore, an anchor winch is installed on each of the two sides of the bow and the two sides of the stern of the U-shaped vessel.

[0014] This application has the following beneficial effects.

[0015] (1) High safety: Three thrust rods provide radial constraint force, the deck provides axial constraint force, and the gantry crane on the top of the oil production platform can provide lifting force. The lifting point is set at the top of the structure, which significantly improves the risk resistance of the oil production platform during the overall transportation process.

[0016] (2) Full functionality: The platform in this application serves as both a transportation platform and an installation platform for the oil production platform. It enables the integrated installation of the upper components and lower foundation of the oil production platform at the installation site, greatly shortening the installation time in the designated sea area and reducing installation risks and costs. At the same time, the platform can also be used as a removal platform for the oil production platform.

[0017] (3) Full utilization of space: The horizontal hydraulic fastening system is hidden inside the hull and does not occupy the deck space. It can maximize the towing and loading efficiency. While towing the base, it can load the work platform and construction platform directly to the designated sea area, thereby improving the towing efficiency. Attached Figure Description

[0018] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the structure of the U-shaped boat body of the present invention; Figure 4 This is a schematic diagram of the horizontal hydraulic fastening system of the present invention.

[0019] In the diagram: 1. U-shaped hull; 2. Ship deck; 3. Anchor winch; 4. Hydraulic cylinder; 5. Thrust rod; 6. Rubber layer; 7. Roller; 8. Gantry crane support truss; 9. Gantry crane beam; 10. Track; 11. Crane; 12. Superstructure; 13. Transition section; 14. Tubular foundation. Detailed Implementation

[0020] The present patent application will be further described below with reference to the embodiments. Unless otherwise specified, the materials used in the preparation process in the following embodiments have not undergone further processing and have been commercially available.

[0021] like Figure 1-4 As shown, an integrated floating and installation platform for offshore oil production platforms includes a U-shaped vessel, a horizontal hydraulic fastening system, a gantry crane system, and an oil production platform.

[0022] The U-shaped vessel includes a U-shaped hull 1, a ship deck 2, an anchor winch 3, and a rubber layer 6. The U-shaped hull 1 is a steel structure with internal compartments. A U-shaped groove is formed in the center of the rear of the U-shaped hull 1, with a right-angled opening at the groove's opening. The side walls are parallel to each other and perpendicular to the bottom. The ship deck 2 cantileveres from three sides of the U-shaped groove in the U-shaped hull 1, with a cantilever distance of 5-8m. A rubber layer 6, 10-20cm thick, is installed at the bottom of the cantilevered portion of the ship deck 2. The anchor winches 3 are installed on the ship deck 2, with one on each side of the bow and stern, for anchoring and positioning the vessel.

[0023] The horizontal hydraulic fastening system includes a hydraulic cylinder 4 and a thrust rod 5. The hydraulic cylinder 4 is arranged on the side wall of the U-shaped groove of the U-shaped vessel body 1, with one cylinder on each of the three side walls. The thrust rod 5 is mounted on the hydraulic cylinder 4 and is telescopic. During the overall transportation of the oil production platform, the thrust rod 5 can provide radial force to the top position of the cylindrical foundation 14, thereby restricting the horizontal movement of the cylindrical foundation 14.

[0024] The gantry crane system includes rollers 7, a gantry crane support truss 8, a gantry crane crossbeam 9, rails 10, and a crane 11. Rollers 7 are installed at the bottom of the gantry crane support truss 8, and the rollers 7 move on the rails 10. The rails 10 are arranged on the ship's deck 2, with two rails 10 on each side of the ship's deck 2. The gantry crane crossbeam 9 is fixed to the gantry crane support truss 8, and the crane 11 is mounted on the gantry crane crossbeam 9.

[0025] The oil production platform comprises an upper component 12 and a lower foundation structure. The lower foundation structure includes a transition section 13 and a cylindrical foundation 14. The top of the upper component 12 is connected to a crane 11. The upper component 12 is the upper block of the offshore oil production platform (including drilling and oil production equipment, living quarters, and power systems, etc.), and is located on top of the transition section 13. The upper component 12, the transition section 13, and the cylindrical foundation 14 are connected as a whole. The transition section 13 is a hollow thin-walled concrete structure; the cylindrical foundation 14 is a cylindrical structure with an opening facing downwards and a closed top, with a concrete top and steel sidewalls.

[0026] The construction steps of this invention are as follows: 1. At the dock, the lower foundation structure is floated to the U-shaped channel of the U-shaped vessel body 1 by air flotation. After being floated to the designated position, air is injected into the cylindrical foundation 14 to make the cylindrical foundation 14 float. Its top is squeezed against the rubber layer 6 below the cantilever part of the ship deck 2. The total compression load is controlled at 300-500t.

[0027] 2. Extend the push rods 5, and press the three push rods 5 against the top of the cylindrical foundation 14 until they are firmly in place.

[0028] 3. The upper component 12 is assembled on the forward half of the ship deck 2. After assembly, it is hoisted to the top of the transition section 13 by a gantry crane, connecting the two into a whole. After connection, the load on the crane 11 is released and the hoisting rope is tightened; at the same time, air is inflated into the cylindrical foundation 14 to ensure that the top of the cylindrical foundation 14 is compressed against the rubber layer 6 below the cantilevered part of the ship deck 2, and the total compression load is controlled at 300-500t.

[0029] 4. Transport the oil production platform as a whole to the designated sea area and anchor it for positioning.

[0030] 5. Under permissible sea conditions, the cylindrical foundation 14 is degassed to control the overall weight of the oil production platform to be 100-200t greater than the buoyancy. At this time, the crane 11 bears the load. By slowly laying cables and degaussing the inside of the cylindrical foundation 14, the oil production platform is gradually lowered until the cylindrical foundation 14 is inserted into the seabed. Then, by pumping air and water out of the inside of the cylindrical foundation 14, the cylindrical foundation 14 is further inserted into the seabed. At the same time, the crane 11 slowly lays cables until the crane 11 no longer bears the load, and the cylindrical foundation 14 is inserted to the specified depth.

[0031] 6. After the oil production platform is installed, the platform is moved away, and the project installation is completed.

[0032] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A floating and installation platform for an offshore oil production platform, comprising a U-shaped vessel body (1), characterized in that: A U-shaped trough is formed at the rear of the U-shaped vessel body (1). A ship deck (2) is provided on the upper surface of the U-shaped vessel body (1). The ship deck (2) forms cantilever on three sides of the U-shaped trough. A rubber layer (6) is provided at the bottom of the cantilever part of the ship deck (2). A hydraulic cylinder (4) is provided at each side wall of the U-shaped trough of the U-shaped vessel body (1). The hydraulic cylinder (4) is connected to the thrust rod (5). A gantry crane system is provided above the ship deck (2). The oil production platform is connected below the gantry crane system.

2. The overall floating and installation platform for offshore oil production platforms according to claim 1, characterized in that: The U-shaped groove has a right-angle opening, with its two side walls parallel to each other and perpendicular to the bottom.

3. The overall floating and installation platform for offshore oil production platforms according to claim 1, characterized in that: The cantilever distance is 5-8m.

4. The overall floating and installation platform for offshore oil production platforms according to claim 1, characterized in that: The thickness of the rubber layer (6) is 10-20cm.

5. The overall floating and installation platform for offshore oil production platforms according to claim 1, characterized in that: The gantry crane system includes a gantry crane support truss (8), with rollers (7) at the bottom of the gantry crane support truss (8), and the rollers (7) are slidably set in a track (10) on the ship deck (2); a gantry crane beam (9) is connected to the top of the gantry crane support truss (8), and a crane (11) is set on the gantry crane beam (9).

6. The overall floating and installation platform for offshore oil production platforms according to claim 1, characterized in that: The oil production platform includes an upper component (12), the lower part of which is connected to a lower foundation structure. The lower foundation structure consists of a transition section (13) and a cylindrical foundation (14), which is placed in the U-shaped groove of the U-shaped vessel body (1).

7. The overall floating and installation platform for offshore oil production platforms according to claim 1, characterized in that: An anchor winch (3) is installed on each of the two sides of the bow and the two sides of the stern of the U-shaped vessel (1).

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