JP2693332B2 - Semi-submersible production platform - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION This invention relates to a semi-submersible production platform for oil production, water injection, and oil and gas unloading.

[0002]

BACKGROUND OF THE INVENTION Semi-submersible production platforms include various equipment such as water intake, fire fighting, ventilation, air conditioning, power generation, fixing, riser pipes and the like. This type of platform integrates some of these devices, as is well known, but is unable to do so with others of similar importance.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a semi-submersible production platform which integrates all the equipment necessary for its operation.

In particular, it is an object of the present invention to better integrate process equipment to enable natural ventilation of said equipment and also for all production facilities, marine service equipment, plant service equipment, platform configurations and shells. It is to provide a semi-submersible production platform that integrates the structure.

It is also an object of the present invention to provide a semi-submersible platform using the closed ring float format, which allows the float to take on structural rigidity by reducing the deck and weakening its rigidity. .

[0006]

SUMMARY OF THE INVENTION The present invention is a semi-submersible production platform for oil production, water injection, and oil and gas unloading, with a float of rectangular cross section forming a closed rectangular ring. It is composed of four pillars having a rectangular cross section arranged at each of the four vertices of the closed rectangular ring, and an equipment support part which completely isolates process equipment, utility equipment and living equipment. A shell having a linear basic shape, a side support member and a junction of a square section, and the contact
A lateral support member for the joint and the lateral support member
A riser-receiving device which is disposed at a height of funnel, the plug
A passive fixing device to reduce the fixing of the load to Ttohomu, Engineering
A water intake system which includes a truss deck structure for natural ventilation of heat dissipation and heat dissipation equipment and an intake pipe connected to the float at its top by a flexible joint and which operates at great depth. And including a bell mouth at its lower end. A semi-submersible production platform of a preferred embodiment of the present invention comprises: a. A straight-shaped shell formed of standardized parts that facilitates its assembly in medium and small shipyards, b. The riser joints are supported at float height, which minimizes dynamic loads on the platform and problems with structure interference, thus eliminating the need for deck space to support the joints. , A riser receiving device adapted to eliminate a dangerous area for crew members and increase work safety, and c. Reduce the weight on the deck, increase the availability of space,
A conventional windlass-free passive anchoring device that utilizes gravity piles, thus enabling a reduced anchoring radius and a cleaner seabed; d. A truss-shaped deck structure for natural ventilation of the process area and a large heat dissipation facility; e. A deep water acting water intake device, eliminating the need for a conventional water cooling device; f. Fire fighting equipment integrated into utility equipment for taking in, spraying, cooling and using it for ballasts, g. Includes equipment supports that provide complete isolation of process equipment, utility equipment and dwelling equipment, and thus increase operational safety.

The present invention will be described with reference to the drawings in which the present specification is summarized.
The details will be described below.

[0008]

EXAMPLES As can be deduced from the figures, a semi-submersible production, indicated generally by the numeral 10 in FIG. 1, intended for oil production above 400 m, for water injection and for oil and gas exports. platform, closed and Ri from one every four columns 13. square cross-section positioned at the four vertices of the rectangular ring 12 and a closed float 17 of rectangular cross-section to form a rectangular ring 12 formed thereof, medium And a basic straight and standard shaped shell 11 to facilitate assembly at a small shipyard . This structure withstands the wave-induced stresses of float 17 height,
Due to the closed ring structure, it has higher rigidity than the structure with two floating piers, which enables the elimination of striations, making the structure more compact and easy to build.
You. In addition, the platform 10 has a rectangular cross-section joint 1
6 side supports 15 reach the height of float 17
Includes a rising tube receiving device 14, this structure includes a dynamic load that is applied to the Prato home 10, the problem of interference between the deck and the structure to minimize instep for the joint 16 for supporting lifting < br /> Eliminates the need for board space and is a hazardous area for crew
To increase work safety. In Figure 6,
In addition, a series of 7 sets of riser receiving devices located on the floating pier 18
Position 14 is shown. In FIG. 8, each riser receiving device 14 is shown.
It is shown diagrams for explaining the catenary formed by the
You. 9 and 10, the platform 10 is shown.
The structure of the passive fixing device 19 and the arrangement of the fixing lines are shown.
Have been. The passive fixing device 19 is provided on the platform 10
The load on the cable is reduced, and the cable 20,
Pre-laid, consisting of wire 21 and cable 22
It has a fixed fixing unit. Also, on the platform 10
It is row natural ventilation process zone and large heat dissipation equipment
A truss-shaped deck structure 23 is provided for supporting . Ma
And, the platform 10, process equipment, equipment support 24 to increase the safety of work by complete isolation of utilities facilities and residence facilities are provided. Also, the platform
In the boom 10 , an intake pipe 26 connected to the float 17 by a flexible joint 27 receives cold water to the platform 10 via a bell mouth 28, thereby eliminating the water cooling device. a water intake apparatus 25 in a large depth was, water intake <br/>, injected, for use in cooling and ballast,
It includes fire fighting equipment integrated with utility equipment .

Due to the linear shape and configuration of the shell 11, the utilization of fillet welding, which can be done automatically with high efficiency, is maximized and due to the similar small blocks, the prefabrication of the structure in the workplace. It should be pointed out that is optimized and thus the cost is reduced. The small size of the shell allows more shipyards to have the technical requirements for building the unit, and the shape of the shell allows the shell and deck to be built in separate locations. And both parts are only about 28 due to the reduced size.
joined by a fitting operation achieved within the range of m,
Due to its shape, the shell can be constructed with alternative materials such as concrete.

Thus, the main features of this platform 10 are the integration between the various devices, the spacious deck resulting from the integration, which provides for the natural ventilation of the equipment,
Intake of cold water at large depth, rising pipe supported by float, passive fixing, etc.

[Brief description of the drawings]

FIG. 1 is a front view of a semi-submersible production platform of the present invention.

FIG. 2 is a perspective view of a basic shape of a platform shell.

FIG. 3 is a plan view of the joint of the riser receiving device.

FIG. 4 is a front view of a joint portion of a riser receiving device.

FIG. 5 is a side view of the junction of the riser receiving device.

FIG. 6 is a plan view of a series of rising pipes located on the floating pier.

FIG. 7 is a plan view of the arrangement of the riser receiving device on the platform.

FIG. 8 is an explanatory view showing a catenary formed by each rising pipe.

FIG. 9 is a plan view of the fixing device.

FIG. 10 is an illustrative view of a fixing device.

FIG. 11 is a front view of a deck structure.

FIG. 12 is a front view of the water intake device.

[Explanation of symbols]

 10 Semi-submersible production platform 11 Shell 12 Square ring 13 Strut 14 Ascending pipe receiving device 15 Side support 16 Joint 17 Float 18 Floating pier 19 Passive anchoring device 20 Cable 21 Line 22 Cable 23 Truss deck structure 24 Equipment layout 25 Water intake device 26 Water intake pipe 27 Flexible joint 28 Bellmouth

Front Page Continuation (72) Inventor Jopel Sezer de Andrade de Filho Brazil de Rio de Janeiro, Rio de Janeiro, Avenue Epitacio Pesoa, No. 3100/109 (72) Inventor Marcio Ferreira Allencar Brazil de Rio de Janeiro, Rio de Janeiro, Rua Bolivia, Number 101 (56) Reference Japanese Patent Laid-Open No. 63-87394 (JP, A) Actual Opening 60-20991 (JP, U) Actual Opening Sho 63-6996 (JP, U) Japanese Patent Sho 40 -9813 (JP, B1) Japanese Patent Sho 51-35033 (JP, B2) Actual Japanese 59-37435 (JP, Y2)

Claims (2)

(57) [Claims] 1. A semi-submersible production platform for oil production, water injection, and oil and gas export.
0), a float (17) of rectangular cross section forming a closed square ring (12) and four square cross sections located at each of the four vertices of said closed square ring (12). Posts (13) and process equipment, utility equipment and living facilities
A linear basic-shaped platform shell (1 ) consisting of equipment support (24) with complete isolation of equipment.
1) with a rectangular cross-section joint (16) and the joint
And a lateral support member (15) for the flow.
Riser receiving device (14) located at the height of the gutter (17 )
And reduce the loading of load on the platform (10).
And be passive fixing device (19), process zone and heat dissipation equipment
Truss type deck structure for natural ventilation of the ocean (23)
And a water intake device (25) including a water intake pipe (26) connected at its top to the float (17) by a flexible joint (27) and operating at great depth, the water intake pipe (26) comprising: A semi-submersible production platform, which is equipped with a bell mouth (28) at its lower end. 2. The semi-submersible production platform according to claim 1 , wherein the passive fixing device (19) comprises a plurality of wires (21) connecting between two cables (20, 22).
Pre-laid anchorages, each of which is provided with one cable (2) of each said wire (21).
0) one end of each of the four columns (1
Semi-submersible production platform connected to the float (17) at 3).