SU698541A3 - Oil-industry off-shore platform - Google Patents

Description

I

The invention relates to stationary offshore oil field platforms, in particular gravity type.

A known platform comprising a cylindrical body, a surface platform and a base. The cylindrical body in diameter with the shoulders is tapered from top to bottom. The base of the platform is used as a ballast for; increase its stability at the bottom, and the body has horizontal partitions, forming chambers located one above the other 1J.

The disadvantage of this platform is the inconvenience of positioning the cameras in view of the fact that it creates difficulty in maintaining the underlying cameras.

The oilfield offshore platform is known, containing a platform, a vertical support with a central well and a bottom foundation 2.

In this platform, the central well is divided into radial partitions, which form chambers used as tanks. The bottom floor does not communicate with the site and the environment and serves

only for resting the platform on the seabed. All oil field equipment is located on the upper working platform. The disadvantage of this platform should be attributed to the large size of the upper working platform, to accommodate all the operational equipment, and pipelines.

The aim of the invention is to simplify the design and provide ease of operation.

This goal is achieved by the fact that the platform is provided, made on the bottom of the base, communicating with the central well and between each other by tunnels arranged radially and circumferentially and having insulated chambers for accommodating equipment, apparatus and pipelines, and at least one The chambers have a lock chamber, and the support has peripheral wells for connecting the chambers to the site.

Claims (2)

FIG. 1 - a general view of the platform with a cut; in fig. 2 is a sectional view of FIG. one; on fng. 3 - section bb FIG. 2; in fig. 4 is a partial view of section A-A. The oil industry gas turbine unit 1 contains a platform 2, a vertical cylindrical support 3 with a concentric well located in the center 4, a cryon base 5 in which there are tunnels communicating with each other and the central well 1, which are located along radii 6 and circumferentially, those 7 , forming insulated chambers 8, for placement of equipment, apparatus 9, and pipelines 10. Circular and radial tunnels are equipped with airlock chambers 11, which separate radial tunnels from circular and from the well. The luggage compartment is made in the form of waterproof partitions 12, on which waterproof doors 13 are installed. The pipeline is taken out from the platform to the outside through a sleeve 14, which is sealed by two special inflatable elements, 15, which increase their volume from the compressed air source. The opjmoHHoe base 5 is composed of a plate 16 for transferring vertical loads from the platform to the ground, the plate along the contour has a circular wall 17 with openings 18, and between the wall and the support the plate is reinforced with circular 19 and radial 20 edges. Holes 8 serve to prevent the ground from spreading beneath the slab. The vertical thigil drike support 3 for the rigidity of the cylinder is composed of separate vertical walls 21 with a convexity outward, and the curvature radius of the surface of the walls is smaller than the radius of the support cylinder described, therefore recesses 22 are formed at the junction between the stems. The upper edge of the vertical cylindrical support above the water level, but do not reach the platform 2. The platform supports the platform with support through racks 23. The upper part of the wall of the iodonic support in the zone of influence of the waves is permeable water-borne through a plurality of holes 24. The inner cavity of the support 3 is divided by vertical partitions 25 arranged radially to stiffen the walls of the support. The vertical partitions in the places adjacent to the central well and the walls of the support split into two, forming additional vertical shafts of the triangular shape Mbi, respectively 26 and 27. The vertical partitions do not reach the hole in the walls of the support and end at the level of the lower row of the hole. In the upper part of the cylindrical support, the walls are connected to the well by radially arranged tubular beams 28. The central well 4 forms a shaft which connects the underwater tunnels and their chambers with the surface of the bottom 2. The central well passes through the whole process piping from the equipment and devices to the area; to submarine systems. In case of shortage of space for the pipelines, vertical axts 26 and 27 can be used (Fig. 4). The entire piping system inside platform 1 communicates with the outer section of the pipeline 28. The pipelines are introduced into the platform and the tunnel is drained as follows. Water pipes 28 of the outer pipe are inserted into the flooded radial tunnel by aquifers, sealing elements 15 are inflated through the couplings 14 and the compressed air system from the platform, separating the outer pipe segment from the inner one. In order to finally seal the impermeable area, the tunnel is completely dried out with compressed air while maintaining the counter-pressure to the external hydrostatic pressure. The space between the two sealing elements 15 is then filled under pressure with epoxy resin, which, after solidification, maintains a constant sealing of the inlet to the radial tunnels. The inner end of the pipe is connected to the flow meter 9 and the piping 10, the internal piping system communicating with the platform. The outer end of the pipe is connected by divers to subsea pipelines laid on the seabed. In this way, the technological equipment of the platform is connected to the feed pipelines of the external power supply system. Learning about the high cost of offshore oil field facilities, reducing the working area of the equipment platform increases the economics of using this type of structure, and the availability of servicing underwater pipelines and equipment under normal atmospheric pressure increases the reliability of the entire system piping. Claims of the invention The oilfield offshore platform comprising a platform, a vertical support with a central well and a bottom foundation, characterized in that, in order to simplify the design and provide ease of operation, it is provided with communicating tunnels with the central well and between them arranged radially and circumferentially ™ and having isolated chambers for accommodating equipment, apparatus, and pipelines, at least one of the chambers having a lock chamber, and It is time to have peripheral wells for the connection of cameras with the platform. Sources of information taken into account in the examination 1. French patent number 2229816, class E. 02 17/00, olublik.1974. 2. US patent N 3624702, cl. E 02 B 17/02, published 1971.