| WO/2002/095139 | FOUNDATION IN WATER |
| WO2004076760A1 | 2004-09-10 |
| GB2148365A | 1985-05-30 |
| 1. Oil platform from reinforced concrete, casted into wall-boarding, characterized in that the wall-boarding (10) is executed as remained and is assembled from panels (8), united with rods of space frame (11), used like reinforcing. 2. Oil platform as claimed in Claim 1, characterized in that said rods (11) and panels (8) are assembled by means of polyhedron joining element (15) (in form of rhombi-cub octahedron) with radial screw seats (16); moreover said elements of wall-boarding (10) and reinforcing (11) have the next coordination of sizes: the diagonal of square panel (8) is equal two length of the rod (11) plus one diametric size of joining element (15). 3. Method of building of oil platform, as claimed in Claims 1 , 2, characterized in that on the base, floating in the water, are built tier by tier the walls of close contour; at first is assembled the tier of wall-boarding (10) from panels (8) and rods (11), then said tier is filled by concrete mass (9); moreover, in accordance to walls erection, the platform is loaded by ballast (14), submerging deeper and deeper right until the bottom of platform (7) will be installed on the seabed (23). 4. Method of prevention of explosions and fire on the oil platform, as claimed . in Clams 1, 2, 3, characterized in that the storages for oil (29) or gas (31) are placed sub sea surface (26) and at first are wholly fulfilled by water, but said water (30) is pressed out by oil (29) or liquefied gas (31), pumped into the storages. 5. Method of prevention of oil-pollutions into the sea from the oil platform, as claimed in Claims 1, 2, 3, characterized in that the place of future drill holes (27) in seabed are covered by cowl (21), made inside of the platform, the borders (7) of cowl (21) are deepen into the seabed ground (23), the operations of drilling and oil outputting are executed through the water (22) , fulfilling said cowl (21), moreover during the drilling and outputting the level of water (25) inside of the cowl (21) is kept lower, than level of external sea water (26). in Claims 3, 5, characterized in that the bottom surface of platform made with coming downwards borders (7), capable to be deepen into the seabed (23) and to separate the water (22) inside of the cowl (21) from external sea waters. 7. Method of building of oil platform, as claimed in Claims 1, 2, 3, 5, 6, characterized in that earlier installing of platform to seabed (23), the place of installing is watertight, for example, by layer of clay (24). Alexander TURIN |
Description of invention
The invention relates to oil platform from reinforced concrete, casted into wall-boarding, and to method of its building.
Difficult problem of modern oil production is a pioneering of more and more deep and cold waters of North Sea. According to known Condeep technology this problem may be solved by making of more and more gigantic oil platforms, having normal, long-size reinforcing and casted into removing wall-boarding, which is periodically slipped up by means of cranes, based on the ground close to shore.
Casted platform must be towed from shore to place of installing on the seabed. Now that operation is near the bounds of possibility, is extremely heavy-weight. Simple increasing of platform's size is too problematical!
Problems are intensified by fact, that season of tanker's activity in cold waters is limited by ices, so the new-built North platform must obtain the oil storages, significantly more capacious, than it possible inside of Condeep configuration.
Other problems are to avert a danger of explosions and to prevent an oil wasting of sea waters.
The central aim of invention is to facilitate radically (or to avoid at all) the far towing of deep-water platforms.
Said aim of invention is achieved thanks to using of remained wall-boarding from little, light-weight, easy-assembling panels and rods, manually operable in open sea, and thanks to method that may be called: "Building into the depth".
At first is made the bottom part of platform, floating in the water.
Invention not foresees how it built. For example, it may be assembled from metal or concrete floating elements (barges, air caissons) close to shore or on the place of platform's dislocation.
According to invention the casting of every tier of platform's walls, based on the bottom part, is begun from manual assembly of wall-boarding from panels and rods of space frame, used like reinforcing. Then every tier of wall-boarding is fulfilled by concrete mass. close to shore and may be executed on platform, floating in the sea.
In accordance with erection of the walls, the platform is loaded by ballast, submerging deeper and deeper, right until will be installed on the seabed.
As a result, super hard-weigh towing of completely casted oil platforms is not obvious! Invented platform may be casted wholly on the place of it dislocation or towed in semi-casted state. So the invention allows building significantly bigger concrete oil platforms, having more capacious storages, than earlier.
The invention will now be described by way of example and with
reference to the drawing in which:
- Figure 1 is a fragmental vertical section of oil platform in moment of
assembling of the next tier of remaining wall-boarding.
- Figure 2 is a fragmental section of remained wall-boarding, partially
- fulfilled by concrete mass.
Figure 3 shows a bottom of oil platform from side of seabed.
Figure 4 is a side view with partial sections of oil platform, installed on the seabed.
Figure 1 shows a fragment of platform, floating in water 5. The bottom of platform was assembled from steel caissons with sloped walls 6. The double walls of caissons 6 make coming downwards borders 7.
Steel caissons were added by space-frame and the panels 8, making the tier of remained wall-boarding that was fulfilled by concrete 9.
The new tier of wall-boarding 10 is in process of work. One worker assemblies the rods of space frame 11 and the panels 8. The other worker water-tights the joins 12 between the panels 8.
Fragment 13 of wall-boarding 7 is increased on Figure 2.
The platform was loaded by some portions of ballast water 14.
Figure 2 shows the section of remained wall-boarding 10 on the level of concrete 9. The corners of panels 8 are joined between itself and with rods of space frame 11 by means of joining element 15 in form of polyhedron (more exactly, rhombi-cub octahedron), with radial screw seats 16. part of rod's body has three-T profile 17. The heads of screw 18 on the ends of the rod 11 are accessed to immediate contact with assembling instrument.
The panel's material is a glass-ceramic. At first the panel 8 was pressed from semi-melted slag-glass. (The melted slag-glass after furnace is an industrial waste, having zeroed or negative cost.) After crystallizing the slag-glass turns into the glass-ceramic, durable like iron and fire-resistant.
The joins 12 between the panels 8 are water-tight by crossing glue tapes 19.
The edges 20 of panel 8 are sloped and capable to make linear joins 12 with the same panels, placed in all three mutually perpendicular flatness' s.
It is possible thanks to the next coordination of element's sizes: the diagonal of square panel 8 is equal two length of the rod 11 plus one diametric size of polyhedron joining element 15.
Author of presented invention claimed said coordination of sizes in his earlier invention, "Building System", the International Filing Date: 10.02.2003; the PCT International Publication Number: WO 2004/076760 Al; Corrected version of Abstract was published in PCT Gazette JY 52/2004 of 23.12.2004 and in JNs 12/2005 of 24.05.2005, Section Π. (Said Abstract is presented on Supplement).
Figure 3 shows the bottom of oil platform, assembled from steel caissons 6 with cowl 21 in center. The double walls of caissons 6, filled by concrete, make coming downwards borders 7, capable to be deep into the seabed ground and separate the water inside the cowl 21 from sea waters.
Figure 4 shows side projection of oil platform, installed on the seabed 23.
The partial section shows the layer of clay 24, tightening the seabed ground 23.
The water 22 inside of the cowl 21 is separated from sea waters 5 by borders 7, deepen into the seabed 23. The level of water 25 inside of cowl is kept lower than sea surface 26. The hole 27 in the seabed 23 was drilled under the cowl, therefore all oil pollutions 28 from hole 27 may be collected and controlled.
Outputted oil 29 was pumped into the storage, fulfilled earlier by water, so the biggest part of water 30 was pressed out. Air inside that storage is absent and the danger of explosion is absent too. Outputted gas 31 was pumped into the storage, placed on the depth, where pressure and temperature of external water 5 is equal to pressure and temperature of liquefied gas 31. like inside of oil platform, having known Condeep configuration.
Looking to presented drawings it is easy to discover the wide variability of invention, its universality.
Three little, light-weight elements: rod 11, panel 8 and joining element 15 make unlimited number of space combinations. In centralized automate production these elements may be very cheap! Manual assembling of these elements is very easy and fast. The method "Building into the depth" opens new possibilities not only for oil platforms building, but for hydro-technical building at all.
Alexander TURIN