SU1405379A1 - Artificial island and method of installing same - Google Patents

Description

(46) 08/30/90. Shl. Number 32

(21) A015227 / 29-15.

(22) 10/28/85

(71) Sakhalin State Research and Development Institute of Gas and Industry

(72) S.P. Laletin, A.M. Kuznetsov and A.T. Bakker

(53) 627.2 (088.8)

(56) U.S. Patent 4,227,829, cl.405-20, 1982.

Author's certificate of the USSR 1233328, cl. E 02 B 17/00, 1984.

(54) ARTIFICIAL ISLAND AND INSTALLATION METHOD

(57) FIELD OF THE INVENTION. The purpose of the article is to simplify installation. An artificial island includes a protective shell made of steel pipes 1, a soil draw and stiffener elements. The pipes 1 will be arranged vertically and provided with openings with sealing pipes 4 located discretely along the height of the island. The pipes 1 are connected by flexible links 3, 3, passing through pipes 4, the axes of which coincide with the axis of pipes 1.

On the extreme pipes of the contour there are coupling devices 6. In each pipe, the Oallasticisation system is installed. The stiffener is made in the form of a rigid floating frame of individual elements. The centers of the holes with nozzles 4 can be offset from the center of the pipe 1 by the value of L g / R. where r is the radius of the pipes, R is the radius of the shell. The containment shell may be composed of individual panels, on the ends of which stiffeners are installed in the form of fixing devices 10. The outline of the containment shell is transported to the construction site in a horizontal, retracted form by tugs. By ballasting, the shell is transferred from a horizontal to a vertical position. Afloat with the help of tugs they close the shell in a circle around a rigid frame. When the shell is made of separate panels, the fixing devices 10 disposed thereon replace the frame elements, again. How many panels with a given radius are fixed and create a shell of the correct shape. 2 sec. and 3 z. p. f-ly, 6 ill.

with

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The invention relates to hydraulic structures and can be used in the oil and gas industry for many years of drilling and oil and gas exploitation.

The purpose of the invention is to simplify the installation.

FIG. 1 shows the unfolded contour of the protective shell; FIG. 2 is the same when the shell is made of separate panels; FIG. 3 shows the contour of the shell in a horizontal transport position; in Fig. A - transportation of the auxiliary frame; on fig.Z - charging contour of the shell around forming auxiliary ra- Mbi; Figure 6 shows an artificial island installed on the seabed, which is filled with sand.

The artificial island includes a protective shell made of steel pipes 1 with the ends closed, a ground core 2 and a stiffening element. The pipes 1 are arranged vertically and are connected through flexible connections 3 (for example, a cable) passing through the pipes through the openings with sealing pipes 4, the axis of which coincides with the axis of the pipes 1, the Branch pipes 4 are located discretely along the height of the island. The tension of the through connections is made by jacks 5 On the extreme pipes of the circuit there are coupling devices 6, and rubber pipes 7 are stretched between the pipes. A partition and a coupling system are installed in each pipe to transfer the shell contour from the horizontal (transport) position to the vertical (working) position. . The stiffening element is made in the form of a rigid floating frame made of elements of the 8 elements, located between the ground core 2 and the protective sheath 1

The centers of the holes through which the flexible connections pass can be shifted from the center of the pipe at a distance of - 1

niya

d ", where r is the radius of the pipes; 50

R is the radius of the shell. The displacement of the wasp along which the pass-through link 3 passes allows avoiding the exposure of the link, thereby prolonging its durability and allowing the pre-tensioned tension of the link to be created by hydraulic jacks 5.

The shell contour may consist of individual panels connected by end-to-end flexible connections 3, passing through the panels in the sealing pipes 4.

The panels are assembled by the mz of several pipes t connected by kerchiefs 9 with a given radius of curvature. On each panel along the edges there are rigid elements made in the form of fixing devices 10. When the ends of the unfolded contour of the casing are wound, the device is fitted to each other.

10 fix the panels to each other with a given radius and thereby allow the creation of a shell of the correct shape.

The method of building the island is as follows. The contour of the steel containment shell, consisting of pipes 1 with plugged ends and connected through flexible connections 3, is transported to the site

construction in a horizontal, expanded form with the help of several tugs 11.

0

five

0

0

Upon reaching the construction site, the islands open the valves installed at the lower ends of the pipes and gradually they are filled with water. By filling the pipes with water and controlling the tugboats, the shell contour is immersed in the sea so that it occupies a vertical position like a float.

At the same time, tugs 11 transport a rigid frame, consisting of elements 8, which, when connected to each other, form a circle, r.

After that, the ends of the split contour of the plant and tugs 11 around 5 elements 8 "with the help of coupling

The devices 6 are joined into the shell of the correct form, and when the jacks 5 are attached, they create the necessary tension of the flexible connections 3.

Then, with additional ballasting, the shell is installed in a pre-built trench of the required depth, which is arranged according to the perimeter of the shell, then its sinuses should be filled with soil during the backfilling of the internal volume of the structure. To increase the strength of the elements, each pipe 1 is poured with concrete. In order to protect the bottom from erosion around

the structures are poured out a stone prism 12..

When performing a protective shell of individual panels, the need for a rigid frame is eliminated. The locking devices 10 located on each panel replace the elements 8 of the rigid frame.

Claims (4)

1. An artificial island including a soil core, a stiffening element, a protective sheath installed around the core, made of steel pipes with positive buoyancy and equipped with a ballasting system, characterized in that, in order to simplify installation, the pipes forming. the shell is arranged vertically and provided with openings with sealing nozzles located discretely along the height of the island, while the pipes are connected by flexible connections passing through the sealing nozzles and the centers of the openings are located in a plane passing through the center of the pipe. 2. Islands according to claim 1, about t l and h a - th y and with the fact that the centers of the holes are offset from the center of the pipe on yr distance and -s towards the island va, where r is the radius of the pipes; R is the radius of the shell. 3. Islands according to claims 1 and 2, characterized in that the protective sheath is made up of individual panels consisting of pipes, the inner surface of which is provided with sheath stiffening elements made in the form of fixing devices mounted on the ends of the panels. 4. Islands of PP.1 and 2, about tl and - h, u and with the fact that the element stiffness is made in the form of a rigid floating frame, located between the soil adr and the protective sheath. I 5, Installation method artificial islands, including transportation to the construction site afloat of a protective shell with the subsequent formation of a soil core inside the A shell, which is characterized by the fact that the protective shell is transported to the construction site in the form of a flat horizontal contour, then by ballasting the protective shell is transferred from the horizontal to the vertical position and the design outline of the island is fixed at the expense of rigid elements, after which the protective shell is closed afloat. Fial  f www ///////// at // ////// ////////// y y: 3 l 0U9, Z l FIG. FIG. five  (“MN to zeplesiar d / /// /// /// ////// / 7 / eleven