RU140168U1 - MARINE SELF-LIFTING PLATFORM FOR THE DEVELOPMENT OF THE CONTINENTAL SHELF - Google Patents

Abstract

A marine self-elevating platform for the development of the continental shelf, which includes a displacement hull with set elements, mounted to move along the support columns by means of a lifting and lifting device with a hydraulic lifting and crushing mechanism, characterized in that the said hull is mounted to allow operation in extreme shallow water with the possibility of lowering to the ground along the support columns, each of which in the lower extremity is made in the form of a pin pile, and pa hull bottom set of stiffness located with its outer side, wherein for operation at depths exceeding shallow depth limit, each of the support columns is provided with a removable shoe mounted to releasably connect with a lower extremity of the supporting column.

Description

The inventive utility model relates to hydraulic structures, and more specifically to the designs of marine self-lifting platforms for the development of a shallow continental shelf.

Known marine self-lifting platform for the development of the continental shelf, including a displacement casing, mounted to move along the support columns by means of a support-lifting device with a hydraulic lifting and crushing mechanism (see US patent No. 3628336, IPC E02B 17/00 from 1969 )

The disadvantage of this known platform is the limitation of the area of operation in shallow water according to precipitation conditions.

Known marine self-lifting platform for the development of the continental shelf, including a displacement casing, mounted to move along the support columns by means of a support-lifting device with a hydraulic lifting and crushing mechanism (see US patent No. 5190410, IPC E02B 17/00 from 1991 - prototype) For holding on the ground, this platform contains a base plate (base mat), interacting with the supporting columns. In order to transfer this installation from a worker to a stowed position, it is necessary to carry out a number of rather labor-intensive operations, including pulling the base plate to the displacement body using the support and lifting device.

The disadvantage of the prototype is the design complexity due to the presence of a support mat, as well as the inability to use such a platform in water areas with a wide range of depths.

The objective of the claimed utility model is to create a fairly simple in design universal marine self-lifting platform for safe operation at various depths, including in extreme shallow water.

The technical result of the claimed utility model is to expand the operational capabilities of the marine self-lifting platform by providing the ability to work in extreme shallow water while increasing reliability and simplifying the design.

The specified technical result is achieved in a marine self-elevating platform for the development of the continental shelf, which includes a displacement hull with recruitment elements mounted with the ability to move along the support columns by means of a lifting and lifting device with a hydraulic lifting and crushing mechanism, so that to ensure the ability to work at the maximum the shallow water said housing is mounted with the possibility of lowering to the ground along the support columns, each of which is made in the lower extremity in the form of a pin pile, and the stiffening ribs of the bottom set of the said body are located on its outer side, while for operation at depths exceeding the depths of the shallow water, each of the support columns is equipped with a removable shoe mounted with the possibility of detachable connection with the lower end of the support column.

The figure 1 shows the inventive marine self-lifting platform in the working position, installed at a depth exceeding the limit shallow water, side view;

in FIG. 2 - the inventive marine self-lifting platform in the working position, installed in extreme shallow water, side view;

in FIG. 3 - supporting column of the inventive platform with a shoe mounted in its lower part, side view;

in FIG. 4 - supporting column of the inventive platform, mounted in extreme shallow water, side view;

in FIG. 5 - node A of FIG. 2.

The inventive marine self-elevating platform for the development of the continental shelf includes a displacement hull 1 with the elements of the set 2 in the form of stiffeners. The housing 1 is mounted with the possibility of movement along the support columns 3 by means of a support-lifting device 4 with a hydraulic lifting and crushing mechanism 5.

To ensure the ability to work in extreme shallow water, the housing 1 is mounted with the possibility of lowering to the ground along the support columns 3, each of which in the lower extremity is made in the form of a pin pile.

To ensure the stability of SPBU on soils with weak bearing capacity, the housing 1 has a large bottom surface area due to the location of the stiffening ribs of the set of 2 bottoms from its outer side.

To work at depths exceeding the depths of extreme shallow water, each of the support columns 3 is equipped with a removable shoe 6 mounted with the possibility of detachable connection with the lower end of the support column 3 by means of pins 7.

To place the removable shoes 5 in the transport position in the housing 1, niches 8 are made. The shoes 5 are fastened in the niches 6 by means of pins 9.

In the drilling mode, building 1 rests on the ground in extreme shallow water at depths, the lower limit of which is close to the platform sediment, while ballast is received in building 1 to ensure stability. The supports 3 by the lifting mechanism 5 are caught in the ground like spall piles. After the well has been drilled, the platform is switched to the lifting mode of the housing 1. The supports 3 are removed from the soil alternately by a soil drainage system (not shown) under the bottom of the housing 1 water is pumped to eliminate the phenomenon of “suction” to the soil.

In drilling mode, at depths exceeding the extreme shallow water, the platform works as a normal self-elevating installation, body 1 along the columns 3 with the help of lifting mechanisms 5 rises to the desired height above the water level. In this case, the support columns 3 are lowered to the ground together with the shoes 6, and the pins 9 are pre-dismantled.

When operating the platform at depths of extreme shallow water, the supporting columns 3 operate in the mode of pin piles, and only the pins 7 are subject to dismantling.

The technical and economic advantages of the claimed utility model is the expansion of the platform’s operational capabilities by providing the ability to conduct work in extreme shallow water from 2 meters on weak-bearing soils - both exploratory drilling and other types of work, including pile driving, production drilling, etc. - with appropriate platform equipment. This is achieved by increasing the reliability of the design when laying on the ground by ensuring the perception of the loads acting on the installation with the help of support columns operating in the mode of pin piles, including on soils with weak bearing capacity

The self-elevating floating drilling rig of the presented design, with the possibility of laying on the ground, designed for operation in extreme shallow water on weakly bearing soils, is very relevant and can be used to develop the continental shelf of the Russian Federation, including in the areas of the Ob-Taz Bay.

Claims (1)

A marine self-elevating platform for the development of the continental shelf, which includes a displacement hull with set elements, mounted to move along the support columns by means of a lifting and lifting device with a hydraulic lifting and crushing mechanism, characterized in that the said hull is mounted to allow operation in extreme shallow water with the possibility of lowering to the ground along the support columns, each of which in the lower extremity is made in the form of a pin pile, and pa hull bottom set of stiffness located with its outer side, wherein for operation at depths exceeding shallow depth limit, each of the support columns is provided with a removable shoe mounted to releasably connect with a lower extremity of the supporting column.

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