SU1030489A1 - Method of installation of support pillars of self-lifting drilling sea platform - Google Patents

Abstract

THE METHOD OF INSTALLATION OF SUPPORTING COLUMNS OF SELF-RISING DRILLING EQUIPMENT, consisting in the construction of the body of the drilling rig, its lowering into water, the installation of regular hydraulic lifts on it and the formation of supporting columns with a crane on top of the first and all subsequent sections of each of the supporting columns to their full height that, in order to reduce the laboriousness of the work, the supporting columns are pre-assembled to a height exceeding the depth of the water area and the value of the crush. of the above-mentioned axes, then crush the supporting columns into the ground by raising the rig platform from the water, build up the columns to full height, lower the platform onto the water, pull the supporting columns out of the soil and raise them to the stopping position. & (L 00 about N 00 with

Description

The invention relates to shipbuilding, and to methods for assembling supporting columns of self-elevating floating drilling rigs.

There is a method of mounting sections of the supporting columns of floating drilling rigs using pontoons, lifting and sectioning equipment and a platform with a bottom, at which the supporting sections of the columns are mounted on the pontoon in a vertical position and fed to the lifting and lowering device in the mounting zone, with the first section being served from above, and the following - from the bottom of the platform 1.

There is also known a method of mounting the support columns of self-lifting floating drilling rigs, which consists in building the rig housing, launching it into the water, installing regular hydraulic lifts on it and forming the support columns with a crane feeding the first and all subsequent sections of each of the support columns to complete them. height 2

The disadvantages of the known methods are the large laboriousness and duration of installation, as well as the high cost of the equipment used.

The purpose of the invention is to reduce the complexity of the work.

This goal is achieved by pre-assembling the supporting columns to a height exceeding the depth of the water area and the amount of crushing of the specified columns, after which the supporting columns are pressed into the soil by lifting the rig platform out of the water, expanding the columns to full height, lowering the platform onto the water, pulling the supporting columns columns of soil and raise them to the marching position.

FIG. 1 shows the first stage of the installation of supporting columns at the quay of the construction enterprise embankment; in fig. 2 - floating drilling rig with supporting columns lowered to the bottom of a deep or naturally deeper section of the water area that does not have rocky soil; in fig. 3 - pushing the supporting columns into the ground; in fig. Stage 4 - Stage II - Installation of support columns.

The method is carried out as follows.

After the formation of the rig 1 of the drilling rig is completed, its launching and installation on the deck of the standard hydraulic lifts 2 with the help of cranes used in the installation of the supporting columns, the lower 2 parts of the 3 supporting columns 3 the five lower sections, and then the subsequent three or four sections, each {of the supporting columns of the drilling rig. Following this, with the help of lifts 2, the mounted sections of the supporting columns are lowered up to the stop of their lower ends on the bottom of the water area at the outfitting quay. After that, with the help of a crane, 4 support columns that are next in height to the height of the section above the water are slightly lower than the maximum lifting height of the crane hook, mounted on top (Fig. 1, this I).

Then, with the help of freewheel lifts 2, the supporting columns are raised to the initial position and the drilling rig is transferred to a specially deepened or natural recess area of the enterprise, the bottom of which does not have

0 rocky soil, where with the help of standard lifts 2, the supporting columns are lowered to the bottom of the water area (Fig. 2) and the lifting of the rig 1 of the drilling rig above the water by standard lifts 2 crush them (supporting columns) into the ground until the height of the mounted lower parts the supporting columns above the water is sufficient to mount the upper sections 5 of the supporting columns with a crane (Fig. 3), then lower the casing 1 of the drilling rig

0 are installed in the displacement position and the support columns are mounted to their full height (Fig. 4), stage II). After the installation of the support columns to the full height is completed, the latter are lifted by regular lifts 2 to the initial position.

5 and the drilling rig is being transferred for completion.

The method of mounting support columns can be used in the construction of floating drilling rigs both at shipyards with dry docks, and without them, with a limited height of lifting of the hook servicing their load-lifting cranes, as well as a specially deepened or having a natural dredging portion of the adjacent water area, the bottom which has no rocky ground. In this case, the depth of crushing into the ground of the supporting columns can reach 40 m, which will ensure the implementation of the proposed method.

The economic effect of the application of the proposed method will be 838 thousand rubles.

0 when installing the supporting columns of one self-lifting floating drilling rig.

F // 5

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Claims (1)

METHOD FOR INSTALLING SUPPORTING COLUMNS OF SELF-LIFTING FLOATING DRILLING UNITS, which consists in building the rig body, putting it into the water, installing standard hydraulic hoists on it and forming support columns with the crane supplying from the top the first and all subsequent sections of each of the support columns to their full height, differing the fact that, in order to reduce the complexity of the work, the support columns are pre-mounted to a height exceeding the depth of the water area and porous columns into the ground by lifting the rig platform out of the water, extend the columns to full height, lower the platform to the water, pull the support columns out of the ground and raise them to the stowed position. 4 ^ oo so