SU1184896A1 - Versions of method of erecting support columns of floating drilling rig - Google Patents

Description

The invention relates to shipbuilding and relates to the installation of sectional support columns of floating drilling rigs.

The purpose of the invention is to reduce the complexity and increase assembly efficiency.

FIG. Figure 1 shows the outrigger and portal units with lifting mechanisms (mounted on the cart's slipway, the deck of the transfer dock is combined with the extension embankment); in fig. 2 - outrigger on the deck of the transfer dock; in fig. 3 shows the node I in FIG. four; in fig. 4 is a view A of FIG. 2; in fig. 5 - an outrigger with an installed portal and a formed section of the support column; in fig. 6 - outrigger with the portal raised on the supports (the section of the supporting column is moved under the outrigger); in fig. 7 - transfer dock moved to the floating outfitting base where the platform is located; in fig. 8 - supports removed from the outrigger; in fig. 9 is a view B in FIG. eight; in fig. 10 - outrigger lowered onto the deck of the transfer dock and prepared for docking afloat with the hull of the platform; in fig. 111 is a schematic diagram of a method using a single-dock, side view in fig. 12 - the same, top view; in fig. 13 is a second embodiment of the method, side view; in fig. 14 - the same, top view.

The method according to the first embodiment is as follows.

The outrigger 1 (part of the hull of the floating platform), assembled, for example, using a crane (not shown) with portal 2, including lifting mechanisms (not shown), is moved along the outfitting embankment 3 on the slipway carts 4 and installed on the deck 5 of the transfer dock 6 so so that its mounting edges 7 protrude beyond the edge of deck 5 (FIG. 2). The transfer dock is fixed relative to the final embankment 3 by means of the brackets 8. The outrigger 1 is mounted for movement in vertical guides 9 fixed on the towers 10 of the transfer dock 6 and vertical guides 11 fixed on the outrigger 1. The installation is made by lowering the top element 12 ( Fig. 3). Then outrigger 1 with portal 2 is assembled with the help of transfer dock 6, for which the latter with the outrigger 1 installed on it is heated until the deck 13 of the outrigger 1 is combined with the outboard embankment 3, and fixed by means of brackets 8. Then the portal 2 with lifting mechanisms is moved on the slipway carts 4 on the deck 13 of the outrigger 1, for which on the deck of the outrigger 1 lined technological rails 14. Lowering the portal 2 on the deck 13 and the outriger 1

on deck 5 is carried out with the help of hydraulic jacks (not shown) and slipway trolleys 4.

After assembly and installation of the outrigger 1 with the portal 2 and the mechanisms for lifting on the deck 3 of dock 6 into the shaft 15 of the outrigger 1, three sections 16 of the support column 17 are fed from the top using a crane (not shown) and interconnect them. Outrigger 1 with the help of lifting mechanisms lift in the vertical guides 9 to a height greater than the height of one section 16 mounted on the trolley 4.

Under the outrigger 1, the supports 18 are turned on, they are lowered onto them and the assembled portion of the support column 17 is lifted by means of standard lifting mechanisms. Sections 16 turn over the crane into a vertical position (FIG. 6), on the slip carts 4 they move under the outrigger 1 and dock with the raised section of the supporting column 17. Then the section of the supporting column 17 is lifted again and the operations are repeated until the full formation of the supporting column is completed, and then wind up and dock with the specified column shoe 19.

The transfer dock 6 is moved to the platform body 20, which is located on the floating outfitting base 21 (see FIG. 7) so that its edges are hung over the water from three sides. Ballasting the dock 6 aligns the position of the outrigger 1 relative to the body 20 of the platform, and then connect them. Then, additional elements 12 are removed, disconnecting the transfer dock 6 and outrigger 1, attach dock 6 and remove it from under outrigger 1.

In another case, the assembled column 17 is lowered to deck 5 and the outrigger 1 is lifted above the supports 18, which are then pulled out from under the outrigger 1 (FIG. 8), and the latter is lowered onto deck 5 by standard lifting mechanisms to the floating dock 6 platform launched into the water (Fig. 10). Ballasting the dock 6 aligns the position of the outrigger 1 with respect to the housing 20, after which they are connected afloat by known methods using known sealing devices.

Next, remove the additional element 12, while separating the dock 6 and outrigger 1, attach the dock 6 and remove it from under the outrigger 11.

In the presence of one-hull dock 22, three or more support columns 17 are simultaneously formed and then joined to the platform body 20 in the same way. For this purpose, the dock 22 is moored to the embankment by a hinged side 23 (FIGS. 11 and 12).

The method according to the second variant is as follows.

1184896

An outrigger 1 with a portal 2 and lifting mechanisms is installed on the slipway next to the platform body 20 opposite the docking point, pre-docked with the platform body 20, but not fastened to it, fix the outriggers 1 with the possibility of vertical movement in vertical guides 9 racks 24 fixed to the foundation slipways. Then repeat the previously described operations

the formation of the support column 17. After the formation of the support column 17, the outriggers 1 are raised to their full height using the lifting mechanisms above the supports 18. The supports 18 are removed and the outriggers 1 are lowered to align their butt edges 7 with the butt edges of the platform body 20, then fasten them together and detach outriggers 1 from racks 24.

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Claims (4)

1. The method of mounting the supporting columns of a floating drilling rig, including assembling the installation from separate parts, supplying it with mechanisms for lifting the supporting columns, forming supporting columns first by feeding the sections into the shafts from top to bottom with a crane and then increasing them to the full height of the supports with separate sections from the bottom up, characterized in that, in order to reduce the labor intensity and increase the efficiency of the assembly, the column is formed within a part of the outrigger installation before connecting it to the platform, with the outrigger being installed on the deck in front of active dock in vertical guides with the possibility of vertical movement, while the docking edges perform protruding beyond the deck of the transfer dock, and after the formation of the column, the transfer dock is moved to the platform installation site and joined with it. 2. The method according to p. 11, characterized in that the platform is installed on the outfitting base or afloat. 3. A process assembly supporting columns floating drilling rig, comprising installing the assembly of the individual parts, supplies its lifting mechanisms supporting columns, supporting columns forming first tap sections in the shaft top to bottom followed by _a build-up to full height hydrochloric supports separate sections below! Δ up, characterized in that, in order to reduce labor intensity and increase assembly efficiency, parts of the installation, consisting of a platform and outriggers, are installed in the assembly position, and the outriggers are installed in the ikalnyh pile guide racks, after which the column is formed within the outriggers and connect them with the platform. FIG. one 5 and „„ 1184896 > one 1184896 2