SU982965A1 - Arrangement for mounting support column of self-raising offshore platform - Google Patents

Description

The invention relates to shipbuilding and is intended for use when building self-lifting platforms for offshore oil production.

There is a known method of installing QHHUk columns in vertical shafts of a floating self-lifting platform, concluded with the use of portals and cargo (EDW tools), the onboard opening is horizontally opposite the vertical shafts, the upper section of the column is horizontally lifted through the portal, upwards by the portal, the plant t the subsequent section of the column to be aligned in plan with the upper section and lower the latter for racking, after which both sections are lifted repeating the above-mentioned charging and docking operations of the following section After the formation of a full column, th close the side opening of the platform fIj. Its disadvantage is the need to carry out all operations to build the supporting columns afloat.

Closest to the invention, the technical solution is a device for mounting support columns of a marine self-lifting platform, including a slip floor and

Flyover The device also includes a mooring wall with an airtight pontoon, interconnected by a cable-block system 1 2 3.

The sections of the support columns using the specified device are assembled on the slip foundation and transported on a ramp to a sealed pontoon, then the pontoon, with the support column section installed on it, is flooded and fed to the shaft assembly platform under the platform, after which the production t installation of sections of the support column on the platform.

A significant disadvantage of this method is low productivity. Assembly and installation of support columns, which reduces the efficiency of installation as a whole.

The purpose of the invention is to increase the efficiency of installation.

This is achieved by the fact that the device is equipped with a movable rigid frame and a lifting jib, pivotally connected to the overpass and freely supported on a support that is pivotally connected to the bottom of the water area.

Claims (2)

FIG. 1 shows the device, the jam on the side; in fig. 2 is the same, top view in FIG. 3 is the same, side view (additional support in a horizontal position) j, in FIG. 4 - the same. the beginning of the installation of the support column on the platform; in fig. 5 - the same, the end of the installation process. ; The device for assembling and mounting the support column of the offshore self-lifting platform contains a lifting jib 1; made in the form of an extension of the overpass 2 and connected to it with the help of the hinge 3. The lifting arm 1 freely rests on the additional support 4 which is connected to the bottom of the water area with the help of the hinge 5 and the cable block system b with the slip foundation 7 and the mooring wall 8. Overpass 2 and the lifting arm 1 is equipped with a rigid under the movable frame 9, which, when being moved, has the possibility of alignment with the well 10 located in the pile foundation 7 with the well 11 located at the bottom 12 of the water area. The device works as follows. Crane set lifting. the lowering device 13 onto the rigid movable frame 9, and sections 14 and 15 of the supporting column 16 - into the wells of 10 and 11, and also the section 17 of the supporting column 16 is brought into engagement with the lifting and lowering device 13. Thereafter, the frame 9 is moved along the overpass 2 is driven by a drive up to aligning successively with wells 10 and 11, while performing docking operations at sections 17, 15 and 14 by moving section 17 by lifting the dao-lowering device 13 and completing the formation of the support column 16, while the additional support 4 provides a stable position wadded cargo booms 1. After that, the support column 16 is lowered by a lifting and lowering device 13 into the well 11 and freeing the additional support 4 from the load from the load-carrying boom 1, which at this time rotates somewhat b relative to the hinge 3. The cable block system 6 actuates and rotates the additional support 4 around the hinge 5 before laying it on the bottom of the water area. Platform 18 is ballasted and floating afloat to support columns .He 16, in this case, a side opening 19 is made in the platform in advance, lifting device 13 is disconnected from rigid movable frame 9 and lifting boom 1, is retracted; the platform 18 with the mounted support column 16 from the quay wall 8, the cable-to-block system 6 is activated and rotated to - .j. full support 4 around the hinge 5 all the way into the lifting jib {FIG. five /. The economic effect is achieved due to the provision of in-line assembly and installation of support columns under conditions of j. Max. Close to the slipway. The invention makes it possible to assemble supporting olonna ashore, without using unique heavy-duty cranes, without streaming the flow with the support column section, which takes place in the known device, without submerging the indicated section under the platform. The introduction of the invention can provide an economic effect of up to 5,000 thousand rubles due to the elimination of heavy and. labor-intensive operations. Apparatus of the Invention A device for mounting support columns of an offshore self-lifting platform, including a slipway and an overpass, characterized in that, in order to increase the efficiency of the assembly, it is equipped with a movable rigid frame and a lifting jib that is hinged. tied to the bottom of the water area. Sources of information taken into account in the examination 1. USSR author's certificate in application 2890660 / 27-11, KJt. B 63 B 35/44, 20.02.80. 2.Avtrokoe certificate of the USSR 360460, CL. B 63 B 35/44, 1971 (prototype). s td /  . inr. ijjjf 7 WW / i / 7777yS fef # VV / Fig1 /