SU1219448A1 - Transfer floating dock - Google Patents

Description

This invention relates to shipbuilding, in particular to transfer floating docks.

The purpose of the invention is to enhance the functionality of the transfer floating dock by providing the possibility of completion works and launching self-lifting and semi-submersible floating drilling rigs.

FIG. L schematically shows a transfer floating dock in a complex with a horizontal slipway, a vertical shore wall and underwater supports, as well as water-displacing lower hulls (floats) of semi-submersible drilling rigs (or (conventional vessels), viewed from the top and in the dock; Fig. 2 is a view A in Fig. 1 using a dock for launching a ship; Fig. 3 - the same, with the horizontal position of the towers and using the dock to build a semi-submersible drilling rig for descending; Fig. 4 - the same , with the horizontal position of the towers and mations dock for lowering jack-up rig;.. Figure 5 - is the same, when lowered columns samonodemnoy rig supernatant and a floating dock in Figure 6 - is the same as the horizontal position and the towers using the dock as the quay .dl completion vessels.

The transfer floating dock contains a pontoon 1 with an equalizing ramp 2 and longitudinal rails mounted on the 1st rail and 3, 4 s pro. angular groove 5 and lateral rail tracks 6 on the outer wall 7.

The towers are connected to the pontoon by means of hinged joints 8 located on the dock deck bays and equipped with a turning mechanism (not shown) with the possibility of turning them into a horizontal position on the inner side and forming together with equalizing overpass 2 on the deck of the single working deck.

The width of the towers is equal to the height of the equalizing overpass h. The width of the corner groove is equal to its height h. The hinge joints 8 are placed on the deck 9 on the line of intersection with the inner wall of the towers 10. The bottoms of the projections of the towers formed by the corner grooves are equipped with fender bars 1 i.

Mooring bollards 12 are installed on the lower edges of the outer walls of the towers.

The transfer floating dock works as follows.

When a conventional ship is built, the dock is mounted on underwater supports 13, butt end to the coastal vertical wall 14, while the rail tracks on the leveling bridge 2 are aligned with the corresponding rail tracks 15 on the horizontal slipway 16. From the stocks 16 on ship carriers 17, the ship 18 is moved by urav

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carrying dock 2 dock (Fig. 1 and 2). The docking of the vessel is carried out in the dock, and then its launch into the water according to the well-known descent scheme using the transfer floating dock.

When building a semi-submersible floating drilling rig on the slipway 16, displacement lower hulls 19 are assembled and, on the ship-carrying carriages 17, they are successively moved to a balancing rack 2 docks. They are launched into the water according to the well-known procedure of launching a vessel using a transfer floating dock.

After returning the dock from the excavation pit for flooding and placing it on the underwater supports 13 to the initial position, the towers 4 are rotated from the inside to the horizontal position, in which their outer walls 7 together with the equalizing rack 2 form a single working deck (Fig. 3), and the rail tracks 6 on the outer walls of the towers 7 (FIG. 3) are combined with the corresponding rail tracks 20 on the slipway 16 (FIG.).

The supporting frame 21 assembled on the building berth with the upper body 22 is moved on the slip carts 17 to the formed dock deck 23 and mounted on it so that the supporting columns 24 of the frame hang over the water.

Then, underneath these columns, the lower hulls 19 previously immersed into water are floated and docked with the supporting columns 24. At the end of the docking, the lower hulls are freed from ballast and the assembled semi-submersible drilling rig is removed from the dock.

When building a jack-up floating drilling rig, a jack-up floating drilling rig 25 assembled on the slipway is moved on the slip carts 17 to the deck of dock 23 formed by turning the towers 4 to the horizontal position and mounted on it so that the supporting columns of the installation 25 are hung over the water (Fig. 4 ).

The supporting columns 26 with the help of standard lifting and lowering mechanisms are lowered all the way down to the bottom of the water area 27, and the installation body 28 is lifted up from the dock carts 17, freeing the dock from the load. The dock is debullated and removed from under the hull 28. The hull 28 is lowered on the supporting columns 26 into the water until self-floating (Fig. 5).

When using the dock as a mooring for completing the floating facilities in the intervals between the launching of floating facilities to water, dockable floating facilities are moored to the dock installed on the underwater supports 13 with the towers 4 installed in the horizontal position and fixed to the towers 12 (Fig. 6).

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Compiled by Yu. Senkin

Editor G. VolkovaTehred I. VeresKorrektor S. Cherni

Order 1214/26 Circulation 422Signature

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (1)

TRANSFERABLE FLOATING DOCK, containing a pontoon with longitudinal rail tracks and towers with a longitudinal angular groove in the lower part from the inside, connected to the pontoon pivotally and provided with a drive mechanism, characterized in that, in order to expand its functionality by providing the possibility of performing construction work and launching of self-elevating and semi-submersible floating drilling rigs, the longitudinal rail tracks of the towers are installed on their outer walls, and the hinged connection of each tower with the tone is located on the dock dock on the line of its intersection with the inner wall of this tower, and this connection is made with the possibility of laying the tower on the dock dock. 5 ^ 2. /