SU1283486A1 - Set of pipeline sections for transportation to place of laying - Google Patents

Abstract

The invention relates to the field of construction of subsea pipelines and makes it possible to increase the safety of the package of lashes during transportation to the place of installation. The pipelines are inserted alternately between the plates 3 of the floats 1 and fastened with cables 6 to the bag. Package lashes towed to the place of installation with a cable 11. 1 Cp. f-ly. 3 il. ffi / 3u. i (Л с: to 00 со Ji 00 О)

Description

cffue.2

eleven

This invention relates to the construction of subsea pipelines.

The aim of the invention is to increase the safety of the package during transportation to the place of installation by increasing its rigidity.

Figure 1 shows floats with lashings of subsea pipelines, general view; figure 2 is a view of And figure 1; on fig.Z - T-shaped grip with a cable.

Floats 1 and 2 consist of plates 3. In the middle part, each plate has a T-shaped grip 4 with a root 5 On the root of a T-shaped grip, a cable 6 is attached, at the end of which an elongated ring 7 is installed. frame 8 for fastening the cables 9 attached to the plugs of the rods of the pipeline 10. On the front plug of the float 1 there is a cable 11 for towing all the rods. Floats 1 and 2 are held at a given distance by cables attached to the ends of the floats.

The device is used as follows.

Floats 1 and 2 are lowered into the water and placed at a predetermined distance from each other, determined by the length of the cables. After this, the tubing lines, having a positive buoyancy, are supplied to the floats and inserted between the plates 3 (Fig. 2). The cables 9 are fastened to the frames 8 on the float 1, then the cable 6 is thrown over the lash, the elongated ring 7 is put on the T-shaped gripper 4 and deployed. To keep the cable 6 afloat, along with the elongated ring 7, floating elements, such as foam plastic, are fixed to the cable 6.

.

ten

15

. , 35

20

25

thirty

40

To facilitate the introduction of a subsequent scourge, in the area near the floats 1 and 2, it is given negative buoyancy and all the floats 1 and 2 are rotated, freeing up the insertion of the next scourge plate 3, and so on until one of the lashes comes out on the opposite side. After installing and securing all the lashes between the plates 3 of the floats 1 and 2, the package of the lashes is towed by means of a cable 11 to the place of laying the underwater pipeline.

The proposed device for laying underwater pipelines increases the bending stiffness of the pipeline structure both relative to the vertical and horizontal axes of its cross section, which significantly reduces the bending stresses in the pipeline from the effects of waves and currents during transportation of the lashes to the place of installation.

Claims (2)

1. A pack of pipe tubing for transportation to the place of installation, consisting of a float and its flexible connection to the pipe braids, characterized in that, in order to increase the package's safety by increasing its rigidity, the float is provided with plates arranged radially around its perimeter , interconnected by flexible removable elements forming a socket for lash pipe. 2. Package pop. 1, characterized in that the flexible elements made in the form of ropes. fO srig.Z