JP2583279B2 - Long underwater laid object - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION The present invention relates to a plurality of suspensions suspended from the sea from a production facility offshore which produces fluids that are pumped offshore, such as crude oil or natural gas. The present invention relates to a long underwater laid object including a fluid transport pipe, a power cable, a communication cable, and the like.

(Prior art)

For example, fluid transport pipes laid between an offshore oil field and floating production facilities consist of flexible pipes composed of a composite of metal and plastic, and the demand for them is increasing gradually. . Offshore oilfield production facilities include not only fluid transport pipes for transporting crude oil and natural gas, but also pressure water injection pipes,
Hydraulic pipes for controlling hydraulic equipment, power cables, communication cables, etc. are required, and these long bodies for underwater installation are suspended from the floating body that is a floating production facility and installed in the sea.

This long underwater laid object can be laid and suspended by tying these long bodies (the long underwater laid object body) together, or can be housed together in a large-diameter protective steel pipe. I have.

Fluid transport pipes transport large quantities of crude oil and natural gas at high temperatures and pressures, but these fluid transport pipes often have an outer diameter of 200 to 300 mm and a unit weight of about 100 to 200 kg / m. If a long underwater laid body such as a fluid transport pipe is suspended and laid in a lump, construction work and handling are not easy, and in particular, it is not possible to flexibly cope with maintenance, inspection, and expansion of each fluid transport pipe. .

For this reason, attempts have been made to hold the plurality of long underwater laid object bodies at a distance from each other. In this way, when setting the distance between each of the long underwater laid bodies, it is desirable to set the distance to be small in consideration of the balance between the tension and bending applied to these laid bodies. Spacers are used to set the intervals between the laid object bodies so that the laid object bodies do not entangle or collide with each other.

[Problems to be solved by the invention]

However, as shown in FIG. 1, when the floating body 1 on which the long underwater laying object 10 is suspended is rotated by pitching as shown by an arrow, it is restrained by the spacer means and the free movement in the axial direction is hindered. As shown in the inspection, each of the installed fabric bodies has a drawback that abnormal deformation occurs due to excessive bending load or torsional force applied around the restraining part of the spacer means, and the repeated installation damages the fabric body. .

SUMMARY OF THE INVENTION An object of the present invention is to avoid the above-mentioned drawbacks, and to effectively move these adjacent bending objects and torsional forces by moving the adjacent objects of the building relative to each other in accordance with the bending loads and torsional forces applied to the respective objects. It is an object of the present invention to provide a long underwater laying which is set at a distance from each other so that it can be absorbed and does not cause damage.

[Means for solving the problem]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a long underwater laying apparatus comprising a plurality of long underwater laying article bodies suspended from a floating body on the water surface and held at intervals from each other by spacer means. In the object, the spacer means can relatively move a clamp held by each long underwater laid object body and an adjacent clamp in a direction parallel to the axis of the long underwater laid object body and a plurality of long underwater objects. A connection part slidably engaged with each other so as to be capable of pivoting with each other in a horizontal plane perpendicular to the axis of the body of the laid object. Things.

[Action]

In this way, the spacer means for setting the distance between the long underwater laid object bodies can move relative to each other in the axial direction of the long underwater laid object body, and in a horizontal plane perpendicular to the axis of the plurality of underwater laid object bodies. In this way, even if pitching occurs in the floating body and the floating body rotates as shown in FIG. 1, each long underwater laid object body is axially moved along this axis by the spacer means. It is not restrained even in the vertical direction, so that no undue bending load or torsional force is applied and no damage is caused to the installation object body.

〔Example〕

Embodiments of the present invention will be described in detail with reference to the drawings.
FIGS. 2 and 3 show a long underwater laid object 10 according to the present invention, and the long underwater laid object 10 is, as shown in FIG.
It consists of a plurality of long underwater laid object bodies 16 suspended from the floating body 1 on the water and held at intervals from one another by spacer means 14 which are suspended in the water and provided in multiple stages at intervals in the axial direction. . As described above, the long underwater laid object body 16 includes a flexible long body such as a fluid transport pipe, a pressure water injection pipe, a hydraulic pipe, a power cable, a communication cable, and a power / communication combined cable. I have.

The spacer means 14 is capable of relatively moving the clamp 18 held by each long underwater laid object body 16 and an adjacent clamp 18 in a direction parallel to the axis of the long underwater laid object body 16 and having a plurality of long And a connecting portion 20 which slidably engages with each other so as to pivot relative to each other in a horizontal plane perpendicular to the axis of the shakusubmersible body 16. These clamps 18 and connecting portions 20 can be made of metal or synthetic resin. In the embodiment shown, the clamp 18 is divided into two clamp halves 18A,
The clamp halves 18A, 18B are gripped by the long underwater laid body 16 by bolts and nuts 22, and one clamp half 18A has an extension 19 at one or both ends thereof. In addition, the connecting portion 20 is composed of an outer cylindrical portion 20A integrally formed with the extension portion 19 and a spherical portion 20B integrally formed with the extending portion 19 of the adjacent clamp and integrated into the outer cylindrical portion 20A. Made up of

As described above, the spacer means 14 for setting the interval between the long underwater laid object bodies 16 can be relatively moved in the axial direction of the long underwater laid object body 16 by the connecting portion 20, and the plurality of Since it is possible to pivot with respect to each other in a horizontal plane perpendicular to the axis of the main body 16, even if the floating body 1 is pitched and rotated as shown in FIG. The long underwater laid object body 16 is damaged so that the underwater laid object body 16 is not restrained in the axial direction or the direction perpendicular to this axis line, so that no excessive bending load or torsional force is applied. Will not be done.

〔The invention's effect〕

According to the present invention, as described above, the spacer means sets the distance between each other so as to allow the axial movement of each of the fabric bodies and the pivoting in a horizontal plane perpendicular to the axial direction. Can absorb excessive bending loads and torsional forces applied to adjacent fabric objects due to the movement of the levitating body, thereby effectively preventing damage to the fabric objects. There is.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a laid state of a long underwater laid object, FIG.
FIG. 3 and FIG. 3 are a front view and a sectional view taken along the line AA of FIG. 1 ... Floating body, 10 ... Long underwater laid object, 14 ... Spacer means, 16 ... Long underwater laid object body, 18 ... Clamp, 20 ...
Connection.

Claims (1)

(57) [Claims] A long underwater laid object comprising a plurality of long underwater laid object bodies suspended in water from a floating body on the water surface and held at a distance from each other by a spacer means,
The spacer means can relatively move a clamp held by each long underwater laid object main body and an adjacent clamp in a direction parallel to the axis of the long underwater laid object main body, and the plurality of long underwater A long underwater fabric comprising: a connecting portion slidably engaged with each other so as to be capable of pivoting with each other in a horizontal plane perpendicular to the axis of the fabric body.