Ship type of semi-submersible crane pipe-laying vessel

Abstract

The invention relates to a ship form for a semi-submersible type hoisting pipe-laying ship. A ship body comprises an upper platform, a plurality of upright columns and two lower floaters, wherein the upright columns are fixed at the two sides under the upper platform and are arrayed in parallel; the lower floaters are fixed at two sides, are arrayed in parallel and are connected to the upright columns; and a crane is fixed on the tail part of the upper platform. The ship form is characterized in that a centrum structure expanding outwards from bottom to top is formed by the joints of the upper parts of the upright columns on the stem and the upper platform; the outer sides of the lower edges of the upright columns are matched with the deck molded lines of the lower floaters; the upper sides of the upper edges of the upright columns are aligned with the side boundaries of the upper platform; the joints between the bottoms of the upright columns and the lower floaters are in bulbous bow arch-shaped natural transition; and after being connected in such a manner, the ship form of the stem is of a streamline structure. The ship form for the semi-submersible type hoisting pipe-laying ship can be used for maximally reducing the water resistance and improving the routing speed of the pipe-laying ship under the condition of ensuring the structural strength and buoyancy of the ship body.

Description

technical field [0001] The invention relates to a pipe-laying ship, in particular to a ship type of a semi-submersible lifting pipe-laying ship. It belongs to the field of offshore oil engineering. Background technique [0002] In offshore oil development projects, usually, submarine pipelines are laid between oil production platforms or between oil production platforms and land, and oil and gas are transported through submarine pipelines. Submarine pipeline laying is an important part of the development and construction of deep sea oil and gas fields, and plays a very important role in the development, production and product export of offshore oil and gas fields. [0003] The laying of submarine pipelines is usually carried out on pipe-laying engineering ships. From the hull type, it can be roughly divided into: barge type, ordinary ship type and semi-submersible type. [0004] Compared with other types of pipe-laying ships, barge-type pipe-laying ships are relatively les...

AI Technical Summary

Problems solved by technology

[0009] Since the cross-section of the column 2 of the existing semi-submersible lifting pipe-laying ship is mostly rectangular or the bottom is rectangular, the upper part is close to the connection with the upper platform 1 and expands outward into a trapezoid, which is formed by connecting the lower floating body 3 and the upper platform 1 The bow of the ship is also trapezoidal. Although the reserve buoyancy is ensured, due to the relatively large length of the column 2 itself, it is difficult to ensure the rapidity of the pipe-laying vessel when sailing due to the relatively large resistance of the water flow.

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