Marine pipe laying system method and hoisting device

A pipeline laying and submarine pipeline technology, which is applied in pipeline laying and maintenance, cranes, mechanical equipment, etc., can solve the problems of slow upward movement of moving blocks and limit the length of pipeline laying, and achieve the effect of saving time and reducing costs
CN100557284CActive Publication Date: 2009-11-04ITREC BV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ITREC BV
Publication Date
2009-11-04

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Abstract

The invention relates to marine pipe laying. For laying of an offshore pipeline, a system is used having a hoisting device (2). The hoisting device (2) comprises a tower (3) with a tower top side (3a) provided with cable pulleys (4). Furthermore the hoisting device (2) has a traveling block (5) which is displaceably attached to the tower (3). The traveling block (5) comprises a first block (51) and a second block (52), both provided with cable pulleys (6,7). The first block (51) is provided with a clamp (10) for holding a pipe section (20) to be connected to the pipeline (21) as well as for lowering the pipeline (21) after the pipe section (20) is connected to the pipeline (21). The hoisting device (2) has a hoisting cable (8) and a winch (9), the hoisting cable (8) being guided over the cable pulleys (4,6,7) on both the tower top side and the traveling block (5). The traveling block (5) is moveable with respect to the tower (3) by operation of the hoisting winch (9). The first block (51) and the second block (52) are adapted to be releasably coupled, in which coupled state they can travel along the tower (3) as a unit and are able to support the weight of the pipeline (21). The second block (52) can be locked to the tower (3), such that the first block (51) can travel along the tower (3) while the second block (52) remains stationary with respect to the tower (3).
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Description

technical field

[0001] The invention relates to an ocean pipeline laying system for laying a submarine pipeline, the system comprising:

[0002] a) main support structure;

[0003] b) the pipe connection station where the pipe section is connected to the uppermost end of the previous inlet pipe;

[0004] c) a fixing clip for releasably fastening the uppermost end of the previous water inlet pipe, wherein the fixing clip is suitable for supporting the load of the previous water inlet pipe;

[0005] d) Lifting equipment, said lifting equipment comprising:

[0006] - a tower with a tower top face provided with cable pulleys,

[0007] - a mobile block movably connected to the tower, provided with a cable pulley and a mobile clamp for clamping the pipe section to be connected to the pipe and lowering the pipe after the pipe section is connected to the pipe ,

[0008] - hoisting gear, comprising hoisting cables and winches, said hoisting cables being guided on sheaves above bot...

Claims

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