A three-node pipe collar type j-laying system

Abstract

The invention aims at providing a three-joint pipe collar type J-lay system. The system comprises a laying tower, hydraulic angle adjusting systems, loading arms, a horizontal conveying system and a moving platform, the bottom of the laying tower is hinged to a deck of a ship body, a winch and an elevator are mounted at the top of the laying tower, the moving platform is mounted below the laying tower, each hydraulic angle adjusting system comprises an upper support rod segment, a lower support rod segment and hydraulic cylinders, the upper end of each upper support rod segment is connected with the laying tower through a connecting shaft, the lower end of each lower support rod segment is hinged to the deck of the ship body, cylinder bodies of the hydraulic cylinders are connected with the lower ends of the upper support rod segments, pistons of the hydraulic cylinders are connected with the lower ends of the lower support rod segments, the lower ends of the loading arms are hinged to the deck of the ship body, the upper ends of the loading arms are provided with hydraulic clamps, the hydraulic clamps are connected with the loading arms through connecting rotary shafts, the two sides of each loading arm are provided with lifting lugs, and the lifting lugs are connected with the winch through steel cables. By means of the three-joint pipe collar type J-lay system, high laying capability is achieved, and mounting of certain key equipment can be completed.

Description

technical field [0001] The invention relates to deep-water pipe-laying equipment for submarine pipelines or standpipes. Background technique [0002] With the large-scale development of the world's offshore oil, the demand for deep-water lifting and pipe-laying vessels is increasing. As the world's offshore oil continues to develop into deep water, the technical requirements for deep water pipeline laying are also getting higher and higher. The rapid development of the world's offshore oil industry has promoted the rapid development of deep-water pipe-laying technology, and also led to the rapid development of crane pipe-laying vessel equipment. At present, in deep water projects, there are three main laying methods of pipelines: S-laying, reel laying and J-laying. J-shaped laying is a new pipe-laying method. When the riser is lowered, it passes through the laying tower, leaves the pipe-laying vessel in an approximately vertical state, and is lowered to the seabed. After t...

AI Technical Summary

Problems solved by technology

[0004] 1. Low laying efficiency

Since the riser needs to complete the work of welding-non-destructive testing-coating-down on the laying tower during the J-type laying process, and these processes cannot be carried out simultaneously, and are limited by the number of equipment, the typical J-type laying speed is 1-1.5 km / day, resulting in higher riser installation costs

[0005] 2. When laying the tower, all operations are carried out in the vertical direction. Due to the high height and heavy weight, and it is generally arranged at the bow or stern of the pipe-laying ship, stability is a problem

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