Device for lowering and mounting submarine pipeline and crossing pipeline

Abstract

The invention provides a device for lowering and mounting a submarine pipeline and a crossing pipeline. The device for lowering and mounting the submarine pipeline and the crossing pipeline is used for butting a submarine pipeline and a crossing pipeline, and comprises a support underframe (3), a pipeline clamp (1) for preliminarily centering the submarine pipeline, an upper support frame (2) and a pipeline clamping mechanism (4), wherein the pipeline clamp (1) is arranged on the support underframe (3) and is provided with a cavity (10) for accommodating the submarine pipeline; the upper support frame (2) is connected above the support underframe (3); the pipeline clamping mechanism (4) comprises a pipeline clamp (48) for clamping the crossing pipeline and a clamping hydraulic cylinder (46) which is connected with the pipeline clamp (48); the pipeline clamping mechanism (4) can move up and down and is connected to the upper support frame (2); and the pipeline clamp (48) can move back and forth and from side to side and is arranged on the upper support frame (2). By the device, the accuracy of lowering and mounting the submarine pipeline and the crossing pipeline is ensured.

Description

technical field [0001] The invention relates to a device for lowering and installing a submarine jumper pipeline, which is mainly used for lowering the jumper pipeline and docking with the submarine pipeline during the pipeline repair process, so as to ensure the precise docking and stable operation of the pipeline during the pipeline repair process. Background technique [0002] As the "artery" of offshore oil and gas engineering operations, submarine pipelines play a vital role. Therefore, after the occurrence of damage accidents such as leakage and corrosion of submarine pipelines, how to quickly repair submarine pipelines has become indispensable in offshore oil and gas operations. The missing link. When a section of submarine pipeline is seriously damaged or corroded, it is necessary to cut off this section of pipeline, and lower two jumper pipelines to connect with the remaining two ends of the submarine pipeline through the pipeline butt joint, and finally lower a sec...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a key device for lowering installation of seabed cross-over pipes. Its main function is to solve the inaccurate centering of pipes caused by external environmental factors such as waves and currents and the forced centering and two-way pipe connector damage. During the docking process of the section pipeline, it is impossible to provide the corresponding restraint carrier to support the smooth progress of the docking process, so as to ensure the stability and safety of the lowering and pipeline docking process

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