Active heave compensation device for releasing and assembling deep sea winch

Abstract

The invention provides an active heave compensation device for releasing and assembling a deep sea winch. The device comprises a movable pulley, a movable pulley mounting bracket, a piston rod, a hydraulic cylinder, a fixed pulley mounting bracket and a fixed pulley, wherein a piston is arranged on the piston rod, and is embedded in a hydraulic cylinder body, so that the piston and the inner wall of the hydraulic cylinder body are sealed through hydraulic oil to form a hydraulic execution mechanism; the movable pulley is arranged on the movable pulley mounting bracket, and the movable pulley mounting bracket is connected with one end, away from the piston, of the piston rod; and the fixed pulley is arranged on the fixed pulley mounting bracket, and the fixed pulley mounting bracket is connected with the bottom of the hydraulic cylinder. By utilizing the device, the up-and-down movement of underwater equipment caused by the fact that a vessel body moves up and down along with waves in a deep sea releasing and assembling process can be compensated, the constant tension of ropes connected with underwater production facilities can be maintained, and the stability and safety of releasing and assembly can be ensured.

Description

technical field [0001] The invention relates to an active heave compensation device for deep-water winch lowering installation which compensates for the heave motion of the hull during the lowering installation process of the deep water winch and ensures the stability and safety of the lowering installation process of the winch. Background technique [0002] With the development of my country's offshore oil industry, offshore oil and gas exploration and development have moved from shallow seas to deep seas, even ultra-deep seas, and the difficulty of deep sea construction has also increased. In the process of deep sea construction, the hull floats on the fluctuating sea surface, and the hull will inevitably produce heave and sink movements on the sea surface. This heave movement of the hull will have a great impact on the installation and construction in deep water, and even cause Lead to the failure of the decentralized installation and construction work. Therefore, it is ...

AI Technical Summary

Problems solved by technology

However, the heave compensation systems studied above are mostly used for drilling, cranes, etc., and are rarely used for underwater production facilities lowered by winches, and they must be suitable for lowering 1500m water depth and lowering capacity of 420t. In addition, offshore The harsh environmental conditions make it more difficult and challenging to design active heave compensation devices

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