Hydraulic control underwater pipeline horizontal docking and locking device and docking and locking method thereof

Abstract

The invention discloses a hydraulic control underwater pipeline horizontal docking and locking device and a docking and locking method thereof. The device comprises a locking mechanism, a propelling mechanism and a support mechanism. The locking mechanism comprises a connecting body and a locking device, and the locking device is controlled by hydraulic pressure and can lock or loosen docked pipe joints. The propelling mechanism comprises a pipe joint and a pipe joint outer barrel, at least two sealing cavities can be formed between the outer wall of the pipe joint and the inner wall of the outer barrel, and hydraulic pressure is added into the sealing cavities so that the pipe joint can move to be docked with the connecting body. The support mechanism comprises a support and a clamping supporting base, the clamping supporting base is arranged on the support, the propelling mechanism is lowered to fall into water and can be combined on the clamping supporting base, and accordingly the accurate position of the propelling mechanism can be guaranteed. By the adoption of the device and method, all the mounting processes of the pipe joint can be accurately achieved, so that pipeline docking reliability is guaranteed, and the adverse impact of environmental factors of the outside is reduced.

Description

technical field [0001] The invention relates to the oil drilling industry, in particular to a hydraulically controlled underwater pipeline horizontal docking and locking device. Background technique [0002] At present, the horizontal docking of the underwater tree pipeline and the pipeline basically includes three steps, namely, the step of hoisting and lowering the horizontal pipeline, the step of hoisting and approaching the connecting body, and the step of locking with the connecting body after connection. For these three steps, the prior art is to hoist the horizontal butt joint pipeline into deep water, and move the horizontal pipeline to the direction of the connecting body by the hoist, and the butt joint operation is directly completed during the hoisting process of the pipeline; During the hoisting and moving process, the pipeline is easily shaken and tilted by factors such as the hull, undercurrent, and the machine itself in the water, and it is difficult to accur...

AI Technical Summary

Problems solved by technology

For these three steps, the prior art is to hoist the horizontal butt joint pipeline into deep water, and move the horizontal pipeline to the direction of the connecting body by the hoist, and the butt joint operation is directly completed during the hoisting process of the pipeline; During the hoisting and moving process, the pipeline is easily shaken and tilted by factors such as the hull, undercurrent, and the machine itself in the water, and it is difficult to accurately lower it to the correct docking position, resulting in low docking accuracy and prone to bumping and damage to the metal sealing ring and other components, which affect the butt sealing performance and the success rate of butt joint

[0003] At the same time, the butt joint method usually used in the prior art is flange to flange joint, and the general joint task is completed by the underwater manipulator diving into the bottom of the water. The manipulator tightens the bolts to realize the locking operation after docking. Due to the influence of the depth of seawater operation, it is also a very difficult task for the manipulator; not only to find the position of the bolts, but also to adjust the tightening degree. The control is completed by the underwater manipulator, but its working process is complicated, and it greatly increases the working time and cost of locking

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