Submarine pipe joint

Abstract

The invention discloses a submarine pipe joint which can reduce impact of a sea current on flexible pipes. The submarine pipe joint comprises two butting joints, wherein one joint is a rigid joint, and the other one is a flexible joint. The front end of the rigid joint is a sectioned hollow sphere, and the rear end of the rigid joint is tubular. At least two rollers are arranged on the side edge of the front end of the flexible joint, the flexible joint is located in the rigid joint, the rollers and the inner wall of the rigid joint are in sliding fit, and the rear part of the flexible joint is tubular. An elastic pipe is arranged between the end face of the front end of the flexible joint and a pipe mouth in the rigid joint, and both ends of the elastic pipe are respectively in contact with the end face of the front end of the flexible joint and the pipe mouth in the rigid joint. When the pipes are subject to outside force of the sea current, the flexible joint adaptively rotates or swings in the rigid joint, and the impact force of the sea current on the flexible pipe is reduced.

Description

technical field [0001] The invention relates to a pipe joint. Background technique [0002] With the continuous development and improvement of mining technology, there are more and more deep-sea oil and gas recovery operations in my country, which requires the production of oil and gas to be transported to the destination through pipelines. At present, the preferred transportation method is mainly to use flexible pipelines on the seabed, and rigid pipelines on the sea surface or shallow sea. This method has the characteristics of low cost and long service life, but there is a large difference in the rigidity of the pipes in the pipeline composed of these two kinds of pipes. Under the impact of seabed currents, the joint between the rigid pipe and the flexible pipe will cause a large impact. The traditional structure cannot absorb the impact energy of the sea current, so that the flexible pipe is prone to large deformation at the joint, and in severe cases, the flexible pipe...

AI Technical Summary

Problems solved by technology

This method has the characteristics of low cost and long service life, but there is a large difference in the rigidity of the pipes in the pipeline composed of these two kinds of pipes. Under the impact of seabed currents, the joint between the rigid pipe and the flexible pipe will cause a large impact. The traditional structure cannot absorb the impact energy of the sea current, so that the flexible pipe is prone to large deformation at the joint, and in severe cases, the flexible pipe will be damaged and cause oil leakage or air leakage.

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