Repair of offshore pipelines of underwater hydrocarbon production systems

Abstract

Introduction. As with any structure, there may be a need for repairs during operation for a wide range of reasons, including as a result of both internal and external influences (trawl, etc.).
Aim. To propose a new method, alternative to the traditional one (the pipeline is welded above the water surface and then put down to the bottom being curved) for repairing an underwater marine pipeline damaged to the point of complete rupture of the pipe, provided that both ends of the pipeline can be raised above the water surface at the point of damage.
Materials and methods. Analysis of existing solutions, estimates, expert assessments
Results. A method for repairing underwater pipelines without welding under water surface, based on a flange connection, is proposed.
Conclusion. Conducting preliminary studies have shown the real feasibility of the proposed method. However, given that it is being used for the first time, detailed clarification of individual solutions is required.