Decentralization system and devolution method of deep sea operation equipment

Abstract

The application discloses an unwinding system and an unwinding method for deep sea operation equipment. The unwinding system for the deep sea operation equipment comprises a water surface working vessel, the deep sea operation equipment, a lifting rope for connecting the water surface working vessel and the deep sea operation equipment, and a connecting pipe cable for connecting the water surfaceworking vessel and the deep sea operation equipment, wherein the lifting rope is connected to the gravity position of the deep sea operation equipment; moreover, the lifting rope is made of a fibre material; the connecting pipe cable is connected to the tail of the deep sea operation equipment; a plurality of pipe cable clamps which are arranged in the length direction of the connecting pipe cableare fixedly arranged on the connecting pipe cable; each pipe cable clamp is arranged out of the lifting rope in a sliding and sleeving manner; and a buoyancy part is fixedly arranged on the connecting pipe cable between adjacent two pipe cable clamps. According to the unwinding system and the unwinding method for the deep sea operation equipment, the problem of dislocation or plastic deformationof inner and outer structures of the pipe cable can be avoided.

Description

technical field [0001] The present application relates to the technical field of deep sea operation, and in particular to a lowering system and lowering method of deep sea operation equipment. Background technique [0002] The deployment of deep-sea operation equipment is different from the deployment of underwater single equipment based on underwater production systems. The release of single underwater equipment based on the underwater production system is to release only the massive underwater equipment itself, and its umbilical system is to be connected to other underwater equipment in the underwater production system after the single equipment is lowered to the seabed. It will not be directly connected to the surface facilities through pipe cables; but the deep-sea operation equipment does not need a production system composed of many underwater equipment during operation, and can complete the operation task only by relying on a centrifugal pump or adding an underwater m...

AI Technical Summary

Problems solved by technology

[0004] First, the length of the connecting umbilical cable in the deep sea is relatively long, and under the tension of the connecting umbilical cable, the axial resonance frequency of the lowering system will be close to the frequency of the wave action, resulting in axial resonance of the lowering system and further damage to the strength of the lowering system;

[0005] Second, due to the difference in tensile stiffness between the internal and external components of the connecting umbilical, serious misalignment or plastic deformation of the internal and external components of the umbilical may occur, especially in deep or ultra-deep water operations, where the misalignment or plastic deformation will More obviously, this may directly cause plastic deformation of the internal components of the umbilical cable, changes in physical properties, and functional failure or even fracture

[0006] Third, at present, the design and production of cables or flexible pipes pay more attention to the bending stiffness and fatigue characteristics, and less attention is paid to their tensile stiffness or strength characteristics. Another Reason Deep Sea Equipment Is Unreliable

Images