Visual positioning and guidance method for submarine umbilical management

Abstract

A visual positioning and guidance method for submarine umbilical management. The equipment used in this method is composed of a surface positioning part and an underwater positioning part. The steps to realize the method are: firstly, install the equipment, and then guide the operation ship to tow to the submarine umbilical management In the sea area, side-scan sonar scanning is carried out on the route of the pipeline management section to obtain the precise position coordinates and status of the pipeline before the flexible pad is laid; then the underwater acoustic positioning system is installed and calibrated, and the surface positioning and guidance system guides the operation ship to After installing the underwater equipment, carry out hoisting operations to complete the laying of flexible cushions. The visual positioning guidance method system has high positioning accuracy, and can realize three-dimensional visual real-time positioning, the whole process of flexible pad and hanger lowering process and motion track recording, flexible pad and hanger underwater automatic detachment, and real-time display capability of virtual reality scene ; It also has many advantages such as intuition, safety, efficiency, reliability, real-time, and fault tolerance.

Description

[0001] 1. Technical field [0002] The invention relates to a visual positioning and guiding method for submarine umbilical management, in particular to a visual positioning and guiding method for submarine umbilical management for laying flexible cushions. [0003] 2. Background technology [0004] The submarine umbilical cable is the infrastructure for the development of offshore oil and gas fields. Its main function is to ensure that the crude oil, natural gas, water and other media and power and communication cables of the fixed oil production (gas production) platform in the offshore oil field are on the platform, the land terminal processing plant and the oil field platform. mutual transmission between them. In order to ensure the safe and reliable operation of submarine umbilicals and ensure the normal production of oil fields, submarine umbilicals are usually buried under the seabed with a depth of more than 1.5 meters. Due to the long-term scouring of the bottom flow ...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: first, divers are required to operate underwater, and the operation risk is high; second, the operation time is poor, and it takes time for the floating crane to anchor in place, and it takes 4 to 5 hours for the four anchors to be positioned, and the diving operation is limited by the tide at the same time , can’t work at night; third, the operation cost is high, and the whole operation requires barge inversion, anchor boat anchoring and diving support; fourth, the operation procedure is complicated, and multi-department cooperation is required