Position and orientation re-measurement method of fixed offshore platform

Abstract

The invention discloses an offshore fixed platform position and direction repetition measurement method. The method comprises the following steps: the offshore fixed platform position and direction repetition measurement is realized through selection of a satellite-based differential GPS antenna position, leading measurement of a direction reference line, power supply wire arrangement, equipment installation, position and direction measurement and processing of measurement data. The method is simple in application process, light in equipment weight, small in equipment volume, convenient for equipment carrying and simple in equipment installation, prevents repeated butt joint caused by errors, shortens the construction period, improves the working efficiency, and saves the cost. The system positioning precision is high; the position precision of 0.15 m and the navigation direction precision of 0.05 degree can be realized; and the method has such advantages as intuition, safety, reliability and timeliness.

Description

1. Technical field [0001] The invention relates to a method for measuring the position and orientation of an offshore fixed platform during installation, in particular to a re-measurement method for the position and orientation of an offshore fixed platform. 2. Background technology [0002] At present, the offshore oil equipment industry is in a new period of rapid development driven by the sustained and rapid development of the offshore oil and gas industry. The offshore oil and gas engineering equipment industry is a strategic industry that is directly related to the development of offshore oil and gas resources and affects national energy stability and economic security. Offshore oil and gas engineering equipment has become a new growth point of profit in the shipbuilding industry, and has become the target of major maritime countries. [0003] The docking and positioning of drilling platforms and fixed offshore platforms is a very important part of offshore oil and gas...

AI Technical Summary

Problems solved by technology

This method has the following deficiencies: First, the accuracy is low. Due to the error of equipment, installation and offshore fixed platforms during hoisting, the final measurement results often have large deviations; second, the cycle is long and dangerous. When the platform is installed, a crane is used to drive piles from the air to the sea. The installation position needs to be constantly calibrated. Personnel and equipment are located on the suspended platform for a long time, which has certain potential safety hazards.