Deepwater pipeline tie-back pose measuring device

Abstract

The invention provides a deepwater pipeline tie-back pose measuring device. The deepwater pipeline tie-back pose measuring device is composed of a measuring device (I), a measuring device (II) and an auxiliary measuring steel wire rope (3). The structure of the measuring device (I) mainly comprises an orthogonal inclination angle measuring mechanism, a flange butt joint mechanism and a pitching and horizontal swing angle measuring mechanism. The structure of the measuring device (II) mainly comprises an orthogonal inclination angle measuring mechanism, a flange butt joint mechanism, a rope length detecting mechanism and a pitching and horizontal swing angle measuring mechanism. By designing the corresponding butt joint mechanism, flange end face positioning and flange outer circle clamping are fully utilized, the axial positioning precision is improved, and therefore the distance between the flange end face and the stretching-out position point of the measuring rope is changed into a fixed value from an unknown quantity. According to the invention, the leading-out site of the steel wire rope in the measuring device is adjusted to the extension line of the central axis of the corresponding measured pipeline, so that the solving process is simplified on the basis of the transition matrix algorithm.

Description

technical field [0001] The invention relates to a deep-water pipeline tie-back posture measurement device, which is a measuring device for measuring the relative distance and angle between pipelines during the deep-sea pipeline tie-back operation, and belongs to the field of deep-water measurement operation equipment. Background technique [0002] With the vigorous development of the economy, the demand for oil and gas resources in various countries is increasing day by day. In recent years, due to the dwindling land resources, all countries have focused on the development of oil and gas resources in the deep sea. Among the oil and gas fields with proven reserves of more than 100 million tons in the past 10 years, offshore oil and gas fields account for about 60%, and half of them are located in sea areas with a water depth of more than 500m. Therefore, deep-sea oil and gas exploitation equipment and technology have also become a research and development hotspot in the inte...

AI Technical Summary

Problems solved by technology

Therefore, on the one hand, it is necessary to design a special base and a docking joint to complete the docking of the underwater measurement device and the pipeline, which leads to a longer ROV underwater operation cycle and increases the difficulty of the operation

On the other hand, the harsh environment of the seabed leads to the inevitable corrosion of the pipeline, which affects the reliability of the base connection and thus affects the measurement accuracy

In addition, due to the docking structure, the protruding point of the measuring rope is not on the extension line of the center line of the measured pipeline. Therefore, to a certain extent, the difficulty and calculation amount of the solution are increased, and the measurement problem will inevitably be caused when the solution is solved by the host computer. accumulation of errors and uncertainties;

[0006] 2. The measuring device is not designed with a corresponding axial positioning mechanism, that is, the distance between the actual docking base and the flange end face is unknown

Through the analysis of the transition matrix solution algorithm, it can be obtained that although the offset value between the base and the end face of the flange is smaller than the distance between the two flanges, it is not conducive to the control of errors and uncertainties

Since the relevant literature does not discuss the solution to the offset, and it is difficult to install with bolt holes in the actual deep-water survey operation, the offset is unavoidable and cannot be measured accurately, and structural improvement and optimization are required

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