Submarine pipeline detection apparatus and detection method thereof

Abstract

The invention relates to a submarine pipeline detection apparatus and a detection method thereof, and belongs to the technical fields of submarine pipeline routing, and external anticorrosive coating and the cathodic protection state detection. The apparatus comprises an underwater motion carrier, a perception device and a control terminal; the perception device is arranged on the underwater motion carrier; the control terminal is connected with the underwater motion carrier and the perception device; the underwater motion carrier adopts an underwater impeller propeller; the perception device comprises a pipeline routing detection probe, a potential measurement electrode, a lighting lamp, a camera, a pressure sensor and an attitude indicator; and the pipeline routing detection probe is arranged at the front end of a frame, the potential measurement electrode is arranged on the side elevation of the frame, the lamp and the camera are hoisted at the front end of the lower surface of the top plate of the frame, the pressure sensor is arranged in a sealed cabin, the probe contacts with seawater, and the attitude indicator is arranged on the flattened plane in the sealed cabin. The apparatus and the method have the advantages of no excavation in the detection process, long detection distance, accurate detection and low detection cost, and are suitable for the whole line detection of the submarine pipeline.

Description

technical field [0001] The invention relates to a detection device and a detection method of a submarine pipeline, and belongs to the technical field of detection of submarine pipeline routing, outer anti-corrosion layer and cathodic protection state. Background technique [0002] In recent years, with the continuous development of offshore oil, the number of submarine pipelines responsible for offshore oil and gas transportation has continued to increase, and failure accidents of submarine pipelines have also shown an increasing trend year by year. According to statistics, about 50% of the failure accidents of submarine pipelines are caused by corrosion, and the corresponding one is the corrosion detection of submarine pipelines—especially the single and backward technology of external corrosion detection methods. [0003] At present, the external inspection of submarine pipelines mainly focuses on routine inspections such as pipeline routing, suspension spans, and surround...

AI Technical Summary

Problems solved by technology

According to statistics, about 50% of the failure accidents of submarine pipelines are caused by corrosion, and the corresponding one is the corrosion detection of submarine pipelines—especially the single and backward technology of external corrosion detection methods

[0003] At present, the external inspection of submarine pipelines mainly focuses on routine inspections such as pipeline routing, suspension spans, and surrounding support conditions. Corrosion information such as the external anti-corrosion layer and cathodic protection status of submarine pipelines is only obtained by underwater inspections by divers. Mostly buried in submarine pipe trenches, diver detection is not suitable for full-line detection of submarine pipelines, and is also subject to sea conditions, water depth, seasons and other conditions

The lack of external corrosion detection technology for submarine pipelines has become a technical barrier affecting the safe operation of submarine pipelines

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