Subsea oil and gas pipeline detecting and locating apparatus and process

Abstract

The present invention discloses subsea oil and gas pipeline detecting and locating apparatus and process. The subsea oil and gas pipeline detecting and locating apparatus consists of an electrically driven creeping device, a creeping device controller, a high energy power source, an intelligent controller, a real-time locater, an ultrasonic acquiring processor, and an ultrasonic eddy flow detector connected through shaft couplings. The operation process includes the following steps: hose sweeping the pipeline and throwing the apparatus into the pipeline, moving the apparatus with the electrically driven creeping device under the control of the intelligent controller, detecting and locating the fault to be repaired, etc.

Description

technical field [0001] The invention relates to a device for detecting and locating a defect of a seabed oil and gas transmission pipeline, in particular to a method for discriminating and accurately locating a defect. Background technique [0002] There are abundant oil and gas resources in the Bohai Sea area of ​​my country and the shallow sea of ​​Shengli, Dagang and Liaohe Oilfields. The proven oil reserves are 3.1 billion tons. In the next few years, it is expected to form a production capacity of 21 million tons of oil, which will become the foundation of stable oil production in the east of my country. An important base, the scale of the submarine pipeline network is increasing day by day. Due to the instability of the subsea surface foundation, medium corrosion, ocean current washing and accidents at sea, pipelines are prone to defects and damages, and oil and gas leakage occurs, causing huge economic and ecological environmental protection losses. [0003] At presen...

AI Technical Summary

Problems solved by technology

However, the research on the detection technology applied to submarine pipelines is still blank in China, and the magnetic flux leakage or ultrasonic online detection devices at home and abroad are of one specification and can only be used for one pipe diameter, and cannot be applied to several pipe diameters; In terms of technology, my country currently has no suitable detection and positioning system and technology for submarine pipelines. Foreign technologies can only conduct online pipeline detection through oil pressure differential drive, and cannot accurately locate the detected pipeline defects. They can only use GIS for preliminary detection. Positioning, the positioning error is relatively large

Although the development speed of my country's offshore oil exploration and development is accelerating year by year, due to the particularity of the marine environment, the instability of the subsea surface foundation or the erosion of currents, the position of the subsea pipeline changes, and it is indeed difficult to establish a detailed and real-time GIS system as soon as possible.

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