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METHOD AND DEVICE FOR TESTING THE COATING OF A PIPELINE WHILE LAYING THE PIPELINE IN A LIQUID-FILLED BOREHOLE
METHOD AND DEVICE FOR TESTING THE COATING OF A PIPELINE WHILE LAYING THE PIPELINE IN A LIQUID-FILLED BOREHOLE
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机译:在液体钻孔中铺设管道时测试管道涂层的方法和设备
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摘要
In a method and associated devices for testing the coating of a pipeline while the pipeline is laid in a liquid-filled borehole, the pressure of an advancing device (1) is transmitted to a drill head (4) via a pipeline (2) and an electrically non-conductive insulating coupling (3), and the control and supply wires (9) for the drill head (3) are guided and/or designed within the pipeline (2) in such a way that the control and supply wires (9) allow no electrical contact between the drill head (3) and the ground (12) with the pipeline (2), and the integrity of the coating (7) of the pipeline (2) that is surrounded by a liquid (6) in the borehole (5) is verified during the laying process of the pipeline (2) by means of a measuring apparatus (8).
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