Method of cutting and testing a pipeline cut under water or under a seabed

摘要

Disclosed is a method to determine whether a pipeline has been cut, the method including (a) transmitting an electromagnetic signal through the pipeline; (b) monitoring any reflected signal(s); and (c) interpreting the reflected signal to determine whether the pipeline has been cut.

主权项

1. A method of testing the through cut of a pipeline comprising at least the steps of:
(a) applying a cutting process to a region of a pipeline with a cutting tool deployed at a location to effect cutting of the pipeline at the region; (b) transmitting an electromagnetic signal through the region of the pipeline after the applying step; (c) monitoring any reflected signal resulting from the transmitting during the cutting process; and (d) interpreting the reflected signal to determine whether the pipeline is cut through before removing the cutting tool from the location,
wherein steps (b) and (c) are carried out in the pipeline using an in-line tool.