| 摘要 |
A method of testing the through cut 14 of a pipeline 10 comprises at least the steps of transmitting an electromagnetic signal 32a, 32b, along the pipeline and interpreting received signal(s) to test for the through cut of the pipeline. In this way, a non-invasive signal can be passed along the pipeline and the reflected signals can be interpreted and analysed based on one or more characteristics of the received signals to ascertain the change in the conductivity of the pipeline due to the cutting thereof, in particular when or whether the cutting of the pipeline is complete. The method is particularly suitable where access to the location of the cut of the pipeline is difficult or not accessible. Such pipelines include underwater, below seabed or below the mud line pipelines and may be hydrocarbon conductors such as oil drilling conductors. Cutting and removal of pipelines is required for decommissioning of offshore platforms. |
