| 摘要 |
Apparatus for the monitoring of the fluid environment in a pipeline (14) is described comprising a pigging vehicle (1), within which are contained sensing means (5, 6 and 7) and a data logging device (3). The dimensions of the pigging vehicle (1) are such that its movement is not forced in a conventional manner along the pipeline (14), but instead the pigging vehicle (1) simply travels along under the influence of the production fluid (100). The pigging vehicle (1) further comprises a weight changing mechanism (9) that moves between a first and second condition. After a predetermined time, or after travelling a predetermined distance, the weight changing mechanism (9) may be activated so as to adjust the floatability of the device. By employing this monitoring apparatus advanced warnings of areas of a pipeline that are vulnerable to corrosion can be detected along with areas which have already degraded due to corrosion.
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