| 摘要 |
A pig 14 is used to lay cable 44 within a pipeline 10, wherein the pig carries an enclosure for a coil of cable which is laid behind the pig as it moves along the pipeline. The enclosure may be located within the pig body as shown (see also figures 2 and 3), or alternatively may be located on a rearward end of the pig body (see figures 4 and 5). In the latter case, the enclosure may be flexibly connected to the pig body, so that the pig and enclosure are articulated for use in a curved pipeline. The pig is preferably launched from a pig launcher 12, which may include an anchor 50 for the cable. This anchor may be used to connect the cable in the pipeline to external cabling 80 (see figure 6 for details). |
