B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
61/4.6
B65H 59/00 (2006.01) F17D 5/00 (2006.01) G02B 6/44 (2006.01) G02B 6/50 (2006.01) H02G 1/08 (2006.01)
Patent
CA 1304946
ABSTRACT A method of deploying a cable or other line in a fluid transportation pipeline whilst in normal operation full of and transporting a fluid under a positive pressure. A collapsible centralising device is attached to the loading end of the cable and is then fed in a collapsed state into the pipeline via a first fluid scaling means at the cable entry position. That device maintains the cable end centralised in the pipeline cross section whilst the cable is fed into the pipeline. Magnetic sensing means disposed near the cable exit position sense the presence of the cable end and control the cable infeed so as to position the cable end in a predetermined cable retrieval position. A tubular lance is fed into the pipeline through a second fluid scaling means disposed at the cable exit position, and a grab housed in the nozzle of the lance is ejected to engage and capture part of the centralising device and cable end, whereafter the grab closes on being drawn back into the lance. The lance is then withdrawn through the second fluid scaling means so as to draw with it the grab and the captured centralising device and cable end. Refers: Figure 2.
568638
Baskett Ralph Edward John
Grocott Geoffrey J.
Gowling Lafleur Henderson Llp
Nortel Networks Limited
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