| 摘要 |
<p>A system (1) is described for intercepting and bypassing gases on a pressurised riser (2) composed of at least one shaped fitting (30) to be fastened to such riser (2), at least one valve element (50) adapted to cooperate with such shaped fitting (30), at least one pipe-drilling machine (70) adapted to drill such riser (2) through such valve element (50) and such shaped fitting (30) and to insert an internal plug into such shaped fitting (30), at least one bell (90) with visor adapted to cooperate with such valve element (50), at least one plugging device-carrying bell (110) adapted to cooperate with such valve element (50), at least one expansion-type plugging device (130) adapted to cooperate with such bell (110) and to plug such riser (2) through such bell (110), such valve element (50) and such shaped fitting (30). A process is further described for intercepting and bypassing gases on a riser (2) through the system (1).</p> |
