| 摘要 |
<p>A tension frame 2 for use with a riser system is installed on a well control unit 5 atop at least one riser 9 in said riser system. The frame 2 is adapted to receive a pressure control unit and hold it in line with the centre of the riser. The tension frame 2 houses at least two pre-installed pressure control equipment units 3, 4 of which one at a time is adapted to be held at an active position, in which the unit 3 is in line with the centre of the riser 9, and the other is adapted to be kept in a parked position within the frame 2. The pressure control units 3, 4 may be wireline pressure control unit and a coiled tubing pressure control unit.</p> |
