| 摘要 |
<p>A plurality of inflatable packers (24,26,28) on an offshore structure (12) are sequentially inflated using a control valve (10 min ) having a plurality of discharge ports (78,80,82,84,86,88) each connected to a respective packer for supplying inflating fluid thereto. A plurality of annuli on an offshore platform can be sequentially grouted using a similar control valve (10) with a plurality of discharge ports (56,58,60,62,64,66) each connected to a respective annulus for supplying grout thereto. A system employing both an inflation valve and a grout valve can be used, optionally with the same control pressure lines. The or each valve is controllable to open only one discharge port at a time.</p> |
