| 摘要 |
<p>A production string (6) with flexible electrical and/or hydraulic cables (7) extending along it is lowered into a well through a blow-out preventer (1) on the seabed (2), and is formed by screwing together pipe lengths. The blow-out preventer (1) has an enveloping pipe ram (4) with an elastic valve element (5) which, when pressurized, expands to envelop the production string (6) at a preselected point. A core pipe (9) is spliced into the production string (6) at a preselected depth by means of threaded connections at its ends. A protective sleeve (10) for the cables is attached to and around the core pipe, forming an annular space (15) through which link pipes (16) extend between the end elements (11, 11). The outlet ends of the link pipes (16) have pressure couplings (17) or blind plugs in unused holes. Support rings (18) prevent the collapse of the protective sleeve (10) under pressure.</p> |
