Seal assembly
A seal assembly for sealing an annular space between an inner and an outer pipe in a double-walled subsea pipeline which seal assembly comprises an annular member and moveable blocking means and: (a) under normal operating conditions is in a non-sealing position which allows the passage of a gas thr...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A seal assembly for sealing an annular space between an inner and an outer pipe in a double-walled subsea pipeline which seal assembly comprises an annular member and moveable blocking means and: (a) under normal operating conditions is in a non-sealing position which allows the passage of a gas through said seal assembly; and (b) is actuatable from a non-sealing position to a sealing position in response to the entry of liquid into said annular space. |
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