Subsea completion annulus monitoring and bleed down system
AssigneeFMC Technologies, Inc.
InventorsNicholas Gatherar, Alasdair MacFarlane, Gavin Reilly
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Abstract
A subsea wellhead (10) includes annulus pressure monitoring and bleed down ports (32, 34, 36) whereby excessive pressure may be detected and bled off to a production controls or workover controls system via an electro/hydraulic jumper (58). A valve block (44) bolted to the wellhead (10) includes pressure transducers (52, 54, 56) and isolation valves (46, 48, 50). Excessive annulus pressures and hence damage to the completion program may thereby be avoided in HPHT subsea well applications.
Claims10
A subsea wellhead (10) comprising a monitoring and/or bleed down port (32, 34, 36) having an interior end connected to a well annulus (26, 28, 30), characterised in that the port extends laterally through a wall of the wellhead housing and comprises an exterior end (82, 84, 86) connectable to a jumper (58) for conveying pressure signals and/or expelled annulus fluid to a controls interface.
A wellhead as defined in any preceding claim characterised in that the port comprises a valve block (44) attached to the wellhead.
A horizontal Christmas tree assembly comprising a wellhead as defined in any preceding claim.
Dependencies are inferred from the claim text.