Fmc Technologies, Inc.

Alasdair MacFarlane

Gavin Reilly

Richard D Kent

Nicholas Gatherar

A subsea wellhead ( ) includes annulus pressure monitoring and bleed down ports ( ) whereby excessive pressure may be detected and bled off to a production controls or workover controls system via an electro/hydraulic jumper ( ). A valve block ( ) bolted to the wellhead ( ) includes pressure transducers ( ) and isolation valves ( ). Excessive annulus pressures and hence damage to the completion program may thereby be avoided in HPHT subsea well applications.

Subsea completion annulus monitoring and bleed down system

A completion component such as a tubing hanger includes a lockdown mechanism with an actuating mandrel that includes a positively acting anti-backout mechanism, which can be remotely deployed. The mechanism comprises a tooth on an inwardly biased retention ring carried by the mandrel, and positively engageable with a corresponding profile on the tubing hanger. Detent pins are outwardly biased by a tubing hanger running tool latch piston to hold the tooth and profile out of engagement during installation of the tubing hanger and setting of the actuating mandrel.

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Denny, United Kingdom

Alasdair MacFarlane