Internally latched subsea wellhead tieback connector

Details Internally latched subsea wellhead tieback connector Internally latched subsea wellhead tieback connector

1996-11-13

1998-07-07

Dang, Hoang C.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166359, 285 39, 285315, E21B 43013

Patent

active

057754276

ABSTRACT:
A subsea wellhead tieback connector operatively used to connect to a marine riser pipe or a well conductor in a manner that that will not unthread or unloosen the joints of the riser pipe being unlocked. The tieback connector operates with a novel internal latching mechanism having a hydraulic piston, an inner body that stretches and deflects in a unique manner resulting in compression spring forces at two locations, an expanding lock ring, a threaded adjustment ring, and a reaction ring. During operation the tieback connector creates an enhanced mechanical advantage to originate a required pre-load force without the necessity of having to generate a large hydraulic force that would otherwise be needed.

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