Patent ID: 7490673

Claim:
A subsea completion system which includes: a wellhead which is positioned at the upper end of a well bore and comprises a first upper connection interface; a tree which is positioned above the wellhead and comprises a second upper connection interface; a lower riser package (“LRP”) which is positioned above the tree and comprises a third upper connection interface; a tubing hanger which is positioned in the wellhead and comprises a fourth upper connection interface; a blowout preventor (“BOP”) which comprises a first lower connection interface that is operatively engageable with the first, second and third upper connection interfaces; and a tubing hanger running tool (“THRT”) which comprises a second lower connection interface that is operatively engageable with the second, third and fourth upper connection interfaces; wherein during a first stage of installation of the subsea completion system the BOP is connected to the wellhead and the THRT is connected to the tubing hanger; and wherein during a second stage of installation of the subsea completion system the tree, with the LRP connected to the top thereof, is connected to the wellhead and both the BOP and the THRT are connected to the LRP.