Patent ID: 7143830

Claim:
A method for installing a subsea completion system over a well bore, the subsea completion system comprising a wellhead which is installed at an upper end of the well bore; a tubing hanger which comprises at least one tubing hanger bore, and a christmas tree which comprises at least one christmas tree bore, the method comprising the steps of: (a) landing the tubing hanger in the wellhead; (b) installing a plug in the tubing hanger bore; (c) providing a tree adapter which comprises a production bore and a valve for controlling flow through the production bore; (d) connecting the tree adapter to the christmas tree with the production bore in alignment with the christmas tree bore; (e) connecting the christmas tree to the wellhead with the christmas tree bore in alignment with the tubing hanger bore; (f) connecting a tubing hanger running tool (THRT) to the tree adapter; and (g) removing the plug from the tubing hanger bore through the THRT, the production bore and the christmas tree bore.