Patent ID: 7063157
Filing Date: 2006-06-20
Classification: E21B

Abstract:
1. A method for installing a subsea completion system comprising a conductor housing which is positioned on the sea floor, a wellhead which is landed in the conductor housing, at least one casing hanger which is connected to a corresponding casing string, a tubing hanger which is connected to a production tubing string and which includes at least one tubing hanger production bore, and a christmas tree which is installed over the wellhead and which includes at least one production bore, the method comprising the steps of: (a) installing the conductor housing on the sea floor; (b) landing the wellhead in the conductor housing; (c) securing a blowout preventer (BOP) to the wellhead; (d) landing the casing hanger in the wellhead through the BOP; (e) connecting the tubing hanger to a tubing hanger running tool (THRT); (f) landing the tubing hanger in the wellhead or the casing hanger through the BOP; (g) installing a wireline plug in the tubing hanger production bore through the THRT; (h) retrieving the THRT; (i) retrieving the BOP; (j) securing an ROV operated subsea lubricator (ROSL) to the christmas tree; (k) landing the christmas tree on the wellhead; and (I) retrieving the wireline plug from the tubing hanger production bore using the ROSL.