Patent ID: 8689881
Filing Date: 2014-04-08
Classification: B63B,E02B,E21B

Abstract:
1. A method of installing a wellhead platform which includes a wellhead deck, sub-sea conductor frame and at least one conductor using an offshore unit which offshore unit includes: a hull and/or a deck frame; a mat attached to at least one connecting leg or a spud can attached to each of at least one connecting leg or to a lower hull attached to at least one connecting means, wherein the method includes the steps of: i) transporting the offshore unit to offshore installation site; ii) installing the offshore unit; iii) installing the at least one conductor through the wellhead deck and sub-sea conductor frame until the at least one conductor penetrates through soil layers to a target penetration; and iv) securing the wellhead deck to the at least one conductor; wherein the wellhead deck is removably attached to the hull and/or deck frame; wherein (a) where the offshore unit includes the mat, the sub-sea conductor frame is removably attached to the mat and (b) where the offshore unit includes the spud can, the sub-sea conductor frame is removably attached to the at least one connecting leg; wherein the wellhead deck and sub-sea conductor frame are attached to the offshore unit while loading out and transporting the offshore unit from a fabrication site to an offshore installation site; wherein the hull and/or deck frame and the mat or the spud can is connectable with the at least one connecting leg; and wherein the hull and/or deck frame and the lower hull is connectable with the at least one connecting means.