Patent ID: 7051804

Claim:
A cap having a depth for covering an open upper end of a subsea structure, comprising: a base comprising a metal plate encapsulated in a thermoplastic polymer, said base having a size, after shrinkage, at least slightly larger than the exterior of the open upper end of the subsea structure; a body comprising a metal insert encapsulated in a thermoplastic polymer connected to and projecting downward from said base, said body having an open bottom; an inlet in said cap; a pipe inserted through an aperture in said base of said cap, wherein said pipe further comprises an outlet near the top of said pipe and wherein said pipe extends downwardly at least the depth of said cap; and wherein said cap is positioned over the open upper end of the subsea structure with said base of said cap resting on the open upper end of the subsea structure and said body of said cap forming a wall around the exterior of the open upper end of the subsea structure for inhibiting said cap from slipping off the open upper end of the subsea structure; and whereby a fluid may be inserted through said inlet into the open upper end of the subsea structure replacing seawater that flows up through said pipe and out of said cap through said outlet.