Figure F3. Schematic of L-CORK. The L-CORK is the same as the CORK-II, except a 10 cm ball valve is included on the wellhead (modified from Fisher, Wheat, et al.). These CORKs broaden the scope of possible sampling opportunities with capabilities for seafloor and subseafloor borehole sampling. Not all wellheads are the same. For example, the wellhead in Hole U1301B was extended. Wellheads with ball valves deployed during Expedition 327 have longer sampling bays, and the wellhead sampling bays deployed during Expedition 336 will be even longer. Photographs highlight various components shown in the schematic.
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