The UWS Multi-Bowl System is a wellhead assembly that provides a means to support and seal two casing strings, without the need to break the BOP stack. The assembly consists of 2 wellheads bolted together (Casing head and Casing spool). The lower section has a straight type bowl and a 45-degree load shoulder to support the lowermost casing string. The casing hanger is fluted to allow returns while cementing. A pack-off is installed creating a second load shoulder to support the next casing string. This pack-off incorporates seals to isolate the two casing strings and provide a means to test the wellhead seals. Emergency slip-type casing hangers are brought on all jobs in case the casing becomes stuck. Should this happen, the wellhead assembly is separated and the slip hanger is installed. The MBS System comes complete with a full array of rental tools. Wear bushings, running tools, standard and emergency casing hangers and pack-off support bushings, running tools for the casing hanger, pack-off, wash out tool and BOP test plugs.