Wellhead capability to accept both a "heavy" casing program or a "light" casing program
Large sized Tubing Hanger add flexibility to completion design
Tree installation/removal is not required for work over operations
Security/safety during work over operations is improved as handling of heavy tree is avoided. BOP installation and test operations are performed without separating the tree
Work over operational time is reduced
Wells gathered in clusters make positioning of drilling and work over rigs easier and quicker