This split Unihead system provides time savings that drastically reduce rig costs, allowing you to maximize the productivity of your drilling operation. It maintains well control from the reduction of BOP nipple up and down times, and is commonly utilized for 13- 5/8" surface, 9- 5/8" intermediate, and 4- 1/2" production casing, with a compact design that addresses your sub-structure space constraints. Designed for quick and simple installation, the UH-WB wellhead allows you to make up 2-4 strings of casing without removing the BOP, optimizing mandrel hangers. Though this wellhead is comprised of 2 or more drilling spools, they are made up as a single unit, permitting the drilling of two or more phases at the same time - while using only 10 hours of time per stage.