he Casing Spool is assembled to the top of the Casing Head. CASING SPOOL FUNCTIONS: Attaches above the Casing Head and seals off the next casing stringSupports the blowout preventer while drillingAllows for testing of the blowout preventerHousing for casing hanger and seal assemblySide outlets for annular accessMODELS AVAILABLE: C-22 (no lock screws), C-22-BP (two lock screws, 180deg apart), C-22-L (full lock screws)C-29 (no lock screws), C-29-BP (two lock screws, 180deg apart), C-29-L (full lock screws)