Section 2(1)(f) in The Oil Mines Regulations, 2017
(f)"blowout preventer" means a device attached above the well head-(i)to control pressure or to prevent uncontrolled escape of fluid from the annular space between tubing and casing or between drill pipe and casing or between wire line and tubing; or(ii)to shut-off the well if no drill pipe or tubing is in the hole; in case a kick or blowout occurs;