Casing Cup Tester is mainly used for the pressure test on the casing string and blowout preventer stack. All of the oil (gas and water) well has been running in hole with casing and has been installing the mouth of wellhead equipment, to test pressure delamination one—off for casing and control blowout pressure system, also can be used to test pressure for casing at well site pipe yard. Test pressure very easy, provided the test pressure tool put in the casing.