Fast drop inner tube head assembly and system

An inner tube head assembly for a core barrel assembly having a latch casing coupled to a latch body, a landing shoulder coupled to the latch body and a spindle, and an inner tube cap assembly coupled between the spindle and an inner tube cap adapter. The landing shoulder and the inner tube cap adapter are a first size. The latch casing, the latch body, the spindle, and the inner tube cap assembly are a second size. The inner tube head assembly includes latches configured to work with the inner tube head assembly of the first size and the drill string of the second size. The first size is larger than the second size. The inner tube head assembly engages a drill string sized to cooperate with the first size. A core drilling system is also described.