Abstract: An earth drilling apparatus is disclosed herein. The earth drilling apparatus includes an exterior conduit. The earth drilling apparatus also includes an inner barrel positionable within the exterior conduit. The earth drilling apparatus also includes a drill bit releasibly engaged with the exterior conduit. The earth drilling apparatus also includes a liner for retaining samples of earth and positionable within the inner barrel. The earth drilling apparatus also includes a shoe releasibly engaged with the inner barrel at a mounting location to selectively retain the liner in place. The earth drilling apparatus also includes a wiper mountable on the inner barrel at the mounting location when the shoe is removed. The wiper is operable to wipe the liner as the liner is removed from the inner barrel.