a. A long cylindrical vessel fitted with a bail at the upper end and a
flap or tongue valve at the lower extremity. It is used to remove water,
sand, and mud-laden or cuttings-laden fluids from a borehole. When fitted
with a plunger to which the bailing line is attached, it sucks the liquid
in as it is lifted and is then called a sand pump or an American pump.
b. A metal tank, or skip, with a valve in the bottom, used for dewatering
c. See: sludger; swab.
d. In bituminous coal mining, a laborer who scoops water from drainage
ditches in a mine with a bucket and empties it into a water car, a ditch
flowing to a natural outlet or to a pumping station. Also called water
e. A cylindrical steel container with a valve at the bottom for admission
of fluid, attached to a wire line and used in cable-tool drilling for
recovering and removing water, cuttings, and mud from the bottom of a
well. See also: bail; bailing. AGI
Dictionary of Mining, Mineral, and Related Terms