noun A gadget or unspecified device, in various industries. A weight which is dropped into a bore, as of an oil well, to explode a cartridge previously lowered. A device, such as a loosely fitted plug, which is driven through a pipe by the pressure of the contents behind the plug to clear away obstructions. A rough sled or dray used for dragging or hauling loads.
noun A weight which is dropped into a bore, as of an oil well, to explode a cartridge previously lowered.
noun A device, such as a loosely fitted plug, which is driven through a pipe by the pressure of the contents behind the plug to clear away obstructions.
noun A rough sled or dray used for dragging or hauling loads.