go-devil

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A logging sled.
• noun A railway handcar.
• noun A jointed tool for cleaning an oil pipeline and disengaging obstructions.
• noun An iron dart dropped into an oil well to explode a charge of dynamite.

from The Century Dictionary.

• noun A device for exploding a dynamite cartridge in an oil-well. See the extract.
• noun A movable-jointed contractible apparatus, with interior springs secured to iron plates in overlapping sections, something like an elongated cartridge in shape and about three feet long, introduced into a pipe-line for the purpose of freeing it from obstructions.
• noun A rough sled used for holding one end of a log in hauling it out of the woods, etc., the other end dragging on the snow or ice. Also called tieboy.

from the GNU version of the Collaborative International Dictionary of English.

• noun Local, U. S., Local, U. S. A weight which is dropped into a bore, as of an oil well, to explode a cartridge previously lowered.
• noun Local, U. S., Local, U. S. A device, 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 Local, U. S. A rough sled or dray used for dragging logs, hauling stone, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun this sense?) (US, colloquial) A gadget or unspecified device as used in various industries.