Wiktionary
n. (context drilling English) A hole, very deep but only a few inches wide, which is used to drop explosives beneath the Earth's surface to ease petroleum extraction.
Usage examples of "shothole".
Shining brightly in through the large high windows of the warehouse, the morning sun lit up countless squadrons of the intermingled wasps, flies, vrills, grates, snurks, hornets, gnats, shothole beetles and other pests, that drifted and darted through rolling clouds of this latest insecticide.
The carpenter had only four shotholes and eight inches of water in the well: Fellowes gave an account of a fair amount of damage to the sails and rigging forward.
There was the swaying up of the new yard, too, some shotholes to be repaired and the bowsprit to be new gammoned, for the strangest grazing ricochet had cut half the turns without ever touching the wood - something the oldest seamen aboard had never yet beheld, a wonder to be recorded in the log.