SHOTHOLE DRILL

Domain	Definition
Mining	A. Generally, a rotary percussion or auger type drill for making shotholes for blasting. b. Drills for shotholes are of two general types: (1) the rotary drill and (2) the churn drill. Rotary drill methods can be subdivided into (1) mechanical feed and (2) hydraulic feed. Both types provide a means for rotating the pipe, and both make provisions for circulating fluid down through the pipe, thus washing the cuttings away from the bit and conveying them up to the surface in the annular space between the wall of the hole and the string of drill pipe. The churn drill is similar to the larger cable-tool type. It is seldom used except in areas where underground cavities hamper the return flow of the circulating fluid used in the rotary methods. Portable drills, water jets, and airblast equipment and augers are also used in certain areas. Syn:blasthole dri. (references)
Source: compiled by the editor from various references; see credits.

Anagrams: SHOTHOLE DRILL

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "d-e-h-h-i-l-l-l-o-o-r-s-t"
	-3 letters: rhodolites.
	-4 letters: lordliest, rhodolite, threshold.
	-5 letters: dhoolies, dhooties, doorsill, drollest, hoodiest, lithosol, oestriol, oilholes, shrilled, stolider, strolled, thrilled, toeholds, toolshed, trollied, trollies.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.