OVERBURDEN DRILLING

Domain	Definition
Mining	A. A technique developed in Sweden that involves the sinking, by percussive-rotary drilling, of a drill casing through the overburden to where it seats in the underlying rock. A rotary percussion drill hole is then continued to the desired depth in the rock. While the casing is being sunk through the overburden it is coupled to the drill rod and rotates and reciprocates with it. The rock bit on the end of the drill rod projects about an inch beyond the end of the ring bit with which the casing is fitted and acts as a pilot bit for the casing bit b. A drilling method whereby drilling is carried out through subsoil andboulders or underwater to and through bedrock J., 2. (references)
Source: compiled by the editor from various references; see credits.

Anagrams: OVERBURDEN DRILLING

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "b-d-d-e-e-g-i-i-l-l-n-n-o-r-r-r-u-v"
	-5 letters: overburdening.
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.

Alternative Orthography: OVERBURDEN DRILLING

Hexadecimal (or equivalents, 770AD-1900s) (references)

Leonardo da Vinci (1452-1519; backwards) (references)

Binary Code (1918-1938, probably earlier) (references)

HTML Code (1990) (references)

ISO 10646 (1991-1993) (references)

Encryption (beginner's substitution cypher): (references)

Specialty Definition: OVERBURDEN DRILLING