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directional drilling
di·rec·tion·al drill·ing


noun 
Definition:
 
drilling method: a method of drilling for oil or gas or for installing underground utilities in which special assemblies are used to drill at any angle and around obstacles
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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