Definition of drill string in English:

drill string

Line breaks: drill string

Entry from British & World English dictionary

noun

A structure consisting of coupled lengths of pipe or casing, which occupies the hole made in drilling for oil or gas.

Definition of drill string in:

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Word of the day dinkum
Pronunciation: ˈdɪŋkəm
adjective
(of an article or person) genuine, honest, true