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Drill Bit

Located at end of drill-string cutting head is generally designed with ...
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Drill Cuttings

Lifted continually to surface during drilling by a circulating-fluid system driven ...
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Drill Collars

Heavy pipe-sections that put weight on drill bit.
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Development Expenditure

All costs including financing costs, E&A expenditures incurred in bringing a ...
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Delineation Well

Drilled at a distance from a discovery well to determine physical ...
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Drill Ship

Free floating mobile drilling platform used in very deep waters. Positioned ...
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E&P

Exploration and production. The "upstream" sector of the oil and gas ...
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Enhanced oil recovery (EOR)

Any method that increases oil production by using techniques or materials ...
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Established reserves

The portion of the discovered resource base that is estimated to ...
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