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Downstream sector

The refining and marketing sector of the petroleum industry.
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Dry hole

Any exploratory or development well that does not find commercial quantities ...
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Dry Gas

Or Lean gas is natural gas composed mainly of methane.
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Drilling Mud / Fluid

Mixture of base substance and additives used to lubricate drill bit ...
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Deep-Water Discovery

An offshore discovery located in at least 200 metres of water.
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Derrick

Elongated pyramid of latticed steel mounted over bore hole for suspending ...
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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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