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Drilling Operations, Surface Stack, Puzzle # 1

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ACCUMULATOR     ANNULAR     ATMOSPHERIC     BARRIER     BLIND     BLINDSHEAR     BRIDGING

BYPASS     CHOKE     CLOSINGRATIO     DEGASSER     DIVERTER     DRILLER     ENVELOPE     FIXED

FLOAT     FOSV     HARD     HYDROSTATIC     IBOP     INDEPENDENT     MANAGEMENT     MATERIAL

MECHANICAL     MGS     MUDLEG     NEUTRAL     OPERATIONAL     PHYSICAL     PIT     PRESSURE

PRESSURIZED     SHEAR     SOFT     SOLUBLE     STRIPPING     TEMPERATURE     TRIP     VARIABLE

VISCOSITY