دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a white, puffy cloud with a dark base. Its shape is constantly changing. Prominent in the summer months, cumulus clouds generally cover only 25% of the sky.

n: see blanket gas.

the reservoir pressure necessary to keep gas recoverable.

a type of cut on the bottom of an overshot that, when rotated, can help center the end of a pips that is laying against the side of the hole.

completion and workover riser.

the trip time for a plunger from dropping to recovery.

Department of Transportation – a US government agency.

n: an A-frame that booms out 5 to 10 feet over the side of a barge. It has a cable or chain that is lowered to pick up pipeline. A diver attaches the pipeline to the line and it is reeled in on the davit.

n: (pronounced tower") in areas where two 12-hour tours are worked. a period of 12 daylight hours worked by a drilling or workover crew when equipment is being run around the clock.

n: The constant load affecting derrick over a long period of time. Including derrick itself and all kinds of devices installed on it.

n: (pronounced shiv") the sheave on a crown block over which the deadline is reeved.

n: See dead line sheave.