دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see air-cooled exchanger. aerial river crossing n: a river crossing technique in which a pipeline is either suspended by cables over a waterway or attached to the girders of a bridge designed to carry vehicular traffic.

n: The vertical heigh from the top of girder of drill floor to the bottom surface of crownblock beam.

n: Two vertical girders sustaining drill floor and the equipments on it at the top of derrick base.

n: level component part in the headframe structrure ,its two ends is joined to derrick leg.

n: a temporary platform erected in the derrick or mast some 20 to 40 feet (6-12 metres) above the derrick floor. The derrickhand or another crew member works on the board while casing is being run in a well. The board may be wooden or fabricated of steel girders floored with antiskid material and powered electrically to be raised or lowered to the desired level. A stabbing board serves the same purpose as a monkeyboard but is temporary instead of permanent.

n: A temporary platform in the derrick ,20 to 40 feet above the floor,on which a crewman works while casing is being run to guide a joint while it is being screwed into the joint in the rotary table.

n: see wind ring.

n: a horizontal stiffening and structural member installed near the top of a floating-roof tank to reinforce the tank wall against wind pressure. Also called a wind girder.