دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: See V-door.

n: See V-door.

n: an opening at floor level in a side of a derrick or mast. The V -door is opposite the drawworks and is used as an entry to bring in drill pipe, casing, and other tools from the pipe rack. The name comes from the fact that on the old standard derrick, the shape of the opening was an inverted V.

n: The opening in front of the derrick,which make things convenient for lifting the drill string and casing.

an opening at floow level in the side of the rig to facilitate bringing in pipe.