دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: in pipeline construction offshore, a pipe-straddling device fitted with nozzles on either side that is lowered by a bury barge. As water is pumped at high pressure through the nozzles, spoil from beneath the pipe is removed and pumped to one side of the trench. The line then sags naturally into position in the trench.