دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a device fitted on the drawworks and used to cause the fastline to reverse its direction on the drawworks drum or spool when a layer of line is completed on the drum and the next layer is started.

n: a rubber component that fixes on the drillwork of rig, which makes fast line begin reversely at the another layer after completion of one layer on the cyliner.