دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a roller cone bit that is specially designed for air or gas drilling. It is very similar to a regular bit, but features screens over the bearings to protect them from clogging with cuttings and thicker hardfacing on the shirttail to protect them from abrasive, high-velocity air or gas drilling fluid.

n: A kind of small and short handcart for moving casing from pipe rack to DF.

n: the theory that the earths landforms assumed their present configuration in a brief episode at the beginning of geologic history-possibly in a single great catastrophic event-and have remained relatively unchanged since that time. Compare uniformtarianism. catcher n: a device fitted into a junk basket that retains the junk picked up by the basket catch samples v: to obtain cuttings for geological information as formations are penetrated by the bit The samples are obtained from drilling fluid as it emerges from the wellbore or, in cable-tool drilling, from the bailer. Cuttings are carefully washed until they are free of foreign matter, dried, and labelled to indicate the depth at which they were obtained.

abbr: derrick floor;used in drilling reports.

derrick floor.

diagnostic fracture injection test.

deferred production.

n: two trailers load the motor,drawworks,headframe and apparatus on the drill floor .when those eqiupments are transported to the drill site ,the two trailers are joined to form a whole drilling rig

n: a wooden pole which is used to carry headframe.

n: bed timbers that are used to carry percussion drill headframe,beam arm,big pedestal and motor back.

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