دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a drilling method in which the hole is drilled by the rigs equipment dropping a sharply pointed and heavily weighted bit on bottom. The bit and weight are attached to a cable, and the rigs equipment repeatedly drops the cable to drill the hole.

n: a sucker rod pumping unit. not commonly used. that employs cable wound around a spool. one end going into the hole. the other with a suspended counterweight. This type of unit can achieve 40- to SO-foot ( 12- to 24- metre) stroke lengths. reducing dynamic loads, rod reversals. gas locking. and power usage and can be applied to deep pump applications

n: in a sucker rod pump, the device that contains and confines the valve ball and keeps it the proper operating distance from the valve seats.

n: a special wrench designed for use in connecting the cage of a sucker rod pump to the sucker rod string.

a wrench for connecting the cage of a sucker rod pump to the rod string.

n: 1. one of several columns made of steel or concrete that serve as the foundation for a rigid offshore platform rig, such as the concrete gravity platform rig. 2.equipment below the waterline of an Arctic submersible rig, thereby protecting the equipment from damage by moving ice.

large outer pipe, often a form or a barrier.

n: a drilling platform that rests on a steel or concrete caisson. Used mainly in the Arctic, caissontype drilling platforms are mobile offshore drilling units built to withstand the ravages of moving ice in Arctic waters.

n: see caissontype drilling platform. platform rig.

n: see filter cake.

n: A tier of penetrant medium adhering to the borehole face in the filtration process of solid phase of drill fluid.

filter or mud cake, stranded by dehydration on the face of a permeable formation by fluid loss.

n: the character or state of the drilling mud filter cake. According to API RP I3B, such notations as hard," "soft," "tough," "rubbery," and "firm" may be used to convey some idea of cake consistency.