دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a device that converts the energy of a gas or vapor stream into mechanical work by expanding the gas or vapor through a turbine.

n: the erratic, nonlinear flow of a fluid, caused by high velocity. Characterized by random eddying flow patterns superimposed on the general flow progressing in a given direction.

n: A type of fluid flow characterized by swirling or chaotic motion as the fluid moves along the flow path. This is a preferred flow regime for mud removal during primary cementing because it is perceived to result in better removal of mud, especially of mud

non laminar flow, usually above a Reynolds number of about 3000. The Blasius equation estimates the friction factor for NRe values less than 100,000 as fB = 0.0791 / NRe0.25.

n: 1. space that permits the turning around of vehicles, specifically on the drill site. 2. a period during which a plant is shut down completely for repairs, inspections, or modifications that cannot be made while the plant is operating.

n: a system of mooring a drill ship on the drilling site, in which mooring lines are spooled onto winches mounted on a turret in the center of the vessel. Because all mooring lines are connected to the turret, the vessel is free to rotate around the turret axis and head into oncoming seas, regardless of direction.

abbr: true vertical depth.

True Vertical Depth.

true vertical depth from the rotary table.

n: a complete break in pipe caused by metal fatigue. v: to break something in two or to break apart, such as the head of a bolt or the drill stem.

v: Of drill pipe or drill collars,to part or split primarily because of metal fatigue.

n: The twisting vibration caused by flux of the rotary resistance force applied on the bit.

n: a vapor phase and a liquid phase flow in the same pipeline.

n: The rotary valve that have two position and three way,which can control direction change.