دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

purposely breakable valve, usually a flapper in a fluid loss device.

n: 1. water produced with oil. It usually settles out within five minutes when the well fluids become stationary in a settling space within a vessel. Compare emulsified water. 2. the measured volume of water that is present in a container and that is not in suspension in the contained liquid at observed temperature.

1. the excess water that separates from a cement slurry on standing. 2. the first water that separates from the crude oil in the first stage of the separator (free water knockout or FWKO).

n: a convention stage-cement method that open valve plug free falls depend on gravity.

n: (FWKO) a vertical or horizontal vessel into which oil or emulsion is run to allow any water not emulsified with the oil (free water) to drop out.

n: the vertical distance between the waterline and the freeboard deck on a ship, boat, or floating offshore drilling rig. Draft plus freeboard equal total height of vessel.

n: a device fitted on the vertical support members of the Trans-Alaska Pipeline System (TAPS) to circulate a refrigerant continuously between the subsoil and the top of the pipe. The refrigerant keeps the ground beneath the pipeline frozen to prevent frost heaving.

where the independent variable is distance and the dependent variables are strength of the signal and frequency of the signal. (A domain is a mathematical function with dependent and independent variables.)

n: an output in the form of frequency that varies as a function of the applied measurand (e.g., angular speed and flow rate).

n: the measured values over which a meter or other measuring instrument is intended to measure, specified by their upper and lower limits.

n: resistance to movement created when two surfaces are in contact. When friction is present, movement between the surfaces produces heat.

the resistance to a object’s passage through a fluid (or a fluid’s passage past a stationary object). Affected by viscous resistance, density, wall contact (vessel radii).