دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the changed value of azimusth angle in unit length of the wellbore

n: 1. a hole in the rig floor, some 30 to 40 feet (9 to 12 metres) deep, which is lined with casing that projects above the floor, into which the kelly and the swivel are placed when hoisting operations are in progress. 2. a hole of a diameter smaller than the main hole and drilled in the bottom of the main hole. v: to reduce the size of the wellbore and drill ahead.

thermodynamic comparison (k = cp/cv) of the ratio of a specific heat (k) at a constant pressure (cp) to a specific heat at a constant volume (cv). The ratio range for most gasses is 1.2 to 1.4.

a Weatherford valve, retrievable dummy dump valve. It is a valve that is placed in a standard gas lift mandrel and has a fracture rod for pressure shearing (then has a check valve to prevent tubing to casing communication). It can be used to displace the

n: a device that indicates or registers the value measured by an instrument in practical units.

n: in an induction logging tool, a device that puts out electrical voltage, which is induced in the coil by eddy currents in a formation. The eddy currents are created by a transmi\ter coil on the logging tool. The amount of voltage induced in the receiver coil depends on the conductivity of the formation.

n: a type of compressor that has pistons moving back and forth in cylinders, suction valves, and discharge valves, i.e., a positivedisplacement compressor. Reciprocating compressors are used extensively in the transmission of natural gas through pipelines.

n: a pump consisting of a piston that moves back and forth or up and down in a cylinder. The cylinder is equipped with inlet (suction) and outlet (discharge) valves. On the intake stroke, the suction valves are opened, and fluid is drawn into the cylinder. On the discharge stroke, the suction valves close, the discharge valves open, and fluid is forced out of the cylinder.

n: A type of fluid pump in which reciprocating pistons or plungers displace the fluid.

a piston pump.

n: a cross section of the earth generated by computer from tapes that have recorded the sound vibrations reflected during seismic exploration. Expert interpretation can reveal what may be a trap for petroleum. Also called seismic section.

n: a device, driven by a clockwork mechanism, that provides a chronological record of gauge indications (e.g., by tracing values of pressure, vacuum, voltage) on a paper form.

n: the instrument which can record the measured data in the paper automaticly in chronological