دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a subsea tree with the master valve above the tubing hanger.

adj: containing small cavities that are visible to the naked eye. A vesicular rock is a rock that contains small cavities.

n: a container used as a structural envelope to provide for functions that include storage, settling, separation, and filtration for liquid and/or vapor.. Conditions of vessel use include atmospheric and elevated pressures and temperatures.

n: (VEF) a calculated factor, based on the experience of recent voyages, that reflects the average difference between vessel and shore measurements in terms of percent.

n: 1. a device, positioned in the drill stem between the bit and the drill collars, that absorbs impact loads and vibration from the up-and-down motion of the drill stem. Vibration dampeners are designed to transmit torque while absorbing reciprocative loads that decrease the efficiency of the drill bit. Also called a Shock Sub. 2. a device affixed to an engine crankshaft to minimize stresses that result from torsional vibration of the crankshaft. vibration error n: the maximum change in operating output, at any measured value within a specific range, when vibration levels of specified amplitude and range or frequencies are applied to the transducer along specified axes.

n: The tool can decrease the vertical and rotary shock vibration coming from bottomhole .

n: An adjustable mechanical source that delivers vibratory seismic energy to the Earth for acquisition of seismic data. Mounted on large trucks, vibrators are commonly used for acquisition of onshore seismic data.

a seismic survey where the energy is generated by vibrators attached to large truck-mounted plates at the surface

n: The copolymer of maleic anhydride and vinyl acetate by catalytic reaction in the particular condition,which can be used as coagulant.

n: The production of ethylene-amine and vinyl sulfonate by catalytic reaction in the particular condition,which be used as thinner and filtrate reducer of high temperature drilling fluids.

n: It is used to product vinyl amine-vinyl sulfonate copolymer .