دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a valve installed above the kelly that can be closed manually to protect the rotary hose from high pressure that may exist in the drill stem.

n: The two position and two way valve located between the sub of swivel and the upper of kelly,which can seal the pressure of drill pipe when well blowout.

a valve at the top of the kelly that can be closed in the event of a inside tubing kick or high pressures.

n: thickness forged to the end of a tubular (such as drill pipe) to give the end extra strength. v: to forge the ends of tubular products, such as drill pipe, so that the pipe wall acquires extra thickness and strength near the end. Upsetting is usually performed to strengthen the pipe so that threads, or threaded pieces, such as tool joints, can be added to the pipe.

U238, one of the natural isotopes that as a trace element may incorporate into the matrix of naturally forming barium or strontium sulfate scale and make it a very low level radioactive material (NORM scale).

n: an opening at floor level in a side of a derrick or mast. The V -door is opposite the drawworks and is used as an entry to bring in drill pipe, casing, and other tools from the pipe rack. The name comes from the fact that on the old standard derrick, the shape of the opening was an inverted V.

n: The opening in front of the derrick,which make things convenient for lifting the drill string and casing.

n: see direct-indicating viscometer.

Fann viscosimeter.

n: on a dry air cleaner on an engine, a special valve that automatically opens to dump dust accumulated in the chambers of the air cleaner.

n: a device used to prevent a vacuum from occurring in a tank, vessel, piping, and so on.

n: a device in which gascut mud is degassed by the action of a vacuum inside a tank. The gas-cut mud is pulled into the tank, the gas removed, and the gas-free mud discharged back into the mud tank.

n: The equipment using through-going and low pressure of vacuum to degas.