دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a system in which certain instruments are used to control or to maintain the operating conditions of a process. If conditions become abnormal, this system automatically stops the process and notifies the operator of the problem.

n pi: a device, operated by air or hydraulic fluid, that fits into the opening in the rotary table when the drill stem must be suspended in the wellbore (as when a connection or trip is being made). Automatic slips, also called power slips, eliminate the need for roughnecks to set and take out slips manually. See slips.

n: A tool operated by pneumatics or hydraulic pressure.Used for chafing the drill stem when pipe connection or tripping.

n: an instrument that automatically measures and displays liquid levels or ullages in one or more tanks continuously, periodically, or on demand.

n: a metal tape used to connect the liquid level-detecting element and the gauge-head mechanism.

n: a meter accessory that enables a meter that is measuring volume at stress temperature to register the equivalent volume at a reference or base temperature.

n: See automatic feed.

n: a welding technique for joining pipe ends. Two general types of automatic welding used in pipeline construction are submerged-arc welding and automatic wire welding.

n: an automatic welding process utilising a continuous wire feed and a shielding gas. Automatic wire welding is similar to semiautomatic welding except that manual adjustment of the rate of wire feed and amount of shielding gas is unnecessary. See also semiautomatic welding.

n: a system that automatically measures and displays liquid levels or ullage in one or more vessel tanks on a continuous, periodic, or ondemand basis.

a set or release mechanism where pickup or set down will release or set the tool.