دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

canisters of hydraulic fluid, pressurized with a nitrogen gas cap of sufficient pressure and volume to operate all the rams on a BOP in case of power failure to the BOP.

n: a procedure whereby the formation immediately below the casing shoe is subjected to a pressure equal to the pressure expected to be exerted later by the drilling fluid or by the drilling fluid and the back-pressure created by a kick. See leakoff test.

a LOT or an FIT test (check specifics for details),a pressurized test after primary cementing to make sure the bottom most seal with the formation will handle pressures needed for drilling the rest of the well.

v: to make repairs or modifications on a tank, pipeline, or other installation without shutting down operations.

a method of attaching a valve or port to a pressurized line without removing the pressure.

n: a specially fabricated length of casing or tubing usually placed temporarily above a valve on top of the casing- head or tubing head. It is used to run swabbing or perforating tools into a producing well and provides a method for sealing off pressure and thus should be rated for highest anticipated pressure.

n: A long, high-pressure pipe fitted to the top of a wellhead or Christmas tree so that tools may be put into a high-pressure well. The top of the lubricator assembly includes a high-pressure grease-injection section and sealing elements. The lubricator is i

a pressurized shell, mounted above the BOP or master valve, which houses the tool string when entering a live well.

a simple scale with a cup and bar with a sliding weight that, when used with a pedestal mount, will give the density of mud, cement or brines. See also Pressurized Mud Balance.

n: a spring-loaded safety valve that opens automatically when pressure exceeds the limits for which the valve is set. It is used as a safety device on pressurized vessels and other equipment to prevent damage from excessive pressure. Also called a relief valve, safety valve, or safety relief valve.

n: the valve that automatic opens and blowdowns when the pressure exceeds beforehand adjusted pressure.

v: to increase the internal pressure of a closed vessel.

a cup and bar with a sliding weight, similar to a Mud Balance, but also having a screw on top with a slide valve through which a small amount of fluid could be added under pressure, collapsing the air dispersed in the fluid. Better accuracy than an unpres

n: see pressure relief valve.

n: refer topop valve

a valve in a pressurized system that is set to open and relieve pressure at a certain pressure level.

v: to increase or maintain reservoir pressure by injecting a pressurized fluid (such as air, gas, or water) to effect greater ultimate recovery.