دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The pressure that drilling fluid overcomes friction when it flow in the annular space.

n: The phenomenon that nature gas enters into another formation or overflow the surface through circline cement mantle between casing and formation.

Injection of fluids down the annulus or “backside”. Common as a gas supply path for gas lift. Also used in some fracturing operations, to spot fluids downhole when no packer is used or a type of injection valve is in the tubing to allow entry of chemicals

n: See annular pressure loss.

a device that seals the annulus to pressure or flow.

n: fluid pressure in an annular space, as around tubing within casing.

pressure in an annular area. May be a vented or trapped annuli.

n: The pressure deficiency through the flowing direction due to friction resistance when drilling fluid flows in the annular.

n: A large BOP (q.v.) valve that forms a seal in the annular space between the wellbore and the drill pipe. It is usually installed above the ram type preventers in the BOP stack.

a elastomer bag or donut type seal, pushed into contact with the pipe or tools in the blow out preventer (BOP). It is designed to seal around pipe or any other irregular surface tool (packers, guns, pumps, etc.) that may be in the BOP. May also be called

n: production of formation fluids through the production casing annulus.

n: The main closed component of annular preventer, made by framework and sulphurate.