دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The gas-holder tank connected with discharge line of reciprocal pump. It is a air cushion aerated by compressive air, used to absorb or decrease fluctuation of pressure and delivery capacity disproportion when reciprocal pump works.

n: See drilling fluid cushion box.

n: a quantity of water, drilling fluid, or compressed gas placed inside drill pipe or tubing to control both annular and formation pressures. Usually mud in the pipe or tubing supports prevents the pipe or tubing from collapsing;mud also holds back formation pressure pushing up the pipe or tubing. But sometimes, such as in drill stem testing, it is necessary to have empty pipe or tubing downhole. The cushion protects the pipe or tubing until it is in place. It also allows control of the rising formation pressure as the cushion is removed, as in drill stem testing, to prevent formation damage.

n: The definite water, drill fluid or compressed gas poured into drill pipe or oil tube.

a fluid column margin of some type. Usually well control mud weight, gas column, etc.

n: see blanket gas.

the reservoir pressure necessary to keep gas recoverable.

n: a kind container receiving the returning fluid from the well and making the fluid flow into the deck through the orifice in a wider fluid level and a lower flowing speed

n: a large, hook-shaped device from which the swivel is suspended. It is designed to carry maximum loads ranging from 100 to 650 tons (90 to 590 tonnes) and turns on bearings HOOK in its supporting housing. A strong spring within the assembly cushions the weight of a stand (90 feet, about 27 metres) of driI1 pipe, thus permit- ting the pipe to be made up and broken out with less damage to the tool joint threads. Smaller hooks without the spring are used for handling tubing and sucker rods. See also .stand, swivel.

n: tha large component attached to the travelling block from which the drill stem is suspended via the swivel

a cushion of nitrogen gas placed on top of a liquid column to reduce the downhole pressure. Also use in the annulus for an expansion cushion in the event of annular fluid expansion.