دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

natural gas condensate, usually C2 to C8+. The C5-C8 components condense to a very volatile liquid when the temperature decreases near the wellhead.

n: See casing connection.

typically a length of casing with a connection on each end. Length may vary from less than 30 ft (9 m) to about 40 ft (12 m).

n: a means of cementing casing in a well so that the casing may, if necessary, be retrieved with minimum difficulty. A special mud, usually an oil mud, is placed in the well ahead of the cement after the casing has been set. Nonsolidifying mud is used so that it does not bind or stick to the casing in the hole in die area above the cement Since the mud does not gel for a long time, the casing can be cut above the cemented section and retrieved. Casing packs are used in wells of doubtful or limited production to permit reuse of valuable lengths of casing.

n: The cementing method that flow in some non-petrified special fluid at first before cementing. The casing above cement can be retrieved since this kind of drill fluid is non-condensing.

n: The packer is connected at the suitable part of casing string and trapped in the well to adjust for payzone. There are two non-return valves and a pilot valve. Open the pilot valve when reach to the certain pump pressure in cementing. The cement slurry en

n: the pressure in a well that exists between the casing and the tubing or the casing and the drill pipe.

n: See casing head pressure.

pressure (intended or not) that occurs on the various outside annuli.

a gas lift valve that is controlled by the casing or annulus gas supply pressure.

a tool assembly/staging area before the Vee Door on a rig.