دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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: the entire length of all the joints of casing run in a well. Most casing joints are manufactured to specifications established by API, although non-API specification casing is available for special situations. Casing manufactured to API specifications is available in three length ranges. A joint of range 1 casing is 16 to 25 feet (4.8 to 7.6 metres) long;a joint of range 2 casing is 25 to 34 feet (7.6 to 10.3 metres) long;and a joint of range 3 casing is 34 to 48 feet (10.3 to 14.6 metres) long. The out- side diameter of a joint of API casing ranges from 4Yz to 20 inches (11.43 to 50.8 centimetres).

n: The entire length of all the casing joints run into the borehole. Several different sizes of casing string may be required.

a continuous string of casing, usually cemented over at least part of its length and usually extending back to surface from the set point.

n: a casing string with joints of various collapse resistance, internal yield strength, and tensile strength, designed for various depths in a specific well to best withstand the conditions of that well. In deep wens, high tensile strength is required in the top casing joints to carry the load, whereas high collapse resistance and internal yield strength are needed in the bottom joints. In the middle of the casing, average quality is usually sufficient. The most suitable combination of types and weights of pipe helps to ensure efficient production at a minimum cost.

n: A casing string made up of various different grades or weights of casing (sometimes referred to as a tapered string).

n: the casing joint cap with center-bore dissepiment，used in the well with moderate depth

n: short casing joint that connects the last casing and cement casing head , it aslo can adjust the top of location of casing strings .

n: a section of short casing joint joined in the casing pipe,used as a mark to detect the position of box coupling

the casing joint containing the cement float.

n: a relatively short length of pipe with holes or slots that is placed opposite a producing formation. Usually, it is wrapped with specially shaped wire that is designed to prevent the entry of loose sand into the well as it is produced. It is also often used with a gravel pack.

a casing joint with regular pattern slots of a specific phasing, width and length. Used as a simple sand control method.

n: The short casing joint that connecting the last casing and cement head.