دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a filtering device that uses replaceable cartridge elements to filter liquids to a required level.

n: an interest in oil and gas created out of a greater interest and assigned by the owner. Examples are the grant of an overriding royalty interest out of a working interest and the grant of an oil payment out of a working interest.

n: The filtration of casing due to fracture or defective tightness of thread.

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 force multiplier tool used when screwing on the casing with hand.

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 substance that alters, accelerates, or instigates chemical reactions without itself being affected.

a chemical that enables or speeds up a chemical reaction without being consumed by the reaction.

n: a rock formation that contains large open spaces, usually resulting from the dissolving of soluble substances by formation waters that may still be present. See vug.

n: A formation having columinous voids, usually the result of dissolving by formation waters which may or may not be still present.

n: the formation and collapse of vapour gas-filled cavities that result from a sudden decrease and increase of pressure. Cavitation can cause mechanical damage to adjacent surfaces in meters, valves, pumps, and pipes at locations where flowing liquid encounters a restriction or change in direction.

the creating of a high speed, very low pressure vapor bubble that quickly and violently collapses. Very detrimental to surfaces in the near proximity. Often seen in severe turbulent flow.

n: A kind of gyulekhite. Usually coming from olivine alteration in cavernous basalt.