دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: This schlumberger module provides direct measurements of wellbore fluid resistivity and temperature, also cable tension below the toolstring head. Useful to run in poor hole condition;should allow differentiation of differential sticking and keyseat stic

n: a device made up in the drill stem above the mill to collect bits of junk ground away during a milling operation. During milling, drilling mud under high pressure forces bits of junk up the narrow space between the boot sub and hole wall. When the junk reaches the wider annulus above the boot sub and pressure drops slightly, the junk falls into the boot sub. A boot sub also can be run above the bit during routine drilling to collect small pieces of junk that may damage the bit or interfere with its operation. Also called a junk sub or junk boot.

a device run in the drill string just above the mill to catch cuttings.

any of several radioactive, chemical or physical properties logs that are run in a cased hole environment. May be conveyed by electric line, coiled tubing, slick line (memory logs) or drill pipe (LWD).

n: a swage nipple, usually beveled, installed on the top of a string of pipe that does not extend to the surface. It prevents a smaller string of pipe or tools from hanging up on the top of the column when it is run into the well.

n: The joint that is installed at the top of the casing string which doesnt reach to the earth surface.

n: a perforating gun run into the casing string. Most perforating guns are run into the well through the tubing string. casing hanger n: a circular device with a frictional gripping arrangement of slips and packing rings used to suspend casing from a casinghead in a well.

n: A device installed with shaped charge or bulletfor, used for casing perforating.

a large perforating gun, run into a well without tubing.

n: a tool composed of a mandrel on which are mounted several heavy-duty rollers with eccentric roll surfaces. It is used to restore buckled, collapsed, or dented casing in a well to normal diameter and roundness. Made up on tubing or drill pipe and run into the well to the depth of the deformed casing, the tool is rotated slowly, allowing the rollers to contact all sides of the casing and restore it to roughly its original condition.

n: The tool for repairing and maintaining casing. Consisted by arbor and a set of bias gyro wheel.

a downhole tool, commonly run on pipe to try to reform the casing after a partial collapse.

n: a bladed tool used to scrape away junk or debris from inside casing;it is usually run into the casing on drill pipe or tubing.

n: A tool for cleaning crud of inside wall of casing. The blade with sword is installed in the cavity of cage. The blade clings the pipe wall because of leaf spring.

a downhole tool with scraping teeth and brushes that is used to remove perforating burrs, “lipped down” areas in connection pins and remove mill scale, dried mud or cement, pipe dope and other well completion debris.

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: the adherence of casing to cement and cement to formation. When casing is run in a well, it is set, or bonded, to the formation by means of cement.

n: The formation and casing are binded with each other after cementing.

the strength and adherence of the cement to the pipe and the formation.

n: a workover performed with a continuous steel tube, normally 0.75 inch to I inch (1.9 to 2.54 centimetres) outside diameter, which is run into the well in one piece inside the normal tubing. Lengths of the tubing up to 16,000 feet (4,877 metres) are stored on the surface on a reel in a manner similar to that used for wireline. The unit is rigged up over the wellhead. The tubing is injected through a control head that seals off the tubing and makes a pressuretight connection.