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Casing (borehole)
Casing is a large diameter pipe that is assembled and inserted into a recently drilled section of a borehole. Similar to the bones of a spine protecting the spinal cord, casing is set inside the drilled borehole to protect and support the wellstream. The lower portion (and sometimes the entirety) is typically held in place with cement. Deeper strings usually are not cemented all the way to the surface, so the weight of the pipe must be partially supported by a casing hanger in the wellhead. Casing that is cemented in place aids the drilling process in several ways: * Prevents contamination of fresh water well zones. * Prevents unstable upper formations from caving in and sticking the drill string or forming large caverns. * Provides a strong upper foundation to allow use of high-density drilling fluid to continue drilling deeper. * Isolates various zones, which may have different pressures or fluids, in the drilled formations from one another. * Seals off high pressure zone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Casing Diameters Of A Borehole
Casing may refer to an enclosing shell, tube, or surrounding material. It may also refer to: * Cartridge (firearms), shell enclosing the explosive propellant in ammunition * Casing (borehole), metal tube used during the drilling of a well * Casing (molding), decorative molding surrounding door or window openings * Casing (sausage), thin covering holding the food contents of sausage * Casing (submarine), platform attached to the upper side of a submersible vehicle * Computer case, the enclosure that contains most of the components of a computer * Letter case, the distinction between upper and lowercase letters in typography * Surreptitious reconnaissance, especially to aid a robbery See also * * * Cas (other), French for "case" * Case (other) * Casting (other) * Cover (other) * Sleeve (other) * KaSing Raymond Ka-Sing Tsang ( zh, t=曾家星, c=, s=, p=Céng Jiāxīng), better known by his in-game name kaSing, is a British profe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
