دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: Used for mud thinner directly and the main material of drilling fluid treating chemical of lignin derivant.

adj: antimagnetic. Diamagnetic materials resist flux by aligning themselves at right angles to the lines of force in a magnetic field. See ferromagnetic. paramagnetic.

n: organic acids of indefinite composition in naturally occurring leonardite lignite. The humic acids are the most valuable constituent. See lignins.

n: a kind of crude organic macromolecule compound.

n: a naturally occurring oxidised lignite. See lignins.

n: The component of a tree that is extracted in the paper-manufacturing process and used as an additive in drilling fluids. Specifically, lignin is a highly polymerized, amorphous material that makes up the middle lamella of woody fibers and cements the fibe

n pi: naturally occurring special lignites, e.g., leonardite, that are produced by strip mining from special lignite deposits. Used primarily as thinners and emulsifiers.

n pi: naturally occurring special lignite. e.g., leonardite. that is produced by strip mining from special lignite deposits. The active ingredient is the humic acids. Mined lignins are used primarily as thinners. which mayor may not be chemically modified;however, they are also widely used as emulsifiers.

n: a kinds of special natural brown coal.

n: a special sub that contains a key or slot,which must be aligned with the scribe line of the bent sub.a surveying instrument can then be run into the sub, aligning itself with the key to give the orientation of the scribe line, which defines nthe toolface.

n: in pipeline construction, the workers responsible for positioning the pipe, aligning it, and making the initial welds. The pipe gang sets the pace that determines the progress of the rest of the spread.