دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a naturally occurring clay that, after activation, usually with acid, is used mainly as a decolourant or refining agent, and sometimes as a desulphuriser, coagulant, or catalyst.

liquefaction or break down of oily waste or clean-up of oil spills by the use of the naturally occurring oil consuming bacteria, chiefly ultramonis and pseudomonis.

one of three naturally occurring isotopes of carbon. The half life of the C14 isotope makes it idea for determining the difference between thermogenic methane (C14 absent) and biogenic gas.

n: zone of naturally occurring fissures or fractures that can pose problems with lost circulation.

Uses a scintillation crystal and a photomultiplier tube to measure naturally occurring and artificially induced gamma-ray radiation. The gamma-ray radiation is a signature of the formations in a well – very useful in depth control. Used in open hole or pi

n: a naturally occurring hydrophilic polysaccharide derived from the seed of the guar plant. The gum is chemically classified as a galactomannan. Guar gum slurries made up in clear fresh or brine water possess pseudoplastic flow properties.

n: A hydrophilic polysaccharide from the seed of the guar plant. It is a galactomannan type of saccharide that is highly dispersible into water and brines of various types and salinity. Its water solutions are non-Newtonian and also can be cross-linked by bo

n: any relatively sticky formation (such as clay) encountered in drilling.

n: a naturally occurring clay that contaminates the mud as the hole is being drilled.the clay hydrates rapidly to form a thick plug that can not pass through a marine riser or mud return line.

sticky, reactive shale formation.

n: a naturally occurring crystalline fom1 of calcium sulphate in which each molecule of calcium sulphate is combined with two molecules of water. See anhydrite. calcium sulphate.

n: a naturally occuring crystalline form of hydrous calcium sulfate.

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.