دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: one kind of nut, leguminous plant contain nitrogen.


a natural polymer from the guar plant. Common in fracturing fluid gellation.

n: refer to guar gum

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 hydrophilic plant polysaccharides or their derivatives that. when dispersed in water. swell to produce a viscous dispersion or solution. Unlike resins, they are soluble in water and insoluble in alcohol.

polymer gellants.

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 kind of soft rock with high montmorillonite and water,and which is easy to absorb water and swell ,as a rusult , the borehole lessens,the tools and bit are balled up ,jams the borehole ,and even leads other borehole problems

n: the stickiness formation which is encontered during drlling and which is soft ,stick and easy to lead the bit or tools balled up

n: a slurry in crude or diesel oil containing any of the following materials or combinations: bentonite, cement. attapulgite, and guar gum (never with cement). Used primarily in combating lost circulation.

cement (or some clays) and diesel oil dispersion that thickens when water is contacted.

n: an additive used to retard undesirable chemical action in a product. It is added in small quantities to gasolines to prevent oxidation and gum formation, to lubricating oils to stop colour change, and to corrosive environments to decrease corrosive action.

n: anyagent which,when added to a system, slows down or prevents a chemical reaction or corrosion. Corrosion inhibitors are used widely in drilling and producing operation to prevent corrosion of mental equipment exposed to hydrogen suphide, carbon dioxide,

a chemical that slows a reaction between a reactive fluid and a material. Specifically, acid corrosion inhibitors slow the reaction of acids on steels.

n: A kind of gumming of thread,which usually be used to prevent screw backoff.