Abstract:
Use of extruded pellets comprising carboxymethyl cellulose and at least another ceramic glaze additive for the preparation of ceramic glaze slips.
Abstract:
The present invention relates to emulsion stabilizing agents, to subterranean treatments fluids comprising said emulsion stabilizing agents and to a method of treating subterranean formations using said subterranean treatments fluids. These emulsion stabilizing agents, besides having excellent emulsifying properties, do not cause the swelling and dispersion of clays and are able to provide subterranean 5 treatments fluids with excellent rheological behaviour even at high temperatures.
Abstract:
A method of minimizing the weight loss of mass of the drilling pipe and wellbore casing while drilling a subterranean well with an oil-based drilling fluid comprising adding to the oil-based drilling fluid an anti-wear additive based on sulfated, sulfonated or sulfited natural oils or fats of vegetable or animal origin.
Abstract:
Method for inhibiting the swelling and the dispersion of shales in the treatment of subterranean shale formations comprising the use of a cationic tamarind gum and fluids for the treatment of subterranean shale formations comprising a cationic tamarind gum.
Abstract:
The present invention relates to hydrophobically modified hydroxyalkyl guar derivatives which dissolve rapidly in water, having a hydroxyalkyl molar substitution between 0.2 and 2.5 and containing hydrophobic groups comprising C10-C32 alkyl chains, to the procedure for their preparation and to their use in the formulation of well fluids.
Abstract:
Method for inhibiting the swelling and/or the dispersion of shales during the treatment of subterranean shale formations comprising the steps of: a) providing a subterranean treatment fluid comprising from 0.001 to 10% by weight of a polyester obtained by reacting a dicarboxylic acid having from 2 to 8 carbon atoms with a specific alkoxylated diamine; b) introducing said treatment fluid into a wellbore at a pressure sufficient to treat the subterranean shale formations.
Abstract:
Method of fracturing a portion of a subterranean formation through the use of an aqueous fracturing fluid having pH between 10 and 14 and comprising dissolved therein a crosslinked viscolelastic carboxymethyl cellulose.
Abstract:
Method for inhibiting the hydration of clays and shales during drilling operations comprising the use of a water base drilling fluid, which contains from 0.2 to 5 % by weight of the condensation product of a dicarboxylic acid having 4 to 10 carbon atoms with alkanolamines, diamines or polyalkyleneamines of formula R"'R"N-R'-XH, where X is O or NR 0 ; R 0 is hydrogen or a linear or branched alkyl group having from 1 to 6 carbon atoms, R' is a linear or branched, aliphatic or cicloaliphatic alkylene group having from 2 to 10 carbon atoms or R' is R””(NH-R””) n where R”” is ethylene or CH(CH 3 )CH 2 , n is a number from 1 to 6 and X is NR 0 ; R" and R"' can be equal or different from one another and are hydrogen or a linear or branched alkyl group having from 1 to 6 carbon atoms, optionally substituted with a hydroxyl group, the condensation product being in neutral form or in the form of salt.