USE OF SILICATES IN LAYERS, SYNTHETICS, ABSORBENTS, IN AQUEOUS TREATMENT COMPOSITIONS, FOR PERFORATIONS.
Номер патента: ES2022239B3
Опубликовано: 01-12-1991
Автор(ы): Claus-Peter Herold, Hans Dolhaine, Heinz Müller, Rybinski Wolfgang Von, Tapavizca Stephan Von, Winfried Wichelhaus
Принадлежит: Henkel AG and Co KGaA
Опубликовано: 01-12-1991
Автор(ы): Claus-Peter Herold, Hans Dolhaine, Heinz Müller, Rybinski Wolfgang Von, Tapavizca Stephan Von, Winfried Wichelhaus
Принадлежит: Henkel AG and Co KGaA
Реферат: Synthetic swellable layer silicates corresponding to the following formula MgO.aMA.bAl2O3.cSiO2.nH2O (I) in which M is Na+ and Li+ having an Na:Li ratio of at least 1; A is F-, OH- or 1/2O2- or a mixture thereof; a is 0.1 to 0.6; b is 0 to 0.3; c is 1.2 to 1.7; and n is 0 to 3.0. are used in water-based well-servicing fluids as a high-temperature-stable thixotrope substantially unaffected by alkaline earth metal ions.
Use of polymer in form of dispersion as friction reducing agent in aqueous fracturing fluids
Номер патента: RU2363719C2. Автор: Сесил С. БЛЭР,Кин Тай ЧАНГ,Дуэйн С. ТРЭЙБИГ,Курт С. ГЕРКЕН. Владелец: Налко Компани, корпорация штата Делавэр. Дата публикации: 2009-08-10.