Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
WELL CEMENTING COMPOSITIONS AND METHODS
A well cementing composition comprises water, portland cement, a linear polyvinylalcohol and a crosslinked polyvinylalcohol. The composition may further comprise borosilicate glass microspheres. The crosslinked polyvinylalcohol is present to provide fluid-loss control. Boron from the glass microspheres may leach into the aqueous phase of the cement slurry, inhibiting the ability of the crosslinked polyvinylalcohol to provide fluid loss control. The linear polyvinylalcohol preferentially crosslinks with the boron, protecting the crosslinked polyvinylalcohol and preserving fluid-loss control.
WELL CEMENTING COMPOSITIONS AND METHODS
A well cementing composition comprises water, portland cement, a linear polyvinylalcohol and a crosslinked polyvinylalcohol. The composition may further comprise borosilicate glass microspheres. The crosslinked polyvinylalcohol is present to provide fluid-loss control. Boron from the glass microspheres may leach into the aqueous phase of the cement slurry, inhibiting the ability of the crosslinked polyvinylalcohol to provide fluid loss control. The linear polyvinylalcohol preferentially crosslinks with the boron, protecting the crosslinked polyvinylalcohol and preserving fluid-loss control.
WELL CEMENTING COMPOSITIONS AND METHODS
ZUSAMMENSETZUNGEN UND VERFAHREN ZUR BOHRLOCHZEMENTIERUNG
COMPOSITIONS ET PROCÉDÉS POUR LA CIMENTATION DE PUITS
CATHELINE SEBASTIEN (Autor:in) / MICHAUX MICHEL (Autor:in)
23.08.2017
Patent
Elektronische Ressource
Englisch