Cold flow of fuel oils is improved by adding esters of addition products of epoxides of specifically limited nitrogen-containing compounds with linear saturated fatty acids or a combination of the esters and polymers of one or more monomers selected from the group consisting of olefins, alkyl esters of ethylenically unsaturated carboxylic acids and vinyl esters of saturated fatty acids to fuel oils.
A method for improving cold flow of hydrocarbon fuel oils
申请人:NIPPON OIL AND FATS COMPANY, LIMITED
公开号:EP0326356A1
公开(公告)日:1989-08-02
A method is disclosed for improving low temperature cold flow of fuel oils by using a cross-linked ester compound consisting essentially of a nitrogen-containing compound having hydroxyl group, a straight chain fatty acid, and a cross-linking agent.
Quaternäre Ammoniumverbindungen, deren Herstellung und deren Verwendung als Wäscheweichspülmittel
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0022562B1
公开(公告)日:1985-06-19
METHODS FOR ALTERING FLUID RHEOLOGY
申请人:CHEVRON U.S.A. INC.
公开号:US20160032174A1
公开(公告)日:2016-02-04
A method includes placing a treatment fluid including a crosslinked gel in a wellbore penetrating a subterranean formation, the crosslinked gel including a gelling agent and a borate crosslinking agent, de-crosslinking a portion of the crosslinked gel, the de-crosslinking induced by a sufficient change in operating pressure, the de-crosslinking providing a release of active sites on the borate crosslinking agent and reducing the viscosity of the treatment fluid, and providing a borate-affinity agent to capture the released active sites on the borate crosslinking agent. A fracturing fluid includes a gelling agent, a borate crosslinking agent, a latent borate-affinity agent, and a proppant.