Patent ID: 7989398
Filing Date: 2011-08-02
Classification: C09K,Y10S

Abstract:
1. Pumpable multiple phase vesicles carrying an oil field agent comprising: a first phase; a third phase which is an external phase selected from the group consisting of a drilling mud, a drill-in fluid, and a completion fluid; and a surface active material bilayer second phase separating the first phase from the third phase, where the surface active material bilayer is selected from the group consisting of phospholipids, alkyl polyglycosides, gemini surfactants, glycerol fatty acid esters including mono- and/or dioleates, polyglycerol fatty acid esters, ethoxylated amines, ethoxylated amides, and mixtures thereof, capable of forming a bilayer; where the oil field agent is identical with or present in a phase selected from the group consisting of the first phase, the third phase, and both phases, and where the agent is selected from the group consisting of: shale stabilizers selected from the group consisting of polyglycols, polyglycol ethers, potassium salts, aluminum salts, calcium salts, silicate salts, chelates, amphoteric compounds, and mixtures thereof, alone if liquid or in solution, filtration control additives, suspending agents, dispersants, thinners, anti-balling additives, seepage control additives, lost circulation additives, drilling enhancers, penetration rate enhancers, corrosion inhibitors, scavengers, gelling agents, buffers, cross-linkers for an agent to be cross-linked, and mixtures thereof.