REAGENT-ADDITIVE TO LIQUID FOR KILLING OF WELL Russian patent published in 2010 - IPC C09K8/42 

Abstract RU 2385893 C1

FIELD: oil-and-gas production.

SUBSTANCE: reagent-additive contains cation surface active agent - quaternary ammonium compound, described by following common structure formula:

where R1 - alkyl C8-C18, R2 - CH3, -C2H5R3 - Cl, or Br, or -SO4CH3, herewith reagent-additive contains mixture of quaternary ammonium compounds with following chemical composition and with following its quantitative content in mixture, wt %: compound (I) with R1-C8H15 0.1-10, compound (I) with R1-C10H21 1-20, compound (I) with R1-C12H23 30-70, compound (I) with R1-C14H27 5-30, compound (I) with R1-C16H31 1-20, compound (I) with R1-C18H35 - 0.1-5.

EFFECT: at addition of regent into salt-mineral solutions there is provided its good water-repellent and demulsifying abilities, low interfacial tension, stability of solutions to salting out and coagulation.

2 tbl, 1 ex

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RU 2 385 893 C1

Authors

Mikov Aleksandr Illarionovich

Shipilov Anatolij Ivanovich

Dates

2010-04-10Published

2008-11-05Filed