METHOD AND COMPOSITION FOR CLAY REMOVING FROM BOTTOMHOLE FORMATION ZONE

FIELD: oil and gas industry, particularly for chemical treating of bottomhole formation zone, for elimination of differential pressure sticking during well drilling. ^ SUBSTANCE: composition includes ammonium containing substance and organic solvent. Above components are taken in the form solid part...

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Bibliographische Detailangaben
Hauptverfasser:	GORBUNOV V.V, EVSTIFEEV S.V
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	ADHESIVES CHEMISTRY DYES EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MINING MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PAINTS POLISHES
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Beschreibung
Zusammenfassung:	FIELD: oil and gas industry, particularly for chemical treating of bottomhole formation zone, for elimination of differential pressure sticking during well drilling. ^ SUBSTANCE: composition includes ammonium containing substance and organic solvent. Above components are taken in the form solid particles suspended in organic solvent. The composition includes 1-70% by weight of mixture comprising ammonium containing substance and carboxylic acid and/or derivative thereof, wherein ratio between ammonium containing substance and carboxylic acid and/or derivative thereof is from 1:10 to 10:1. Method of clay removing from bottomhole formation zone involves injecting above composition in formation and displacing thereof with water having pH value of from 1 to 8. ^ EFFECT: reduced time of work performing, increased ability of intensification of fluid flow from formation; elimination of inorganic acid influence on bottomhole equipment corrosion. ^ 2 cl, 2 dwg