SHALE-STABILIZING DRILLING FLUID ADDITIVES

SHALE-STABILIZING DRILLING FLUID ADDITIVES

TITLE SHALE-STABILIZING DRILLING FLUID ADDITIVES Additive compositions and aqueous drilling fluids which impart improved wellbore stability in drilling shale formations consisting essentially of one or more water-soluble high molecular weight polymers capable of forming relatively strong nucleophili...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: PALMER, CHARLES F., JR, WINGRAVE, JAMES A, CARTER, THOMAS S
Format: Patent
Sprache:eng ; fre
Schlagworte:
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
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Beschreibung
Zusammenfassung:TITLE SHALE-STABILIZING DRILLING FLUID ADDITIVES Additive compositions and aqueous drilling fluids which impart improved wellbore stability in drilling shale formations consisting essentially of one or more water-soluble high molecular weight polymers capable of forming relatively strong nucleophilic sites when treated with base and one or more potassium salts which have sufficient alkalinity to raise the pH of the resultant drilling fluid to above 9.0, but whose anions are relatively weak nucleophiles compared to the polymeric nucleophilic sites.