NOVEL COMPOUNDS AND METHOD FOR GENERATING A HIGHLY EFFICIENT MEMBRANE IN WATER-BASED DRILLING FLUIDS

A method is disclosed that affords improved stability to wellbores during drilling in argillaceous formations with water-based drilling fluids. The method comprises adding to the drilling fluid a compound of the invention having the capacity in water to generate a highly efficient membrane on argill...

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Bibliographische Detailangaben
Hauptverfasser:	POBER, KENNETH, W, WELLS, DARRELL, TAN, CHEE, PHUAT, DRUMMOND, CALUM, J, MODY, FERSHEED, K, GEORGAKLIS, GEORGE
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:	A method is disclosed that affords improved stability to wellbores during drilling in argillaceous formations with water-based drilling fluids. The method comprises adding to the drilling fluid a compound of the invention having the capacity in water to generate a highly efficient membrane on argillaceous materials. The compound is soluble in the drilling fluid at least at the pH at which the compound is added to the drilling fluid or exists in the drilling fluid, but is insoluble in the water in the pores of the argillaceous formations, or at least at the pH of the water in such pores. La présente invention concerne un procédé permettant d'obtenir des puits de forage plus stables lors du forage, dans des formations argileuses, faisant appel à des fluides de forage aqueux. Ce procédé consiste à ajouter au fluide de forage un composé de la présente invention ayant la capacité dans l'eau de générer une membrane hautement efficace sur des matériaux argileux. Ledit composé est soluble dans le fluide de forage au moins au pH auquel le composé est ajouté au fluide de forage ou est présent dans ledit fluide de forage, mais est insoluble dans l'eau dans les pores des formations argileuses, ou au moins au pH de l'eau dans de tels pores.