DELAY COATING FOR WELLBORE ISOLATION DEVICE

A wellbore isolation device includes a mandrel, a sealing element disposed around at least a portion of the mandrel, and a delay coating disposed on at least a portion of an outer surface of the sealing element. The sealing element includes a swellable material and the delay coating covers a cross-l...

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Bibliographische Detailangaben
Hauptverfasser:	WONG, EE WEN, LEE, NELSON YAN LOO, CHEE, BING HONG, TAN, YONG DAI, FRIPP, MICHAEL LINLEY, YANG, KEJIA, VOIT, WALTER, ZHONG, XIAOGUANG ALLAN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FILLING PASTES FIXED CONSTRUCTIONS INKS 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 PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	A wellbore isolation device includes a mandrel, a sealing element disposed around at least a portion of the mandrel, and a delay coating disposed on at least a portion of an outer surface of the sealing element. The sealing element includes a swellable material and the delay coating covers a cross-linked polymer. The delay coating is configured to swell or degrade in a wellbore fluid. L'invention concerne un dispositif d'isolation de puits de forage qui comprend un mandrin, un élément d'étanchéité disposé autour d'au moins une partie du mandrin, et un revêtement retard disposé sur au moins une partie d'une surface extérieure de l'élément d'étanchéité. L'élément d'étanchéité comprend un matériau gonflable et le revêtement retard recouvre un polymère réticulé. Le revêtement retard est conçu pour gonfler ou se dégrader dans un fluide de puits de forage.