Gelled pigs for cleaning and sanitizing pipelines

Details Gelled pigs for cleaning and sanitizing pipelines Gelled pigs for cleaning and sanitizing pipelines

B - Operations, Transporting

08

B

15/12, 6/99

B08B 9/04 (2006.01)

Patent

CA 1145902

Abstract Pipeline interiors are treated by passing through said pipeline an aqueous gelled pig containing an aqueous, cross-linked gelled galactomannan gum, or derivative thereof. A bactericide may optionally be included in the gelled pig to sanitize the interior of the pipe. The interior surface of a pipeline may optionally be dried by sequentially passing through the pipeline an aqueous cross-linked gelled pig, a fluid mobility buffer comprising a non-crosslinked gelled alkanol of from one to three carbon atoms, and a des- sicating amount of a liquid alkanol from one to three carbon atoms. 27,974A-F

362839

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