Bypass pig

B - Operations – Transporting – 08 – B

Patent

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Details

B08B 9/055 (2006.01)

Patent

CA 2753070

Embodiments of the present invention generally relate to a bypass pig. In one embodiment, a pig for cleaning a tubular string includes a cylindrical body and two or more scrapers disposed along an outer surface of the body. The scrapers are operable to engage and clean an inner surface of the tubular string. The pig further includes a bypass formed between the scrapers. The bypass is operable to: intake a portion of propellant from a tail of the body, conduct the portion of propellant along an outer surface of the body, and discharge the portion of propellant in front of the body.

La présente invention porte de manière générale, dans certains modes de réalisation, sur un racleur de dérivation. Dans un mode de réalisation, un racleur pour nettoyer un train de tiges comprend un corps cylindrique et au moins deux grattoirs disposés le long d'une surface externe du corps. Les grattoirs peuvent être actionnés pour venir au contact et nettoyer une surface interne du train de tiges. Le racleur comprend en outre une dérivation formée entre les grattoirs. La dérivation peut être actionnée pour : admettre une partie d'agent propulseur à partir d'une partie arrière du corps, conduire la partie d'agent propulseur le long d'une surface externe du corps, et évacuer l'agent propulseur devant le corps.

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Profile ID: LFCA-PAI-O-1942432

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