Patent ID: 6851472
Filing Date: 2005-02-08
Classification: E21B

Abstract:
1. A tubular scraper tool, comprising: a mandrel; a scraper blade sleeve mounted on said mandrel in a non-torque-transfer relationship; at least one scraper blade mounted on said scraper blade sleeve, said at least one scraper blade being adapted for longitudinal tubular scraping; a sub fixedly mounted to said mandrel, adjacent said scraper blade sleeve; a clutch mechanism adapted to selectively engage said scraper blade sleeve with said sub in a torque transfer relationship; a non-threaded capture mechanism on said scraper blade sleeve, said capture mechanism being adapted to capture said at least one scraper blade to said scraper blade sleeve; wherein said capture mechanism comprises: a longitudinal slot adjacent each said scraper blade on said scraper blade sleeve; a keeper plate longitudinally slidable into said longitudinal slot, said keeper plate being adapted to extend at least partially over said scraper blade; an undercut in said slot adapted to prevent said keeper plate from escaping radially from said slot; a retainer ring disposable around said scraper blade sleeve adjacent to said longitudinal slot to prevent said keeper plate from sliding longitudinally out of said slot; and a dowel pin inserted from within said scraper blade sleeve to secure said retainer ring longitudinally in place on said scraper blade sleeve.