PIPE FLARING DEVICE Russian patent published in 2010 - IPC E21B29/10 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to drilling wells and in particular is intended for flaring profiled pipes and their installation inside wells. The device contains a housing with a central channel, threads for connection to well equipment and indentations on the outer surface wherein rollers are arranged mounted on axles whose lower ends are mounted onto supports arranged in the housing on pivots so that to enable their turning within the plane passing through the longitudinal geometric axes of the housing and the rollers with the upper ends fixed in radial grooves of the housing so that to enable their limited relocations forward. In the housing central channel a hydraulic ring piston is arranged, spring-loaded in the axial direction and having a pusher whose outer surface is conic shaped. The rollers on the outer surface have recesses. The pusher is positioned at the piston bottom so that to enable rotation and interaction inside with the rollers outer surface with its conic surface that has projections to match the rollers recesses.

EFFECT: improved flaring quality, extended useful life of the rollers.

4 dwg