FIELD: oil and gas industry.
SUBSTANCE: string shoe includes housing, which one end is intended for connection to the pipe string, and sleeve coupled to the other end of housing. There is shrouding with central channel made of easily-drillable material and placed in the below part of sleeve cavity. The bottom free end of the sleeve with shrouding is bevelled. At that in front of the shrouding the sleeve has lateral openings in regard to its outer surface; it is rotatable in regard to the housing at axial interaction of the device with an obstacle in the borehole or at rotation in regard to the housing at the well flushing.
EFFECT: improved reliability of the casing pipe running in up to the preset depth due to potential borehole reaming at different modes.
8 cl, 2 dwg
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