| 摘要 |
FIELD: oil and gas industry. ^ SUBSTANCE: device includes overlapping device consisting of connected sections of shaped tubes with cylindrical sections on ends, the main and additional roller-type flaring device, which are connected to overlapping device by means of connection and having cutting head from below for destruction of shoe during contact. There is shoe with non-return valve on lower end of overlapping device, and there is inner chamfer on upper end. Inner chamfer is made on lower end of overlapping device; at that, on upper and lower ends of overlapping device there uniformly made along the perimetre from the edge are through cuts having the possibility of formation of upper and lower flared ends bent outwards after expansion of overlapping device with roller-type flaring devices. ^ EFFECT: higher reliability and enlarged manufacturing capabilities of the device. ^ 4 dwg |
