Efflux formula stationary vane reaming instrument

The utility model relates to a viscous crude thermal recovery completion technology field, in particular to efflux formula stationary vane reaming instrument. The design has the footpath of guarantor step on the body outer wall of this instrument, is fixed with two wings through the symmetry of pinning on the body outer wall of footpath in insurance validity step lower extreme, and the gear wheel is installed through the gyro wheel bearing to the wing lower extreme, and a plurality of cutting teeths are arranged to the spiral on the gear wheel, install the nozzle body in the sprue at body center, and nozzle body upper end sets up disturbs the wheel. The utility model discloses a major diameter reaming function reduces major diameter reaming operating risk, can reduce the vibration in the pit of reaming operation in -process, has automatic subtracting and turns round the effect, and effectively protective well low tube cluster improves reaming efficiency, and back well quality is expanded in the guarantee, red