Concentric profile control water distribution device of bridge type

The utility model provides a concentric profile control water distribution device of bridge type, include from last top connection, adapter sleeve, seating nipple, the lower clutch that connects gradually extremely down, be equipped with the location axle in the adapter sleeve, be equipped with the measure and regulate interface in the axle of location, be equipped with gradual change formula activity water injection well choke in the seating nipple, measure and regulate interface lower extreme is connected with gradual change formula activity water injection well choke. The utility model discloses can effectively prevent mechanical shear effect, reduce polymer solution's viscosity loss, ensure the viscosity retention rate of profile control process. Simultaneously, overflowing the terminal surface and having better throttling action, the current -limiting resistance is big, and throttle pressure differential is big, realizes seperated layer water injection and two kinds of functions of chemical profile control of the device.