Filter device for sewage exploited from water injection well in oilfield development

The utility model relates to a filtering device for sewage exploited from a water injection well in oilfield development. The filtering device for the sewage exploited from the water injection well in the oilfield development mainly resolves the problem in the prior art that when the sewage containing a great number of impurities is injected back to the stratum under the shaft, the middle and later period development of an oil filed are seriously affected. The filtering device for the sewage exploited from the water injection well in the oilfield development is characterized in that a steel net (3), a supporting plate (6) and a filtering plate (8) are sequentially arranged inside a tank body (2) from top to bottom, a filtering layer (4) is arranged on the supporting plate (6), the wall of the tank body between the supporting plate (6) and the filtering plate (8) is provided with an air inlet pipe (5) and a blind plate (7), a filtering net (11) is arranged in a water outlet pipe (10), and a valve (12) is connected on the water outlet pipe (10) at the lower portion of the filtering net (11). The filtering device for the sewage exploited from the water injection well in the oilfield development can remove a great number of impurities in oil-water mixed sewage, and is good in filtering effect.