APPARATUS FOR GAS AND SAND SEPARATION DURING OIL EXTRACTION Russian patent published in 1995 - IPC

FIELD: oil extracting industry. SUBSTANCE: apparatus has additional hollow plunger with seat and reverse valve. Reducer has radial hole and reverse valve is located in radial hole of reducer. In the case, hollow plunger with seat form with reducer cavity, hydraulically connected with cavity of filter and through reverse valve with cavity of borehole. In process of sucker rod pump operation forced reciprocal motion of spiral spring coils from filter takes place, opening filtering slot with washing mechanical particles out of inner cavity of filter. EFFECT: apparatus for gas and sand separation during oil extraction is used in oil extracting industry. 3 dwg