SLIME AND SAND COLLECTOR Russian patent published in 1994 - IPC

FIELD: gas and oil production. SUBSTANCE: space of body of slime and sand collector is connected to tube feeding slime and sand and to discharge branch pipe. Tube feeding slime and sand is provided with check cut-off valve. Annular space hydraulically connected through filtering unit to slime collecting zone and to outside space through check drain valve is made concentric on discharge branch pipe. In process of backward flushing filing of slime collecting zone of body takes place. Collector may have several sections. EFFECT: simplified design. 2 dwg