DEVICE FOR RECOVERING HIGH-VISCOUS OIL FROM WELL Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: device for recovering high-viscous oil has drive unit, string of lifting pipes, driving sprocket, flexible endless chain inside string of lifting pipes, string of pump-compressor pipes with smooth pulley at its end. Flexible chain functions as plunger and is made up of belt with perforated rectangular openings. Lifting pipes are formed by two flat belts. These belts are embraced by clamping yokes and fastened on string of pump-compressor pipes and at well head. Aforesaid embodiment of device improves reliability of operation and simplifies mounting and dismantling procedures. EFFECT: higher efficiency. 4 dwg