PLANT TO LIFT FLUID FROM WELL, PROCESS OF ITS OPERATION, WELL PUMP AND HYDRAULIC DRIVE INCORPORATED IN ITS MIX Russian patent published in 1998 - IPC

FIELD: oil industry, lifting of crude oil or evacuation of strata waters. SUBSTANCE: plant includes plunger, hole packer, base and frame. Frame carries drum. tape is wound spirally on it and is connected to plunger. Base have guides. Frame is mounted for movement along guides to keep vertical position of tape over section between hole packer and point of entrance of tape on to drum. Process involves unreeling and reeling of tape on to drum. Tape is joined to plunger, it is forced to take vertical position between hole entrance and point of tape going off/coming on to drum. Well pump has plunger composed of dies having $$$ cross-section and strap having $$$ shape. Hydraulic drive includes fluid-power motor connected to drum. Plant incorporates reversible hydraulic pump, hydraulic distributor and hydraulic braking mechanism. Mentioned units form closed hydraulic system with aids preventing overloading of tape. EFFECT: increased reliability, prolonged service life and improved operational safety of plant. 28 cl, 14 dwg