FIELD: pumps.
SUBSTANCE: group of inventions relates to pump systems, and more specifically to methods and systems for selective evacuation of fluid medium from well casing. Pump system comprises linear motor with housing and stator. Stator is connected to the motor housing and contains a landing path with the primary magnetic unit. Motor shaft is electrically connected to stator and comprises working part with secondary magnetic assembly having first diameter. There is the first pump connected to the linear electric motor. Said pump comprises housing connected with motor housing and piston connected with motor shaft and having second diameter. Second diameter differs from said first diameter. Said piston is made with possibility of reciprocal movement inside said pump housing between first and second positions. There is a seal connected to the motor housing and the pump housing and configured to direct the fluid into the pump housing when the pump piston is in said first position and directing the fluid from the pump housing when the pump piston is in said second position.
EFFECT: technical result is higher reliability of pump system.
20 cl, 18 dwg
