MULTIPLIER-TYPE POWER DRIVING UNIT FOR OIL FIELD PLANT Russian patent published in 2008 - IPC F04B47/04 

FIELD: petroleum industry.

SUBSTANCE: unit is intended for application in the oil production industry for lifting formation fluid on the surface and relates to power equipment of oil field plants. The driving unit contains the driving piston - type hydraulic cylinder connected with the working multiplier to form a single structure. The driving unit also contains the accumulating multiplier, connected to the driving hydraulic cylinder to form 3D enclosed structure that operates basing on the principle of communicating vessels. The accumulating multiplier performs the function of equalising weight and at the same is used as a vessel for compressed air and liquid for re-using these agents in operation of the driving unit. Hydrostatic overpressure generated by the working multiplier, is transferred through the liquid to the piston of the driving hydraulic cylinder, which by the hydrostatic force via the flexible link drives the piston of the deep-well oil pump. The driving unit makes it possible to exclude counterweights out of the kinematical connection between the pump and the power driving unit.

EFFECT: possibility to exclude counterweights out of the kinematical connection between the pump and the power driving unit.

2 cl, 12 dwg