DEEP-WELL PUMP DRIVE Russian patent published in 2009 - IPC F04B47/02 

FIELD: engines and pumps.

SUBSTANCE: invention relates to oil production. Proposed drive comprises drive link shaft, drum fitted on support, circular housing consisting of base and cover with branch pipe communicating with pump-compressor pipe. Driving link shaft extension has coaxial gear with cylindrical ledge on free end face. Ledge diametre equals that of gear pitch line. There is lengthwise slot on the end face cylindrical surface. Gear wheel seats parallel to driving link shaft. Toothed concave and convex rims are arranged inside the housing. Coaxial barrels are arranged on faces of aforesaid rims. Two or more brackets are rigidly attached to the flat surface of base, the said brackets featuring arc-like concave stop. One end of concave stop is arranged above free end of cylindrical stop. Similar brackets support another arc-like convex stop. One end of convex stop is arranged above free end face of driving link shaft cylindrical ledge. Arc-like stop is arranged coaxially with latter and on brackets. There is a plate with longitudinal slot arranged between arc-like stops and housing cover, and rigidly attached to adjacent cheek of the drum. Slot outer surface width is smaller than slot bottom width. Additional flexible element is wound up on the drum. Additional hole with vertical branch pipe is arranged on the housing cover, in symmetry with the hole with flexible element. The said vertical branch pipe is tightly jointed to vertical cylinder with counterweight. The latter is jointed to second end of additional flexible element. There are some other versions of drive design.

EFFECT: higher drive efficiency.

11 cl, 16 dwg