Abstract: A wellbore jet pump includes a nozzle body with a tapering nozzle passage therein and a pump body with a main passage that receives the nozzle body therein so as to define within the main passage (i) an intake section surrounding the nozzle body, (ii) a mixing section immediately above the nozzle body, and (iii) a diffuser section diverging upwardly from the mixing section. A bypass conduit directs a working fluid downwardly alongside the pump body and upwardly into one of the nozzle passage or the intake section so that produced fluids are drawn into the other one of the nozzle passage or the intake section for subsequent mixing of the working fluid and the produced fluid in the mixing section. In this manner both the working and produced fluids are accelerated before entering the mixing section to increase pump efficiency.

Abstract: This invention relates to improvements and a new design for jet pumps used in the production or cleaning of oil wells. The present disclosure reveals improvements to Jet Pump wear characteristics, flow patterns, and efficiencies resulting in an improved method of producing fluid and or sand from an oil well using a Jet Pump.

Abstract: A pump jack drive apparatus includes a pair of hydraulic cylinders connected to a walking beam of the pump jack for reciprocating the horsehead, and a pair of microswitches or proximity switches which are closed by the walking beam at the limits of the stroke thereof for controlling such stroke. The cylinders are driven and controlled by a pump and control unit which includes a valve for feeding hydraulic fluid to one or the other of the hydraulic cylinders, a control cylinder for controlling the valve, and two solenoid operated control valves for controlling movement of the control cylinder in response to closing of the switches by the walking beam.