Abstract: An artificial lifting system is disclosed. The artificial lifting system comprises an elongated cylinder fixed to a base or ground. The elongated cylinder receives a piston rod axially movable therein. The piston rod engages a downhole rod pump for driving the rod pump reciprocating uphole and downhole to pump downhole fluid to the surface. A control unit controls the axial movement of the piston rod, and automatically adjust the system operation to adapt to drift of the top and bottom stop positions of the piston rod. In an alternative embodiment, the system further comprises a dump valve controlled by the control unit to prevent over-stroke. In another embodiment, the system further comprises a chemical injection unit for injecting treatment fluid to a wellbore under the control of the control unit.

Abstract: A power management circuit for a multi-phase alternating current (AC) power supply is provided to manage a single phase bad, connected thereto, during a brownout condition. The management circuit is configured to switch the single phase electrical bad from an affected conductor of the AC power supply and to connect the single phase electrical bad between two unaffected conductors of the AC power supply thereby ensuring continued supply of voltage to the single phase electrical load.

Abstract: An artificial lifting system is disclosed. The artificial lifting system comprises an elongated cylinder fixed to a base or ground. The elongated cylinder receives a piston rod axially movable therein. The piston rod engages a downhole rod pump for driving the rod pump reciprocating uphole and downhole to pump downhole fluid to the surface. A control unit controls the axial movement of the piston rod, and automatically adjust the system operation to adapt to drift of the top and bottom stop positions of the piston rod. In an alternative embodiment, the system further comprises a dump valve controlled by the control unit to prevent over-stroke. In another embodiment, the system further comprises a chemical injection unit for injecting treatment fluid to a wellbore under the control of the control unit.

Abstract: The disclosed invention provides intelligent adaptive control for optimization of production output, energy efficiency and safety of a linear reciprocating long stroke hydraulic lift system, for use at the surface of oil and gas wells to extract fluids or gas after free flowing stopped due to natural decline of reservoir pressure. The hydraulic pump and its adaptive control system introduced in this invention are capable of optimizing its production capacity by varying multiple operating parameters, including its stroking length and speed characteristics continuously and instantaneously at any point. Merits and benefits of this invention include significant increase in production efficiency, improved durability and longevity of the pumping equipment, significant power consumption savings and an ability to adapt effectively to changing well conditions.