Patent ID: 7316270

Claim:
An oil artificial lift pumping unit comprising: a motor, said motor comprising a casing, a stator, and a mover, said mover having an inner tube, which has one end connected to an oil delivery pipe and an opposite end connected to a first connector, which has a first oil hole, said stator having a power cable connected to a power supply for causing said mover and the first connector to move alternately up and down; and a pump, said pump comprising a barrel, an oil suction pipe mounted in said barrel, said oil suction pipe having a top end having a second threaded connector, which has a second oil hole, and a bottom end connected to an inner sleeve, which has installed therein a mixing valve, an axially movable valve and a piston, an outer sleeve having a bottom end provided with a bottom one-way oil intake valve, said oil suction pipe matching with an inner socket to hold a one-way mixing flow intake valve, said inner socket and said oil suction pipe defining an oil passage, which is disposed in communication with a piston upper chamber that is defined in between said outer sleeve and said inner sleeve, said piston upper chamber having a third oil hole disposed in communication with said mixing valve; wherein when said mover of said motor is operated to reciprocate said oil suction pipe, crude oil is alternately pumped through said one-way bottom oil intake valve and said one-way mixing flow intake valve to alternately pass through said axially movable valve and said mixing valve to the ground surface.