The invention provides a huff-and-puff
oil production device with a submersible directly-driven
screw pump. The huff-and-puff
oil production device comprises an underground automatic water injection switch for realizing water injection and
oil production channel switching and a submersible directly-driven
screw pump, wherein a liquid outlet in the upper end of the underground automatic water injection switch is connected with an oil
pipe, and a liquid inlet in the lower end of the underground automatic water injection switch is connected with an oil outlet in the upper end of the submersible directly-driven
screw pump through the oil
pipe; the submersible directly-driven screw pump comprises a screw pump, a flexible shaft, an upper protect tor, a lower protector, a submersible motor and a centralizer which are non-coaxially connected from top to bottom; the upper end of the screw pump is connected with the lower end of the underground automatic water injection switch; and the screw pump and the submersible motor are respectively electrically connected to a submersible cable outside a
wellhead. The huff-and-puff oil production device is free of repeatedly
tripping and has the characteristics of simple and convenient operation flow, high construction efficiency, safety, environment friendliness, low risk and the like; and due to the adoption of the lifting way, the huff-and-puff oil production device has the characteristics of low rotating speed and large torque and is suitable for a well with low liquid quantity, the eccentric wear of
pipe poles is eliminated, the maintenance-free period of an
oil well is prolonged, and the economic benefit can be effectively increased.