Two-stroke pumping method and oil production device

A two-stroke pumping oil production device, comprising a pump body, wherein the oil production device further comprises:

• a central tube of a hollow structure, and the central tube is partially located in the pump body and coaxially arranged with the pump body;
• a traveling valve and a standing valve are arranged on a first side and a second side of the outer wall of the central tube respectively, and the traveling valve is arranged between the pump body and the central tube;
• the standing valve is located outside the pump body;
• the traveling valve and the standing valve are matched with the pump body and the central tube to form an oil pumping space;
• an oil pumping assembly is further arranged in the oil pumping space, and the oil pumping assembly axially moves in the oil pumping space in a reciprocating mode so that the traveling valve and the standing valve can be opened step by step to achieve oil pumping;
• wherein a bushing is arranged on the inner wall of the pump body, and the traveling valve and the oil pumping assembly are arranged between the bushing and the central tube;
• wherein the traveling valve comprises a traveling valve cover and a traveling valve core, the traveling valve cover is fixed on the bushing, and the traveling valve cover is provided with a first stop ring and a first protrusion in a direction facing the central tube;
• an oil hole is formed in the first stop ring, and the first stop ring and the first protrusion are arranged at intervals to form a first interval space;
• the traveling valve core is fixed to the outer wall of the central tube and located in the first interval space;
• and the traveling valve core can move in the first interval space and can be in sealing contact with the first protrusion;
• and
• wherein the oil pumping assembly comprises a plunger fixed on the bushing and one end of the plunger is fixed on the traveling valve cover in threaded connection;
• the plunger is provided with a trapezoidal protrusion in the direction facing the central tube;
• the oil pumping assembly further comprises a first push block and a second push block which are fixed on the central tube, the first push block is located on the first side of the trapezoidal protrusion, and an oil hole is formed in the first push block;
• the second push block is located on the second side of the trapezoidal protrusion;
• due to the movement of the central tube in a first direction, the first push block and the second push block are in sealing contact with a bevel edge of the trapezoidal protrusion respectively.