A mechanical automatic reversing double-well long-distance pumping unit

Abstract

The invention discloses a mechanical automatic-reversing double-well long-range oil pumping unit which comprises a walking beam. A horsehead is fixed to the right end of the walking beam, a support ismounted at the lower end of the walking beam, a fixing shaft is fixed to the left end of the walking beam, and a bearing seat is mounted at the lower end of the walking beam. A crossbeam is movably mounted at the lower end of the bearing seat, first cylinder bodies are fixedly welded to the upper end of the cross beam, and first pistons are mounted inside the first cylinder bodies; first piston rods are fixed to the upper ends of the first pistons, and bearings are welded to the upper ends of the first piston rods and movably connected with the fixing shaft; connecting rods are welded to thelower end of the cross beam and movably connected with balancing blocks, and the balancing blocks are movably connected with cranks; a buffer steel plate is mounted at the upper end of a base, and a buffer device is mounted at the upper end of the buffer steel plate and is composed of second cylinder bodies, second pistons, second piston rods, upper pressing plates and buffer springs; and a motoris fixed to the upper end of a supporting plate, and the cranks are movably connected with a transmission. Vibration generated by colliding a sliding sleeve is relieved, and damage, caused by vibration, of mechanical parts is prevented.

Description

technical field [0001] The invention relates to the technical field of pumping units, in particular to a mechanical automatic reversing double-well long-distance pumping unit. Background technique [0002] The pumping unit is a kind of machinery and equipment for oil extraction, commonly known as "kowtow machine". The oil is pumped out of the well by pressurizing. The sliding sleeve vibrates; at the same time, the positive check valve is closed, and the variable diameter piston assembly seals the oil. When the pumping unit downstrokes, the oil pipe elastically elongates and moves downward, driving the mechanical unblocking oil extractor to move downward, hitting the slide At the same time, the reverse check valve is partially closed, and the variable diameter piston assembly still blocks the annular oil passage of the oil sleeve, so that the area under the reverse check valve forms a high-pressure area, and this movement affects the oil circulation in the formation. Tao pro...

AI Technical Summary

Problems solved by technology

However, its disadvantage is that the impact force is too large, and the vibration generated is easy to cause damage to the mechanical parts and affect the service life of the mechanical parts.

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