Swirl side suction oil pump

Abstract

The invention provides a swirl side suction oil pump, including a suction oil pump, which is characterized in that the lower end of the suction oil pump is connected with a swirl separation cylinder, and the lower end of the swirl separation cylinder is connected with a sand settling cylinder, and the swirl separation cylinder It includes an outer cylinder and an inner cylinder. The upper and lower sides of the outer cylinder are respectively connected with the suction oil pump and the sand chamber. An annular flow channel and an oil chamber are formed in the circumferential direction and above, and a tangential oil inlet hole connected to the lower inner cavity of the inner cylinder is opened under the outer cylinder. A one-way ball valve is installed in the inner cavity of the inner cylinder. The side wall of the inner cylinder above the ball valve is provided with a lateral oil outlet hole communicating with the annular flow channel. Break through the existing direct pumping method, enter the liquid from the side of the pump body, use rotary pumping, use the principle of centrifugal force to separate the sand and oil, and prevent the sand-containing liquid from directly entering the piston and the floating valve, causing the piston to be stuck and the valve to be fixed Blockage, puncture of fixed valve ball seat, etc. occur frequently.

Description

technical field [0001] The invention relates to an oil well pump in the field of oil exploitation. Background technique [0002] The oil well pump is an indispensable equipment for the oil production of the pumping well, and what the oil well pump used at present adopts the direct suction type oil well pump. This type of oil pump has been dominated by simple design, easy processing and convenient use in the early stage of oilfield exploitation, and it is still playing an important role. However, in the middle and late stages of oilfield exploitation, the well conditions of oil wells are constantly changing. In particular, the emergence of sand production at the bottom of the well and sand buried oil layers have made mining more difficult, resulting in frequent occurrences of the current direct pumping pump piston being stuck, the fixed valve being blocked, and the ball seat of the fixed valve being pierced. . Therefore, the use of reasonable and scientific oil production t...

AI Technical Summary

Problems solved by technology

This type of oil pump has been dominated by simple design, easy processing and convenient use in the early stage of oilfield exploitation, and it is still playing an important role. However, in the middle and late stages of oilfield exploitation, the well conditions of oil wells are constantly changing. In particular, the emergence of sand production at the bottom of the well and sand buried oil layers have made mining more difficult, resulting in frequent occurrences of the current direct pumping pump piston being stuck, the fixed valve being blocked, and the ball seat of the fixed valve being pierced.

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