Quick sand-prevention oil extraction device

Abstract

The invention discloses a quick sand-prevention oil extraction device which comprises an oil tube and an oil well pump, wherein an oil pumping rod is connected to the lower end of the oil well pump; a filtering cylinder is connected to the lower end of the oil tube; a filtering net is disposed on the outer wall of the lower half section of the filtering cylinder; a movable cylinder passes through the bottom end of the filtering cylinder; inclined flow ways communicating with the movable cylinder are formed in two sides of the movable cylinder; high baffles and low baffles are fixed on the inclined flow ways; a floating ball is disposed in the movable cylinder in a sliding manner; an inner conical face is formed in the inner wall of the lower end of the movable cylinder; and a maximum inner diameter of the inner conical face is smaller than a diameter of the floating ball. When the oil well pump conducts a down stroke, the floating ball can move downwards to the inner conical face along the inner wall of the movable cylinder and can then seal the movable cylinder; an oil liquid in the filtering cylinder is stationary, and gravels contained in the oil liquid can be precipitated, falls into a precipitation tank between the low baffles and the high baffles and then slowly slides into the inclined flow ways to wait for next-time opening of the floating ball; and finally, blocking of the oil extraction tube pillar is avoided, and sand setting of the oil extraction tube pillar can be avoided.

Description

technical field [0001] The invention relates to a sucker rod, in particular to a rapid sand control oil production device. Background technique [0002] Affected by geological conditions, some oilfields have complex underground structures and belong to complex oil and gas areas with multiple reservoir types, multiple structures, multi-layer systems, and multiple crude oil properties. The underground sand content is large, and the crude oil produced contains a large amount of mud sand, leading to serious wear and tear of the oil production string, easy to block, resulting in the failure of the pump body, reducing the service life of the string, and the viscosity of the oil in different parts of the oil field is different, and the viscosity of the oil body has a negative impact on the oil production work. However, the current oil recovery work does not take into account the viscosity of the oil body, resulting in a lot of work that cannot be prevented. Contents of the invent...

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Problems solved by technology

[0002] Affected by geological conditions, some oilfields have complex underground structures and belong to complex oil and gas areas with multiple reservoir types, multiple structures, multi-layer systems, and multiple crude oil properties. The underground sand content is large, and the crude oil produced contains a large amount of mud sand, leading to serious wear and tear of the oil production string, easy to block, resulting in the failure of the pump body, reducing the service life of the string, and the viscosity of the oil in different parts of the oil field is different, and the viscosity of the oil body has a negative impact on the oil production work. However, the current oil production work does not take into account the viscosity of the oil body, resulting in a lot of work that cannot be prevented

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