Upper layer high-pressure negative-pressure separated exploiting device

Abstract

The invention discloses an upper layer high-pressure negative-pressure separated exploiting device. The upper layer high-pressure negative-pressure separated exploiting device comprises a main body, a valve seat, a ball valve, a throat pipe and a pressing cap, wherein a first eccentric through hole and a second eccentric through hole are formed in the top surface of the main body, a central through hole is formed in the bottom surface of the main body, and the first eccentric through hole and the second eccentric through hole communicate with the central through hole; the valve seat and the ball vale are arranged at the end of the top end of the first eccentric through hole and the communicating part between the first eccentric through hole and the central through hole correspondingly, a communicating hole formed in the portion between the first eccentric through hole and the second eccentric through hole is formed above the ball valve; the throat pipe is installed at the bottom of the second eccentric through hole in an inserted mode, the inner diameter of the bottom end of the throat pipe is increased, and the bottom end of the throat pipe is provided with a spraying nozzle, and thus a central hole channel of the throat pipe, the second eccentric trough hole and a central hole channel are connected sequentially; the pressing cap is arranged on the inner wall of the lower side of the main body, a third eccentric through hole and a fourth eccentric through hole are formed in the top surface of the pressing cap, and the fourth eccentric through hole communicates with an overflowing hole which is formed in the side wall of the lower side of the main body. According to the upper layer high-pressure negative-pressure separated exploiting device, the through capability of fluid in the low pressure area is maximally improved, the application range of interlayer pressure differences of tools is enlarged, and the exploiting efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to an upper-layer high-pressure negative-pressure separate production device. Background technique [0002] With the passage of oilfield development time, most of the oil wells have entered the stage of high recovery, and the difficulty of improving the recovery rate is increasing year by year, and the difficulty of measures is increasing. During the oilfield development process in recent years, single-layer production or multi-layer combined production is the main method. After multi-layer commingled production, the production of some oil wells did not increase as expected, and there were even extreme cases of negative production growth. Usually, the interlayer pressure difference between the original mining layer and the newly opened layer is as high as 5MPa, and the interlayer contradiction is very prominent, resulting in the phenomenon of backflow from the high pre...

AI Technical Summary

Problems solved by technology

However, the existing equipment has the problem of complex structure, small negative pressure, and small fluid channel size in the low-pressure area, which can adapt to the small interlayer pressure difference (mostly within 1MPa). In the case of large interlayer pressure difference, It will block the low-pressure layer, the scope of application is limited, it cannot meet the existing needs, and it has not been widely used in oil fields

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