Well bottom gas-liquid separator

Abstract

The invention provides a well bottom gas-liquid separator, which comprises a tubular part (21), a gas-liquid separation chamber (2), a through shaft motor (16) and a compressor (7), wherein a tube wall defining an air inlet (1) and an air outlet (81) is arranged around the tubular part (21), the air inlet (1) and the air outlet (81) have a certain axial distance, the gas-liquid separation chamber (2), the through shaft motor (16) and the compressor (7) are sequentially arranged in the tubular part (21) arranged between the air inlet and the air outlet on the same axial line, a liquid collecting convex plate (82) provided with a projected hole seals and covers the air outlet (81) formed in the top of the tubular part (21), a cavity formed between the tubular part (21) and an outer sleeve (11) forms a gravity separation part (20), the top of the gravity separation part (20) is sealed, an air inlet hole (13) is formed in a wall of the tubular part (21) corresponding to the compressor (7), a plurality of exhaust / liquid discharge holes (4) are formed in the tubular part (21) provided with the gas-liquid separation chamber (2) arranged in the middle part of the gravity separation part (20), a liquid collecting groove (5) is formed by a liquid blocking plate (15) and the outer sleeve (11) at the end, near the air inlet (1), of the gravity separation part (20), and a condensed liquid recovery pool (12) is positioned on the top of the gravity separation part (20).

Description

technical field [0001] The invention relates to the field of development of condensate gas reservoirs, conventional gas reservoirs and coal bed gas reservoirs, in particular to a gas-liquid separator at the bottom of a well. Background technique [0002] Condensate gas reservoirs are a special kind of gas reservoirs. There is an anti-condensation zone. When the temperature and pressure drop, the gas condenses into condensate oil. Therefore, many problems are often encountered in the development process: due to the change of formation temperature and pressure, Condensate gas condenses into condensate oil, which will cause formation blockage, reduce gas well productivity or even stop production; condensate gas condenses into condensate oil due to temperature and pressure changes in the wellbore, and condensate oil adheres to the wellbore, increasing friction, Reduce production capacity. When the liquid-carrying capacity of the gas well is insufficient, the condensate oil will ...

AI Technical Summary

Problems solved by technology

[0002] Condensate gas reservoirs are a special kind of gas reservoirs. There is an anti-condensation zone. When the temperature and pressure drop, the gas condenses into condensate oil. Therefore, many problems are often encountered in the development process: due to the change of formation temperature and pressure, Condensate gas condenses into condensate oil, which will cause formation blockage, reduce gas well productivity or even stop production; condensate gas condenses into condensate oil due to temperature and pressure changes in the wellbore, and condensate oil adheres to the wellbore, increasing friction, Reduce production capacity. When the liquid-carrying capacity of the gas well is insufficient, the condensate oil will fall back to the bottom of the well, which will also cause formation blockage, reduce the production capacity of the gas well or even stop production

However, this type of device is not fully applicable to condensate gas reservoirs. There is no bottomhole gas-liquid separation device specifically for condensate gas reservoirs. This device is specially added to the characteristics of condensate gas reservoirs in the wellbore to reverse condensation. Analysis liquid recovery equipment

[0004] Similar patents such as CN 101939505A, the device is only suitable for gas-liquid separation in conventional gas wells, and the centrifugal part only relies on the energy of the gas reservoir itself, and only considers the practicability in the case of sufficient energy. Once the energy of the gas reservoir is exhausted, the device cannot be used. Moreover, relying on its own energy to drive the separation effect is not good

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