Downhole three-phase separating device

Abstract

The invention relates to a downhole three-phase separating device which comprises a two-stage bubble-breaking gas-liquid separating mechanism and cyclone sand settling three-phase separating mechanism. Bubble breaking separation is organically combined with gravity cyclone sand settling three-phase separation, multi-phase flow output liquid is subjected to gas-liquid separation through the bubble-breaking gas-liquid separating mechanism and then subjected to solid-gas-liquid separation through the cyclone sand settling separating mechanism, during the process, heavy solid phase is thrown to the periphery under centrifugal force and gravity and settled to the bottom under gravity, light liquid enters a central pipe, the lightest gas is emitted upwards along gas guide holes to a gas collecting cavity, and three-phase multi-stage separation is achieved. By the downhole three-phase separating device suitable for output liquid with wider vapor liquid ratio range, mud and sand discharge of oil wells can be dealt with effectively, and for oil wells with sufficient stratum liquid supply capacity, pumping effect can be increased, oil well yield can be increased, pump detection cycle can be prolonged, and production effectiveness can be increased.

Description

1. Technical field: [0001] The invention relates to a solid, liquid and gas three-phase separation device installed under an oil pump in an oil well in an oil field to process the oil well output liquid, especially a modular downhole with two-stage foam breaking separation and sand settling functions Three-phase separation device. 2. Background technology: [0002] The existing downhole separation devices mainly include gas-liquid separation, solid-liquid separation and solid-liquid-gas three-phase separation from different separation media. There are many kinds of downhole separation devices. In the early days, there were gravity separation devices with pipe and casing, and there are also cyclone centrifugal separation devices that can separate gas and liquid, and at the same time separate solid phase and settle solid phase, because the gravity separation of gas and liquid is related to its downlink distance. In order to achieve the ideal separation effect, the gravity sep...

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Problems solved by technology

[0003] At present, there are mainly physical treatment and chemical treatment for oil well anti-wax, anti-scaling and anti-corrosion prevention. The physical method has a strong magnetic anti-wax and anti-scaling device, which has a protective effect but the protection distance is short, and the phenomenon of high-temperature demagnetization of strong magnetic materials will reduce its effect. Effect, the chemical treatment method is to fill the anti-wax, anti-scaling and anti-corrosion chemical agents in the anti-wax, anti-scaling and anti-corrosion device. This method has a certain effect, but with the consumption and loss of these chemicals, the control effect will be weakened and its protection The time will also be shortened, and it will also have adverse effects on the crude oil separation and refining equipment in the later stage. In addition, the cathodic protector that protects the main body by sacrificing the anode material is mainly aimed at anti-corrosion, and the protection distance is limited and its own consumption is serious.

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