Gas-liquid mixed injection device used for thickened oil double injecting and thin extracting

Abstract

The invention relates to a gas-liquid mixed injection device used for thickened oil double injecting and thin extracting. According to the technical scheme, the gas-liquid mixed injection device usedfor thickened oil double injecting and thin extracting comprises a double-head liquid injection device and a gas-liquid mixed injection device. A liquid injection device body of the double-head liquidinjection device is of a ring-shaped sleeve structure, and liquid injection channels are arranged at the upper portion and the lower portion of the liquid injection device body correspondingly. A sealed steel ball and a supporting spring are arranged in an inner cavity of the liquid injection channel, a liquid discharging channel is arranged between an upper liquid injection device liquid injection channel and a lower liquid injection device liquid injection channel, and the other end of the liquid discharging channel communicates with the gas-liquid mixed injection device. One end of a liquid inlet slotting pipe of the gas-liquid injection device is connected to the bottom of an oil well pump cylinder, a gas-liquid homogenizing chamber is formed between a gas diversion plate and a gas-liquid homogenizing plate, and a multistage capillary tube is arranged below the gas-liquid homogenizing plate to communicate with a lower cavity body of the mixed injection device. The gas-liquid mixedinjection device used for thickened oil double injecting and thin extracting has the beneficial effects that due to the fact that the gas-liquid mixed injection device used for thickened oil double injecting and thin extracting is a special gas-liquid mixed injection device, thickened oil double injecting and thin extracting can be achieved, thickened oil can be changed qualitatively in an oil reservoir, in other words, the physical fluidity of the thickened oil becomes stronger, the work effect is greatly improved, and the work cycle is prolonged by 2-3 times.

Description

technical field [0001] The invention relates to a heavy oil recovery device and method, in particular to a heavy oil double-injection and thin-gas-liquid mixed injection device. Background technique [0002] In the process of petroleum exploitation, the molecular force of heavy oil due to the molecular weight is relatively large, the freezing point is high, and the viscosity is high, so it is not easy to exploit. At present, the methods of heavy oil exploitation include hot water cycle viscosity reduction, electric heating viscosity reduction, and burning oil layers. , hot water flooding, steam huff and puff and steam flooding, chemical methods, etc. At present, the methods used are mainly gas injection, injecting high-temperature CO2, and extracting some of the thinner heavy oil in the way of braising the well, but During the mining process, wax deposition will occur due to temperature changes, which brings great difficulties to mining. [0003] Chinese Patent Publication ...

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Problems solved by technology

[0002] In the process of petroleum exploitation, the molecular force of heavy oil due to the molecular weight is relatively large, the freezing point is high, and the viscosity is high, so it is not easy to be exploited. At present, the methods of heavy oil exploitation include hot water cycle viscosity reduction, electric heating viscosity reduction, and burning oil layers. , hot water flooding, steam huff and puff and steam flooding, chemical methods, etc. At present, the methods used are mainly gas injection, high-temperature CO2 injection, and the production of some heavy oils that are relatively thin in heavy oils by means of stewing wells. During the mining process, wax deposition will occur due to temperature changes, which brings great difficulties to mining.

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