A structure and method for oil and gas mixed transportation suitable for large flow and wide range of gas-oil ratio

Abstract

The invention relates to the field of oil-gas machines, in particular to an oil-gas mixed conveying structure and method suitable for the large flow and wide-range gas-oil ratio. The method comprisesthe following steps that a petroleum and associated gas mixture exploited at an upstream oil well enters a heating furnace to be heated and afterwards enters an inlet buffer tank to be subjected to gas-liquid separation; part of separated-out gas serves as fuel gas of the heating furnace, the other part of the separated-out gas enters an inlet of a dual-screw pump and is mixed with liquid, boostedby a liquid feeding pump, at the bottom of a separator to enter the dual-screw pump, the pressure is increased, then the mixture enters the heating furnace to be subjected to water-curing treatment and then enters an outlet buffer tank, and the pressurized oil-gas mixture is delivered out; and when the amount of liquid fed to the inlet is decreased and the liquid level of the inlet buffer tank drops continuously, the outlet buffer tank starts to feed liquid back to the inlet buffer tank, cyclic liquid supplementation for the system is achieved, and normal operation of the dual-screw pump is ensured. The oil-gas mixed conveying structure and method can adapt to the mixed conveying demand of the large flow and wide-range gas-oil ratio.

Description

technical field [0001] The invention relates to the field of oil and gas machinery, in particular to an oil and gas mixed transportation structure and method suitable for large flow and wide range of gas-oil ratio. Background technique [0002] In the process of oil extraction, oil-associated gas overflows. In the past, production only focused on oil extraction and transportation, and the associated gas was generally discharged on-site. With the improvement of safety production and environmental protection requirements, and petroleum-associated gas is also a very valuable resource, it is necessary to transport and process petroleum-associated gas while exploiting oil. [0003] Petroleum and associated gas are in two phases of liquid and gas respectively. Existing compressors and pumps generally can only transport media in one phase. In the past, two pipelines were laid between the oil well and the processing station. Transport liquid petroleum and gaseous associated gas. H...

AI Technical Summary

Problems solved by technology

The main reason is that the device cannot operate in a wide range of gas-oil ratio conditions. When the gas volume is too large, the booster equipment cannot process all the gas

The main problem of the existing technology is that it cannot meet the changing working conditions and feeding requirements on site. Simply put, it is immature and unreliable

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