Adjustable gas-liquid centrifugal separator and separating method

#The invention relates to a gas-liquid on-line separating apparatus and method, and in particular, to an apparatus and method adapted for gas-liquid on-line separating an oil-gas-water multi-phase flow of oil field.

#At present, a conventional separating and metering method is mostly used to meter the productions of oil wells, that is, the products of oil wells are delivered into a metering separator, where they are separated into three single-phase fluids of oil, gas and water, and then each single-phase fluid is metered to obtain respective production of oil, gas and water, but such system is huge, the separator and its related accessories have tens of tons in weight and occupy an area in several hundreds of square meters, to make the maintenance and management quite complex and miscellaneous. In recent years an oil-gas-water multi-phase flow rate measuring apparatus is disclosed and can measure the flow rate of each phase of oil, gas and water without necessity for separating oil, gas and water of oil wells, it has changed the conventional separating and metering manner still used at present. This apparatus is light in weight and small in volume, and generally has 0.5-2 ton in weight and occupies about 2 m2 in area, so that the investment in the well measurement is reduced, and the on-line, continuous and automatic measurement control of a single well is realized.

#However, since the oil-gas-water multi-phase flow in the pipe is an extreme complex random process having multi-variables, various flow states, such as bubble flow, circular flow, layered flow, interrupted flow and etc., different phase components, such as high gas content, low gas content, high water content, low water content and etc.; and their different random and irregular combinations make the multiphase flow rate measuring technology have a great limitation, and in particular, it can not be adapted to the measurement for the oil wells having high gas content. Thus, to a great extent, the extension and use of the multiphase flow rate measuring apparatus in the production practice is limited.

#FIG. 1 is a schematic diagram of an embodiment of an adjustable type guide vortex gas-liquid separating apparatus of the invention;

#FIG. 2 is a main flowchart of a guide vortex gas-liquid separating method of the invention.

#Hereinafter, the embodiments of the invention are described in detail with reference to the appended drawings.

#FIG. 1 shows an embodiment of an adjustable type guide vortex gas-liquid separating apparatus of the invention.

#A reference number 1 represents an adjusting valve; 2 represents a flange cover gas circuit exit pipe section; 3 represents a mist eliminator; 4 represents a flange cover; 5 represents an inlet flange pipe section; 6 represents a vortex flow guide spiral pipe, the pitch and the geometrical section shape of which are not limited; 7 represents liquid discharge holes, but it is not limited that the holes are open or not; 8 represents a case; 9 represents a level meter; 10 represents a liquid circuit exit connection flange; 11 represents a gas through flow pipe; 12 represents gas discharge holes, but it is not limited that the holes are open or not; 13 represents a gas circuit connection flange; and 14 represents a γ ray phase volume fraction meter.