Method for gas liquid separation under oil well and uniform flow gas anchor of multiple sedimentation cups

Abstract

The invention relates to a downhole gas-liquid separation method of an oil well and a multi-settler cup iso-flow gas anchor, belonging to an oil field gas-liquid separation method and a gas-liquid separation device. The mixture flows through the settling cup first, and the separated gas gathers and rises along the outer wall of the settling cup; the liquid at the bottom of the settling cup flows into the center pipe through the liquid inlet hole and is then produced by the oil well pump; The total amount of liquid inflow is not more than half of the total capacity of all settling cups, and the inflow volume of all liquid inlet holes on the center tube should be approximately equal; the structure of the iso-flow air anchor with multiple settling cups is: the number of sets on the center tube A settling cup protector and settling cup, the outer contour of the settling cup is streamlined and rising; the center pipe has several liquid inlet holes near the inner bottom of each settling cup, and the flow area of ​​the liquid inlet hole is 0.2mm2 Between -7mm2; the lower part of the center pipe is connected to the well flushing valve.

Description

Technical field: [0001] The invention relates to an oil well downhole gas-liquid separation method and a multi-settler cup isoflow gas anchor, belonging to an oilfield oil well downhole gas-liquid separation method and a gas-liquid separation device. Background technique: [0002] The existing oil well lifting equipment in the oil field pumps a three-phase mixture of gas, oil and water when working in the downhole. The gas in the mixed liquid has a great influence on the efficiency of the artificial lift device. For example, when the submersion of the oil well pump is within the normal range (150---500m), the average pump efficiency is only 30-40%. All kinds of downhole gas-liquid separation devices--gas anchors studied in the past, let the mixed liquid enter the gas anchor in large quantities, and then pass through various flow channels of the gas anchor to allow the liquid to separate gas and liquid in a swirling flow. The separation efficiency of this method is extremely...

AI Technical Summary

Problems solved by technology

The separation efficiency of this method is extremely low, especially for fluids with downhole viscosity greater than 2mpa.s, it is difficult to achieve the purpose of improving pump efficiency and increasing production in field applications

At present, there is no method and device in the oil field that can effectively separate gas and liquid downhole when the pumping unit pumps downhole fluid, especially fluid with a viscosity greater than 2mpa.s

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