METHOD OF MEASURING WELL FLOW RATE OF OIL WELL PRODUCTS AND DEVICE TO THIS END Russian patent published in 2015 - IPC E21B47/10 

FIELD: oil and gas industry.

SUBSTANCE: out of oil well products in the form of oil-water mixture clean water is extracted by the system of siphons due to creation of hydraulic gate for oil and emulsion flow. Oil and emulsion passing through the hydraulic gate are accumulated by switching and creating hydraulic gate for clean water flow for the purpose of further identification by density gage and measurement by volumetric displacement meter. When liquid is accumulated up to certain level hydraulic gate is created for gas flow. Under action of increasing gas pressure liquid is squeezed from settlers when combined flow-rate controller is open. When liquids level drops in settlers the hydraulic gate is removed and gas flow is started through combined flow gage, combined flow-rate controller. Pressure and temperature is measured during discharge to common header. Volume-flow rate is measured for components of oil, emulsion, water and gas. Pressure of the medium is maintained within the specified interval of its values. Parameters are calculated for measurement process and flow rate of oil wells, at that ratios of liquid or gas flow rates to ascending speed of oil and emulsion bubbles in water or gas bubbles in liquid are ensured by selecting cross-section of hydraulic gate tubing. Arrangement where gas line comprises gas flow meter and gas flow regulator. Gas separator in the lower part is coupled to the common head by combined flow gage, combined flow-rate controller and density gage through a buffer tank, which is connected to a separating tank by gas pipeline and liquid pipeline. Separating tank and buffer tank interconnected by gas pipeline form direct and opposite siphon while separating tank and buffer tank interconnected by liquid pipeline form opposite siphon. The buffer tank is coupled to the common head by measuring line. The separating tank is coupled to the main gas line by gas pipeline and to gas separator through a vertical settler and pipeline forming two direct siphons and two opposite siphons. Bafflers are installed in gas separator between the zone of vertical settler and vertical pipeline. The microprocessor is coupled to gas flow meter, gas flow regulator, combined flow gage, combined flow-rate controller and density gage.

EFFECT: improved quality and efficiency of flow rate measurement for oil well products.

2 cl, 1 dwg