Single Well Crude Oil Meter Applied to Pumping Unit and Its Measuring Method

Abstract

The invention discloses a single-well crude oil meter and a metering method for a pumping unit. The single-well crude oil meter comprises a first cylinder, a second cylinder, an oil inlet pipeline, an oil outlet pipeline, a communicating pipeline, a first piston, a second piston, pressure guide liquid, a flow meter, a first electromagnetic valve, a third electromagnetic valve, a second electromagnetic valve and a fourth electromagnetic valve. The oil inlet pipeline and the oil outlet pipeline are connected with one end of the first cylinder and one end of the second cylinder; two ends of the communicating pipeline are respectively connected with the other end of the first cylinder and the other end of the second cylinder; the first piston is movably mounted in the first cylinder; the second piston is movably mounted in the second cylinder; the pressure guide liquid is arranged between the first piston and the second piston; the flow meter is used for detecting the flow of the pressure guide liquid which flows through the communicating pipeline; whether the oil inlet pipeline can be communicated with the first cylinder or not is controlled by the first electromagnetic valve; whether the oil inlet pipeline can be communicated with the second cylinder or not is controlled by the third electromagnetic valve; whether the oil outlet pipeline can be communicated with the first cylinder or not is controlled by the second electromagnetic valve; whether the oil outlet pipeline can be communicated with the second cylinder or not is controlled by the fourth electromagnetic valve. The single-well crude oil meter and the metering method have the advantages that crude oil metering errors can be reduced, and accordingly the accuracy of metering results can be improved.

Description

technical field [0001] The invention relates to a crude oil metering device, in particular to a single well crude oil meter applied to a pumping unit and a metering method thereof. Background technique [0002] Crude oil is the unprocessed oil extracted directly from oil wells. Crude oil is a viscous substance composed of various hydrocarbons. It is neither liquid nor solid nor gas. It sometimes forms as the temperature changes. In the state of semi-solid and semi-liquid, large quantities of crude oil are measured by pipelines in the prior art, and flowmeters are used for measurement. However, due to the above-mentioned properties of crude oil, the oil output measurement of pumping units (commonly known as knocking machines) has always been Problems that are difficult to solve in the existing technology, most flow sensors or flowmeters cannot run stably and reliably measure for a long time on crude oil pipelines, and a few flow instruments can achieve continuous measurement ...

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Problems solved by technology

[0002] Crude oil is the unprocessed oil extracted directly from oil wells. Crude oil is a viscous substance composed of various hydrocarbons. It is neither liquid nor solid nor gas. It sometimes forms as the temperature changes. In the state of semi-solid and semi-liquid, large quantities of crude oil are measured by pipelines in the prior art, and flowmeters are used for measurement. However, due to the above-mentioned properties of crude oil, the oil output measurement of pumping units (commonly known as knocking machines) has always been Problems that are difficult to solve in the existing technology, most flow sensors or flowmeters cannot run stably and reliably measure for a long time on crude oil pipelines, and a few flow instruments can achieve continuous measurement of crude oil, but the cost of the instruments is relatively high, such as Doppler ultrasonic sensors

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