In the process of oilfield waterflood development, the rate of water injection is an important embodiment of water injection management level, which is an important parameter that not only reflects the formation capacity, but also reflects the production capacity of water injection equipment. Because of the influence of injection water quality, production environment, management level and other factors, the water injection flowmeter needs to be calibrated regularly to ensure the accuracy of measurement in the actual water injection process. In Huabei Oilfield, the flowmeters used in the production are removable for calibration, which has problems such as the difficulties when dismantling and mounting the flowmeters for calibration outside, easily being damaged in transit and low calibration efficiency. In order to solve above problems, a set of on-line calibration skid-mounted device for water injection flowmeter is developed, which realizes on-line calibration for water injection flowmeter and meets the actual demands of water injection flowmeter calibration in oil field.

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