Method and device for ensuring measurement and adjustment precision of flow on water distributor

Abstract

The invention discloses a method and device for ensuring measurement and adjustment precision of flow on a water distributor. In the method, by stabilizing the posture of an instrument in an oil pipe, and allowing the instrument to be positioned in the middle of the oil pipe, the measurement and adjustment precision of flow is ensured. According to the invention, the center position and the posture stability of the instrument can be ensured when the instrument is used for adjustment and measurement on the water distributor, so that the precision and the stability of the measurement and adjustment of flow are improved; a spring piece type centralizer made of high elastic alloy is used, so that an ultrasonic flow sensor assembly bears force uniformly in the radial direction and is always positioned at the center of the oil pipe; and a structure that the spring piece type centralizer is arranged between a downstream transducer and an upstream transducer is adopted, so that the center position and the posture stability of the ultrasonic flow sensor assembly are ensured, and the length of the flow measurement and adjustment instrument is substantially shortened so as to reduce the well sticking accident, and thus the safety of on-site operation is improved. The centralizing method provided by the invention is suitable for centralizing the flow measurement and adjustment instrument in oil field wells, in particular, centralizing the ultrasonic flow measurement and adjustment instrument.

Description

technical field [0001] The invention relates to a method and a device for ensuring the accuracy of flow measurement and adjustment on a water distributor, and belongs to the technical field of flow measurement of downhole water distributors of oil wells. Background technique [0002] In the late stage of oilfield development, the method of precisely controlling formation water injection is generally used to enhance oil recovery. In order to accurately test and control the amount of water injection in the formation, it is required to place a centered ultrasonic flow sensor assembly in the upper and lower oil pipes of the water distributor. The flow difference measured by the upper and lower sensor assemblies is the water injection amount Q2 of the formation. The righting method determines the test posture of the instrument, and also determines the accuracy of flow measurement and adjustment. At present, the claw-type centralizer method is often used for righting. This method...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a method and device for ensuring the accuracy of flow measurement and adjustment on the water distributor, so as to solve the existing righting force in the prior art Small size, poor effect, resulting in unstable flow measurement and adjustment, and jumping phenomena, so as to overcome the shortcomings of the existing technology

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