US 2019/0376832 A1Published application

Method for verifying a flowmeter and device for the implementation thereof

Assignee"Oil and Gas Measurement Technology" Ltd

InventorsMihail Samuilovich GUREVICH, Andrey Vasilevich SAFONOV, Natalya Vasilevna DANILENKO

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Abstract

The invention relates to inspection and measuring technology for use in the calibration, verification and routine monitoring of the metrological characteristics of volume flow and mass flow meters and calibration rigs, primarily for petroleum and petroleum products. The special feature of the present method for monitoring the metrological characteristics of a flowmeter using a bidirectional prover is that the portion of the prover situated at the end of the path of travel of a ball and acting as an accelerator during the opposite movement of the ball is used on said path as an addition to the calibrated portion. The special feature of a bidirectional prover for implementing the present method is the installation of one or more detectors in a closed cross-section of the portion of the prover situated at the end of the travel path. The technical result is an increase in the accuracy and reliability of the measuring results, a reduction in the dimensions, mass and material intensity of the structure, a decrease in the duration of verification operations, and the mobility of the structure.

Claims4

Dependent claims

A method for calibration of a flowmeter using a bidirectional prover based on comparing liquid quantity data measured by the flowmeter and a quantity of liquid flowing through a calibrated section of the prover, which is taken as a standard unit of volume, during the time while a ball piston of the prover is passing the calibrated section, comprising multiple movements of the ball piston in direct and reverse directions with a flow of a verification liquid through a measuring pipe of the prover, sequentially connected to a measuring line, in which the flowmeter is installed, and wherein detectors are fixing the moments of the calibrated section start and end crossing by the ball piston during its each movement;

wherein a starting section of the ball piston movement in each of the directions is an acceleration section that is required for movement of the ball piston to reach a speed of a free flow at a given verification liquid flowrate, said method is characterized in that a section of the prover, located last along the present direction of the ball piston movement and been used as an acceleration section, serves also as an addition for the calibrated section during opposite movement.

Dependencies are inferred from the claim text.