Experimental device and experimental method for testing vibration of completion string of high-yield gas well

Abstract

The invention discloses an experimental device and experimental method for testing the vibration of the completion string of a high-yield gas well. The device includes an air compressor (1), a buffertank (2), a pressure regulating valve (3), a pressure gauge (4), a string (5), a packer (6), a fixing device (7), a camera (8), a computer (9), a strain gauge (10), a tail pipe model (11), a cable (12), and a screw clamp (13). The airflow generated by the air compressor (1) is regulated by the buffer tank (2) and pressure regulating valve (3) and then passes through the string (5). The flow rate is adjusted to simulate the same deformation effect of the high-yield gas state. The strain gauge (10) is installed on the string (5) to acquire the micro-strain of the string (5). In cooperation withthe high-speed camera (8), the vibration frequency and the deformation of the string is obtained by modal analysis. The experimental device is simple, restores the working state of the string in the high-yield gas well, and accurately measures the vibration frequency and the deformation degree of the string at different flow rates.

Description

technical field [0001] The invention relates to the fields of fluid mechanics and gas well safety monitoring, and relates to an experimental device and an experimental method for testing the vibration of a high-yield gas well completion pipe string. Background technique [0002] The completion string of high-yield oil and gas wells is a channel for high-speed gas circulation. Due to the supply, flow and pressure changes of the reservoir, the gas flow excitation of high-yield gas wells, and frequent well opening and closing operations, the string will vibrate violently under the action of dynamic load. In severe cases, even Oil well damage and oil and gas well safety accidents will occur. Therefore, the vibration of the pipe string is an extremely important research content. In order to understand the mechanical properties of the completion pipe string under the action of dynamic load, whether it can withstand the load intensity of the well completion operation, and whether ...

AI Technical Summary

Problems solved by technology

[0002] The completion string of high-yield oil and gas wells is a channel for high-speed gas circulation. Due to the supply, flow and pressure changes of the reservoir, the gas flow excitation of high-yield gas wells, and frequent well opening and closing operations, the string will vibrate violently under the action of dynamic load. In severe cases, even Oil well damage, oil and gas well safety accidents will occur

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