Dynamic test device and method for thread sealing performance of oil pipe adapter

Abstract

The invention relates to a dynamic test device and method for the thread sealing performance of an oil pipe adapter in the technical field of petroleum oil pipelines. The test device comprises a sliding rail, a support base, an oil pipe clamp, an oil pipe test piece, a coupling, a core rod, seal assemblies at two ends of the oil pipe test piece, a vibration exciter, a bending moment loading module, a static load stretching module, a pressurization module, a top plate and a leakage tester. The test device is characterized in that the core rod is placed inside the oil pipe test piece to constitute an annular cavity, and then the two ends are sealed; a pressurization machine pressurizes the annular cavity; the vibration exciter, the bending moment loading module and the static load stretching module respectively apply a vibration load, a bending moment load and an axial stretching load to the oil pipe test piece. The dynamic test device and method can test the seal performance of an oil pipe under composite loads of inner pressure, stretching, bending moment and vibration loads; the technical scheme of the invention especially takes the dynamic factors into account and livingly simulates actual service conditions of the oil pipe; the test result is of great significance for guidance. The test device has a simple structure and good operationality.

Description

technical field [0001] The invention relates to a dynamic testing device and method for thread sealing performance of oil pipe joints in the technical field of oil pipes. Background technique [0002] In the process of oil and natural gas exploitation, the service environment of oil and casing strings is harsh, the stress conditions are complex, and oil casing failure accidents occur frequently. Among them, the failure of the gas seal of the thread of the oil pipe joint is the most important form of failure. Failure of the seal may lead to pressure in the annulus, causing serious production safety risks. At present, with the increase of deep wells, deviated wells, and high-temperature and high-pressure wells, the increasingly harsh service conditions pose severe challenges to the sealing performance of tubing joint threads. Therefore, the evaluation of the thread sealing performance of tubing joints has always been a key research issue that affects the safety and life of oi...

AI Technical Summary

Problems solved by technology

The existing main effective evaluation method is based on the international standard ISO13679 indoor sealing test method, but usually only considers static load factors such as tension and bending, and does not take into account the important factor of vibration load that is ubiquitous in the production process. The essence of the thread seal failure of the oil pipe joint is the result of the joint action of static load and dynamic load factors

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