Erosion Damage Behavior of High-pressure Manifold in Shale Gas Fracturing
Erosion wear of structural materials is a prevalent failure mode in the oil and gas industry.During hydraulic fracturing of shale gas,the high-pressure manifold is continuously subjected to high-speed impact from solid proppant particles in the fracturing fluid flowing through the pipe.Under harsh operating conditions,the vulnerable components of the high-pressure manifold can be easily damaged by ero-sion wear,leading to pipe perforation or even rupture.However,there remains a lack of complete understanding regarding the erosion mechanism of high-pressure manifold,which hinders accurate evaluation and prediction of erosion behavior.In this study,we conducted a solid-liquid two-phase flow erosion wear test on materials used in high-pressure manifolds for hydraulic fracturing.We analyzed how parame-ters such as impact angle and flow velocity influence the erosion wear of target materials when exposed to sand-carrying fluids.Subsequent-ly,based on the test condition parameters,we performed simulations to investigate the dynamics of solid-particle erosion processes and ana-lyzed material micromechanics under different conditions.The results show that the impact angle and flow velocity will seriously affect the erosion wear degree,and the erosion rate will increase first and then decrease with the increase of impact angle.With the increase of the im-pact angle,the contact stress components at the target material change greatly,resulting in the difference in the microscopic damage mor-phology of the target such as cutting,lip and pit caused by the impact particles at different angles.With the increase of flow velocity,the erosion rate increases as a power function due to the significant increase in the range and stress value of the target material contact stress zone.
erosion wearhydraulic fracturinghigh-pressure manifoldsolid-liquid two-phase flowshale gas
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维普
