Erosion damage experiment of screen pipe with multiple dimensions
Based on different flow velocity,the metal mesh cloth screen pipe of the uncertainty of the erosion failure mechanism,the first set of erosion experimental platforms with controllable flow rate and controllable sand ratio of CNOOC was established,erosion experiments of specimens of different dimensions from wire and metal mesh to full-size screen tubes were carried out,based on a large number of indoor erosion experimental data analysis,the influence mechanism of different flow rates on the erosion failure of the screen pipe is studied,and the multi-dimensional erosion law of the screen pipe under different flow rates is formed.The results show that the flow rate has great influence on the erosion failure of the screen pipe.At low flow rate(≤7 m/s),the erosion failure of the screen is not obvious,at medium flow rate(7～15 m/s),the erosion failure of the screen pipe is affected by the local"erosion hot spot"caused by the blockage of granular sand,and the erosion damage is obvious.At high flow velocity(≥ 15 m/s),the erosion failure of sieve tube is characterized by jet cutting effect,short failure time and large failure strength.On this basis,the anti-erosion recommended practice of offshore anti-sand screen pipe is formed,which guides the optimal selection of sieve pipe in offshore oilfield.The research results are helpful to analyze the failure possibility of the screen under production conditions in advance,and provide theoretical reference for the optimization of the screen pipe structure to avoid erosion.
sand controlerosionscreen pipeerosion rateerosion model
万方数据
维普
