井口除砂器抗冲蚀性能评价分析

Evaluation and Analysis of Erosion Resistance in Wellhead Desanders

含砂天然气对井口除砂器部件会造成严重的冲蚀进而降低开采效率,并且留下安全隐患。针对除砂器关键部件冲蚀严重的问题,从冲蚀角度和热处理2个方面研究其关键部件的耐冲蚀材料42CrMo、45钢、2Cr13、20CrMnTi和H13(4Cr5MoSiV1)的抗冲蚀性能。首先搭建冲蚀试验平台进行了冲蚀模拟试验,其次利用扫描电镜观察靶材冲蚀后的微观形貌,探讨冲蚀磨损机理。结果表明:当冲蚀角在30°~90°时,冲蚀率随冲蚀角的增加而减小;并非所有材料经热处理都能提高抗冲蚀性能;调质状态的2Cr13的抗冲蚀性能最优;调质状态的2Cr13、45钢和出厂状态的H13倾斜冲击时磨损形式以切削为主,垂直冲击时磨损形式为磨料冲击使靶材发生塑性变形而脱落为主。本试验为除砂器耐蚀件选材提供了参考。

Ltd.;Chengdu BOE Optoelectronic Technology Co., Ltd.;The sand-bearing natural gas causes severe erosion to the components of wellhead desanders, thereby reducing production efficiency and posing safety hazards. Aiming at the serious erosion problem of key parts in desanders, the study focused on the erosion resistance of erosion resistance materials such as 42CrMo, 45 steel, 2Cr13, 20CrMnTi, and H13(4Cr5MoSiV1) from perspectives of erosion angle and heat treatment effects. Firstly, an erosion test platform was established to conduct erosion simulation tests. Secondly, the micro-morphology of the target materials after erosion was observed using scanning electron microscope(SEM), and the erosion wear mechanisms were discussed. Results showed that for erosion angles between 30° and 90°, the erosion rate decreased as the angle increased. It was also found that not all materials showed improved erosion resistance following heat treatment. The erosion resistance of 2Cr13 in the quenched and tempered state was the best. The wear mode of 2Cr13, 45 steel in quenched and tempered state and H13 steel in factory state during oblique impact was mainly cutting, while the wear mode during vertical impact was abrasive impact, which caused plastic deformation and detachment of the target materials. This experiment provided a reference for selecting corrosion-resistant components in desanders.