摘要
钻井作业中,井控管汇受到高速携砂液的冲蚀作用会出现磨损现象,因此研究其常用管材35CrMo钢的冲蚀性能有重要意义。采用喷射型冲蚀试验机进行了室内试验。35CrMo钢在高速携砂液的冲蚀磨损下,以冲蚀磨损量和冲蚀率表征冲蚀磨损程度,对冲蚀过程中的冲蚀磨损程度随冲蚀时间的变化进行了过程划分;对经降噪和求取梯度处理后的磁记忆信号进行分析,将其与35CrMo钢的冲蚀磨损程度进行拟合定量分析。将磁记忆信号特征参量和冲蚀磨损程度2个变量绘制关系曲线及拟合公式,发现磁记忆信号的梯度峰峰值与冲蚀磨损量呈指数相关,磁记忆信号的梯度峰峰值之间的差值与冲蚀率基本呈正线性相关。通过对磁记忆信号的处理,可定量分析出某一情况下35CrMo钢被冲蚀磨损的程度。
In the drilling operation, well control manifold wear could be observed because of erosion by high-speed sand carrying liquid, therefore, it is important to study the erosion performance of 35CrMo steel. The jet e- rosion test equipment has been used for testing the erosion wear of the 35CrMo steel under high-speed sand carrying liquid. The erosion wear degree is characterized by erosion wear loss and erosion wear rate. The erosion wear de-gree of the 35CrMo steel in the erosion process along erosion time has been divided. The magnetic memory signal after noise reduction and gradient processing was analyzed and used to fit the erosion wear degree of 35CrMo steel to conduct quantitative analysis. The relationship curve and the fitting formula of the characteristic parameters of mag-netic memory signal and the degree of erosion wear were attained. The gradient peak- to-peak value of the magnetic memory signal and the erosion wear loss is exponentially related. The difference between the peak- to-peak value of the magnetic memory signal and the erosion rate is basically linearly related. The treatment of the magnetic memory signal could be used to quantitatively analyze the erosion degree of the 35CrMo steel.
出处
《石油机械》
2017年第3期21-25,共5页
China Petroleum Machinery
基金
中海油有限公司综合科研项目"中海油井的完整性技术体系研究"(YXKY-2015-ZY-09)
