N80钢/SiO_2基涂层/油井水泥石的界面特征研究  

Study on the Interface Characteristics of N80 Steels and Silica Matrix Coatings and Well Cement

作　　者：张春梅[1] 郭小阳[1] 程小伟[1] 

机构地区：[1]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《西南石油大学学报（自然科学版）》2013年第1期144-149,共6页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：西南石油大学校级科技基金(校级项目172)

摘　　要：为了提高固井一界面的胶结强度,采用热化学反应法在N80钢制套管钢基体上制备SiO2基陶瓷涂层作为套管和水泥石之间的过渡层。通过X射线衍射结构分析、扫描电子显微镜和体视显微镜形貌观察以及划痕仪涂层结合力测试,研究了N80钢/SiO2基涂层/油井水泥石的界面微观结构特征和结合行为。结果表明,陶瓷涂层内部和陶瓷涂层/水泥石界面分别产生了新相MgAl2O4和Ca54MgAl2Si16O90;陶瓷涂层与钢基体结合力的临界载荷在40 N左右,陶瓷涂层的制备起到了提高套管与水泥石结合强度的作用。In order to improve the bond strength of the first interface cementing, the silica matrix ceramic coatings were prepared on N80 steel substrates as transitional coating between casing steels and well cement by thermochemical reaction method. The characteristics of the interfacial microstructures and bonding behavior were investigated by the structure, morphology and binding forces of the samples with XRD, SEM, Stereomicroscope and Scratch Tester. The results show that the interface of ceranic coating and cement created the new phase MgA1204 and Ca54MgAl2Si16090, respectively. The critical adhesion between the ceranic coating and the steel matrix is 40 N or so, and the preparation of the ceranic coating is helpful to improve the bonding strength on the first interface.

关 键 词：固井一界面 胶结强度 热化学反应法 SiO2基陶瓷涂层 油井水泥石 

分 类 号：TE256[石油与天然气工程—油气井工程]