新疆玛湖地区致密油水平井套管螺纹扣型优选

The Optimization of Casing Thread Types for Horizontal Tight Oil Wells in Mahu Oilfield, Xinjiang

舒博钊 赵文龙 王航 黄永智 张智 祝效华

SHU Bozhao ZHAO Wenlong WANG Hang HUANG Yongzhi ZHANG Zhi ZHU Xiaohua

中国石油新疆油田分公司工程技术研究院，新疆克拉玛依 834000 中国石油集团石油管工程技术研究院，陕西西安 710077 天津钢管制造有限公司，天津 300301 西南石油大学机电工程学院，四川成都 610500

Engineering Technology Research Institute, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000, China CNPC Tubular Goods Research Institute, Xi’an, Shaanxi, 710077, China Tianjin Pipe Corporation, Tianjin, 300301, China School of Mechanical Engineering, Southwest Petroleum University, Chengdu, Sichuan, 610500, China

为了解决新疆玛湖地区致密油水平井下套管作业过程中的套管螺纹接头断裂失效问题，采用有限元数值模拟方法和全尺寸套管实物试验方法，对比分析了下套管作业上提–下放过程中API-LC长圆扣型和TP-G2特殊扣型套管螺纹接头的连接强度和疲劳寿命。数值模拟和试验结果表明，在相同上提拉力或下放压力作用下，TP-G2特殊扣型套管螺纹接头的应力水平明显低于API-LC长圆扣型套管螺纹接头；在相同拉伸–压缩循环交变载荷作用下，TP-G2特殊扣型套管螺纹接头的疲劳寿命约为API-LC长圆扣型套管螺纹接头的6.9倍。研究表明，新疆玛湖地区致密油水平井下套管作业时采用TP-G2特殊扣型套管螺纹接头代替API-LC长圆扣型套管螺纹接头，能够更好地满足现场下套管作业技术需求，提高作业效率。

To tackle the fracture failure of casing thread joints when running casing in horizontal tight oil wells in Mahu Oilfield, Xinjiang, numerical simulations of casing thread joints and full-scale experiments on casing were conducted to compare and analyze the connection strength and fatigue life of API-LC long round thread joints and TP-G2 special thread joints during the lifting and lowering process of casing running. The results of simulations and experiments showed that the stress of TP-G2 special thread joints was significantly lower than that of the API-LC long round ones under the same tension or compression forces, and further, the fatigue life of TP-G2 special thread joints was about 6.9 times of that of API-LC long round thread joints under the same cyclic and alternating tensile-compressive load. According to our research, TP-G2 special thread joints can play a better role than API-LC long round thread joints in meeting the technical demands for casing operation in horizontal tight oil wells in Mahu Oilfield, Xinjiang and in improving operation efficiency.

中国石油新疆油田分公司科研计划项目“玛湖地区水平井套管选用优化及技术规范”（编号：管材-2019-QT-37）资助

https://doi.org/10.11911/syztjs.2021041