全金属可溶桥塞卡瓦结构锚定性能优化  

Optimization of Anchoring Performance of Slip Structure of All-metal Dissolvable Bridge Plug

作　　者：崔璐[1] 常文权 王澎 邹方 赵景辉 王航[1] 程嘉瑞[1] CUI Lu;CHANG Wenquan;WANG Peng;ZOU Fang;ZHAO Jinghui;WANG Hang;CHENG Jiarui(Xi′an Key Laboratory of Wellbore Integrity Evaluation,Xi′an Shiyou University,Xi′an Shaanxi 710065,China;HYCET Engine System(Jiangsu)Co.,Ltd.,Yangzhong Jiangsu 212214,China)

机构地区：[1]西安石油大学,西安市油气井完整性评价重点实验室,陕西西安710065 [2]蜂巢动力系统(江苏)有限公司,江苏扬中212214

出　　处：《润滑与密封》2025年第3期118-127,共10页Lubrication Engineering

基　　金：陕西省自然科学基金项目(2023-JC-YB-376);陕西省教育厅项目(2023JP127);西安石油大学研究生创新与实践能力培养计划项目(YCS22214261)。

摘　　要：全金属可溶桥塞由于具有良好的可控自溶解性,逐渐被用于储层压裂改造作业中。桥塞卡瓦结构锚定过程中,卡瓦牙与套管的不均匀咬合所引起的桥塞承载能力不足,是影响压裂效率的关键。为提升桥塞卡瓦结构的锚定性能,以影响套管咬合深度和接触应力的4个主要参数齿槽轴心角、齿槽深度、齿端距和齿槽倾角为对象,分析不同参数下前后排卡瓦牙对套管的咬合深度及接触应力的变化趋势。结果表明:随着齿槽轴心角增大,套管咬合深度差值先减小后增大,套管接触应力差值逐渐减小,齿槽轴心角为28°时咬合较为均匀;随着齿槽深度的增大,套管咬合深度差值逐渐增大,套管接触应力差值出现上下波动,齿槽深度为6.7 mm时咬合较为均匀;随着齿端距的增大,套管咬合深度差值不断增加,套管接触应力差值先逐渐增大最后保持稳定,齿端距为13 mm时咬合较为均匀;随着齿槽倾角的增加,套管咬合深度差值和套管接触应力差值逐渐增大,齿槽倾角为65°或67°时咬合较为均匀。以齿槽轴心角、齿槽深度、齿端距和齿槽倾角的变化作为输入层,以套管接触应力和咬合深度作为输出层,应用多目标优化方法确定出卡瓦基座最优结构参数为:齿槽轴心角为27.9°,齿槽深度为6.7 mm,齿端距为13 mm,齿槽倾角66°。在最优参数下套管的接触应力和咬合深度在轴向更加均匀。Due to its good controllable solubility,the all-metal dissolvable bridge plug is gradually being used in reservoir fracturing improvement operations.During the anchor plugging process,the uneven occlusion of the slip teeth and the casing causes insufficient load-bearing capacity,which is the key factor affecting the efficiency of fracturing.Four main parameters affecting the occlusion depth and contact pressure of the casing were studied to improve the anchoring performance of all-metal dissolvable bridge plug,including the included angle of the cogging axis,the depth of the tooth space,the frond-end distance of the tooth space,and the inclination of the cogging axis.The change trend of the occlusal depth between the front and back rows of the slip teeth on the casing and the contact pressure of the casing under different parameters was analyzed.According to the results,as the included angle of the cogging axis increases,the difference in contact pressure of the casing decreases,and the occlusal depth of the casing first decreases and then increases.The occlusal depth is more homogeneous when the included angle of the cogging axis is 28°.As the depth of the tooth space increases,the difference in the occlusal depth of the casing gradually increases,and the difference in contact pressure of the casing fluctuates up and down.The occlusal depth is more homogeneous when the depth of the tooth space is 6.7 mm.As the frond-end distance of the tooth space increases,the difference in the occlusal depth of the casing continues to increase,and the difference in contact pressure of the casing first gradually increases and finally stabilizes.The occlusal depth becomes more homogeneous when the frond-end distance of the tooth space is 13 mm.As the inclination angle of the tooth spacing increases,the differences in the occlusal depth and contact pressure of the casing increases gradually.The occlusal depth becomes more homogeneous when the inclination of the cogging axis is 65°or 67°.Taking the changes of the included angle

关 键 词：全金属可溶桥塞 卡瓦结构 锚定性能 多目标优化 井下压裂工具 

分 类 号：TH136[机械工程—机械制造及自动化] TE931[石油与天然气工程—石油机械设备]