非均匀载荷条件下射孔套管抗挤强度的影响规律研究  

Influence of Perforation on Casing Collapsing Strength Under Non-uniform Load

作　　者：王鹏[1] 闫炎 张楠 邢俊杰 韩礼红 刘永红[3] WANG Peng;YAN Yan;ZHANG Nan;XING Junjie;HAN Lihong;LIU Yonghong(Daqing Oil Field Production Technology Institute,Daqing,Heilongjiang 163453,China;State Key Laboratory of Oil and Gas Equipment,CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China;College of Mechanical and Electrical Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580,China)

机构地区：[1]中国石油大庆油田有限责任公司采油工艺研究院,黑龙江大庆163453 [2]中国石油集团工程材料研究院有限公司,油气钻采输送装备全国重点实验室,陕西西安710077 [3]中国石油大学(华东)机电工程学院,山东青岛266580

出　　处：《石油管材与仪器》2024年第3期19-24,I0004,共7页Petroleum Tubular Goods & Instruments

基　　金：陕西省博士后科学基金资助项目“射孔过程水泥环完整性失效机理与失封范围表征方法”(编号:2023BSHGZZHQYXMZZ50);页岩气评价与开采四川省重点实验室资助项目“页岩油气水平井压裂过程中套损机理与防治措施研究”(编号:YSK2023004);黑龙江省揭榜挂帅科技项目“古龙页岩油增产改造关键技术研究”(编号:2021ZZ10-04)。

摘　　要：油气井套管抗挤毁性能与材料屈服强度关系紧密,聚能射流穿孔过程中孔眼处存在的射孔裂纹将对射孔套管的抗挤强度产生显著影响。首先针对不同型号钢级的套管进行射孔侵彻实验;然后对无孔眼、机加孔眼和射孔孔眼试件进行静力外挤试验,对比射孔裂纹影响下试件抗外挤性能的变化;最后通过有限元仿真分析了射孔裂纹的存在对套管抗挤性能的影响。结果表明:射孔初始裂纹会加剧孔眼处套管的应力集中现象,并使得射孔套管的抗外挤强度显著下降。此外,相较于孔密与相位,孔径对射孔套管抗外挤强度的降低效果最为显著。The collapsing resistance of casing in oil and gas wells is closely associated with the yield strength of materials.The cracks around the perforated holes have a significant effect on the collapse resistance of casing.Firstly,perforation experiments were carried out on casing of different types and steel grades.Then static compression tests were carried out on three types of specimens without perforated holes,with machined holes and with perforated holes to compare the collapsing resistance changes of each specimen under the influence of perforation crack.Finally,the influence of perforation crack on the collapsing resistance performance of casing was analyzed by finite element simulation.The results show that the initial perforation crack can aggravate the stress concentration of the casing at the hole,and make the collapsing strength of the perforated casing decrease significantly.In addition,compared with the hole density and phase,the hole diameter has the most significant effect on reducing the collapsing strength of perforated casing.

关 键 词：射孔 套管 抗挤强度 裂纹 有限元 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]