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Steel and Composite Structures Volume 44, Number 2, July 2022 , pages 271-267 DOI: https://doi.org/10.12989/scs.2022.44.2.271 |
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Field trial of expandable profile liners in a deep sidetrack well section and optimizable schemes approach for future challenges |
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Le Zhao, Yulin Tu, Heping Xie, Mingzhong Gao and Fei Liu
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| Abstract | ||
| This study discusses challenges of running expandable profile liners (EPLs) to isolate trouble zones in directional section of a deep well, and summary the expandable profile liner technology (EPLT) field trial experience. Technically, the trial result reveals that it is feasible to apply the EPLT solving lost-circulation control problem and wellbore instability in the deep directional section. Propose schemes for optimizing the EPLT operation procedure to break through the existing bottleneck of EPLT in the deep directional section. Better-performing transition joints are developed to improve EPL string reliability in high borehole curvature section. High-performing and reliable expanders reduce the number of trips, offer excellent mechanical shaping efficiency, simplify the EPLT operation procedure. Application of the expansion and repair integrated tool could minimize the risk of insufficient expansion and increase the operational length of the EPL string. The new welding process and integrated automatic welding equipment improve the welding quality and EPL string structural integrity. These optimization schemes and recent new advancements in EPLT can bring significant economic benefits and promote the application of EPLT to meet future challenges. | ||
| Key Words | ||
| expandable profile liner technology; isolating drilling trouble zones; mechanical shaping tools; optimizable schemes; welding process and equipment | ||
| Address | ||
| Le Zhao:Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, 518060, China Yulin Tu:SINOPEC Tech Middle East LLC, Dhahran, Saudi Arabia Heping Xie:Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, 518060, China Mingzhong Gao:Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, 518060, China Fei Liu:College of Emergency Management, Nanjing Tech University, Nanjing, 211816, China | ||