Influence of the mechanical properties of materials on the ultimate pressure-bearing capability of a pressure-preserving controller  

作　　者：Xiao-Jun Shi He-Ping Xie Cong Li Gui-Kang Liu Zi-Jie Wei Tian-Yu Wang Ju Li Qiu-Yue Li 

机构地区：[1]State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,College of Water Resource and Hydropower,Sichuan University,Chengdu,610065,Sichuan,China [2]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,Guangdong,China [3]College of Mechanical Engineering,Sichuan University,Chengdu,610065,Sichuan,China [4]Jinshi Drilltech Co.Ltd.,Tangshan,063004,Hebei,China

出　　处：《Petroleum Science》2024年第5期3558-3574,共17页石油科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Grant Nos. 52225403, 52304146, 51827901);Sichuan Science and Technology Program (2023NSFSC0919)。

摘　　要：The pressure-preserving controller is the core part of deep in-situ pressure-preserving coring(IPP-Coring) system, and its pressure-preserving capability is the key to IPP-Coring technology. To achieve a good understanding of the influence of mechanical properties of materials on the ultimate pressure-bearing capability(UPB-Capability) of the pressure-preserving controller, the IPP-Coring experimental platform was developed to test the UPB-Capability of pressure-preserving controllers of four different materials. The experimental results show that the UPB-Capability of pressure-preserving controllers with different material varies greatly. A numerical model of the pressure-preserving controller was developed to study the influences of mechanical parameters of materials on the UPB-Capability of the pressurepreserving controller after the accuracy of the numerical model is verified by experiments. The results indicate that the yield strength(YS) and Poisson's ratio(PR) of the material have little effect on the UPB-Capability of the pressure-preserving controller, whereas the elastic modulus(EM) of the material has a significant effect. A generalized model of the UPB-Capability of the pressure-preserving controller is developed to reveal the mechanism of the influence of material properties on the UPB-Capability of the pressure-preserving controllers. Considering these results, the future optimization direction of the pressure-preserving controller and material selection scheme in practical engineering applications of the pressure-preserving controller are suggested.

关 键 词：In-situ pressure-preserving coring Pressure-preserving controller Material properties Ultimate pressure-bearing capability 

分 类 号：TE937[石油与天然气工程—石油机械设备] TB301[一般工业技术—材料科学与工程]