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Contact performance analysis of pressure controller's sealing interface in deep in-situ pressure-preserved coring system

引用

Petroleum Science 2022年第3期19卷 1334-1346页

作者： Jia-Nan Li Jun Wang Yun-Qi Hu Zhen-Xi You Meng Xu Ying-Wei Wang Zu-Jie Zou Qi-Yue Kang School of Mechanical Engineering MOE Key Laboratory of Deep Underground Science and EngineeringCollege of Water Resource and HydropowerSichuan UniversityChengdu610065China Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen518061China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization Pingdingshan Tianan Coal Mining Co.LTD.Pingdingshan467000China Xi'an Research Institute China Coal Technology&Engineering Group CorpXi'an710077China

The sealing performance of contact interfaces plays the most important role in the design and operation of the in-situ pressure-preserved coring *** meet the demand of ultra-high pressure-retained coring for oil and gas exploration in deep reservoirs,a quantitative analysis of the contact mechanical behavior of the pressure controller was *** on the micro-contact theory of rough surfaces,a three-dimensional numerical model of the rough contact interface between the valve cover and the valve seat was constructed,and the micro-contact behavior of the metal contact surfaces was comprehensively *** results show that the actual contact area of the valve interface increases with the increase of surface roughness before the critical contact point,but decreases after *** with the real contact model with double rough surfaces,although the simplified hard-contact model with a single rough surface can reflect the micro-contact behavior of the rough surface to a certain extent,it cannot truly reveal the microchannel morphology between the sealing interfaces under ***,the realistic double-rough-surface model should be recommended to evaluate the sealing performance of coring tools,particularly for high pressure *** material properties of valves have a significant effect on the contact characteristics of rough surfaces,which suggested that the actual contact area decreases with the increase of the elastic modulus of the contact material under the same loading *** knowledge of this work could help to enhance the seal design of pressure controllers for in-situ pressure-preserved coring.

关键词： In-situ pressure-preserved coring metal seal Rough surface Micro contact

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