钻探工程2024，Vol.51Issue(6)：32-38,7.DOI:10.12143/j.ztgc.2024.06.004
保压取心钻具球阀工作动力学分析
Analysis of working dynamics of ball valve with pressure core sampler
摘要
Abstract
The pressure holding coring technology can keep the extracted core under in-situ condition,minimize the loss of important data in the core,and then accurately obtain important formation parameters which can calculate the reserves of mineral resources.In this paper,the ball valve mechanism of pressure core sampler is studied by numerical simulation,and its dynamic characteristics are explored to optimize the ball valve mechanism,and increase its sealing reliability.The results show that with the increasing of thrust force on the ball valve,the shorter the closing time of ball valve,but the vibration generated increases,which is easy to cause seal failure.Thus,the small thrust force is selected to help improve the sealing reliability.With the decreasing of friction coefficient,However,the vibration generated increases,making the leakage risk of ball valve much bigger.When the ball valve is closed,the pressure simulation of 30MPa is conducted.The maximum contact stress and the maximum strain are both within the allowable range of ball valve.This study are meaningful to guide the optimal design of ball valve mechanism and improve its working reliability.关键词
保压取心钻具/球阀/推力/摩擦系数/振动/可靠性Key words
pressure coring/ball valve/thrust force/friction coefficient/vibration/reliability分类
地质学引用本文复制引用
韩泽龙,李小洋,赵明,宋刚,张欣,蒋亚峰,田英英..保压取心钻具球阀工作动力学分析[J].钻探工程,2024,51(6):32-38,7.基金项目
国家自然科学基金项目"海洋天然气水合物保压取样球阀密封失效机理及优化设计研究"(编号:42102352) （编号:42102352）
国家重点研发计划项目"天然气水合物勘查开发技术联合研究"(编号:2018YFE0208200) （编号:2018YFE0208200）
