钻探工程2025，Vol.52Issue(2)：117-124,8.DOI:10.12143/j.ztgc.2025.02.016
海域水平井钻井连续循环短节结构设计与分析
Design and analysis of continuous circulation valve for horizontal drilling in marine areas
摘要
Abstract
The continuous circulation valve can maintain the circulation of drilling fluid when drilling is stopped,which can effectively solve the sediment at the bottom of the hole and the fluctuation of pressure at the bottom of the hole,especially for offshore oil and gas horizontal drilling.In this paper,a continuous circulation valve is designed,the structure and working principle of the continuous circulation valve are introduced,the force analysis and structural optimization design are conducted on the strength of the body under extreme working conditions,and the side opening of the bypass valve with a safety factor greater than 1.2 times was selected;A finite element stress analysis is conducted on the bypass valve,which comprehensively analyzes the stress distribution and sealing pressure.The influence of changes in the half cone angle of the sealing pair and the thickness of the valve on the stress and sealing effect of the bypass valve is obtained.The half cone angle of the sealing pair,α=30°,and the thickness of the valve core plate,δ=8mm,are optimized.and the bypass valve sealing test and body strength test are conducted,proving that the strength and sealing performance of the continuous circulation valve meet the actual usage requirements under the ultimate internal pressure of 35MPa and ultimate tensile force of 3503kN.关键词
连续循环钻井/连续循环短节/旁通阀/密封/受力分析/水平井钻井Key words
continuous circulation drilling/continuous circulation valve/bypass valves/seal/force analysis/horizontal drilling分类
能源科技引用本文复制引用
崔淑英,陈晓君,陈根龙,田英英,赵明,张欣,韩泽龙..海域水平井钻井连续循环短节结构设计与分析[J].钻探工程,2025,52(2):117-124,8.基金项目
中国地质调查局地质调查项目"深海钻探工程关键技术支撑"(编号:DD20221721) （编号:DD20221721）
