管柱

开启真空装置使液体通过管柱（质体DNA会与管柱物质结合）。

Switch on the vacuum to draw the solution through the column ( The plasmid DNA binds to the column material ) .

国家体育场清水砼双向斜柱模板体系的研究与应用倾斜和缩进式转向管柱

Research and Application of Formwork for Bidirectional Inclined in National Stadium

在对方球队的门柱之间。环形空间出油气举管柱

Between the opposite team 's goalposts . circular-passage gaslift string

球轴承套管式转向管柱

Tube and ball type steering column

裸眼单封隔器测试管柱

Open hole single packer test string

油套-套管环形空间环形空间出油气举管柱

Tubing-casing annulus circular-passage gaslift string

针对气举井实际工况，首次推导出气举管柱的传热系数计算公式，从而为气举管柱流温计算奠定了基础。

According to the actual working condition of the gas-lift recovery well , the formula for calculating the heat transfer coefficient of gas-lift string is derived for the first time .

从液压状态下管柱宏观受力出发，导出了管柱弯曲的基本微分方程，给出了管柱发生失稳弯曲的条件，阐明了油井管柱分析中的中和点概念；

The differential equation for lateral deflection of a tube is derived based on applied force , the condition for tubing buckling is presented and the concept of a neutral point is stated in analysing tubular buckling .

根据软件分析结果，可以准确的判断出管柱的中和点位置、管柱与管壁的接触状态、管柱的变形情况，为管柱的工程设计和施工决策提供了有力的理论依据。

According to the results from the software analysis , the neutral point position of the string , the contact state between the string and the borehole face and the distortion status can be diagnosed accurately , which provides strong theoretic basis for string designing and operation decision .