Deep inside your skin are many tiny , coiled tubes that open onto the surface of your skin . these tubes are called sweat glands 在你皮肤的深层有很多微小的、盘绕着的管状物,它们的开口在皮肤表面上,这些管状物叫“汗腺” 。
The coiled tubing fault tree is constructed based on field investigation and relevant literature by use of the fault tree analysis theory 结合现场调研和有关文献资料,根据故障树分析理论,用演绎法建立了连续油管的故障树。
To solve the problem of the maximum running depth of coiled tubing , the maximum tensile condition , frictional condition and buckling condition should be satisfied 在油田使用连续油管柱作业中,求解连续油管的最大下入深度问题时,必须满足最大抗拉强度条件、摩擦阻力条件和屈曲变形条件及其确定的方法和原则。
Abstract : to solve the problem of the maximum running depth of coiled tubing , the maximum tensile condition , frictional condition and buckling condition should be satisfied 文摘:在油田使用连续油管柱作业中,求解连续油管的最大下入深度问题时,必须满足最大抗拉强度条件、摩擦阻力条件和屈曲变形条件及其确定的方法和原则。
In this article , a new theoretical model on diametral growth ( or ballooning ) of coiled tubing ( ct ) under the action of an internal pressure is derived based on fatigue cyclic softening and elasticity and deformation plasticity theories 根据疲劳循环屈服强度衰减模型和弹塑性变形理论,推导了连续油管在内压作用下的直径增长(鼓胀)的理论模型。
Abstract : in this article , a new theoretical model on diametral growth ( or ballooning ) of coiled tubing ( ct ) under the action of an internal pressure is derived based on fatigue cyclic softening and elasticity and deformation plasticity theories 文摘:根据疲劳循环屈服强度衰减模型和弹塑性变形理论,推导了连续油管在内压作用下的直径增长(鼓胀)的理论模型。
Experimental study of miniature coiled tube evaporator will provide some reference for improving performance of evaporator and constituting suitable design criteria . so , the result has a certain value for theory study and some other field 微型螺旋管蒸发器的实验研究,能够为改进蒸发器的性能以及制定合适的设计标准提供参考,其研究结果具有一定的理论研究和工程实用价值。
Abstract : the development course , advantages & amp , shortcomings of coiled tubing drilling ( ctd ) techniques are presented , as well as surface equipments and downhole tools for ctd . the applications and new progress of ctd from abroad are introduced 文摘:叙述了连续油管钻井技术的发展历程、优缺点、连续油管钻井所需的地面设备和井下工具,并介绍了连续油管钻井在国外的应用情况和最新进展。
First , the design work was done according to the working conditions , and related correlative formulae were taken . in view of the manufacture , size , weight and other related confined conditions , miniature coiled tube evaporator was developed 首先根据既定工况,通过经验公式对微型蒸发器进行设计计算,考虑加工条件、材质、体积、重量等相关条件的制约,最后设计制造了微型螺旋管蒸发器。
This article offers a method for solving the frictional drag , that is , according to the various buckled shapes of coiled tubing in different hole sections , working out the mean contact counterforce in a screw pitch in solving the radial contact counterforce 求解摩阻力时,可针对连续油管在井身中不同结构段的不同变形形状,采用求解径向接触反力时求一个螺距内平均接触反力的方法加以解决。