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oil well case
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  相似匹配句对
     Multifunctional oil well logging
     多功能测井仪电路设计
短句来源
     They are well oil-soluble.
     油溶性好。
短句来源
     Oil
     陕北石油秩序
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     Oil
     石油
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     On case teaching
     也谈案例教学
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It is quite complicated and hard work to calculate potential distribution in regional cathodic protection with BEM.In this paper,the special cylindrical element method is discussed in calculating oil well case potential distribution to shorten computer operation time.This method can be used in the cathodic protection design of the oil well case.

用边界元法求解区域性阴极保护的电位分布时步骤复杂,工作量很大.采用特殊的柱面单元及算法计算油井套管表面的电位分布,节约了机时,缩短了计算周期.这一方法可以用于油井套管阴极保护系统的设计.

Studied the temperature filed distribution in oil well using electric cable and/or electrothermal rod. Used the simple and effective thermal resistance and heat content formula to replace the conventional mathematics model established by the use of the finite difference method- During simulation study, comprehensively considered the heat transfer mode such as heat conduction, convection, heat radiation and so on, treated the heat physical property parameter such as heat transfer factor, liquid density, specific...

Studied the temperature filed distribution in oil well using electric cable and/or electrothermal rod. Used the simple and effective thermal resistance and heat content formula to replace the conventional mathematics model established by the use of the finite difference method- During simulation study, comprehensively considered the heat transfer mode such as heat conduction, convection, heat radiation and so on, treated the heat physical property parameter such as heat transfer factor, liquid density, specific heat and so on asa variable based on the on-site condition- Combined it with 1 oil well case, simulated the temperature distribution in the well, determined the location of the wax solidifying point,optimized the power and setting depth of the automatic control electric cable. The simulated result fitted well with that measured on site.

研究了电缆及电热杆油井温度场分布。提出利用简便、易行的热阻热容算式取代传统使用的有限差分法来离散建立的数学模型。模拟研究中,综合考虑了热传导、对流换热、热辐射等传热方式,并根据现场实际情况将导热系数、液体密度、比热等热物性参数当作变量处理。结合油田矿场1口油井实例,模拟出了油井的温度分布,确定了蜡凝固点的位置,优选出了自控电缆的功率大小及下入深度。模拟结果和现场实测结果比较吻合。

in former works, the variable error polyhedron method was used to optimizethe model,since the fitting of the cathodic polarization curve is simplistic,the stability ofthe optimization procedure is not up to expectations. In this paper, the piecewise linearfitting is used to optimize the model, thus the stability of the optimlzation procedure isimproved. This calculation method has been used in the cathodic protection design ofsome oil well case pipes.

用边界元法(BEM)求解区域性阴极保护的数学模型并用可变误差多面体对系统寻优时,以往的研究对阴极极化曲线的拟合过于简单,寻优的平越性很差.本文对用极极化曲线进行分段线性拟合,便寻优过程更加平稳.经改进后的程序BEMU已成功地用于油井套管外加电流阴极保护系统的工程设计.

 
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