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free pipe
相关语句
  自由套管
     prevention of free pipe additional loads.
     自由套管附加载荷的预防。
短句来源
     As microannulus exists between casing and cement (i.e. the frist interface), the experimental waveforms show that the casing wave has obvious increase in frequency and decrease in amplitude compared with the waveforms of free pipe situation.
     实验结果表明,当一界面存在流体环隙时,相对自由套管情形,套管波在幅度减弱的同时,频率显著增大;
短句来源
     The effects of casing diameter on acoustic log in cased-borehole at free pipe situation are investigated with finite element method(FEM).
     用有限元方法研究了自由套管井中不同直径的套管对声波测井的影响。
短句来源
  “free pipe”译为未确定词的双语例句
     calculation of free pipe segment additional loads;
     自由套管段附加载荷计算;
短句来源
     In the planning and design of gravity water transfer system, the combined pattern of pressure free pipe and canal with pressured pipe line is sometimes adopted to carry out water transfer.
     在重力输水系统的规划设计中,有时采用无压管渠与压力管道相结合的方式输水。
短句来源
     Aiming at the features of this water transfer system, a linear programming model is established with the smallest investment into the pipe and canal in gravity water transfer system as the objective function and with the length of pressure free pipe and canal and the length of pipes to be selected in the pressured pipe line as the optimal variables in this paper.
     针对这种输水系统的特点,本文以整个重力输水管渠系统投资最小为目标函数,以无压管渠长度和压力管道中备选管道长度作为优化变量,建立了重力输水管渠系统优化设计的线性规划模型。
短句来源
  相似匹配句对
     prevention of free pipe additional loads.
     自由套管附加载荷的预防。
短句来源
     calculation of free pipe segment additional loads;
     自由套管段附加载荷计算;
短句来源
     On f-free Subsets
     关于f-free子集
短句来源
     Free design
     自由的设计
短句来源
     Pipe conveyor
     管状带式运输机及其在设计中的选用
短句来源
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  free pipe
Properties of Pearlite-Free Pipe Steel of Type 0.03C-1.5Mn-0.09Nb in Strength Class X65-X70
      
Some protection from wind chill at the melt surface should be provided by using a tent enclosure and covering of the free pipe ends.
      
Regularly ensuring a defect-free pipe increases the likelihood that the System will operate leak-free.
      


An experimental study has been carried out for the evaluation of cement bond quality using short spacing acoustic full waveform log in cased hole. Physical models are reduced by a factor of 10 from real well and the reduced transducers are built according to the principle of similarity. As microannulus exists between casing and cement (i.e. the frist interface), the experimental waveforms show that the casing wave has obvious increase in ...

An experimental study has been carried out for the evaluation of cement bond quality using short spacing acoustic full waveform log in cased hole. Physical models are reduced by a factor of 10 from real well and the reduced transducers are built according to the principle of similarity. As microannulus exists between casing and cement (i.e. the frist interface), the experimental waveforms show that the casing wave has obvious increase in frequency and decrease in amplitude compared with the waveforms of free pipe situation. The guided waves have a durative oscillation when cracks exist at the first and second (i.e. between cement and formation) interfaces or when cement deficiency exists between casing and formation. The annulus cement deficiency rate has a close relation with the amplitude of casing wave which is a third power function. The result of the study shows that it is a proper way to evaluate cement deficiency rate by casing wave amplitude at a certain well size and casing size, that not only the amplitude of the casing wave, but also the full casing wavetrain should be used for the evaluation of the first interface, and that the amplitude of the subsequent guided waves which have not been used before is a good indicator of the quality of cement bond.

胡文祥,史学兰,等.套管井短源距全波测井实验研究.测井技术,1997,21(5):329~334针对短源距固井质量评价方法开展了实验模拟研究。物理模型按10∶1缩小,并制作了相应的缩小换能器。实验结果表明,当一界面存在流体环隙时,相对自由套管情形,套管波在幅度减弱的同时,频率显著增大;一、二界面水泥胶结的缺陷或环空水泥的缺失均导致后续导波的持续振荡;而环空水泥的缺失量的大小与套管波幅度最为密切,二者为三次函数关系,研究结果认为,在一定的井眼和套管尺寸条件下,用套管波幅度评价环空水泥缺失量是恰当的;一界面的评价仅用套管波幅度或衰减是不准确的,最好利用整个套管波列;而以前所未利用的后续导波的幅度对于环空水泥胶结缺陷有明显的指示作用,是一种值得利用的信息。

In the planning and design of gravity water transfer system, the combined pattern of pressure free pipe and canal with pressured pipe line is sometimes adopted to carry out water transfer. Aiming at the features of this water transfer system, a linear programming model is established with the smallest investment into the pipe and canal in gravity water transfer system as the objective function and with the length of pressure free pipe and canal and the length of pipes to be selected...

In the planning and design of gravity water transfer system, the combined pattern of pressure free pipe and canal with pressured pipe line is sometimes adopted to carry out water transfer. Aiming at the features of this water transfer system, a linear programming model is established with the smallest investment into the pipe and canal in gravity water transfer system as the objective function and with the length of pressure free pipe and canal and the length of pipes to be selected in the pressured pipe line as the optimal variables in this paper.

在重力输水系统的规划设计中,有时采用无压管渠与压力管道相结合的方式输水。针对这种输水系统的特点,本文以整个重力输水管渠系统投资最小为目标函数,以无压管渠长度和压力管道中备选管道长度作为优化变量,建立了重力输水管渠系统优化设计的线性规划模型。

Assuming the acoustic absorption of media, the spectra of reflected ultrasonic waves in the cased holes drilled in 3 types of formations (limestone, sandstone and shale) with 4 modes of cement bonding (complete bonding, free pipe, bad bonding of casing with cement and of cement to the formation) and with fluid micro annulus are calculated, respectively The results show that the spectra are controlled by the casing's thickness vibration, and affected only by the formation and the cement bonding...

Assuming the acoustic absorption of media, the spectra of reflected ultrasonic waves in the cased holes drilled in 3 types of formations (limestone, sandstone and shale) with 4 modes of cement bonding (complete bonding, free pipe, bad bonding of casing with cement and of cement to the formation) and with fluid micro annulus are calculated, respectively The results show that the spectra are controlled by the casing's thickness vibration, and affected only by the formation and the cement bonding in a frequency band including the frequency of the casing's vibration through its thickness The spectra are affected by the formation characteristics only in the case of good cement bonding, and varied with the mode of cement bonding And the fluid micro annulus does not affect the shape of spectra, but its existence is equivalent to lowering the acoustic impedance of the cement

在考虑介质对超声波吸收的前提下,对3种典型地层(灰岩、砂岩和泥岩)套管井中超声反射波频谱在4种水泥胶结(完全胶结、自由套管、套管与水泥层胶结差及水泥层与地层胶结差)和微环存在的情况下进行了数值计算。结果表明:反射波频谱主要受套管的厚度振动控制,并仅在包含套管厚度振动频率的一个频段内,受地层特性和水泥胶结类型的影响;只有在水泥胶结良好时,地层特性才对反射谱构成有意义的影响;水泥胶结类型不同,反射谱的特征亦不同;微环的存在相当于水泥环声阻抗变小,基本不影响反射谱的形态

 
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