【摘 要】
：
利用能量法，推导了斜直井眼中钻柱的屈曲临界载荷．在力学模型中，考虑了钻柱自重和井斜的影响，给出了斜直井眼中临界载荷的一般公式，并讨论了两种形式的变形能增量计算方法的差别，所
论文部分内容阅读
利用能量法，推导了斜直井眼中钻柱的屈曲临界载荷．在力学模型中，考虑了钻柱自重和井斜的影响，给出了斜直井眼中临界载荷的一般公式，并讨论了两种形式的变形能增量计算方法的差别，所得结果可供工程计算使用．
Using the energy method, the buckling critical load of the drill string in a straight borehole is deduced. In the mechanics model, considering the influence of the self-weight of the drill string and the deviation of the wellbore, the general formula of the critical load in a straight borehole is given and the difference between the two forms of incremental calculation of deformation energy is discussed. The obtained results are available for engineering calculation use.
其他文献
On October 16th,2008 Shanghai Huayi Group Company(Huayi Group) began the construction of the coal-based chemical project in Wuwei Economic and Develop-ment Zon
Mavilor公司从1898年起一直生产发动机曲轴,它是法国C.G.I.P.大公司的分公司,现有1200多人。198O年共生产各种曲轴约170000根,其销售额将近23000万法国法郎。其产品不仅销售
Specialty chemicals group LANXESS AGannounces LANXESS Business Unit Basic Chemicals is one of the main growth driversfor LANXESS in China-especially in Q22008,
【正】 On October 10th,2008 Continental,one ofthe top five global leading automotive suppliers,celebrated the land opening ceremony for its new tire plant in He
【正】 During October 27th-31 st,2008 the Leibo county governmentsinged three phosphorous chemi-cal contracts totally valued at RMB3.46 billion respectivelywith
On November 14th,2008 WACKER Chemie AG and Dow Corning Corporationofficially started production in the firststage of their new pyrogenic silica and si-loxane p
在发动机燃烧过程的研究中,波尔舍公司研究了四气门的燃烧室。有两个进气门和两个排气门的汽油机,是人们早已熟知的结构型式,这似乎只是为
In a study of the engine combu
Narr和Lerche（1984）提出的地下天然裂缝间距指数估测方法存在一定局限性，不能估测较大的裂缝间距指数；且由于它未考虑岩心中观察到的裂缝数对裂缝间距指数的影响，亦未考虑岩层厚度
目的:探讨原发性高血压并发心肌梗死患者抗血管紧张素Ⅱ1型受体自身抗体(angiotensinⅡtype 1 receptor-activating antibody,AT1-AA)改变与AT1-AA对鼠冠脉血管的影响。方法:
蠢,本指虫子蠕动;蠢蠢,形容虫子爬动的样子。“蠢蠢欲动”本指像虫豸一样蠕蠕爬动,后常用来比喻敌人准备进犯或坏人阴谋捣乱。如“据点里的敌人又蠢蠢欲动”(峻青《爆炸远征