查询词典 casing dog

This method is clear in concept, calculated simply , results accurately in calculation, and used on site conveniently, which provides scientific fact for the correct discription of casing string flexural equation ,accurate calculation of casing flexural deform, and reasonable determination of centralizer position.

但这种计算模式都是基于轴向力为零，只考虑了套管自重引起的横向均布荷载对挠曲变形产生的影响，因此，这种方法仅仅适用于计算"中和点"附近套管柱挠曲变形量这种特殊情况。更加普遍的情况是，套管不仅受自重引起的横向分力的影响，还受轴向力的作用。

The fixation of oil-well establishment is an important thing , and the design of casing is also crucial . So how to make it durable and economical is our purpose - optimization of casing size and coadjutor layout .

固井是油井建井过程中的一个重要环节，而套管设计又是其中的一个关键问题，如何让其满足强度要求而又尽可能的经济，即追求套管尺寸和扶正器布局的最优化是我们最追求的目标。

The fixation of oil-well establishment is an important thing, and the design of casing is also crucial. So how to make it durable and economical is our purpose- optimization of casing size and coadjutor layout.This article introduces the optimization of what have mentioned above.

固井是油井建井过程中的一个重要环节，而套管设计又是其中的一个关键问题，如何让其满足强度要求而又尽可能的经济，即追求套管尺寸和扶正器布局的最优化是我们最追求的目标。

According to the elastic-plastic theory, the calculation method of tangential stress , radial stress of expansion casing both in elastic deformation area and in plastic deformation area is deduced and the minimum critical load between expansion core and casing was determined.

根据弹塑性的理论，推导了膨胀套管在弹性变形区和塑性变形区的周向应力和径向应力计算模型，确定了膨胀套管膨胀时在膨胀芯头与套管之间所需的最小接触载荷。

Research results indicate that casing bend not only makes effective cross section decrease but also leads to casing snapping owing to larger local tensile stress.

结果表明：套管弯曲不仅使有效横截面降低而且由于局部拉应力过大造成套管拉断。

Based on theoretical study and test, by using finite element numerical method, the force and deformation of casing with cement sheath under nonuniform load is analyzed, and the effect of two sensentive parameters, the nonuniform load ratio and ellipticity, on the failure of casing is discussed.

在已有的理论研究与试验工作的基础上，采用有限元数值方法，分析计算了受非均匀地应力作用下套管-水泥环结构的受力与变形，讨论了两个敏感参数——非均匀载荷比和套管椭圆度对套管失效的影响问题。

Applying the casing tube of immersion heater made of this alloy to the hot-dip galvanizing industry, the examination of the industry show the casing tubes usually rupture after running about 50 days.

将该材料制成的热镀锌内加热器外套管直接应用于热镀锌的内加热设备上进行工业试验，元件在工作50天左右时出现意外断裂。

The conventional principle of prestress design of casing is huke law.That is the axial thermal stress under the minimal permissible on the basis of taking into account of three directions of thermal stress of the casing string during steam injection synthetically.

传统热采井套管预应力设计的基本原则是根据虎克定律，将施加于套管的预应力与套管升温后的轴向热应力叠加，使其控制在相应温度下套管许用的最小屈服极限以下。

The results show that, with the expansion cone angle remaining unchanged, the sizing length of expansion cone does not have much effect on the residual stress of casing after expansion, but it has much effect on the expansion force required by tube expansion. The expansion cone angle has no effect on the maximum residual stress of casing, but it has remarkable effect on expansion force. When the radial component force of expansion force is greater than the material's tensile strength, the damage to the material will arise.

研究结果表明，在膨胀锥锥角保持不变的情况下，膨胀锥定径长对膨胀后套管的残余应力没有太大影响，但对套管膨胀所需要的膨胀力有较大影响；膨胀锥锥角对套管最大残余应力没有影响，但对膨胀力的影响十分明显，当膨胀力的径向分力大于材料的抗拉强度时，材料将发生破坏。

Generally, this new technique has three steps. First, mill the necked-in casing with the efficient milling cutter head; and then salvage and back-off the buried pipe by a suitable fishing tool based on fish tip status; at last, orderly use a efficient taper pups and taper to extend and dredge the casing refitment section.

该技术首先利用高效高效铣削式套铣头对缩径套管进行套铣，然后根据鱼顶情况选择合适的打捞工具打捞、倒扣出被埋管柱，最后将高效铣锥短节和铣锥对修套井段进行扩铣通径。

It's not quite as simple as that.

并没有那么容易。

It debuted in 1992 in Japan and the United Kingdom, and 1993 in the United States.

它首次亮相于1992年在日本和英国，在美国1993年。