The inside (including the taper) is usually made of cement or thermoplastic, since this material must be drilled out if the well is to be deepened beyond the casing point.
浮鞋的内部（包括锥型段部分）通常由水泥或热塑性材料组成，如果在套管鞋处井眼还需要继续加深的话这种材料必须被钻掉。
Based on this point, the mechanics and finite element models for casing stress calculation are established.
在考虑这一特点的基础上，建立了套管应力计算的力学及有限元模型。
Optimizing casing retrieving depth and side-tracking point by minimum cost method due to different kinds of abandoned Wells.
根据不同类型报废井，按最低成本法优选取套深度和侧斜点。
Through analyzed the molding process of the the split air-condition wind-casing, introduced in detail the injection mold structure design, mold design thought and mold design point.
通过对分体空调器出风框的工艺分析，详细介绍了出风框的塑料注射模结构设计，以及设计思路与设计要点。
The influencing regular pattern of depths of deflection point, line slope and casing dimension on horizontal force of directional wellhead is analyzed by case calculation.
通过算例，分析了造斜点井深、造斜率以及套管尺寸对井口水平力的影响规律。
The fullbore sliding sleeves cemented in the well casing string enable on-command opening and closing of each entry point in the completion hardware.
固定在套管柱上的全井眼滑套能够按照指令完井设备上的每一个入口点进行开关。
Preheating unit by using Xiapu gas is introduced, the key point that welding casing can be preheated without getting into furnace has been achieved.
介绍了利用霞普气制作的预热装置，实现了压缩机焊接机壳不需进炉就能预热的关键。
The resistance of nitrided J55 casing to sulfide stress cracking (SSC) was studied by C-ring testing and three-point bending testing under different conditions.
用应力环腐蚀试验和三(四)点弯曲试验研究了某J 55(即石油套管)渗氮套管在不同试验条件下的腐蚀行为，并和未渗氮套管的抗腐蚀性进行了比较。
The monotone property of multivariate function proved that the maximum stress strength point exists on the inner surface of casing under the triaxial stress conditions.
通过实例计算，对比分析了用“三向应力圆”理论与其他几种理论计算的抗挤强度值。
Casing is heated by steam in thermal recovery Wells. There are thermal stresses in casing. Casing deforms when stresses exceed yield point.
计算表明，注蒸汽稠油井如果用常规方法固井，在通常的注汽温度下，套管都因热应力而产生屈服变形。
Casing is heated by steam in thermal recovery Wells. There are thermal stresses in casing. Casing deforms when stresses exceed yield point.
计算表明，注蒸汽稠油井如果用常规方法固井，在通常的注汽温度下，套管都因热应力而产生屈服变形。
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