Conventional connector for casing string can't meet the demand of seal and connection in solid expandable tubular and presented a new thread structure for an expandable casing connector.
传统的套管接头不能满足连接与密封要求，并设计出了一种新型的膨胀连接螺纹结构。
Expandable tubular technology is a process of deforming the casing metal permanently by a hydraulic or a mechanic device so as to complete the well construction.
膨胀管技术是在井下以机械或液压的方法使管材永久变形、完成油气井建井的技术。
The feeders may be set in different modes, and are preferably connected to both the metal casing and one tubular conductor through insulator in the metal casing.
馈电器可以有多种设置方式，其中优选是使馈电器通过绝缘体穿过金属外壳且馈电器两端分别与金属外壳和管状导体相连接。
An electric pencil sharpener USES a toy motor as power and is composed of conic casing with tubular ends, multi-edge cutter for wooden part and a small abrasive wheel for lead core.
一种电动卷笔器，玩具电动机经齿轮减速装置与一中部为锥形，两端为空心圆筒的多刀刃卷笔刀筒机械连接。小砂轮套装在玩具电动机轴上。
An electric pencil sharpener USES a toy motor as power and is composed of conic casing with tubular ends, multi-edge cutter for wooden part and a small abrasive wheel for lead core.
一种电动卷笔器，玩具电动机经齿轮减速装置与一中部为锥形，两端为空心圆筒的多刀刃卷笔刀筒机械连接。小砂轮套装在玩具电动机轴上。
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