In this paper the spiral velocity of eccentric annulus with inner pipe turned is analysed and computed.

本文分析计算了石油钻井工程偏心环空中内管转动的螺旋流动。

youdao

The preparation method comprises preparation of the inner pipe and connection of the inner pipe and the outer pipe.

本发明所述的制备方法包括内管的制备和内、外管连接。

youdao

To monitor the inner pipe leakage situation of the pipe jacket vessel in the process of pressurizing, find out the fountainhead in time.

为了监测管式夹套容器在加压过程中的内管泄漏情况，及时发现泄漏源。

youdao