It is composed of casing flange, casing cross joint, wellhead valves, tubing hanger, tubing head cross joint and accessories.
这种井口装置由套管法兰、套管大四通、井口阀、油管挂、油管挂体及相关附件组成。
The hydraulic section consists of the inlet and outlet nozzles, casing, flange, impeller, diffuser, pump shaft, pump bearing, thermal barrier and thermal barrier heat exchanger.
水力部件由以下组成：出入口管，壳体，法兰，叶轮，导叶，泵轴，泵轴承，热屏和热屏热交换器。
Time for the third kind of closing well is so long that flange steel ring groove on the top of casing-head is heavily corroded in M4 well being situated in Tarim basin.
位于塔里木盆地的M4井，由于三类封井时间较长，造成套管头上部法兰钢圈槽严重腐蚀。
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