用于在井下条件下控制流体流动的井下装置。
A downhole device used to control fluid flow under downhole conditions.
能够经油管柱和相关的环形空间实现循环的井下装置。
A downhole device that enables circulation through the tubing string and associated annulus.
本文以某型号井下装载机工作装置为例，对其连杆机构的结构参数进行优化设计。
The design of the arm system includes structural parameters design of linkage and structural design of all components.
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