Motion and force of the solid plug in the solid conveying zone were analyzed deeply in the two equivalent cases of the inner screw.

在固体输送段对内螺杆的两种等效情况下固体塞的运动和受力作了深入分析。

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A technique of temporary screen plugging for fractured reservoirs strata is proposed, by which the solid particles in the mud are used to plug up the fractures.

屏蔽式暂堵技术是利用泥浆中固相颗粒在地层裂缝处形成堵塞而达到暂堵的技术。

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Reliability- The process fluid flows through the trim, flushing away solid deposits above and below the guide bushing , thus reducing the possibility of a sticking valve plug.

可靠性过程流体流动，通过修剪，冲掉上述固体存款和指导下套管，从而减少了一贴阀芯的可能性。

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