返砂

提出采用JT5-2型双室锯齿波跳汰机代替JT3-1型单室跳汰机，以及用来选别双螺旋分级机返砂的螺旋溜槽，取得了理想的指标。

Applied JT5-2 model saw tooth wave duplex jig to replace JT3-1 model single-chamber jig and spiral chutes which handle sand return from the double-spiral classifier , and achieved good index .

磨矿生产率与返砂比的相关分析

Relative Analysis on Grinding Productivity and Sand - returning Ratio

普通底阀无防砂和定压开启功能，对出砂严重的井况常出现层窜、返砂等问题。

Usual foot-valve often present flowing from one stratum to another and returning sands , etc.

返砂牛蒡制作方法

Making Method of Burdock Root System

应用于使用磁性衬板的球磨机与分级机之间，可提高返砂比和磨矿效率。

When it is used between ball mill mated with magnetic liner and classifier , the underflow ratio and grinding efficiency are increased .

侧钻时克服了侧钻点井斜大、裸眼段长、返砂少等困难，选择正确的侧钻方法，充分利用无线随钻侧斜仪进行监测，达到侧钻目的。

When sidetracking , selecting the correct sidetracking method , and making the best of measurement while drilling ( MWD ) to monitor , achieve the objective of sidetracking .

针对目前油田冲砂作业过程中下放冲砂管柱时需停泵作业及冲返的含砂液体直接循环使用所存在的问题，提出了高效环保冲砂作业工艺。

In consideration of the problems of pump off and direct circulation of backflow fluid containing sands in setting sand washing casing string its operation , a technique for high efficient and environmental protection sand-washing operation is proposed .