有线电视广播系统技术规范 | 深圳市威尔达科技有限... ... 复合三次差拍 composite triple beat(CTB) 载波复合三次差拍比 carrier to composite triple beat ratio(C/CTB) 载噪比 carrier to noise ratio ...
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When the control system opens the well for production, the plunger and a column of fluid are carried up the tubing string.
当控制系统开井生产时，柱塞和液柱沿油管柱向上被携带。
The correct volume ensures that the column of fluid in the tubing string is balanced by the column of fluid in the annulus.
正确的用量确保了在油管柱中的液柱被环形空间中的液柱所平衡。
When underbalanced drilling or drilling easy leaky zone by using aeration fluid, the determination of fluid density and downhole fluid column pressure is very important.
利用气体型流体进行欠平衡钻井，或钻易漏地层时，流体密度及井下液柱压力的确定十分重要。
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