gas well bottom pressure 气井井底压力
calculating well bottom pressure 折算井底压力
lower the well bottom pressure 降低井底压力
well bottom flow pressure 井底流动压力
The technologies could ensure the well bottom pressure keeping balanced during waiting on cement and cementing safety.
该技术能保证固井候凝过程中井底压力平衡，施工安全。
The rule of reservoir pressure distribution and bottom hole flowing pressure alteration of a periodic trial-produce well in infinity subterranean formation.
无限大地层中—口间歇试采生产井的地层压力分布及井底流压变化规律；
In order to provide scientific basis for mining coal-bed methane, it is necessary to analyze the pressure on well bottom.
为了给煤层气勘探和开发提供理论依据，必须对煤层气井井底瞬时压力进行分析。
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