测定时向压力室通压缩空气(或氮气),直至小水柱恰好重新回到切面上为止,所加的压力,称为平衡压力(balance pressure),可以从仪器的压力表上读出,加上负号即为该水柱的压力势,又由于木质部的溶质势绝对值很小,因此可用测得的压力势来近似地代表...
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...液流恰好回升到切口处,表明 所加压力刚好抵偿了导管中的原始负压: 即: P = - p P=外加压力,也称平衡压(balance pressure) (3)压力室测定植物水势时应注意的事项: 野外采样或操作时应注意样品失水及样品的完 整性(无伤口); 装样最好在30s内...
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balance pressure drilling 平衡压力钻井
motion balance pressure sensor 动作平衡式压力传感器
balance pressure reducing valve 均衡降低压力阀 ; 平衡减压阀 ; 均衡减压阀 ; 平衡减压
balance pressure drilling method 衡压钻井法
balance pressure torch 等压式焊炬
balance pressure drilling method over 超衡压钻井法
pressure balance 压力秤 ; 压力天平 ; 压力天平国际建议
balance pressure value 平衡压力值
In the process of balance pressure drilling in fractured carbonate formation, fluid loss is possible when the hole penetrates the fracture.
碳酸盐裂缝性地层,在平衡钻进过程中,一旦钻遇裂缝,就可能发生井漏。
Being particularly against leakage function of RTTS packer with hydraulic anchor is applied in shallow or under balance pressure extensively.
RTTS封隔器因水力锚自身特有的防窜功能,在浅井测试及负压测试中具有广泛的应用。
Using under balance pressure drilling technique aims at preventing the mud loss and pollution of Palaeozoic limestone reservoir in this area and therefore protecting oil reservoir.
该井四开钻探过程中成功地采用欠平衡钻井技术钻穿寒武系凤阳山组,以防止该区古生界灰岩储层发生井漏及储层污染,从而保护油层。
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