In the process of balancepressure 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。
2
Being particularly against leakage function of RTTS packer with hydraulic anchor is applied in shallow or under balancepressure 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。
3
Using under balancepressure drilling technique aims at preventing the mud loss and pollution of Palaeozoic limestone reservoir in this area and therefore protecting oil reservoir.