高压单管封隔器的设计
The Design of Single Tube High-pressure Packer
水力式单管封隔器
hydrostatic single-string packer
裸眼跨式双封隔器测试管柱
open hole straddle packer test string
双管双管板换热器
double tube double tube-plate heat exchanger
双卡瓦可回收式套管封隔器
double grip retrievable casing packer
单卡瓦可收回式套管封隔器
single grip retrievable casing packer