双卡瓦可回收式套管封隔器
double grip retrievable casing packer
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
单卡瓦可收回式套管封隔器
single grip retrievable casing packer
井壁及尾管封隔器
bottom wall and anchor packer
双卡瓦的打捞矛
bull dog double-slip spear
膨胀式油管封隔器
expanding type tubing packer