Swivel -tube Core Barrel

单动双层岩芯管钻具结构简单、操作方便、同轴度好，使用寿命长，能有效地提高岩、矿芯采取率， 保证岩、矿芯的完整度。

The swivel-tube barrel can effectively increase core recovery fatio. It is suitable for drilling in  formations which have oblique holes. It is effective to assure hole quality.

双管钻具：国际标准：T2-76、T2-86、T2-101、T6-101、T6-131

双管钻具：国内标准： P56、P59、P75、P91、PA-110、PA-130、PA-150

Double tube core barrel:International Standard:T2-76、T2-86、T2-101、T6-101、T6-131

Double tube core barrel:National Standard:P56、P59、P75、P91、PA-110、PA-130、PA-150