TFLT型提放可退式打捞筒  

Lifting-Lowering and ReleasingOvershots TYPE TFLT

提放可退式打捞筒用于打捞油管及相应管柱。如果被捞管柱卡死，可以通过下击管柱后直接上提的方式，收回工具。

Lifting-lowering andreleasing overshot is used to catch tubings and equivalent size pipe strings incasing . In the event of a pipe string becoming stuck, after down jarring thepipe string and by lifting up, the tool can be lifted out.