HLM型滑塊卡瓦打撈矛    

Sliding Block Spears  Type HML

滑塊卡瓦打撈矛是內撈工具。它可以打撈鉆桿、油管、套銑管、襯管、封隔器、配水器等具有內孔的落物，又可以對遇卡的落物進行倒扣作業或配合其他工具使用。它分為單滑塊打撈矛和雙滑塊打撈矛。

The sliding block spear is an internal fishing tool which can be used both to fish drill pipes, tubings,  washover pipes, liners, packers, water allocators and reverse stuck fishes or used with others tools. The block spears are furnished in two types. Releasing single block spear and releasing two blocks spear.