WD-J型機械式外割刀  

Mechanical External Cutters Type WD-J

機械式外割刀是一種利用彈簧自動進給在管外進行切割管材的割刀。由于彈簧自動進給，他可避免由于絲鉆操作失誤施加過大拉力而毀壞割刀，割斷后可與落魚同時起出，該割刀可切割5”和4 1/2”鉆桿，在切割不同鉆桿時，需要更換相應得卡緊套。

Mechanical external cutter is a tool cutting pipes on outside wall, which utilizes spring force to feed automatically. Because of adopting spring feed automatically,the cutting elements can be precented from being damaged by alarge pulling force for driller slippde up in his operation. This cutter(Φ208)can cut 5”and 4 1/2” drill pipes and can also be lifted out from well together with the fish having been cut off. It you want to cut different drill pipes, must change the spring clamp suitable for the size of the drill pipe to be cut.