Lifting and Lowering Segment Spear which is a releasable fishing
tool, has not only the characteristics of large scope of salvage
but also the advantages of releasing fishes through direct lifting
after shaking up and down. During fishing operation, we have no
ideal of the exact size of the downhole, with little information
about general specifiaction the Segment Spear can be used to
retrieve the fallen objects.
Compared with other normal fishing tools, it is a new-type fishing
tool which can retrieve and release fishes, has perfect
performance, a large scope of salvage, and is simple in structure,
safe and reliable in use, easy to operate.