Taper tap


  1. Designed and manufactured according to API spec 7-1.
  2. The tool is used to go engage the outside diameter of a fish.
  3. It is engaged on the outside wall of tubing objects.
  4. It is manufactured from high alloy steel and is special heat treated.


The taper tap is a special tool cutting thread and fishing internally in dropped objects such as tubing, drill-pipe, wash-over pipe, packer, water flow allocators, and down-hole production allocators. The tool is especially a great success in catching objects accompanied by couplings. The taper tap can affect different fishing operations when equipped with RH thread or LH thread drill pipes and other tools.


Type Connection Overall Length inch Fishing I.D.Range inch
GZ-NC31-LH-1 NC31 LH 63-9/32 1-17/32~2-3/32
GZ-NC31-2 NC31 22-23/32 2-13/64~2-23/64
GZ-NC38-7 NC38 33-55/64 3-5/16~4-11/64
GZ-NC38-8 NC38 33-55/64 4-11/16~5-35/64
GZ-NC38-9 NC38 37-13/32 3-13/16~4-59/64
GZ-NC38-10 NC38 27-61/64 3-27/64~3-15/16
GZ-NC50-11 NC50 44-31/64 3-1/4~4-49/64
GZ-NC50-12 NC50 36-5/8 2-3/4~3-3/4


taper tap drawing

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