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The taper tap is a special fishing tool making thread in tube dropped object such as drill pipe and oil tube.The taps are turned from high trength alloy steel forging materials and heat treated.It is made with chip groove so as to make threads.The box tap is a special external fishing tool which is engaged on the outside wall of tubing objects such as oil tubing and drill pipe.
Table 1.Specifications for drilling taper tap
|
Specifications |
Thread connection |
I.D(mm) |
Catch size(mm) |
|
GN/NC31(2 7/8"IF) |
NC31(2 7/8"IF) |
20 |
48~60 |
|
GN/NC38(3 1/2"IF) |
NC38(3 1/2"IF) |
20 |
60~77 |
|
GN/NC50(4 1/2"IF) |
NC50(4 1/2"IF) |
25 |
89~103 |
|
GN/NC50(4 1/2"IF) |
NC50(4 1/2"IF) |
25 |
90~113 |
Table 2.Specifications for work over taper tap
|
Specifications |
Thread connection |
I.D(mm) |
Catch size(mm) |
|
GN/NC26(2 3/8"IF) |
NC26(2 3/8"IF) |
13.5 |
39~67 |
|
GN/NC31(2 7/8"IF) |
NC31(2 7/8"IF) |
20 |
54~77 |
|
GN/NC31(2 7/8"IF) |
NC31(2 7/8"IF) |
25 |
72~9 |
|
GN/NC38(3 1/2"IF) |
NC38(3 1/2"IF) |
30 |
88~103 |
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