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Type B tongs is a necessary tool for buck-on and buck-off drill pipe and drill collar and casing connector during the process of drilling well and workover.
The fastening tongs size changed by replacement of fastening tongs and shoulders.
Diameter range：3.3/8-13.3/8in；MAX torque：75kN.m;
Design and manufacture by API SPEC 7k.
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Fastening Tongs :
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Shoulder
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Diameter range mm（in）
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Max torque kN.m
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5a
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1
2
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86-105(33/8-41/8)
105-133(41/8-51/4)
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55
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5b
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1
2
3
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108-133(41/8-51/4)
127-146(5-51/4)
152-171(6-63/4)
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75
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5b-1
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1
2
3
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133-146(5-6)
146-168(6-7)
168-208(7-8)
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75
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5c
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1
2
3
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168-187(65/8-73/8)
187-203(73/8-8)
216-219(81/2-85/8)
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75
55
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5d
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1
2
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216-244(81/2-95/8)
270-273(105/8-103/4)
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55
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5e
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1
2
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298(113/4)
324(123/4)
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55
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5el
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1
2
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273(103/4)
298(113/4)
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55
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5e3
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1
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330(13)
340(133/8)
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55
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