TQ340/35Y Casing Power Tongs is a type of casing tongs which adopts hydraulic drive, and widely used for making-up and breaking-out of 4"～13 3/8" pipe or casing in drilling operation of oil field. Open-throat design of the TQ casing tongs series allows the tongs to trip out of casing freely with high mobility. Planetary gearbox adopts air tyre clutch, and it can shift gear under running and work high efficiently. The tongs are designed and manufactured according to API Spec 7K “Drilling and well serving Equipment”.
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