Varco HT-Tong HT100, Руководство пользователя

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4
Installation and
Commissioning
HT-Tong
4-17
Installation and commissioning
General procedure
1. To install the HT Tong, the tong support line should be connected to a suspension
ring.
2. Install the right lug and/or hinge jaw, to cover the correct size range. Ensure that the
tong is capable of handling the torque required. See tables in chapter 2.
3. For easy tong operation, freely suspend tong up by the tong support line as close to
the center of the rotary table as is conveniently possible. This reduces the arc of
swing and the distance that the tong must travel to the table.
4. With jaws open and free from pipe, balance the tong. Carry this out from lever to
latch and from side to side by adjusting the hanger adjustment bolt / screw, and / or
the balancing screw. For best operation the long jaw should be about 1” lower than
the short jaw.
5. The pull line must than be connected to the end of the lever. A back up line, sized to
safely withstand the tong torque rating, should in all cases be connected to secure
safe operation.
6. A Varco BJ tong pull back can be installed which automatically re-positions the tong
for another take-up.