MODEL XQ140/20 HYDRAULIC POWER TONG OPERATION MANUAL
YANCHENG TEDA DRILLING & PRODUCTION EQUIPMENT CO.,LTD
3. Structure characteristics and working principle
Hydraulic power tong consists of two main parts----master tong and backup tong.
The backup tong clips coupling or joints, (It can also clip the pipe body by lengthening
the front and back guide poles as required.) and the master tong clips pipe string,
turns clockwise or counter-clockwise, in this way, it completes making-up or
breaking-out operations.
3.1 Transmission System
Hydraulic power tong has four shifts to reduce speed, as shown in figure 1.
Low Gear Engagement: Z2, Z1, Z3, Z5, Z6, Z7, Z11, Z12, Z13
Second Low Gear Engagement: Z2, Z1, Z3, Z5, Z10, Z11, Z12, Z13
Second High Gear Engagement: Z2, Z4, Z6, Z7, Z11, Z12, Z13
High Gear Engagement: Z2, Z4, Z8, Z9, Z10, Z11, Z12, Z13
Fig 3-1 Transmission Diagram
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