During well drilling process, the oilfield transmission (transmission
box for rotary table or turntable transmission case) is an important
unit used to transfer the power from DC motor to the rotary table.
Rotary table transmission can drive rotary table forward and reversibly.
It meets DP screw rotary operation; besides, torque releasing device
can ensure the torque is released before the DP distort. So, it is
suitable for all kinds of drill-pipe button’s rotating work.