top drive system of drilling rig
Keywords
rig,
oil,
top,
drive,
drilling,
industry,
offshore,
drill,
crude oil,
pipe,
system,
derrick,
gas,
collar,
crane,
platform,
floor,
container,
racked,
block,
track,
technical,
rotate,
mast,
joint,
oilfield,
technology,
power,
energy