Dating someone who works on an oil rig
RC drilling proved much faster and more efficient, and continues to improve with better metallurgy, deriving harder, more durable bits, and compressors delivering higher air pressures at higher volumes, enabling deeper and faster penetration.
Diamond drilling has remained essentially unchanged since its inception.
In the 1970s, outside of the oil and gas industry, roller bits using mud circulation were replaced by the first pneumatic reciprocating piston Reverse Circulation (RC) drills, and became essentially obsolete for most shallow drilling, and are now only used in certain situations where rocks preclude other methods.
Larger rigs are capable of drilling through thousands of metres of the Earth's crust, using large "mud pumps" to circulate drilling mud (slurry) through the drill bit and up the casing annulus, for cooling and removing the "cuttings" while a well is drilled.
Hoists in the rig can lift hundreds of tons of pipe.
Some light duty drilling rigs are like a mobile crane and are more usually used to drill water wells.
Larger land rigs must be broken apart into sections and loads to move to a new place, a process which can often take weeks.