FYI...there was a casing crew guy killed last week around Fort Stockton, Texas; when he fell on top of the traveling blocks and was cut in half. The rig type was a Super Single.
I was the Field Geologist (Mudlogger) on that rig.
Ugh, poor fellow. We had a guy on a rig get caught in the chain that drove the rotary table. Caught him right about belt height. Was stepping over the chain instead of walking all the way around like you were supposed to. Was alive for a couple hours so they could get his wife there. Very sad. I was on the roustabout waiting list before that, took my name off afterwards. Was great money at the time. I stuck to pumping the wells, draining saltwater and cutting the weeds.
I imagine OSHA rules and common sense eliminate many of those hazards from back in the day. Still dangerous, I'm sure but some stuff was just over the top dangerous.