Depending on what part of the rig I was working at the job differed. If I was working on the Derrick ( 70 feet high off the ground) before climbing up I always ensured that my harness was in good condition as well as the safety retraction line inspected them daily. Once I was up there I ensured if we were running the tubing back into the oil well I had to safely latch up the tubing into the tubing elevators yell "latched up" for safety purposes before the rig runner when down with the tubing. If we were pulling out of the oil well with tubing would yell "unlatched" for safety purposes so the rig runner would know when I was ready. If I was working the tubing tongs ( floor hand) I inspected our machinery before using ensured no damage was done. If we were running in the hole I'd safely thread back the tubing with tubing tongs. If pulling out of the oil well id safely unthread the tubing with the tubing tongs. Working the pipe wrack picking up 100-150 pounds of tubing for hours safely of were tired always swap out with another crew worker or stop for little water breaks for safety purposes. Used heavy tools such as sledge hammers, chains, 36-48 inch pipe wrenches, crescent wrenches, and many more.