Top drive
25 July 2017
Two and three arm system
25 July 2017

Tour (pronounced “tower”)

A working shift for drilling crew or other oilfield workers. The most common tour is 8 hours; the three daily tours are called daylight, evening (or afternoon), and graveyard (or morning). Sometimes 12-hour tours are used, especially on offshore rigs; they are called simply day tour and night tour.