Tour (pronounced “tower”):

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.

Terms Related to Tour (pronounced "tower")

• Drilling crew

  A driller, a derrickman, and two or more helpers who operate a drilling or workover rig for one tour each day.

• Platform rig

  An immobile offshore structure from which development wells are drilled and produced. Platform rigs may be built of steel or concrete and may be either ...

• Absorber

  A vertical, cylindrical vessel that recovers heavier hydrocarbons from a mixture of predominantly lighter hydrocarbons. Also called absorption tower. See absorb.

• Absorption tower

  Also called absorber. See absorber.

• Derrickman

  One of the rig crew members who gets his name from the fact that he works on a platform attached to the derrick or mast, ...

• Mobile offshore drilling unit

  A drilling rig that is used exclusively to drill offshore exploration and development wells and that floats upon the surface of the water when being ...

• Blowout preventer

  1. One of several valves installed at the wellhead to prevent the escape of pressure either in the annular space between the casing and drill ...