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→Drill ships
===Drill ships===
===Drill ships===
The drilling apparatus on a ''drill ship'' is mounted in the center of the ship over a ''moon pool'', which is a reinforced hole in the bottom of the ship through which the drill string is raised and lowered ([[:file:offshore-rigs_fig4.png|Figure 4]]). The ship can be turned into the oncoming wind or currents for better stability, and it can operate in water too deep for anchors.
The drilling apparatus on a ''drill ship'' is mounted in the center of the ship over a ''moon pool'', which is a reinforced hole in the bottom of the ship through which the [[drill string]] is raised and lowered ([[:file:offshore-rigs_fig4.png|Figure 4]]). The ship can be turned into the oncoming wind or currents for better stability, and it can operate in water too deep for anchors.
==See also==
==See also==