Page 142 - Drilling Technology in Nontechnical Language
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Chapter 5 – RIG SELECTION AND RIG EQUIPMENT                      133










































                 Fig. 5–18. Hoisting system schematic




                    Rotary equipment


                    As well as controlling movement of the drillstring up and down, it is
                 necessary to be able to rotate the drillstring. There are several ways of
                 achieving this rotary movement.
                    At the top of the rig substructure and the bottom of the derrick is a

                 platform called the drill floor, as explained previously. This is where the
                 rig crew works most of the time while tripping pipe in or out of the hole,

                 drilling, logging, and for most other operations (fig. 5–19). Somewhere in

                 the middle of the drill floor, directly underneath the crown and traveling

                 blocks, is a piece of equipment called the rotary table (fig. 5–20).









        _Devereux_Book.indb   133                                                 1/16/12   2:09 PM
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