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...Types of drilling rigs rt figure t top is a mast being raised by the bull lines and drawworks ourtesy abors industries td photo below shows hydraulic cylinders recision rilling ilfield ervices orp ith advent steel rig construction derricks were replaced masts has fewer pieces to assemble smaller footprint than derrick importantly it remains open on one side allowing traveling equipment run freely up down assembly i image introduction this chapter will explain various used today try touch unique features each structure be abandoned at well site ow could type their relative advantages drawbacks moved from ma or advantage enhance not meant an exhaustive narrative mobility original bulky was with but strives provide reader overview overriding theme that holds true regardless al industry made big changes lowing in design layouts all improve safety for people working these safeguard envi ronment efficiency minimie time nce location can either takes construct using ylinder land feature fully ...