Matching Pairs Drilling RigOnline version Parts of drilling rig by Tatiana Yaikina 1 crown block 2 mud pit 3 travelling block 4 derrick 5 rotary drive 6 draw works 7 kelly Steel tank used as a mud collector. A hoisting mechanism which raises or lowers the drill pipe and drill bit. A steel pipe, located at the top of drill string. A steel frame on beams at the top of the derrick. A large structure standing on four legs and reaching the crown block. A machine used to impart rotational power to the drill string. A steel frame with wheels which moves up or down in the derrick
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