Page 30 - Petroleum and Gas Field Processing
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Figure 6 A schematic of a rotary drilling rig.
through. The kelly is suspended by the hoisting system and is
connected at its bottom to the drill pipe and the bit.
4. Circulating System: The system consists mainly of drilling-mud
storage tanks, high-pressure pumps, circulating hoses and pipes,
and a shale shaker. Its function is to circulate the mud through
the well to bring the cuttings to the surface.
5. Drilling Bit: The drilling bit is the device that does the actual
drilling by crushing and cutting the rock as it rotates with some
force applied by the drilling string. There are different types and
shapes used for different types of rock.
Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved.
