key learning DWC :- [note: special thanks to Vikas for providing us these notes of DWC]
Different system in rig:
-power system
-hoisting system
-circulating system
-rotary system
Various part of rig:
Power system-mechanical drive
-DC generator(diesel power internal combustion engine or it is internal combustion engine used to provide electricity–Prime mover )
-AC generator
Used:-
-for draw works
-mud pumps
-rotary table
-Mechanical drive-wheel,chains
-most widely used –AC-SCR system
SCR-silicon controlled rectifier
-formula for Horse power=load/efficiency
Where efficiency <1.
Efficiency factor(E)=energy(output-input)/energy output
Where E=(0-1);
-output is from prime mover’s.
-losses in form of friction
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