5 5/8 Inches TCI Tricone Bit , IADC537G , Geothermal Well Drilling Bits
|Formations||Medium formations,such as medium shale, limestone, medium sandstone, medium formation with harder and abrasive interbeds，etc.|
5 5/8" is a regular diameter in geothermal well drilling in Japan, Korea, Phillippine, drillers use normal direction mud fluid circulation or reverse circulation.
Reverse circulation drilling has very high rate in clearing rock chipes in hole bottom, the drilling speed is very fast in drilling pebbles, rock chips are circulated to ground directly other than breaking into very small chips.
|PDC Bits||Hole Opener||Roller Cones (Thirds)||Piling Roller Cones|
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