Expandable reaming drills are highly efficient

Gauge Corporation of the United States has developed a expandable reaming drill that can be used for drilling from the simplest to the most complex deepwater.
The reliable ball control mechanism of the drill bit can be used to cut the edge of the blade to ensure that it can be used under fluid circulation and can stop the cycle after the blade becomes dull. This design eliminates the unreliability of earlier drilling pressure, flow and bottom hole pressure triggering.
The advanced pilot bit and expandable reaming bit can be drilled and reamed simultaneously, as well as the wellbore drilled by earlier pilot bits. The blade of the drill bit can be moved outward or upward at an angle to the radial direction and the tool can be retracted for system reliability measurements.
The new drill has the characteristics of a PDC bit with a monolithic structure of high tensile and fatigue resistant materials with surface hardened interchangeable wear pads that eliminate the tool's heat affected zone and crack propagation. Interchangeable nozzles on the cutting edge of the tool can be installed by computer hydrodynamic analysis to increase tool efficiency.
 

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