AxeBlade Ridged Diamond Element Bit

Overview Library

Novel-geometry cutters deliver increased impact resistance and instantaneous ROP improvement

The newest 3D cutting element from Smith Bits, a Schlumberger company, the Axe ridged diamond element features a unique ridge-shaped geometry that combines the shearing action of a conventional PDC cutter with the crushing action of a tungsten carbide insert (TCI). Positioning Axe elements across the bit face results in the AxeBlade ridged diamond element bit.

Many previous improvements in PDC bit performance were the results of metallurgy and materials changes. That is, until the StingBlade conical diamond element bit was introduced with its unique cone-shaped cutting element. From the success of StingBlade bits, Smith Bits engineers sought to further improve bit performance by developing a new cutter geometry through extensive internal R&D and field testing. The new ridged design of the Axe element enables more efficient cutting and heat dissipation, while also having better frontal impact resistance which is achieved through a thicker diamond layer, proprietary blend of polycrystalline diamond grain-size distribution, and optimized materials.

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Ridged element combines shearing and crushing actions to cut rock more efficiently

Reduces cutting force requirement for less overall torque and less reactive torque fluctuation

Thicker diamond table on the element ridge increases durability to maximize ROP throughout the run.

Increased cutting efficiency for instant ROP improvement

Axe elements employ a unique geometry that cuts rock in a new way—a combination of shearing and crushing. This cutting method achieves at least 22% deeper penetration, removing more formation to provide higher instantaneous ROP when using the same WOB and rpm applied to conventional PDC cutters. The diamond table on the element ridge, which is 70% thicker than that of a conventional cutter, gives the Axe element increased frontal impact resistance. For operators, this means that the AxeBlade bit delivers improved durability and dull condition for maximum ROP throughout the run.

Field tests of the AxeBlade bit have demonstrated up to 29% improvement in ROP compared with similar bit designs using conventional PDC cutters, resulting in significant rig time and cost savings for operators.

Finite element analysis shows that the Axe element produces 22% deeper penetration than a conventional PDC cutter.

Enhanced control in directional applications

The reduced cutting force required by Axe elements translates to less overall torque, reduced reactive torque fluctuation, and better toolface control in curve applications. This advantage enables better build rates and higher overall ROP, helping maximize production zone exposure and minimize NPT by delivering better trajectory and well placement.

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