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TerrAdapt bit adjusts to downhole conditions autonomously to enable smoother, faster drilling and extend tool life
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The TerrAdapt™ adaptive drill bit uses self-adjusting depth-of-cut (DOC) control elements to automatically adapt its aggressiveness to changing rock types and mitigate downhole dysfunctions. This expands the smooth drilling window and allows operators to achieve faster, more consistent ROP while reducing costs and NPT related to tool failures. (Photo: Business Wire)
The vast majority of well intervals are drilled through a variety of formations containing layers of different rock types, however, current polycrystalline diamond compact (PDC) drill bit designs feature a fixed DOC control setting that is optimized for only a single rock type. A fixed-DOC bit will drill smoothly in some areas but will perform erratically and inefficiently in others because of vibrations that occur when the bit transitions between different rock types, causing stick-slip. During stick-slip events, the bit’s bite becomes too aggressive, causing it to “stick” and stop rotating, while the drillpipe behind it continues to wind up like a spring until the bit releases, or “slips,” and begins spinning uncontrollably. These stick-slip events dramatically increase drilling costs by reducing ROP, and can seriously damage the bit and other expensive mechanical and electrical bottom hole assembly (BHA) components. When this happens, operators have to make extra trips to replace the bit/BHA, or continue to drill with diminished performance.
The TerrAdapt bit incorporates self-adjusting DOC elements that autonomously extend to create an optimal DOC based on the formation, preventing vibrations and stick-slip when the bit transitions between rock types or sections. When the risk of stick-slip has passed, the elements retract, enabling drilling to resume at a maximum ROP. The elements also absorb any sudden shock to the bit face, significantly reducing damage to the TerrAdapt bit’s cutters and other BHA hardware and electronics.
“I believe the TerrAdapt
adaptive drill bit is going to deliver a step-change in our
customers’ drilling efficiency,” said
bit is the first in a new line of adaptive bits that
TerrAdapt bits are the latest example of Baker Hughes’ strategy to improve well efficiency, optimize production and increase ultimate recovery.