“With the Kymera solution, we’ve had consistent one-run curves with good penetration rates,” said Spencer Bryant, a drilling and completion engineer for Cimarex. “It’s rare to have a two-bit curve with the Kymera hybrid technology.”
The Kymera FSR? directional hybrid drill bit—designed to be the fastest, most consistent bit in the curve—drills to total depth (TD) with fewer bits, less nonproductive time (NPT), and better overall drilling economics.
Drilling the curve through challenging carbonates typically takes two or more bits when using individual polycrystalline diamond compact (PDC) or tricone roller cone bits. While PDC bits drill quickly, they create reactive torque that can, in turn, send the bottomhole assembly (BHA) off its intended trajectory. That excessive vibration can also in?uence downhole tool failure, increasing the odds of additional trips, part repair, and NPT. Roller cone bit screate less vibration for better directional control, but drill more slowly.
The best of both bit worlds
By focusing on the best attributes from both the tricone and PDC bit designs, the new directional Kymera hybrid bit drills faster, smoother, and more consistently for precise steerability in challenging carbonate formations. The sharper tungsten carbide insert (TCI) teeth of the roller cones cut and crush hard rock, while the PDC cutters sweep away the remaining rock and effectively clean the borehole. The balance of the two cutting structures provides better tool face control and cutter protection, keeping torque in check and eliminating excess energy to the drillstring.
Speed made easy, every time
With energy focused where it needs to be in a smooth borehole, tools in the drillstring can be more effective, and directional drillers can spend less time correcting trajectory. In the case of the new directional Kymera bit, with its increased efficiency, the result is a consistent show of rate of penetration (ROP) exceeding and at times doubling that of the fastest PDC and tricone bits. And on a majority of curve runs, it only takes one Kymera bit to reach TD. The resulting smoothness and ease of the run has an added benefit of drilling at high buildup rates (BURs)—a pay zone win.
Operators can now consistently tackle directional drilling faster, on target, and with fewer bits—a feat rarely achieved by other bit types. For more information on how the new directional Kymera hybrid drill bit can speed through the curve faster and more economically, contact a Baker Hughes representative today, or visit bakerhughes.com/FastCurve.
Applications
1.Directional drilling;
2.Interbedded carbonate formations;
3.Unconventional plays with high BUR curves and extended-reach laterals.
Features and benefits
1.Hybrid bit design:
??? –Improves borehole quality;
??? –Reduces wear on cutters to maintain higher ROP than individual PDC and tricone bits;
??? –Provides better tool face control;
??? –Improves efficiency.
2.Rolling torque management:
??? –Reduces fluctuations in torque for smoother drilling;
??? –Reduces downhole tool failure;
??? –Provides higher BUR and more pay zone;
??? –Keeps the bit on course.
Kymera FSR Directional Hybrid Bit Achieves Record ROP in Three Curve Sections, Saves USD 503,122
Location: Eagle Ford Shale, Karnes County, Texas
Challenges
1.Directional issues through the Austin Chalk and Anacacho formations;
2.High reactive torque when using PDC bits;
3.Drilling the curve may take several attempts and bits;
4.Frequent downhole motor failure.
Baker Hughes solution
Kymera FSR directional hybrid drill bit
Results
1.Set new ROP field record for this operator at 46 ft/hr (14 m/hr);
2.Achieved 125 ft/hr (38 m/hr) instantaneous ROP;
3.Completed curve sections in three wells in single runs;
4.Pulled bits out of hole in excellent condition;
5.Reduced CPF by an estimated 36%;
6.Saved USD 503,122.
Kymera FSR Hybrid Bit Tames Curve in One Run and Drills Twice as Fast, Saves Operator 18 Hours
Location: Reeves County, West Texas
Challenges
1.Interbedded conglomerate formations that includes the Third Bone Spring formation, a section
with rock strength varying between 10,000 to 20,000 psi;
2.Difficulty in drilling through the curve and achieving the right build rate in one run when using PDC bits;
3.Increased WOB led to high torque issues when drilling with PDC bit.
Baker Hughes solution
8-3/4in. Kymera FSR directional hybrid drill bit
Results
1.Drilled an average ROP of 38.8 ft/hr (11.9 m/hr) compared to the offset average ROP of 18.0 ft/hr (5.5 m/hr);
2.Held consistent build rates in excess of 14°/100 ft on a 2.12° AKO;
3.Completed the curve with one bit.
Directional Hybrid Bit Drilled 6400 Feet in One Run andSaved 58 Hours of Drilling Time
Location: Eastern Romania
Background and challenges
1.Medium compacted claystone with sandstone intercalations and poorly consolidated quartz sand;
2.Minimize drilling time and produce excellent borehole quality.
Baker Hughes solution
Kymera FSR directional hybrid drill bit
Results
1.Saved 58 drilling hours in one run;
2.Drilled four times further than a standard polycrystalline diamond compact (PDC) bit;
3.Drilled 84% faster than a standard PDC bit.
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