Talon 3D PDC Bit Dramatically Increases Drilling

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Case History

Talon 3D PDC Bit Dramatically Increases Drilling Efficiency in Challenging 12° Tangent, Curve, and Lateral Section Bit drills entire 9,715-ft section at average speed of 79.3 ft/hr

Benefits „„Improved

drilling efficiency and penetration rates in the tangent, curve, and lateral hole section

„„Reduced

drilling time and cost

„„Optimized

gauge to reduce bit walk and NPT

„„Increased

junk slot area to improve cleaning and reduce balling

Well background and challenges „„Eagle

Ford shale play

„„Operator

needed to stay within directional targets in a challenging 12° tangent, curve, and lateral section, which kicked off in limestone and landed in shale

Baker Hughes solution and results „„Two

Baker Hughes Talon drill bits and two bottomhole assemblies drilled the entire well

„„Completed

the well in nine days (compared to 11 to 12 days) with seven days of on-bottom time (compared to 8 days)

„„Both

bits were removed from the hole in good condition

An operator working in the Eagle Ford shale in South Texas challenged Baker Hughes to drill a challenging 12° tangent, curve, and lateral section in a single bit run. For this run, which kicked off in limestone and landed in shale, Baker Hughes recommended a Hughes Christensen 8 ¾-in. Talon™ 3D high-efficiency, vector-accurate PDC drill bit. Specifically designed through the Baker Hughes DART™ drilling application review process, the bit included wider gauge pads to increase borehole coverage and help reduce sliding time and bit walk. The size of the junk-slot area was also increased to improve cleaning and reduce cutter balling. A 12 ¼-in. Talon high-efficiency surface bit drilled the first 2,483 ft (757 m) of the well. An 8 ¾-in. Talon 3D vector-accurate bit then drilled the entire 9,715 ft (2,961 m) tangent, curve, and lateral section in one run, at an average speed of 79.3 ft/hr (24.2 m/hr). From spud to total depth, the entire project required just nine days, with seven days of actual on-bottom drilling time. These results compare favorably to the field average of 11 to 12 days to reach total depth, with approximately 8 days of on-bottom drilling time. When pulled from the hole, the 8 ¾-in. Talon bit had no damage on the inside cutting structure and only a few chipped cutters in the outer row. The operator was extremely pleased by the success of this operation and plans to use Talon bits for other wells in the field.

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