Increased differential pressure and ROP for improved drilling performance
Enabled by the i-Power service simulations, the DynaForce motor outperformed conventional motors. The i-Power service used the geometry of the power section profile; elastomer,
dynamometer, and fatigue life testing; and downhole conditions to adjust drilling parameters to achieve the desired performance.
Compared with the previously drilled offset wells that used conventional motors, the thin-wall design of the DynaForce DTX motor generated a high power output—on average 20%–30% more
than conventional motors—to consistently deliver optimal torque and fully engage the PDC bit through the highly interbedded and abrasive sandstone and carbonate strata.
The high power output enabled the DynaForce DTX motor to perform at higher differential pressures, sustaining 350 psi [2,413 kPa] on average and reaching up to 470 psi [3,241 kPa]—an increase in maximum differential pressure by 57%—and improving ROP by 62% as compared with the benchmark. Based on the i-Power service simulations, the expected run life of the power section at 350 psi of differential pressure was 135 drilling hours, which closely aligned with the 132.5 hours of the actual run. The combination of increased differential pressure and improved ROP resulted in reduced drilling time for the entire 16-in section from 14 days to 9 days, with 3 days saved in the carbonate formations (Ratawi, Minagish, and Makul combined) and two days saved in the Zubair Formation.
For more details, see SPE-188937-MS.