Auto-Curve Technology Ran 2,500-m Liner to TD | SLB

Equinor saves 26 h of rig time with autonomous downhole control technology

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North Sea, Norway, Europe, 海上

Using the PowerDrive Xcel™ rotary steerable system (RSS) with auto-curve capability, Equinor reduced downlink commands by 42% and improved ROP by 20%. This saved 26 h of rig time and eliminated microdoglegs, leading to a smoother wellbore.

Equinor, operating on the Norwegian Continental Shelf in the North Sea, consulted with SLB engineers after four wells of a major initiative in late-life fields underperformed. The wells did not meet Equinor’s expectations due to steering adjustments with multiple downlinks and microdoglegs that resulted in ROP falling below 50 m/h. For a single-run bottomhole assembly (BHA), SLB engineers recommended the PowerDrive Xcel RSS deployed with the auto-curve component of the autonomous downhole control system. Auto-curve mode adjusts the steering ratio automatically based on required dogleg severity (DLS) and the toolface. This capability would help increase ROP and production in the mature wells.

With auto-curve mode, PowerDrive Xcel RSS successfully placed the 2,500-m liner smoothly to TD, reducing downlink commands by 42% and increasing ROP to 83 m/h. This saved 26 h of rig time for greater drilling efficiency, achieving 15-m/h higher ROP than steering sections in offset wells.

Equinor saves 26 h of rig time with autonomous downhole control technology.
PowerDrive Xcel RSS with auto-curve mode increased ROP to 83 m/h.
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