SAGD Multi-Pad Pass-By / Collision Avoidance

• →Three 12¼-in. (311 mm) intermediate sections requiring five complex pass-bys of recently drilled SAGD well pairs near Fort McMurray.
• →Offset laterals oriented ~70° to the drilling trajectory, with clearances as tight as ~11.5 ft (3.5 m), high collision risk.
• →Running a rotating-magnet system inside an intermediate BHA added mechanical load and reduced drilling flexibility; conventional anti-collision alone could not resolve true relative position.

Gunnar deployed the Torped™ at-bit rotating-magnet ranging system inside the drilling BHA, with the sensor operating in the nearest offset injector or producer. A custom magnet sub preserved drilling performance and held doglegs above 10°/100 ft, with reliable detection through casing initiated up to ~131 ft (40 m) ahead of each pass-by. Ranging fed the composite survey workflow to refine true offset positioning in real time.