Outside-In Re-Entry: Reaching Wells Everyone Else Gave Up On

Damaged casing, stuck packers, lost tools and no surface access don't have to mean a lost well. By ranging to the target and milling in from outside, Gunnar restores a path into wellbores that conventional intervention has written off.

When the front door is blocked

Some wells simply won't let you back in. Collapsed casing, a stuck packer, a fish left in the hole, an unrecorded sidetrack, years of corrosion or poor documentation of the wellbore's state can make conventional re-entry impossible. You can work at it indefinitely and never make forward progress.

The instinct is to keep fighting from surface, down the original path. Often that path is exactly the problem.

Range, then mill in

Gunnar drills a new path alongside the target, uses active ranging to guide the trajectory and contact the target casing precisely, then mills in from outside to re-establish communication, bypassing whatever blocks the original bore. It is the relief-well technique applied to intervention.

Built for tight, live wells

The 3.5-inch CTRWD™ system carries a ranging source, sensor and milling capability on coiled tubing, in a form factor small enough to mill, re-enter and clean out the inside diameter of the target wellbore. Because coiled tubing can work under pressure with continuous well-control barriers, operations that would be unsafe on a conventional rig become routine.

That combination, range, exit, steer, mill and re-enter, handles motherbore exit-and-re-entry, below-fish access and high-inclination scenarios that defeat standard tools.

Restored for any purpose

Once access is re-established, the well can be returned to production, brought back into integrity compliance, or permanently abandoned. The point is optionality: a well that was a write-off becomes a decision again.