Freeze and Hot Tap Case History #15

Objective: Remove malfunctioning slim-hole valve.

Well Information: 8,000kPa sweet gas well. Approximately 35m of sand was cleaned off a bridge plug after a fracture stimulation using a snubbing unit and slim-hole safety valves. The bridge plug was released. The first valve in the well bore was brought to working height and closed. Clean out package was removed hose connected to tubing above valve. Joint pulled and next valve positioned and closed. Top valve equalized but would not open.

Procedure: Hot-tap clamp and drill installed above lower valve and pressure tested. 12.5mm hole drilled in tubing, drill removed, and pressure vented to testers.

Time on location: 1 hour