Freeze and Hot Tap Case History #23

Objective: Hot tap 114.0mm gate valve.

Well Information: 3500 Kpa sweet gas well

Procedure: Assemble hot tap drill with ¾” bit and centralizer. Fill wellhead with oil and tie on hot tap drill. Pressure test to 5500Kpa then bleed off to 2000Kpa. Start drilling gate valve while monitoring pressures and adjust to stay under 5500Kpa. Drill through both halves of the valve and the pressure drops downs to 3500Kpa once through. Retract drill and close the top valve, bleed off pressure from the drill and rig out equipment.

Time on location: 1.5 hours