Snubbing Case History #3
Objective: Remove 114mm frac string and install 73mm completion system.
Well Information: 28 Mpa sweet gas well, depth: 3,400m.
Procedure: Rig up required riser spool and snubbing unit, and pressure test. Release frac packer, strip out tubing hanger and POOH and lay down114mm tubing and BHA. Change over handling equipment to 73mm. Strip in BHA, and RIH 73mm tubing. Space out BHA, strip in tubing hanger, latch into permanent packer, set top packer, and land tubing. Pull plugs and pressure test seals. Rig out snubbing unit.
Time on location: 73 hours over 4 days