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2020 2nd alert HiPo#29 (Drops) Slick line tool dropped from lubricator
While slickline lubricator was lowered, sudden release of tool string BHA (~200 kg) stuck inside the lubricator led to a fallen object (3.5 m height) on rig floor near to well center and release of trapped pressure (~11,000 kPa).
Full-bore lubricator with same ID is recommended. Always have BHA against the stuffing box prior to changes in pressure in the lubricator (pressure test, equalization, opening the well, etc …) Always prepare & review a stack-up diagram to avoid pulling bigger OD into smaller OD. Ensure that SOP are regularly reviewed and updated to capture the learnings from incidents.

Category:Second AlertsDocument Type:Safety
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