• Published: 16 Jun 2011
  • Incident ID: 3203

Wellhead Oil Release

Cause & Consequence

  • Failure of vessels or pipework
Incident Consequence
Hydrocarbon release

Incident Location

Fixed Installation

Incident Activity

Production operations

Incident Info Source

Nikki Fell - Petrofac Facilities Management

Specific Incident Equipment

The release source was a cracked weld on a flanged spool bolted directly to an annulus connection on the wellhead.

Lessons Identified

No details available.

Incident Recommendations

Ensure that as-build drawings are correct - when the incident occurred the well drawings were assembled. The well schematic was found to be incorrect for the make up of the gas lift pipe work.Additional support should have been considered - the gas lift pipe work was isolated and a blind flange installed 3 years prior to the incident. The isolation was downstream of the spring hanger. With movement of the tree all the weight of the pipe work was absorbed by the connection from the 7" annulus.Remove redundant pipe work - the gas lift isolation could have been made at the 7" annulus outlet valve and therefore all the redundant pipe work could have been removed avoiding clutter.

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