Innovation drives efficiency in rigless well abandonment in Southern North Sea

In Brief
Innovation drives efficiency in rigless well abandonment in Southern North Sea
Capability
Well Abandonment
Region
Europe CIS
Objectives
  • Major North Sea operator to permanently abandon all wells and decomission their facility (first production 1996)
  • Five well campaign planned for 70 days
  • Delivered via rigless thru-tubing abandonment supported by a self-erecting jack-up barge
  • Challenges included potential salt accumulations in wells restricting wellbore access
Expro Excellence
  • Multi barrier perforation: a combination of existing technology (and Expro proven track record of perforating through multiple barriers using standard deep penetrating or big hole perforating charges) and new technology developed and tested
  • New technology: successful design, development, testing, build and delivery of three new PAC™ gun systems within 82 days of award
  • Delivered on slickline vs e-line
  • All guns (5 x 2.125" guns; 12 x 3.125" guns) run and successfully fired
  • A total of 12 cement plugs squeezed through the perforating zones to fully comply with abandonment regulations
  • Three successful tubing cuts performed, including cutting a triple encapsulated injection line to ensure no conduit was left through cement plugs
  • Client commendation received for performance
Value to client
  • No rig required: tubing remained in the well
  • No requirement for e-line: one PCE rig up per well which saved time
  • Reduced personnel costs: 3-man, multi-disciplined, intervention crew
  • Safe, cost-effective, technology-driven solutions

New technology: Owen's PAC™ (Plug & Abandonment - Circulation)

A long-term working relationship between Expro and Owen Oil Tools contributed to the accelerated design, development and delivery of the three new PAC™ gun systems:

  • Superior option to standard tubing/casing perforators
  • 0-360 degree coverage
  • Large diameter exit holes
  • Designed and developed to produce limtied damage to secondary string regardless of primary to secondary string orientation
  • Multiple tubing/casing string penetration
Contact

For further information, please contact:

kevin.illingworth@exprogroup.com