Stuck safety valve passes its inflow test again

Before BLUESPARK® Treatment

After BLUESPARK® Treatment

Challenge

The SSSV of the well of a major operator in the Danish North Sea had previously failed an inflow test and was reactivated by BLUESPARK® at that time. The SSSV was failing the inflow test again a year later and was believed to be in a stuck open position. It was decided to use BLUESPARK® again to clean scale from the SSSV to reactivate it.

• Offshore conventional oil field
• CaCO3 scale
• Depth: 1900 ft (580 m)
• Temperature: 62 °C (144 °F)

Solution

Remove scale from SSSV to restore functionality using electro-hydraulic pulsing technology.

• The BLUESPARK® 275 tool with Fluid Hold-Up Tool (FHUT) was run on third-party E-Line to the treatment interval
• Two complete passes, a pass over the flow-tube, and a station at the flapper of the SSSV were completed in a treatment time of 11 hours
• Camera images were obtained to compare to images made before the BLUESPARK® treatment

Outcome

• The SSSV was cleaned of CaCO3 scale and now passed the inflow test
• Camera images confirmed that scale had been removed from the SSSV