CE-SR-140 (Netherlands)
CHALLENGE
A major operator in the Netherlands was having difficulty retrieving a Wireline Retrievable Safety Valve (WRSV) that was no longer functioning properly. It was thought that Barium Sulphate scale (BaSO4) was one of the main factors. The operator wanted a safe method of removing the scale, without risking damage to the WRSV. There would also be no fluid in the well during the treatment.
SOLUTION
Remove BaSO4 scale from the WRSV to aid in retrieval using electro-hydraulic pulsing technology.
A miniature Fluid Hold-Up Tool (mini FHUT) was designed and built specifically for this well due to the lack of fluid in the wellbore.
The BLUESPARK® slimhole tool was run on third-party E-Line with the mini FHUT so as to provide a fluid environment in the wellbore while getting as deep into the WRSV as possible.
Three runs of BLUESPARK® were made, treating the WSRV and the flow coupling.
Chemicals were also circulated over the WRSV.
CONDITIONS
Temperature: 20 °C (68 °F)
Depth: 100 m (330 ft)
OUTCOME
The mini FHUT was successful in holding a fluid column in the wellbore so that the pulsing was occurring in the required environment.
A camera was run before and after the 1st BLUESPARK® run and it confirmed that scale was removed.
After the BLUESPARK® and chemical treatments, the WRSV was successfully retrieved from the wellbore.
Blue Spark Energy is paving the way towards a sustainable, dynamic oil & gas industry. As leaders in high-pulse powered wellbore remediations, we provide a revolutionary technology that is a safe, cost-effective, and efficient solution for forward-thinking energy providers.
