Welltec® performed careful pre-job planning with the client, including extensive valve analysis and surface tests. Based on the well characteristics, the ideal tool configuration was a Well Tractor® and Well Cleaner® Wishbone Honer (WBH) with near bit centralizer. During the offshore operation a gauge run was first performed to ensure there were no restrictions in the well before reaching the SSSV depth.
Then the entire inner profile of the SSSV was cleaned with the Well Cleaner WBH while the well was still flowing at 2,100 BOPD. The entire operation was executed in only one hour of cleaning time. The SSSV was then function tested three times and proved to open and close normally, with a fully recovered seal.
The Well Cleaner WBH was 100% effective and successfully recovered the functionality of the SSSV. The e-line operation generated several benefits compared to alternative methods including reduced intervention times due to faster rig up and rig down, less equipment and fewer personnel mobilized. Since Welltec could perform the operation riglessly, the operator avoided mobilizing a drilling rig in case the completion had to be removed.
This would have added 14 days to the operation, not to mention the cost of deferred production. No acid was pumped, which avoided risk of completion damage. As a result of this successful operation more interventions with the Well Cleaner WBH are being planned to solve the seal problems in this region. Welltec’s e-line cleaning solution is now regarded as preventive maintenance instead of corrective
WELL TYPE: PRODUCER
MAX. DEVIATION: 34.6° @ 6,444 FT (1,964 M)