Retrieve toolstring to resume production
The wireline toolstring was lost in a horizontal offshore oil well, and
as a result, the client had to stop production. Moreover, the logging schedule
had been affected due to the limitation of available tools. Retrieving the
250-lbm [76.2-kg] toolstring would be difficult, as surface weights are
generally poor indicators of manipulation and can be inaccurate due to complex
well geometries and unknown well parameters.
Detect downhole weight differences
Schlumberger used ACTive family of live downhole coiled tubing services
to detect even the smallest difference in downhole weights. The ACTive TC tool
enabled tagging, latching, and retrieval of the fish to be clearly identified
during the operation with absolute confidence.
Confirm pulling out fish using ACTive TC tool
As read, the tension while pulling out the fish demonstrated a 270-lbf
[1,201-N] increase when compared to normal pulling tension. This reading could
never have been achieved using surface parameters and gave a positive
indication of the fish being pulled out along with the CT.
The ACTive TC tool enabled the retrieval of the 45-ft [13.7-m]
production logging toolstring in just 36 hours, after which production resumed
without issue.
