The first part of the operation was to drift the well to ensure the tubing was clear from obstructions. Once successfully drifted, a plug was run in hole on the Well Tractor® 318 to test the integrity of the production tubing and then retrieved with the Welltec Stroker® 318 once this was confirmed. A custom 2.46″ milling bit was run in hole on the Well Miller® conveyed by a Well Tractor 218 to remove the glass plug. Once the specially designed milling bit was engaged on the glass plug, surface read-out indicated milling had begun and the Well Miller broke through the plug in just nine minutes. A drop in surface pressure also indicated the successful removal of the glass plug. The depth and CCL confirmed access as the toolstring went past the glass plug a total of three times.
Total milling time for the glass plug was nine minutes. Access to the reservoir was established and the operation saved an estimated four days and 450,000 USD compared to conventional CT operations. The operator was pleased with the operational success as well as the professionalism of the Welltec crew.
MAX. DEPTH: 31,140 FT
MAX. TEMPERATURE: 135°C
HYDROSTATIC PRESSURE AT DEPTH: 3,200 PSI
MAX. DEVIATION: 90°