NEW TECHNOLOGY COMBINES LOGGING AND MECHANICAL SOLUTIONS FOR RIG TIME SAVINGS

Background

Based on previous operations, a North Sea operator anticipated scale build-up on a producing, horizontal, offshore well and planned to run a multi-fingered caliper (MFC) to confirm the internal diameters over its length. This would allow the determination of the optimum depth for plug setting and tubing cutting.  Welltec®, selected as the tractor supplier, proposed an effective solution whereby the MFC and plug setting could be combined in a single run for increased efficiency.

RESULTS AND VALUE CREATION

A new innovation in downhole, wireless tool communication from Welltec® enabled the plug and setting tool to be run below the MFC tool without the requirement for thru-wiring. The tool assembly was conveyed to depth by the Well Tractor® and then the caliper was logged in real time to determine the optimal plug setting depth. The tool was conveyed back down to the required depth where a command was issued using the Welltec® Downhole Wireless Bridge to a non-explosive, electrically activated bridge plug. The setting sequence was initiated and completed successfully. After the plug was set, further real-time caliper logging was acquired providing tubing status and access confirmation for subsequent e-line runs.

ACHIEVEMENTS

This tool combination using the Well Tractor® and the new Welltec® Downhole Wireless Bridge eliminated one complete run, saving approximately 20 hours of rig time and costs. The increased efficiency of this service, including Well Tractor® speeds of nearly 100 feet per minute, provided a reduction in the risk of setting the plug in a scaled area and yielded critical data for optimizing the tubing cutting depth on the next run.