With standard wellbore clean-up tools, unable to circulate at a high flow rate for cleanout in an HP HT (350o F BHT), 16 ppg mud weight at a depth of 13,000 feet at the top of the 7” liner, and at the 5,000 feet depth in one run.
Position a 6-3/4” PBL Multiple Activation Bypass Tool as part of the wellbore clean-up string.
Open the ports of the PBL to allow a high flow rate (up to 1,000 gpm) at multiple depths in a single run.
By activating the PBL, at 2 locations in this high fluid weight, temperature and hole angle, and extreme depth, this was the only method available to allow for adequate cleaning and without making separate trips. The PBL Fast Dart allowed for the activation of the PBL, even in the heavy mud weight and hole angle. The PBL is ideally suited for a wellbore clean-up operation and should be placed above the wellbore clean-up assembly to offer multiple activation cleanout cycles, in extreme conditions.