A major E&P company in Pakistan was drilling a well in the northern Punjab region. While drilling the 18 ½” section through a sticky shale formation, from 6,529 to 6,619 ft, no returns were observed confirming that they were facing total losses.
The operator pumped 100 bbl of LCM pill through the bit with no change observed. An additional three LCM pills were tried. There was still no improvement due to the LCM concentration and size limitations pumping through the BHA and drill bit.
The operator decided to POOH and run the DSI PBL® Sub in the BHA. During POOH, several tight spots were also observed, but with proper back-reaming, the operator managed to safely POOH. The static and dynamic losses during the operation were recorded as an average 10 and 25 bbl/hr.
A 9 ½” OD PBL® Multiple Activation Bypass System, with extended catcher sub, was incorporated into the next drilling BHA.
By adding the DSI PBL® Multiple Activation Bypass System to the BHA, the operator was able to control losses in a timely manner, substantially reducing rig time and expensive drilling fluid costs. As a result, the operator decided to have the PBL® in the upper sections of the hole as a standard component for the operations in the field. This would eliminate the need to POOH the entire drill string and BHA.
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