The very complex wells in Mexico with robust well design using larger than standard casing sizes, require the best-in-class drilling techniques and technologies. BHA components that include underreamers, drilling jars, circulating subs, MLWDs and rotary steerable tools must work together in order to achieve maximum efficiency in drilling.
A special 2.72” OD activation ball and a special ball seat for a High Flow PBL Bypass Tool were designed and manufactured to fully address our customer’s requirements. This modification allows to properly activate and deactivate the underreamer (prior to the activation of the PBL Bypass Tool) and, in case of mud losses, preserves the ability to activate the High Flow PBL Bypass Tool despite the restricted ID of the drilling jar.
More than 20 successful jobs performed using this special High Flow (HF) configuration of PBL Bypass Tools with 9-1/2” and 8-1/4” tool sizes run in conjunction with different underreamer sizes (20” x 18-1/2”, 14-1/2” x 16”, 12-1/4” x 14-3/4”, 10-5/8” x 12-1/4”).