This paper aims to report the field test results of several drill bits with enhanced hydraulic design features including optimum nozzle orientation and blade height as well as new patent-pending flow guide. These drill bits were developed based on numerous experimental and numerical tests. Computational Fluid Dynamics (CFD) was used to model the effect of various design features on bit hydraulics and then they were tested in Pressurized Drilling Lab (PDL). After the encouraging results of the experimental bits, several bits with enhanced hydraulic design were manufactured and sent to the filed for the final tests. The drilled formations were mostly soft to medium hard and ranged from shale to limestone. In most of reported cases, these bits outperformed the competition bits with Rate of Penetration (ROP) improvement ranging from 24% to 108% resulting in cost and time savings for operating companies.

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