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Steel BB drilling. ProDril Services, Inc. (PSI) of Cody, Wyoming, has developed a new drilling technique that increases the rate of penetration (ROP) and extends bit life. PSI conducted a series of field tests at the Rocky Mountain Oilfield Testing Center (RMOTC) out of Casper, Wyoming, ending in January, to demonstrate the process under different downhole conditions.
The PSI process adds steel shot (BBs) to the drilling mud system. The BBs enter the mud system through the surface equipment and are transported to the drill bit along with the mud. As the BB-laced mud hits the bit, it is subjected to a drastic increase in velocity at the drill-bit jet, and the steel shot hits the formation like sand blasting, which causes the formation to weaken. This allows the bit to cut through the weakened formation at a faster rate and increases ROP.
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