Drill bits technology - introduction of the new kymera hybrid bit
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- Master's theses (TN-IPT) 
The early concepts of hybrid bits date back to the 1930’s but have only been a viable drilling tool with recent polycrystalline diamond compact technology. Improvements in drilling performance around the world continue to focus on stability and efficiency in key applications. This thesis briefly describes a new generation of hybrid bits that are based on PDC bit design combined with roller cones. Bit related failure is a common problem in today’s drilling environment, leading to inefficiencies and unnecessary downtime. Many efforts are developing to control and reduce these problems. Kymera, the most-recent design of hybrid bit from Baker Hughes proves to be an effective solution in highly interbedded and hard formations. This innovative technology has shown in field test runs presented in this thesis that it can perform much better in footage drilled, torque fluctuations, rate of penetration, tool face control and dull condition than conventional bits. The introduction of this unique solution brings new opportunities to improve performance in potentially difficult applications. However, the concept is still under a testing phase and continues to develop. With the rapid acceleration in technology, the Kymera could be a game-changing drill bit and obliterate conventional bits in the future.
Master's thesis in Petroleum engineering