THE APPLICATION OF φ118MM ZUBLIN BIT IN ZHONGYUAN OILFIELD

Zublin bit penetrates by cutting the rock, which is a powerful and highly efficient work model, and suitable for drilling deep wells. The rotation speed of the roller is slower than the bit rotation, which is of essential for the efficient operation of the downhole motor, and comparing to the PDC bit, Zublin bit can be widely used in various formation conditions. The small size Zublin bit is successfully used in Zhongyuan Oilfield; it achieves an average ROP of 1.77 m/h and a 21.8% hole enlargement, which is good for cementing in the slim hole.