Application and development of PDC bits in Zhongyuan oilfield

From statistic analysis of PDC bits that have been used in Zhongyuan oilfield from 1988 to 2001 , the application and development of the bits in the oilfield are descried by contrasting the new bits with old ones and selecting them with electric logging plot. The penetration rate of PDC bits and drill footage of single bit increasing year by year show that greater development are achieved in PDC bit manufacturing techniques, bit selection and field application. Because the penetration rate could be greatly improved by using the PDC bits so as to reduce the composite costs of drilling, they have wide prospects of application.