摘要
With further exploration and development of oil and gas fields both at home and abroad, complicated geological conditions, poor quality of reserves and abominable working environment, drilling business, the largest of upstream petroleum industry in terms of total investment and scale, is facing new challenges.China National Petroleum Corporation (hereinafter referred to as CNPC) is in urgent need of transforming development patterns of drilling, so as to enhance competitiveness, improve production efficiency, and increase economic profits.
With further exploration and development of oil and gas fields both at home and abroad, complicated geological conditions, poor quality of reserves and abominable working environment, drilling business, the largest of upstream petroleum industry in terms of total investment and scale, is facing new challenges. China National Petroleum Corporation （hereinafter referred to as CNPC） is in urgent need of transforming development patterns of drilling, so as to enhance competitiveness, improve production efficiency, and increase economic profits.
