摘要
In the afternoon of Oct. 10, 2005, China National Petroleum Corporation （CNPC）, China Petrochemical Corporation （Sinopec）, China National Offshore Oil Corporation （CNOOC） and Schlumberger jointly celebrated 25 years of cooperation between China petroleum industry and Schlumberger at Diaoyutai State Guesthouse. The successful accomplishment of logging operation by Schlumberger in Ren 28 well of North China Oilfield, its first logging service in China, 25 years ago marked the beginning of friendly cooperation between Schlumberger and China Petroleum Industry. In view of the requirement of China Petroleum Industry,
