Group 1 - The State Intellectual Property Office of China has granted a patent for a method and related equipment for calculating large-scale natural fracture lengths to China National Petroleum Corporation West Drilling Engineering Co., Ltd. and China National Petroleum Corporation [1] - China National Petroleum Corporation West Drilling Engineering Co., Ltd. was established in 2008, located in Karamay City, with a registered capital of 1,086,100,000 RMB [1] - The company has made investments in 6 enterprises, participated in 5,000 bidding projects, and holds 2,317 patents along with 6 trademark registrations and 29 administrative licenses [1] Group 2 - China National Petroleum Corporation was established in 1990, located in Beijing, with a registered capital of 48,690,000,000 RMB [1] - The corporation has invested in 109 enterprises, participated in 5,000 bidding projects, and holds 5,000 patents along with 1,439 trademark registrations and 28 administrative licenses [1]