通源石油：北美子公司与雪佛龙的合作主要为北美地区射孔业务

Group 1 - The core viewpoint of the article is that Tongyuan Petroleum's North American subsidiary is collaborating with Chevron primarily in the perforation business in North America, with no related business cooperation in other regions [2] Group 2 - The company responded to investor inquiries on an interactive platform regarding its business operations [2] - The collaboration with Chevron is specifically focused on the North American market [2] - There are currently no business partnerships with Chevron in other geographical areas [2]