Core Viewpoint - China National Petroleum Corporation (CNPC) has applied for a patent for a "retractable casing centralizer and centralizing method," indicating ongoing innovation in the oil and gas sector [1] Group 1: Patent Application - The patent application, published as CN121429298A, was filed on July 2024 and pertains to the technology of casing centralizers [1] - The invention includes a retractable casing centralizer featuring a body pipe with several radially through installation holes, which are equipped with bosses [1] - The design aims to provide a simple, effective, and easy-to-install retractable casing centralizer and method [1] Group 2: Company Overview - China National Petroleum Corporation was established in 1999 and is headquartered in Beijing, primarily engaged in oil and gas extraction [1] - The company has a registered capital of 18,302,097 million RMB [1] - CNPC has invested in 1,299 enterprises and participated in 443 bidding projects, holding 38 trademark records and 5,000 patent records, along with 168 administrative licenses [1]