Group 1 - The company provided a credit guarantee of 30 million USD for its wholly-owned subsidiary COSL Middle East FZE [1] - The guarantee is set to expire on August 17, 2028 [1] - The matter has been approved by the company's board of directors and the 2024 annual general meeting of shareholders [1] Group 2 - The guarantee falls within the authorized limit approved at the 2024 annual general meeting [1]

Group 1 - China National Offshore Oil Corporation (CNOOC) and CNOOC Oilfield Services Co., Ltd. applied for a patent for a "Downhole Wireless Data Receiver and Direct Reading System" with publication number CN120498461A, filed on June 2025 [1] - The patent involves a downhole wireless data receiver that includes an electronic circuit assembly, antenna short section assembly, and quartz pressure sensor assembly, designed for measuring pressure and temperature parameters [1] - The components of the wireless data receiver are connected using quick-rotating nuts, allowing for easy disassembly [1] Group 2 - CNOOC was established in 1983, located in Beijing, primarily engaged in oil and gas extraction, with a registered capital of 11,380 million RMB [2] - CNOOC has invested in 45 companies, participated in 5,000 bidding projects, and holds 281 trademark records and 5,000 patent records [2] - CNOOC Oilfield Services Co., Ltd. was founded in 2001, based in Tianjin, focusing on business services, with a registered capital of 477.1592 million RMB [2] - CNOOC Oilfield Services has invested in 11 companies, participated in 5,000 bidding projects, and holds 273 trademark records and 2,376 patent records [2]

证券日报网讯 8月14日晚间，中海油服发布公告称，公司2025年半年度业绩说明会定于2025年8月27日 （星期三）10：00-11：00召开，会议地点为香港中区法院道太古广场港岛香格里拉酒店5楼香岛殿C， 会议方式为现场结合电话会议。参加人员包括董事长兼首席执行官赵顺强先生、副总裁兼董事会秘书孙 维洲先生、首席财务官郄佶先生及一名独立非执行董事等。 （文章来源：证券日报） ...

证券代码：601808 证券简称：中海油服 公告编号：临2025-018 中海油田服务股份有限公司 关于召开 2025 年半年度业绩说明会的公告 特别提示 本公司董事会及全体董事保证本公告内容不存在任何虚假记载、误导性陈述或者重 大遗漏，并对其内容的真实性、准确性和完整性承担法律责任。 重要内容提示： 会议召开时间：2025年8月27日（星期三）10:00-11:00 会议召开地点：香港中区法院道太古广场港岛香格里拉酒店5楼香岛殿C 会议召开方式：现场结合电话会议 电话会议拨入号码： 如投资者决定通过电话参加会议，请联系SPRG_COSL@sprg.com.hk或致电(852) 2864 4890、（852）2114 2825、（852）2864 4894获取电话会议拨入密码。 投资者可于2025年8月21日（星期四）23:59前将相关问题通过电子邮件的形式发 送至中海油田服务股份有限公司（下称"本公司"或"公司"）投资者关系邮箱： cosl@cosl.com.cn。本公司将于2025年半年度业绩说明会（以下简称"本次业绩 说明会"）上对投资者普遍关注的问题进行回答。 会，就投资者普遍关心的问题进行交流。 一 ...

Company Overview - China Oilfield Services Limited (COSL) is a major integrated oilfield service provider globally, offering services across all stages of offshore oil and gas exploration, development, and production [1] - COSL's business is divided into four main categories: geophysical exploration services, drilling services, oilfield technical services, and marine services [1] Stock Performance - On August 14, the Shanghai Composite Index fell by 0.46%, closing at 3666.44 points, while the Hang Seng Index decreased by 0.37%, closing at 25519.32 points [1] - COSL's A-shares closed at 13.87 yuan, down by 1.0%, and its H-shares closed at 7.19 Hong Kong dollars, down by 0.28% [1] - The A/H premium for COSL reached 111.03%, ranking it 20th among AH shares in terms of premium rate [1] Listing Information - COSL was publicly listed on the Hong Kong Stock Exchange on November 20, 2002, under the stock code 2883 [1] - The company began trading in the U.S. over-the-counter market as American Depositary Receipts (ADRs) on March 26, 2004, with the stock code CHOLY [1] - COSL's A-shares were listed on the Shanghai Stock Exchange on September 28, 2007, under the stock code 601808 [1]

香港交易及結算所有限公司及香港聯合交易所有限公司對本公告的內容概不負責，對其 準確性或完整性亦不發表任何聲明，並明確表示，概不對因本公告全部或任何部分內容 而產生或因倚賴該等內容而引致的任何損失承擔任何責任。 2883 孫維洲 公司秘書 二零二五年八月十四日 - 1 - 中海油田服務股份有限公司（「本公司」）擬於2025年8月26日在香港聯合交易所有限公司網 站(https://www.hkexnews.hk)公佈本公司2025年中期業績公告。為了便於廣大投資者更全 面深入地了解本公司2025年中期業績和經營情況，本公司擬於2025年8月27日（星期三） 10:00-11:00召開業績說明會（「本次業績說明會」），就投資者普遍關心的問題進行交流。 本公司董事長兼首席執行官趙順強先生，副總裁兼公司秘書孫維洲先生，首席財務官郄 佶先生及一名獨立非執行董事將出席本次業績說明會（如有特殊情況，參會人員可能調 整）。 本次業績說明會召開後，本公司將通過本公司網站(https://www.cosl.com.cn)「投資者關係」 專欄分享本次業績說明會的有關資料，向投資者介紹本次業績說明會的有關情況。 承董事會命 本次業績 ...

Group 1 - The Shanghai Composite Index rose by 0.48% to close at 3683.46 points, while the Hang Seng Index increased by 2.58% to 25613.67 points [1] - China Oilfield Services Limited (COSL) has an AH premium of 112.57%, ranking 19th among AH stocks in terms of premium rate [1] - COSL's A-shares closed at 14.01 yuan, remaining flat, while its H-shares closed at 7.21 Hong Kong dollars, up by 0.14% [1] Group 2 - COSL is recognized as a large-scale integrated oilfield service provider globally, offering services across all stages of offshore oil and gas exploration, development, and production [1] - The company's business is divided into four main categories: geophysical exploration services, drilling services, oilfield technical services, and marine services [1] - COSL was publicly listed on the Hong Kong Stock Exchange on November 20, 2002, and began trading on the Shanghai Stock Exchange on September 28, 2007 [1]

Company Overview - China Oilfield Services Limited (COSL) is a major integrated oilfield service provider globally, offering services across all stages of offshore oil and gas exploration, development, and production [1] - COSL's business is divided into four main categories: geophysical exploration services, drilling services, oilfield technical services, and marine services [1] Stock Performance - On August 12, the Shanghai Composite Index rose by 0.5%, closing at 3665.92 points, while the Hang Seng Index increased by 0.25%, closing at 24969.68 points [1] - COSL's A-shares closed at 14.01 yuan, with an increase of 0.79%, while its H-shares closed at 7.2 Hong Kong dollars, up by 1.84% [1] A/H Share Premium - COSL's A/H share premium reached 112.43%, ranking it 22nd among A/H shares in terms of premium rate [1][2]

Group 1 - The Shanghai Composite Index rose by 0.34% to close at 3647.55 points, while the Hang Seng Index increased by 0.19% to 24906.81 points [1] - China Oilfield Services Limited (COSL) has an AH premium of 114.89%, ranking 21st among AH shares [1] - COSL's A-shares closed at 13.9 yuan, down 0.79%, and H-shares closed at 7.07 HKD, down 0.28% [1] Group 2 - COSL is a major integrated oilfield service provider globally, offering services across all stages of offshore oil and gas exploration, development, and production [1] - The company's business is divided into four main categories: geophysical exploration services, drilling services, oilfield technical services, and marine services [1] - COSL was publicly listed on the Hong Kong Stock Exchange on November 20, 2002, and has been trading in the U.S. OTC market since March 26, 2004, and on the Shanghai Stock Exchange since September 28, 2007 [1]

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