据了解，这项发明专利用于修井作业通井机噪声治理中隔声量分析，在车门系统的动态密封开发过程 中，实现快速评估不同密封条断面动态变形及隔声量计算，建立密封条不同断面的动态变形及隔声量数 据库。该方法可以对车门隔声优化实现更好的支持，处理模型简单，实现高效计算。 本报11月27日讯(大众新闻记者顾松通讯员王巧玲)近日，胜利油田技术检测中心职评中心申报的"一种 车门密封条动态变形及隔声量分析方法"获国家发明专利授权。 ...

证券日报网讯海油发展11月27日在互动平台回答投资者提问时表示，天津院水质检测预制试剂是专为水 质快速分析而设计的粉状化学试剂，采用精确配比的固体反应组分封装工艺。其核心优势在于可快速准 确检测水质情况，仅需按既定程序加入水样即可完成显色反应，解决了关键试剂在复杂水体中稳定性 差、显色干扰度高等技术瓶颈。公司相关的重大事项请关注在指定信息披露媒体上披露的公告。 （文章来源：证券日报） ...

证券之星消息，11月27日油服工程板块较上一交易日上涨0.07%，仁智股份领涨。当日上证指数报收于 3875.26，上涨0.29%。深证成指报收于12875.19，下跌0.25%。油服工程板块个股涨跌见下表： | 代码 | 名称 | 收盘价 | 涨跌幅 | 成交量(手) | 成交额(元) | | | --- | --- | --- | --- | --- | --- | --- | | 002629 | 仁智股份 | 8.33 | 5.04% | 24.23万 | | 1.9867 | | 600968 | 海油发展 | 3.73 | 0.54% | 24.16万 | | 8990.22万 | | 603609 | 中曼石油 | 23.27 | 0.52% | 8.17万 | | 1.91亿 | | 600339 | 中油工程 | 3.35 | 0.30% | P 29.47万 | | 9864.07万 | | 002554 | 惠博音 | 3.48 | 0.29% | 30.07万 | | 1.05亿 | | 600583 | 海滩工程 | 5.39 | 0.19% | 26.32万 | | 1.42亿 | ...

Core Insights - The oil service engineering sector experienced a decline of 1.87% on November 18, with PetroChina Oilfield Services leading the drop [1] - The Shanghai Composite Index closed at 3939.81, down 0.81%, while the Shenzhen Component Index closed at 13080.49, down 0.92% [1] Stock Performance - Zhongman Petroleum (603619) closed at 24.93, up 3.40% with a trading volume of 204,600 shares and a transaction value of 508 million yuan [1] - Potential Energy (300191) closed at 20.71, up 0.05% with a trading volume of 85,200 shares and a transaction value of 176 million yuan [1] - Other notable declines include PetroChina Oilfield Services (600871) down 4.26% and Tongyuan Petroleum (300164) down 3.73% [2] Capital Flow - The oil service engineering sector saw a net outflow of 136 million yuan from institutional investors, while retail investors had a net inflow of 184 million yuan [2] - Major stocks like Zhongman Petroleum and Renji Co. experienced mixed capital flows, with Zhongman Petroleum seeing a net inflow of 33.83 million yuan from institutional investors [3]

Core Viewpoint - CNOOC Development's stock price has experienced a decline, with a current trading price of 3.89 CNY per share and a market capitalization of 39.542 billion CNY, reflecting a year-to-date drop of 5.93% [1] Financial Performance - For the period from January to September 2025, CNOOC Development reported a revenue of 33.947 billion CNY, representing a year-on-year growth of 0.81%, and a net profit attributable to shareholders of 2.853 billion CNY, which is a 6.11% increase compared to the previous year [2] Shareholder Information - As of September 30, 2025, the number of shareholders for CNOOC Development increased by 10.86% to 74,000, while the average circulating shares per person decreased by 9.79% to 137,449 shares [2] - CNOOC Development has distributed a total of 4.747 billion CNY in dividends since its A-share listing, with 3.354 billion CNY distributed over the past three years [3] Institutional Holdings - As of September 30, 2025, Hong Kong Central Clearing Limited is the second-largest circulating shareholder with 100 million shares, a decrease of 5.92672 million shares from the previous period [3] - The Southern CSI 500 ETF ranks as the fifth-largest circulating shareholder with 29.432 million shares, down by 685,100 shares compared to the last period [3]

Core Viewpoint - The oil service engineering sector experienced a slight decline of 0.21% on November 17, with Keli Co., Ltd. leading the losses. The Shanghai Composite Index closed at 3972.03, down 0.46%, while the Shenzhen Component Index closed at 13202.0, down 0.11% [1]. Group 1: Market Performance - The oil service engineering sector's performance was mixed, with individual stocks showing varied results. For instance, Huibo Yin increased by 2.88% to close at 3.93, while Keli Co., Ltd. fell by 2.41% to 34.07 [1][2]. - The trading volume for Huibo Yin was 724,400 shares, with a transaction value of 282 million yuan, while Keli Co., Ltd. had a trading volume of 21,000 shares and a transaction value of 71.71 million yuan [1][2]. Group 2: Capital Flow - The oil service engineering sector saw a net outflow of 65.79 million yuan from institutional investors, while retail investors contributed a net inflow of 4.12 million yuan [2]. - Among individual stocks, Tongyuan Petroleum had a net inflow of 17.68 million yuan from institutional investors, while Keli Co., Ltd. experienced a net outflow of 8.81 million yuan [3].

Market Overview - The oil service engineering sector increased by 0.22% on November 14, with Renji Co., Ltd. leading the gains [1] - The Shanghai Composite Index closed at 3990.49, down 0.97%, while the Shenzhen Component Index closed at 13216.03, down 1.93% [1] Stock Performance - Renji Co., Ltd. (002629) closed at 9.74, up 7.27% with a trading volume of 538,100 shares and a transaction value of 524 million yuan [1] - Zhongman Petroleum (603619) closed at 23.78, up 6.54% with a trading volume of 238,600 shares and a transaction value of 565 million yuan [1] - Other notable performers include: - Zhun Oil Co. (002207) up 3.76% to 9.10 [1] - Tongyuan Petroleum (300164) up 3.06% to 6.39 [1] - Beiken Energy (002828) up 2.98% to 12.43 [1] Fund Flow Analysis - The oil service engineering sector experienced a net outflow of 141 million yuan from institutional investors, while retail investors saw a net inflow of 182 million yuan [2] - The detailed fund flow for selected stocks includes: - Zhun Oil Co. (002207) with a net inflow of 39.78 million yuan from institutional investors [3] - Tongyuan Petroleum (300164) with a net inflow of 16.10 million yuan from institutional investors [3] - Renji Co., Ltd. (002629) with a net inflow of 13.17 million yuan from institutional investors [3] Individual Stock Fund Flow - Notable net outflows from institutional investors include: - Zhong Oil Engineering (600339) with a net outflow of 26.02 million yuan [3] - Huibo Yin (002554) with a net outflow of 11.94 million yuan [3] - Retail investors showed significant inflows in several stocks, including: - Zhong Oil Engineering (600339) with a net inflow of 28.63 million yuan [3] - Huibo Yin (002554) with a net inflow of 18.89 million yuan [3]

Market Overview - The Shanghai Composite Index rose by 0.73% on November 13, with 27 out of 28 sectors experiencing gains, led by the power equipment and non-ferrous metals sectors, which increased by 4.31% and 4.01% respectively [1] - The oil and petrochemical sector saw a slight decline of 0.12%, with a net outflow of 579 million yuan in capital [1] Oil and Petrochemical Sector Analysis - Within the oil and petrochemical sector, there are 47 stocks, with 28 rising and 18 falling on the day [1] - The top three stocks with the highest net capital inflow were: - Sinopec Oilfield Service (369.595 million yuan) - Tongkun Co. (337.274 million yuan) - CNOOC Development (153.185 million yuan) [1] - The stocks with the highest net capital outflow included: - CNOOC (1.93 billion yuan) - PetroChina (1.01 billion yuan) - Unification Holdings (629.724 million yuan) [1] Capital Flow Summary - The following table summarizes the capital flow and performance of key stocks in the oil and petrochemical sector: | Code | Name | Daily Change (%) | Turnover Rate (%) | Main Capital Flow (10,000 yuan) | |--------|----------------|------------------|-------------------|----------------------------------| | 600938 | CNOOC | -2.10 | 1.87 | -1932.034 | | 601857 | PetroChina | -0.20 | 0.10 | -1014.741 | | 600506 | Unification | -0.10 | 28.24 | -629.724 | | 600346 | Hengli Petro | -0.15 | 0.33 | -507.347 | | 600583 | CNOOC Engineering | -0.34 | 1.40 | -343.601 | | 300164 | Tongyuan Oil | -2.21 | 22.93 | -276.618 | | 600256 | Guanghui Energy | 0.18 | 1.22 | -232.265 | | 000554 | Taishan Oil | -0.56 | 6.72 | -229.610 | | 002493 | Rongsheng Petro | -0.18 | 0.35 | -221.928 | | 300055 | Wanbangda | 0.12 | 4.43 | -215.356 | | 300191 | Qianeng Hengxin | -1.52 | 4.86 | -211.016 | | 000059 | Huajin Co. | 2.04 | 2.01 | -209.412 | | 002554 | Huibo Co. | -0.26 | 7.61 | -184.245 | | 600759 | Intercontinental Oil | 1.50 | 7.76 | -132.599 | | 603619 | Zhongman Oil | -0.93 | 2.59 | -130.928 | | 600688 | Shanghai Petro | 0.35 | 0.63 | -120.380 | | 002221 | Donghua Energy | 0.24 | 0.67 | -83.914 | | 601808 | CNOOC Service | -1.20 | 0.49 | -83.727 | | 000096 | Guangju Energy | 0.08 | 1.29 | -72.291 | | 600339 | Sinopec Engineering | 0.00 | 1.07 | -72.291 | | 002828 | Beiken Energy | -0.90 | 17.99 | -68.515 | | 002408 | Qixiang Tenda | 1.19 | 0.84 | -60.924 | | 002986 | Yuxin Co. | 0.62 | 0.84 | -46.701 | | 603798 | Compton | -0.23 | 2.13 | -43.220 | | 000968 | Blue Flame Holdings | 0.13 | 1.85 | -38.858 | | 300839 | Bohui Co. | 0.86 | 0.92 | -28.037 | | 000698 | ST Shenhua | 0.77 | 1.19 | -23.339 | | 603353 | Heshun Oil | 4.21 | 3.98 | -17.913 | | 600800 | Bohai Chemical | 2.21 | 2.17 | -8.393 [1]

Group 1 - The stock price of CNOOC Development fell by 2.22% on November 13, trading at 3.97 yuan per share with a total market capitalization of 40.355 billion yuan [1] - The company has seen a year-to-date stock price decline of 3.99%, with a slight increase of 0.51% over the last five trading days [1] - CNOOC Development's main business segments include energy logistics services (51.51% of revenue), energy technology services (35.37%), and low-carbon environmental and digital services (17.13%) [1] Group 2 - As of September 30, the number of shareholders for CNOOC Development increased by 10.86% to 74,000, while the average circulating shares per person decreased by 9.79% to 137,449 shares [2] - For the period from January to September 2025, CNOOC Development reported a revenue of 33.947 billion yuan, reflecting a year-on-year growth of 0.81%, and a net profit attributable to shareholders of 2.853 billion yuan, up 6.11% year-on-year [2] Group 3 - Since its A-share listing, CNOOC Development has distributed a total of 4.747 billion yuan in dividends, with 3.354 billion yuan distributed over the past three years [3] - As of September 30, 2025, the second-largest circulating shareholder is Hong Kong Central Clearing Limited, holding 100 million shares, a decrease of 5.92672 million shares from the previous period [3]

Core Insights - The oil service engineering sector experienced a significant increase of 3.13% on November 12, with PetroChina Oilfield Services leading the gains [1] - The Shanghai Composite Index closed at 4000.14, down 0.07%, while the Shenzhen Component Index closed at 13240.62, down 0.36% [1] Stock Performance - PetroChina Oilfield Services (code: 600871) saw a closing price of 2.59, with a rise of 10.21% and a trading volume of 3.855 million shares, amounting to 969 million yuan [1] - Other notable performers included: - Zhunyou Co. (code: 002207) with a closing price of 9.01, up 10.01% [1] - Tongyuan Petroleum (code: 300164) with a closing price of 6.34, up 5.32% [1] - Huibo Yin (code: 002554) with a closing price of 3.84, up 5.21% [1] Capital Flow - The oil service engineering sector saw a net inflow of 599 million yuan from main funds, while retail investors experienced a net outflow of 415 million yuan [1] - Detailed capital flow for key stocks includes: - PetroChina Oilfield Services with a net inflow of 2.39 billion yuan from main funds [2] - Zhunyou Co. with a net inflow of 1.14 billion yuan from main funds [2] - Huibo Yin with a net inflow of 69.96 million yuan from main funds [2]