BH-VDT5000垂直钻井系统在克深203井的应用

油气井防斜、纠斜问题是钻井过程中普遍存在但一直未能彻底解决的难题之一。经过数年攻关,渤海钻探工程技术研究院研发了BH-VDT5000垂直钻井系统,介绍了垂直钻井系统的结构、工作原理,并对垂直钻井系统在塔里木油田克深203井的现场应用过程、效果进行了对比分析。垂直钻井系统在克深203井用2趟钻完成了二开井段,总进尺1 558 m,正常钻进井段井斜控制在0.5°以内,与同时使用Power-V垂直钻井系统的邻井相比机械钻速提高23%以上。现场应用证明,BH-VDT5000垂直钻井系统在高陡构造地层、逆掩推覆体地层的钻探中,防斜打快效果显著,可进一步推广应用。     

岸线规划在广东省河道管理中的作用

随着经济社会的发展,广东省主要河道河势已发生较大变化,已有的行洪控制线难以适应现状河道管理,为加强省内主要河道的岸线管理,广东省水利厅印发了《广东省主要河道水域岸线保护与利用规划》。通过论述广东省主要河道岸线保护与利用现状、岸线利用存在的主要问题、岸线功能区划,分析河道管理范围与已划定的岸线控制线相互位置关系,并以1座拟建桥梁工程为例,分析涉河建设项目与岸线保护区管理要求的适应性、与岸线控制线管理要求的适应性,通过论证涉河建设项目在岸线管理中的准入条件以及满足管控要求的设计方案,说明了岸线规划在河道管理范围内建设项目防洪评价中的作用,为其他同类型的涉河建设项目提供了论证思路。表明岸线规划对于解决河道开发利用与保护之间的矛盾及对广东省河道管理工作的重要意义。     

Preparation and characterization of mesoporous lithium borosilicate material via the sol–gel process

The lithium borosilicate gels were prepared from the cohydrolysis of the tetraehtylorthosilicate (Si(C₂H₅O)₄) and triethylborate (B(C₂H₅O)₃) by using an ethanolic solution of tetradecyltrimethylammonium bromide (TTAB) as surfactant. The Li⁺ ions were introduced from an acidic solution of lithium carbonate (Li₂CO₃). Depending on the B/Si, Li/Si and TTAB/Si molar ratios at pH equal to 1 and at room temperature, monolithic and transparent colourless gels were obtained. The structure of the gel was investigated by infrared spectroscopy (IR), ²⁹Si, ¹¹B and ⁷Li solid-state magnetic resonance (MAS NMR) and by thermal analysis (DTA–TG). The results show the possibility of obtaining a borosilicate network via B–O–Si bonds in which Li⁺ ions were dispersed. The adsorption–desorption isotherms of the xerogel were characteristic of mesoporous materials. These materials may provide a greater free volume through which conducting ions can move.