人造金刚石孕镶钻头生产试验介绍

长春科研所研制的人造金刚石孕镶单阶梯尖环、尖环齿型、单阶梯底喷钻头在内蒙扎鲁特旗塔拉营子和黑龙江七台河龙湖区进行了生产性试验,钻头平均寿命为47.98m、134.64m,钻头每米成本为12.16元及4.83元,取得了较好的经济技术效果。     

页岩气储层钻井液损害评价研究

延长油田页岩气储层埋藏较深,地质条件复杂,页理构造发育,岩石物性极差,页岩易膨胀、分散。由于孔缝并存,页岩气储层比砂岩油藏具有更严重的微粒运移损害、储层应力敏感损害、水锁损害等特性。鉴于延长页岩储层太过致密,不能用常规方法进行渗透率测定。通过采用人造裂缝法测定钻井液对储层裂缝的污染程度来表征钻井液对储层的损害率。经人造裂缝法测定,延长油田现场使用的白油基钻井液体系对页岩气储层的污染渗透率恢复率达到91.060%,初步证实该体系具有良好的储层保护效果,可在延长油田进一步推广使用并验证。     

滨海输沙若干测定法及数模计算述评

本文介绍了沙质海岸滨岸输沙的一些测定方法和数模计算的研究现状，并评述其使用条件、方法可靠性的应用前景，为开展海洋泥沙运动和岸滩演变的研究工作提供新思路与借鉴。     

Analytical Solutions to the Flow Field Induced by Uniformly Moving Multiple Helical Vortex Filaments

This paper presents analytic solutions for the flow field of inviscid fluid induced by uniformly and rigidly moving multiple helical vortex filaments in a cylindrical pipe. The relative coordinate system is set on the moving vortex filaments. The analytical solutions of the flow field are obtained on the assumption that the relative velocity field induced is time-independent and helically symmetrical. If the radius of the cylindrical pipe approaches infinity, these solutions are also available for tmbounded space. The results show that both the absolute velocity field and pressure field are periodical in time, and may reduce to time-independent when the helical vortex filaments are immobile or slip along the filaments themselves. Furthermore, the solution of velocity field is reduced to Okulov‘s formula for the case of a single static vortex filament in a cylindrical pipe. The calculated locations of pressure peak and valley on the pipe wall agree with experimental results.     

海南岛澄迈角沙滩潮间带底栖动物生态初步研究

对海南岛海岸澄迈角沙滩的3个断面进行了潮间带生态调查。初步鉴定无脊椎动物32种,其中软体动物8种,甲壳类14种,多毛类8种,其它动物2种。优势的大型底栖动物有端足类的肢突跳钩虾Talorchestia brito,等足类的日本异浪漂水虱Excirolana japonica和双壳类的等边浅蛤Gomphina aequilatera。垂直分布可分为:(1)钩虾带,以肢突跳钩虾为特征种;(2)等足类带,以日本异浪漂水虱为特征种;(3)蛤-螺带,以等边浅蛤-(虫昌)螺Umbonium vestiarium为特征种。研究表明,沙滩底栖动物垂直分布主要受潮汐、底质、盐度和波浪的影响。     

Study on Inclusions in Natural and Synthetic Gems

The characteristics of inclusions in natural and synthetic gems are distinct owing to their different forming mechanisms and can be utilized to distinguish gems from different localities.In addition,intensive studies on inclusion characteristics of natural gems could identify their geographical origins and provide valuable information on gem synthesis,In this paper synthetic gems (synthetic star-spangled sapphire and emerald)and natural gems from various locations including natural sapphire from Thailand and Australia,and natural aquamerine from Mufushan,Hunan Province,and Ailoshan,Yunnan Province,were selected for the comparative study of inclusion.Significant research results have been achieved,thus providing the important basis for distinguishing natural from synthetic gems.     

人造金刚石孕镶钻头磨损特征的研究

金刚石钻头定每转进尺钻进试验表明：在每转进尺合理范围内，钻头磨损率较低，在此范围外，则较高；并发现钻头多出现内喇叭型不均匀磨损唇面。本文从理论上解释了金刚石钻头出现这种磨损唇面的原因：即内侧金刚石切深、受力及每周碎岩体积较大；并据此探讨了包括镶钻头在内的金刚石镶嵌措施，以使唇面均匀磨损。     

分离并回收合成片中人造金刚石和触媒金属的方法及装置

设计钛阳极篮和钛阴极板组成电解装置，取代了传统的盐酸电解法中以玻璃钢篮加石墨铜棒的阳极装置和以铁板作阴极板的阴极装置，并将盐酸电解波改变为以硫酸镍为主盐的酸性电解液，在一定的工艺条件下，电解速度提高了三倍，同时可在阴极上回收纯度较高的镍钴合金板，阳极上回收二氧化锰。镍钴金属回收率达90％～94％，纯度在97％～99％。电流效率达66％～85％，电解时无有害气体及废水排放。