高钢级绳索取心钻杆管材残余应力的初步研究

有观点认为管材的残余应力是绳索取心钻杆非正常损坏的诱因之一。据此采用环切法对不同热处理和矫直工艺的冷拔绳索取心管材制造过程中的残余应力进行了检测比对,认为冷拔管材制造环节产生的残余应力是存在的,也是可控的。只要制造工艺措施得当,可以将高钢级合金管材的残余应力控制在可接受范围内;合格管材出厂时存在较高残余应力造成的钻杆折断等事故较为罕见。应从管材制造、钻杆加工、现场使用等方面入手,努力降低钻杆断裂事故。     

S91绳索取心钻具及其附属工具设备的研制(下)

七、钻杆事故专用工具根据绳索取心钻进的工艺特点（外环间隙小），S91绳索取心钻具所配用的钻杆事故工具只有钻杆公锥一种。公锥的锥度与钻杆螺纹锥度相似，并且长度适当。不论钻杆的断口在何处均能有效地进行捞取。公锥上端车有S87G绳索取心钻杆母螺纹，以便与上部钻杆相联。     

国产绳索取心钻杆设计与制造技术的分析

介绍了国内外绳索取心钻杆的生产现状,论述了绳索取心钻杆的结构、各种管材的性能、钻杆和接头的选材、螺纹的优化设计和一些特殊工序,最后以φ89 mm绳索取心钻杆为例,根据不同的设计方案,列出了相应的技术参数供大家参考。     

绳索取心钻探施工中钻杆折断原因分析及应对措施

通过分析绳索取心钻探施工工况、钻杆折断事故现状及折断部位,探讨绳索取心钻杆折断的原因,提出预防绳索取心钻杆折断措施.     

基于ANSYS绳索取心钻杆和连接接头的应力分析

对绳索取心钻探施工的工况进行了分析,利用ANSYS软件对绳索取心钻杆以及连接接头的应力状态进行了三维模拟,提出了不同工况条件下,钻杆柱最大应力出现的位置。所得的结论对预防钻杆折断事故、优化接头螺纹设计、确定合理钻进参数有一定的参考意义。     

绳索取心钻杆超声波探伤方法分析研究

对绳索取心钻杆断裂的原因进行了分析,对超声波探伤绳索取心钻杆方法进行了研究,对具体探测方法、探测仪器和探伤过程进行了分析。对有效预判绳索取心钻杆断裂、降低孔内事故发生率和减少经济损失具有一定的现实意义。     

绳索取心钻杆的研究试验

一、绳索取心的特点绳索取心又叫不提钻取心。它的最大特点是取心时不需要提升孔内钻杆，而在钻杆内借助专用打捞工具（打捞器）把装满岩心的内管捞取上来获得岩心。绳索取心钻杆除了和普通钻杆一样，在钻进过程中传递和承受拉、压、扭等应力外，还具有如下特点：1．内外平。保证取心钻具在钻杆内顺利通过。2．壁薄。增大内管和钻杆的间隙，减小取心钻具在钻杆内的升降阻力，并且增大岩心直径，减小钻头壁厚。3．绳索取心钻头壁厚（10.5毫米），所需钻进压力较大，因此，应能承受和传递比普通小口径钻杆     

中深斜孔绳索取心高强耐磨钻杆的研究与应用

针对中深斜孔钻进中φ60 mm绳索取心钻杆机械强度低、耐磨性能差、钻杆拧卸难等问题,采用对绳索取心钻杆整体调质处理的方式,大幅提高了绳索取心钻杆的机械强度;对绳索取心钻杆表面高频淬火,提高了钻杆表面的硬度和耐磨性;采用重型绳索取心带切口接手,初步解决了绳索取心钻杆拧卸问题.采用上述钻杆在中深斜孔钻进中取得了较好的效果.     

深孔用高钢级绳索取心钻杆分区热处理工艺试验研究

为改善绳索取心钻杆受力工况,延长钻杆使用寿命,满足深孔及特深孔钻探施工要求,开展了对绳索取心钻杆体进行分区热处理工艺的试验研究。试验选用高钢级薄壁管材,通过对钻杆两端300 mm左右的区间内进行盐浴淬火及高温回火处理,保证了调质区域的机械性能,硬度和金相组织均匀性良好,同时热处理过渡带影响区域小。试制加工的特深孔绳索取心钻杆具有两端部螺纹连接段刚性强、杆体中部韧性好的特点。该钻杆在山东莱州西岭村矿区完成了2845.55 m深孔的钻进施工,使用情况良好。     

苏联ССК绳索取心钻杆使用注意事项

据资料介绍，苏联第11个五年什划，使用CCK-46、CCK-59、CCK-76三种规格绳索取心钻具，其工作量逐年递增。而绳索取心钻杆使用的好坏直接关系到绳索取心钻进工艺所具有的不提钻取心、台效高等优越性的发挥。现将苏联绳索取心钻杆使用时注意事项介绍如下，供参考。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered     

铜熔炼中锍品位对杂质元素分配行为的影响

借助于多相、多成分系统中平衡计算的手段，开发出微量元素砷、锑、铋及伴生元素铅、锌等在铜熔炼中分配行为的计算机模型。利用该模型对铜熔炼过程进行计算机模拟，分析了冰铜品位对砷、锑、铋、铅和锌等杂质元素的分压、活度系数及它们在冰铜、炉渣和气相中分配率的影响，并讨论其热力学分析结果对生产实践的指导意义。     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new