水平定向钻孔稳定性因素分析

非开挖水平定向钻进技术作为非开挖铺管的主要方法,它得到了广泛的应用,但其在施工过程中常常出现钻孔失稳的问题,本文介绍了非开挖水平定向钻孔失稳而破坏的问题,分析了影响钻孔稳定性的地质方面和工程方面的两大方面的因素,最后对维持钻孔稳定的方法和对策提出了作者的建议.     

水平定向钻进技术

非开挖水平定向钻进技术作为非开挖铺管的主要方法,它得到了广泛的应用.介绍了非开挖水平定向钻进技术的技术原理、技术特点、施工工艺和我国水平定向钻进施工面临的问题.     

HDD铺设高密度聚乙烯管在市政管道工程中的应用

定向钻孔牵引高密度聚乙烯管材铺设市政管道是一种新型的非开挖施工方式，该技术具有施工时免开挖，周边环境影响小、管道内壁光滑、耐腐蚀、柔韧性好、使用寿命长等优点。本文介绍了定向钻孔牵引高密度聚乙烯管材在市政管道工程中的一些应用情况。对高密度聚乙烯管管材的选择、定向钻孔牵引管的特点以及施工时需解决的一些问题和该技术的应用前景作了阐述。     

如何选购非开挖水平定向钻机

本文从几个方面介绍了选购非开挖水平定向钻机应注意的问题，这些方面是作者在实践中总结出来的经验和教训。     

用于那布勒斯地铁车站建设的非开挖技术

将非开挖定向钻进技术与钻孔冻结技术结合运用，并且新开发了在钻孔中布设ParaTrackⅡ定位线缆的方法，从而确保了那布勒斯加里波第广场地铁站的掘进施工精度与安全。     

反循环技术在水平定向穿越施工中的应用

本文简略介绍了泥浆反循环工艺的原理,及其反循环工艺在非开挖水平定向穿越施工时,钻孔清渣的过程和应用前景。     

旋转导向系统在水平定向钻进中试验成功

旋转导向系统（RSS）能在钻杆回转状态下改变钻孔倾角和方位角，从而能够在定向钻进中始终保持钻压和钻进效率，这种钻具早已在石油和天然气定向钻进中成功应用，此次在非开挖水平定向钻进中试验成功，显示出其具有广阔的应用前景。     

2008年我国非开挖行业调查与分析

本文结合国内非开挖行业调结的数据和国外的非开挖行业情况，分析总结了我国非开挖行业各个方面的情况，包括：水平定向钻进、顶管、管线修复和替换，分析总结了我国非开挖行业的发展动态和前景，以及存在的问题及应对措施。     

水平钻进横穿公路的定向技术研究

结合水平横穿开封—洛阳高速公路非开挖水平钻进铺设通讯管道工程实例 ,通过对实钻试验数据进行分析 ,得出了水平定向钻进中钻孔轨迹为弧线的规律 ,并推导出钻孔弧段曲率半径以及能保证准确钻孔出口位置的入口仰角的计算公式。总结了水平钻进的技术要点     

非开挖铺设管线施工方法及其设备技术发展趋势

本文分析了国内外水平定向钻和气动冲击锤两种非开挖施工设备的施工方法，对其工作原理、适用的施工范围、各自的优缺点、以及典型施工方法进行了分析，并论述了非开挖设备技术的三个主要发展方向：由于铺设大管径管线施工要求，非开挖设备向大型化发展；水平定向钻机与气动冲击锤组合施工发展，解决复杂地层管线铺设难题；专用设备与知能设备的开发，实现非开挖设备产品的更新换代。     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

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     

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     

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.     

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.     

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     

2014 second batch of rare earth quota released

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