外钓岛-册子岛水平定向钻穿越施工技术研究

外钓岛-册子岛水平定向钻穿越工程穿越曲线超长，地质条件极为复杂，施工难度前所未有。通过对穿越工程特点及施工难点的分析，考虑到实际施工中的技术要求和工程要求，采取了先进的技术措施，实现了外钓岛-册子岛长距离、复杂地层的海底管道穿越，为国内外同类条件的水平定向钻穿越施工积累了宝贵的经验。     

水平定向钻穿越施工中的定向控制技术

本文主要简介水平定向钻定向控制系统功能及系统组成，定向控制的工作原理，为保证定向钻穿越项目的成功，结合管道穿越曲线和定向控制系统来设计定向钻穿越施工控向曲线，通过控向曲线来测定定向参数，为保证控向精度需要设置人工磁场及如何进行纠正计算。     

鉴江定向钻穿越工程施工技术浅析

大型定向钻穿越施工技术是利用导航仪的导向作用,使钻机上的导向钻头沿着设计轨迹钻进,完成导向孔的施工,再利用反拉扩孔的施工方法将工作管道铺设在设计位置的一种非开挖管道敷设的施工技术.本文叙述了定向钻穿越的施工方法、优缺点以及在穿越鉴江施工过程中遇到的问题,其中取得的经验和教训对今后采用定向钻施工技术具有借鉴作用.     

世界最长距离的定向钻穿越施工技术

采用水平定向钻技术，将直径为457mm、长度为2323．33m的输油管道在岩石层穿过长江。尚属首次。文章介绍了仪长线九江长江定向钻穿越工程的地质条件，控向、泥浆、司钻及钻进工艺的施工难点，通过采取相应的措施及改进定向钻穿越施工技术和工艺，最终顺利完成了该项穿越工程，为在复杂地质区域超长距离水平定向钻穿越施工开辟了新的思路。     

世界最长的输油管道穿越工程在江西九江开工

由中国石化集团管道储运公司穿越分公司承担施工的、世界最长的输油管道定向钻穿越长江工程不久前在九江市金鸡坡油库附近开工。据施工单位介绍，该工程是仪征到长岭原油管道工程的一部分，定向钻穿越2316m，穿越江底最深达60m。现已完成光缆通道定向钻穿越长江工程2316m，紧接着又进入原油管道的长江穿越施工。     

某工程定向钻穿越河流施工事故及处理

本文介绍某工程大型河流运用定向钻穿越4次事故的基本情况，就4次定向钻事故进行了详细分析，介绍了处理事故的办法，提出了大型河流定向钻穿越注意事项。     

涩宁兰复线黄河水平定向钻穿越施工技术

涩宁兰复线黄河穿越工程于2009年1月13日回拖成功，创造了国内大型河流、山体、铁路三连穿的先河，在国内大型河流定向钻穿越中率先尝试了断裂带地质、破碎岩层的穿越，穿越深度达到84米，在国内外定向钻穿越工程中实属罕见。     

西部管道工程水平定向钻穿越施工

西部原油成品油管道工程主要包括鄯善一兰州原油管道和乌鲁木齐一兰州成品油管道工程。管线起于新疆乌鲁木齐市和鄯善县，止于甘肃省兰州市，乌鲁木齐至部善线路长度约300km，鄯善至兰州线路长度约为1550km。其中共有3大定向钻工程，黄河定向钻穿越、仁寿山定向钻穿越和301泵房定向钻穿越，工程量分别为：     

ZT-TG500型推管机在哈尔滨松花江定向钻穿越中的应用

本文结合非开挖定向钻穿越施工案例,简略介绍了推管机为定向钻机提供的辅助回拖力的过程,定向钻穿越的施工工艺,钻进方法以及注意事项。此次工程由于推管机的使用,使得长距离定向钻穿越更有保障,顺利完成了管线的回拖作业。     

磨刀门水道水平定向钻穿越施工技术

磨刀门水道水平定向钻穿越工程于2008年1月13日7：00回拖成功，创造了新的水平定向钻穿越长度世界纪录（2630米），继钱塘江穿越工程之后，采用世界先进导向孔对接技术再次获得巨大成功。     

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     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

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     

2014 second batch of rare earth quota released

正~~     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586