堵漏纤维水泥浆体系在塔河油田的应用研究

塔河油田十区、十二区及艾丁区块是中石化西北油田分公司的主力上产区块,该区块井深且多含有二叠系易漏地层,固井不同阶段发生漏失严重影响了固井质量。针对这一问题,从提高水泥浆的堵漏能力方面入手进行了研究,使用了一种高强有机聚合物单丝短纤维,将其加至水泥浆中可以提高水泥浆的堵漏效果。室内研究表明,堵漏纤维性能稳定,与水泥、外加剂以及水泥浆中各种外掺料有很好的相容性,将不同尺寸的堵漏纤维合理搭配加至水泥浆后有较高的承压能力,固井时能有效的起到堵漏作用。将研究成果进行了多井次的现场应用,水泥浆中加入堵漏纤维后有效防止或降低了固井时发生漏失,提高了固井质量。     

灵台南南川河井田地层漏失堵漏方法的应用实践

在煤田钻探生产中,堵漏是很重要的一个环节.根据灵台南南川河井田的地质特征,结合各个钻孔的孔内状况对漏失地层做深入地分析,处理漏失时有的放矢,选择正确的堵漏工艺流程.     

水泥-粘土浆液护壁堵漏工艺研究及其工程应用

钻探工程中钻孔漏失常用纯水泥浆液进行堵漏,而针对矿区复杂地层钻进,漏失严重,易垮孔卡钻,为防止漏失及井内事故发生,必须使用高效的水泥堵漏浆液及合理的堵漏工艺。以道真新民铝土矿区为例,对水泥-粘土浆液护壁堵漏工艺进行研究,分析了水泥浆液中加入膨润土、水玻璃、减水剂后性能的变化规律,得出水泥堵漏浆液的优化配方。实际工程应用中取得了良好效果,大大提高了钻进效率。     

新型堵漏工具——拦截式堵漏工具的研究

针对大溶洞或裂缝漏失,利用研究的拦截式堵漏工具将堵漏浆拦截在一定位置,对大裂缝漏失地层、溶洞性漏失地层进行有效封堵,从而解决该类恶性漏失问题,提高钻探施工质量和钻探效率,降低钻探成本,为钻探工程特种漏失堵漏提供新途径。     

下飞管工艺在采空区堵漏维护孔壁中的应用

煤田地质钻探逐步进入深孔施工作业阶段,因此在复杂地层钻进施工的难度越来越大,遇到的新问题也越来越多.特别是遇到采空区、巷道、老窑、破碎带埋藏深度较深的地层,施工中,如果处理不当会造成冲洗液严重漏失、坍塌、掉块等不良后果,严重影响下一步施工.因此,防止冲洗液严重漏失,维护孔壁是预防孔内事故的重要施工工艺之一,介绍了下飞管工艺在采空区堵漏维护孔壁中的应用,可有效提高钻探效率.     

小秦岭深孔岩心钻探水泥浆护壁堵漏技术研究与应用

钻孔的护壁堵漏一直是深孔钻进中的技术难题,在小秦岭深部找矿项目钻探施工中,由于该地区区域地质较为复杂,且构造发育,岩石破碎,钻进过程中孔内经常出现掉块、塌孔、漏失等问题,泥浆堵漏效果不佳,施工中采用水泥浆护壁堵漏达到了良好的效果。本文针对小秦岭深部钻探项目水泥浆护壁堵漏技术的应用,对深孔岩心钻探水泥浆护壁堵漏技术进行分析与总结,提出深孔灌浆堵漏技术对速凝水泥浆性能的要求与施工技术要点,并对该矿区相关钻探施工提供指导与建议。     

汶川地震断裂带科学钻探项目WFSD-2孔防漏固井技术研究与应用

汶川地震断裂带科学钻探项目二号孔(WFSD-2)钻探施工过程中,地层破碎,坍塌、掉块严重,钻进过程中发生多次井漏。为防止固井过程中发生漏失影响固井质量,采用低密度防漏水泥浆常规单级固井工艺。经过多次水泥浆性能试验,调配出了既具有良好流动性、又具有触变性的低密度纤维防漏水泥浆配方。该低密度纤维防漏水泥浆体系在WFSD-2孔168.3 mm套管固井中施工顺利,应用效果良好。     

山丹马场长山子矿区复杂地层综合钻探技术

对于煤田钻探中遇到的第四系巨厚卵砾石层松散、坍塌、掉块、漏失,煤系地层构造复杂、裂隙发育、漏失严重,部分层段岩石致密坚硬、复杂难钻、效率低下等复杂地层问题,需要应用综合钻探技术进行施工。通过对不同地层采用不同钻进、护壁堵漏方法及施工技术措施的阐述,提出了几种可以提高钻效、降低成本的方法。     

若尔盖铀矿勘探钻孔堵漏技术研究与应用

在若尔盖铀矿区由于受地质构造的影响,钻孔漏失成为阻碍钻探效率的最大因素之一。针对矿区地层漏失特点对漏失强度进行了初步划分,根据不同漏失强度和漏失特点研究了堵漏材料,提出了相应堵漏工艺,大大增加了堵漏材料和堵漏措施的针对性和实用性,有效地提高了矿区钻孔堵漏成功率。     

某井田煤田钻孔漏失原因分析

以某井田煤田地质勘探钻孔中出现的各种冲洗液漏失现象为出发点,结合地层、构造特征,系统分析并揭示了地层与构造原因、钻探工艺不当及泥浆配制、性能与漏失地层间不匹配是导致钻孔漏失的主要原因.     

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     

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     

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     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。