气举反循环钻进工艺在贵州地热井中的推广应用

结合贵州省地热钻井设备及井身结构等情况,就气举反循环钻进工艺在地热井施工中的应用,对冲洗液正循环和气举反循环两种钻进工艺原理、设备配套、钻具组合、沉没比、钻进参数等进行了分析和总结。气举反循环钻进工艺在地热井施工中的应用效果,证明了该工艺能够提高溶蚀裂隙地层施工效率,减少孔内事故的发生,同时该工艺在热储层中应用还具有明显的洗井效果。     

反井钻机钻进孔内事故预防及处理

采用反井钻机钻进过程中,由于多种原因时常发生孔内事故。论文分析了反井钻井常见孔内事故原因,总结了孔内事故处理方法和预防措施,其经验为今后采用反井钻机钻孔提供了有益的借鉴。     

提高苏里格气田钻井速度的探讨

苏里格大气田属于非均质性极强的致密岩性气田,经济有效开发难度非常大。在钻井过程中,时常发生的井斜、井漏、井塌等事故和不完善的处理技术制约着该地区钻井速度。提高苏里格气田的钻井速度成为低成本高效率开发该气田的重要途径之一。针对钻进过程中容易出现的复杂事故和技术难点,并根据现场钻井实践经验,从PDC钻头优选、分段钻进措施、钻井液调配技术等方面出发,提出了避免钻进复杂事故和克服技术难点的各项技术措施,最终实现提高该地区的钻井速度。     

VLD-1000型定向钻机的孔内事故分析及防范措施

深孔定向钻进技术是区域性瓦斯预抽的关键技术,但在钻进过程中,频繁发生的压钻、掉钻等孔内事故,严重制约了VLD-1000型定向钻机的推广应用.本文结合成庄矿近几年来发生的孔内事故,对VLD-1000型定向钻机的孔内事故原因进行分析,并就预防孔内事故提出一些有效的防范措施.     

青海夏日哈木矿区地层钻进特点与钻探工艺研究

夏日哈木矿区地层复杂,在青海祁漫塔格重点成矿带具有一定的代表性。该矿区地层呈脆性,坚硬并且破碎,部分钻孔钻进过程中存在钻头寿命低、钻进效率低、孔内事故多等问题。针对该矿区地层特点及钻进难点,在总结以往工作经验基础上,对钻头选型及参数选取、钻机选择及时效分析、钻具振动及处理、钻井护壁及堵漏、钻孔结构设计及施工等方面进行分析并提出综合应对技术措施。     

低温泡沫钻进技术在漠河盆地冻土井工程的试验研究

低温泡沫钻进技术除了具有岩心采取率高、钻进效率高和孔内事故少的特点之外,还具有低导热性、低热容量及对钻井孔壁的热干扰小等特点。低温泡沫系统由空压机、泡沫液罐、热交换器、泡沫发生器和参数监测系统组成。通过对泡沫液和空气制冷后,经发泡器混合后可获得低温泡沫。利用低温泡沫作为冲洗介质进行取心钻进,孔内返出的泡沫经消泡后,可再次循环利用。该技术在漠河盆地冻土井工程中进行了应用,经试验数据分析,低温泡沫对冻土层温度的影响极小,岩心采取率高,满足冻土层取心钻进工作的要求。     

煤田地质钻井参数监控系统的设计

设计开发了一种高精度、高可靠性的钻井实时多参数监测控制系统,对钻压、泵量等12个参数直接测量,对参数与派生参数的数学建模与计算,提高目的层采芯率、提前预警可能发生的钻进事故,开发专家系统对钻机运行状态进行有效控制。降低事故发生率,节约钻井成本,提高钻井效率和井队的科学钻井水平。     

XY-8型钻机配套的钻场数字信息采集及传输系统

为提高钻探工作的科学性,实现钻探过程连续监测和孔内异常工况提前预报,将电子技术、计算机技术、通信技术与钻探技术相结合,研发了XY-8型钻机配套的钻场数字信息采集传输系统,实现了钻进参数的采集、处理、储存以及远程传输,实现了孔内异常工况的提前预报,工作人员可通过视频传输远程管理钻探现场。该系统在河南灵宝地区的应用,取得了较好的经济效益。简要介绍了该系统的组成、功能、特点、参数检测原理、系统软件和生产应用效果。     

地质钻探孔内复杂情况和孔内事故种类梳理分析

近年来地质钻探孔内事故数量呈下降态势,但由于技术经济条件变化、地质钻探应用领域和范围扩大,钻孔深度增加,孔内复杂情况增多,一旦发生孔内事故,处理难度变大。应尽快对地质钻探孔内复杂情况和孔内事故种类进行梳理,制定地质钻探孔内事故预防和处理技术规程,推动孔内事故预防处理技术发展和规范化管理。地质钻探孔内复杂情况种类主要有钻孔漏失/涌水、钻孔弯曲、孔内温度异常、钻孔缩径/扩径、钻孔坍塌/阻滞、孔内沉渣、孔内异物和其他孔内异常等;地质钻探孔内事故种类主要有钻具事故、卡钻事故、埋钻事故、烧钻事故、套管事故、测井事故、取心事故和其他事故等。地质钻探与石油天然气钻井有着较大的工艺差异,孔内复杂情况和孔内事故种类亦与石油天然气钻井有所不同,不能完全照搬其种类划分,但应借鉴学习石油天然气钻井行业的井下事故预防处理先进技术和管理理念。     

Excel在定向水平井地层分析及定向跟踪控制中的应用

在定向水平井钻进过程中，由于没有更好地开展钻井地质实时跟踪及缺少超前预测设计控制技术，导致后续施工出现偏差，从而增加钻进成本和钻井施工难度。根据定向钻进设计原理，采用Excel实现定向水平钻进过程中的钻井地质实时跟踪及超前预测设计控制技术，并运用钻井轨迹预测模型，开展了定向水平井钻井地质实时跟踪及超前预测设计控制技术的研究。经实践应用，可有效地提高钻遇率，通过钻井轨迹预测模型，快速预测后续钻进参数，及时指导后续定向及水平井钻进工作，减少工程损失。     

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.     

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.     

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     

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     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

注浆加固技术在十三矿-685 m进风大巷中的应用

针对煤矿开采深度不断向深部延伸，掘进巷道受深部高应力的影响越来越大，巷道围岩整体稳定性差，矿山压力显现越剧烈现象，一般锚网喷加锚索支护无法从根本上控制巷道的变形。总结了平煤股份十三矿-685 m进风大巷注浆加固技术，依据对巷道掘进之后变形监测数据的采集，对巷道变形机理进行分析研究，并对注浆时段进行了合理选择，在对巷道的注浆工艺进行了充分论证的基础上，对巷道进行了注浆。注浆后效果表明:巷道滞后注浆时间段的选择非常重要，巷道在恰当的时间内进行注浆加固施工，能有效控制巷道的变形，巷道注浆后变形量明显减小，岩体的稳定性明显增强，减少了巷道日常维修工作，降低了矿井的生产成本，保障了矿井的安全生产。