油管输送式射孔技术起爆方式的设计与应用分析

油管输送式射孔技术的起爆方式有很多种,如果起爆方式选择不合理则会导致起爆失败,造成射孔作业返工.针对大佚油田补孔井、常规新井、深井和水平井不同的井况,分析了油管输送式射孔技术压力开孔起爆方式、投棒开孔起爆方式、单向延时压力起爆方式等不同起爆方式的优点和适用范围,优选出了油管输送式射孔起爆方式的规律,提高了油管输送式射孔的一次成功率.     

油层套管在模拟井条件下的射孔试验

1　前言油井射孔是石油开发的关键技术之一 ,是完井作业的重要环节。油层套管的射孔性能是套管质量的重要组成部分 ,直接影响射孔完井的质量和效果 ,决定油井的产量和寿命。由于套管射孔作业是在数千米的井下进行 ,影响因素较多 ,无法进行有效的观察 ,因此到目前为止国际标准化组织和国际石油行业最权威的机构———美国石油协会 (ＡＰＩ)也没有拟定出套管射孔性能的试验方法和评判标准。中国石油行业根据自己几十年的生产实践及研究成果 ,创造出了在模拟井中用无枪身射孔方式来试验套管射孔性能的方法并依此拟定了内部标准[1 ] ,用于评价套…     

复合钢管技术的应用

本文简要介绍了复合钢管在各技术领域的应用,详细叙述了复合钢管的生产工艺,对复合钢管的研究与开发具有一定的指导意义。     

高强高韧性射孔枪管无缝钢管开发

文章介绍了包钢调质生产的高强高韧性射孔枪管,通过钢种设计、热处理工艺试验和实际生产总结了高钢级射孔枪管的开发情况和效果。结果表明,通过合适的热处理工艺后射孔枪管达到了150ksi强度级别,横向冲击韧性好,具备高强高韧的性能。     

油层套管射孔性能的材料判据研究

介绍了油层套管经受射孔操作的过程，射孔对套管的要求，检评套管射孔性能的传统实验方法。提出了用材料性能检评油层套管射孔性能的方法和判据。     

N80套管射孔性能的断裂韧性判据及验证

射孔性能是油层套管很重要的一项指标,它代表着油层套管抵抗裂纹脆性扩展的能力。文章利用射孔开裂分析的断裂力学模型,对模拟射孔后的油层套管进行了分析,建立了能满足射孔性能要求的断裂韧性判据,并通过试验进行了验证。     

复合罐道技术的应用

介绍了矿井复合罐道技术及其在岩金地下矿山的应用情况。采用该技术后 ,即经济 ,又安全而实用。     

高钢级射孔枪管BT150P无缝钢管开发

文章介绍了包钢调质生产的BT150P钢级射孔枪管,通过钢种设计、热处理工艺试验和实际生产总结了高钢级射孔枪管的开发情况和效果。结果表明,通过合适的热处理工艺后射孔枪管达到了150 KSI强度级别,具备高强高韧的性能。     

复合电镀技术及应用的发展趋势

本文主要从复合电镀理论发展、复合电镀参数影响、复合电镀研究应用现状三个方面对复合电镀技术进行了概述,并简要介绍了国内外复合电镀技术发展差距。     

射孔枪用高强高韧无缝钢管开发

石油天然气开采经常需要进行射孔作业,射孔枪管性能及其制造精度的高低对射孔作业质量至关重要.总结了高强度高韧性射孔枪管的开发情况和效果.结果表明,通过改善铸造工艺过程参数,经过后续调质热处理生产后,新开发的射孔枪管达到了155 KSI强度级别的同时,具备优异的冲击韧性,韧脆转变温度低于-20℃.     

斩波内馈调速技术在锅炉引风机上的应用性能分析

高压电动机斩波内馈调速技术与变频调速技术同属于高效率的调速技术。斩波内馈调速技术发展应用时间不长、还远不如高压变频调速技术应用广泛,对于其应用性能还有待于进一步了解。本文针对斩波内馈调速技术在攀枝花钢钒有限公司发电厂4台710 kW锅炉引风机上的应用情况,对比高压变频调速技术性能,重点分析了斩波内馈调速系统的可靠性、节电性能、调速范围与启动特性等,提出了保证斩波内馈调速技术可靠运行的措施,给出了一种高效的有别于高压变频调速节能技术的应用实践案例,为斩波内馈调速应用的推广提供借鉴。     

浅析蓄热式燃烧技术

阐述了蓄热式燃烧技术的关键部件，并分析和讨论了存在的一些问题。     

浅析采矿工程巷道掘进技术与支护技术

传统的"两掘一喷"施工方式无法对矿井进行完全支护,提出一种"多向聚能高效破岩"技术,该技术体系主要表现为:掏槽方式采用复式双楔形以及聚能爆破设备,提高爆破稳定性,控制巷道安全性。在实践中,该技术体系表现出以下优势:爆破炮眼数量减少1/10,爆破炮眼利用率大幅度提升,技术方法表现出突出的经济效益、安全效益。     

Biospecific interaction analysis using biosensor technology

Fundamental information that enhances our understanding of biospecific interactions can be obtained using a new analytical system based on biosensor technology. The functional characteristics of biospecific interaction, such as kinetics, affinity and binding position, are examined by label-free analysis of proteins in free solution binding to an immobilized ligand at a hydrophilic sensor surface.     

Performance analysis of the aluminum casting furnace

The casting furnace plays a central role in the production of aluminum. Its design and operation are complex and involve some 450 parameters. There is a need for a model to predict and analyze its performance. We propose a simplified model in which each main component of the furnace is treated as a 1-D heat conduction medium. Based on the equations of conservation of mass, energy, and chemical species, complemented by the equations of conduction and the Hottel’s formulation of radiative heat transfer, this dynamic model can simulate any sequence of operations such as loading, heating, stirring, skimming … that constitutes a batch, and can take into account other operational details such as the opening of doors. It is validated on a real furnace, then used to predict furnace performance in other modes of operation, and also to determine an optimal fuel flow that minimizes a chosen cost function.     

Performance analysis of the aluminum casting furnace

The casting furnace plays a central role in the production of aluminum. Its design and operation are complex and involve some 450 parameters. There is a need for a model to predict and analyze its performance. We propose a simplified model in which each main component of the furnace is treated as a 1-D heat conduction medium. Based on the equations of conservation of mass, energy, and chemical species, complemented by the equations of conduction and the Hottel’s formulation of radiative heat transfer, this dynamic model can simulate any sequence of operations such as loading, heating, stirring, skimming … that constitutes a batch, and can take into account other operational details such as the opening of doors. It is validated on a real furnace, then used to predict furnace performance in other modes of operation, and also to determine an optimal fuel flow that minimizes a chosen cost function.     

企业节电改造技术分析

分析了我国用电现状,简要归纳了企业在节电改造中的有效途径,分析各种节电技术的特点、节电原理及应用场合.     

A model of cost-outcome analysis for assistive technology

Drosophila provides an excellent model for delineating the role of ion channels in the origin and transmission of heartbeat. We report here tests in Drosophila on a wide range of mutations and pharmacological agents known to interfere with K+, Ca2+, Na+, and Cl- ion channels in well-characterized ways. We find K+ channels are central to heart function. Tetraethylammonium, which blocks all four K+ currents, slowed the heart. We were able to distinguish among these currents. The mutation slowpoke and the agent charybdotoxin, both of which affect a fast Ca(2+)-gated K+ channel, virtually eliminate heartbeat. Shaker and ether-a-go-go, which encode subunits of K+ channels, have moderate, possibly regulatory effects. "OPQ-type" Ca2+ channels are critical. omega-Conotoxin MVIIC, which blocks these channels, virtually stops the heart. Amiloride, which may affect T-type Ca2+ channels, has no effect, nor do the L-type Ca2+ blockers verapamil and diltiazem. temperature induced paralysis E, involved in the function of Na+ channels, the Na+ channel blockers tetrodotoxin and amiloride, and the Cl- blockers mefanamic and niflumic acids have no effect. Na+ and Cl- channels thus appear unnecessary for cardiac function.     

MPM和PQF轧管工艺

连轧管机是生产无缝钢管的高效轧机,限动芯棒连轧管机代表着现代无缝钢管生产的先进技术,MPM和PQF同为限动芯棒连轧管工艺,对此2种连轧管工艺的特点进行了详细的分析.     

衰落信道下能量检测的性能分析

在认知无线电系统中,大部分的无线信道可以表征为NAKAGAMI衰落信道或莱斯衰落信道.针对NAKAGAMI衰落信道和莱斯衰落信道环境下的能量检测,分析了频谱检测虚警概率和漏检概率与信道模型参数之间的关系,比较了单用户检测和多用户合作检测性能,得到了虚警概率和漏检概率数学表达式,为能量检测器的设计提供了性能参考界.数值仿真结果表明,NAKAGAMI信道下,能量检测性能随衰落因子和平均信噪比的增大而改善;莱斯衰落信道下,能量检测性能随平均信噪比的增大而提高;多用户合作检测性能分别比单用户提高1一2个数量级.