双管井口回接技术

双管井口回接一直是双管井大修作业中的难点,在渤海地区部分双管井的油管挂内部扣型不清楚,其本身的结构也没有详细的资料供查阅分析,针对这种井口回接作业目前还没有成熟的经验可以借鉴。本文主要结合BZ34-4-3井现场井口回接作业,介绍了此类双管井口回接所需的工具、回接技术、双管油管挂拆卸方法以及回接时的注意事项。这一套井口回接技术很大程度上降低了双管井井口回接的风险,为下步作业打下了良好的基础,同时双管井口的高效回接也缩短了工期,节省了成本。在未来的双管井修机作业具有实用的借鉴意义。     

海上油田解卡工艺技术研究

管柱阻卡是海上油田在钻井、完井及修井作业时常发生的井下事故。针对海上油田作业时管柱遇到不同的阻卡类型,分析了多种管柱阻卡类型的特点,给出了相应的预防措施,并针对阻卡类型,给出了处理解卡事故时所遵循的解卡原则以及不同的解卡方式,这对海上油田处理解卡事故具有一定的指导意义。     

闽江水口水电站工程概述

(一) 前言国家重点建设项目之一的福建闽江水口水电站,是我国使用世界银行部分贷款、实行国际竞争性招标进行建设的大型能源工程,也是我国第一座由中外联营公司承包施工的水利电力工程。这项工程的初步设计于1980年通过审查;1985年经国家批准立项,并开始前期准备工程施工:1986年初,由有关方面专家组成的世     

基于智能制造环境下的装备制造业产业升级研究

制造行业对提升国家的经济效益,增强国家的硬实力等占据着重要位置。我国在进入到21世纪后,先进的智能化技术和智能设备等应用到装备制造业中,弥补了传统装备制造业效能低、成本高、信息化不足的问题。因此,智能制造已经成为装备制造业产业升级的主要发展趋势。文章站在智能制造环境的角度下对装备制造业转型升级逻辑理路进行了全面的剖析,从基础设施的完善、技术的完善、国家政策的支持、互联网的联合应用等,构建了全新的智能制造环境下装备制造业产生升级的创新路径和策略体系。     

矿井杂散电流的产生、危害及防治

矿井杂散电流是危害矿井安全生产的主要因素之一，分析了解杂散电流产生的原因，准确把握杂散电流在井下的分布规律，采取必要的预防和治理措施，对于保证煤矿的安全生产来说是十分重要的．     

海上油田防砂管柱打捞关键技术

现有的防砂管柱打捞技术对割点位置、井斜和钻具组合对切割作业的影响考虑较少。从打捞防砂管柱的关键环节切割和套铣入手,确定了水力机械切割点位置,对切割时刀片受力进行了计算,并对切割影响因素进行了分析,阐明了套铣防砂管柱的关键技术。研究表明:井斜小于12°,应适当增加钻铤数量来提高钻具旋转稳定性;井斜在12°~55°之间,应减小切割压力、增加钻铤数量、延长切割时间来保障切割作业;井斜大于55°,选择减小切割压力、减少钻铤数量、增加扶正器或者减扭器来提高切割成功率。应用该技术在渤海油田辽东、渤南、渤西区块共进行60余井次防砂管柱打捞作业,大幅度提高了防砂管柱打捞效率和大修作业时效。     

常规打捞工具在双管井中的应用

双管井内双管生产管柱的打捞以及双管封隔器的套铣打捞一直是修井作业的难点。通过全面查找BZ34-4WP-3井井史资料,分析井下情况,筛选打捞工具,制定详细的工艺流程,对现场作业参数灵活掌握,在渤海油田首次使用铣鞋、卡瓦打捞筒等常规打捞工具成功打捞出双管管柱及双管封隔器,延长了油井的寿命,为以后双管井的修井作业提供了宝贵的...     

电力GIS中多层次智能故障诊断技术的研究

GIS因其强大的数据和空间分析功能，已被广泛应用于电力系统的各个方面。随着配网规模不断扩大，其运行方式变得更复杂，采用传统的、单一的故障诊断方法已不能满足实际系统的需要。本文提出一种分布式多层次智能故障诊断方法，它依据配电设备的类型进行故障诊断任务的分解，对分解后的子系统在多层智能推理策略的控制下按系统结构层次进行协同故障诊断，将最终的诊断结果在AM／FM／GIS中实时、动态地显示出来。该方法在大型复杂的配电系统中应用效果特别显著。     

河北省中南部农田孢粉组合特征

The study on 82 surface soil pollen samples from different types of cultivated vegetations in central and southern parts of Hebei Province indicates that the pollen assem-blages from farmlands in the plain have not only their own plant types, but also the pollen components from the nearby mountains. Arboreal pollen percentages and concentrations (dominated by Pinus)from farmlands in mountain area are higher than those in the plain, and it reduces gradually with the increasing distance away from the mountains. Taking Pinus pollen in Taihang Mountains as an example, its content is 20%-30%, 10%-20%, 20%-30% and below 16% respectively for the samples from the area of 0-50, 50-100, 100-150 and more than 150 km away from the east Taihang Mountains. The increase of Pinus pollen proportion in the central plain is probably related to the fohn effect. The spatial variation of AP from mountains to the plain in Hebei Province may be similar to the forests clearance by human activities in the early historical period. Shrubby pollen proportion is small both in mountains and in the plain, but their major components are different. Elaeagnaceae, Corylus,Ostryopsis and Oleaceae are common in mountain areas, while there are relatively high contents of Rosaceae and Vitaceae in the plain. Herbs content in the plain(about 60%)is 15% higher than that in mountains, among which the Cereals and Cruciferae pollen per-centages are 5% and 2% higher respectively. Artemisia pollen percentage in the plain is lower than that in mountains. Since the human activities are weaker in mountains compared with that in the plain, the general trend is that Chenopodiaceae pollen increases from mountains to the plain gradually, reflecting the raising intensity of human activities. The fern spores of Se-laginella sinensis in mountains are higher than that in the plain, but it still reaches to about 7% in the plain. The fern spores of Selaginella sinensis are not prone to be spread by wind, in-dicating that those in the surface soil of the plain may be carried by river water from moun-tains during the deposition of the plain.     

电力GIS中多层次故障智能诊断技术

分布式多层次智能故障诊断方法,其依据配电设备的类型进行故障诊断任务分解,对分解后的子系统在多层智能推理策略的控制下按系统结构层次进行协同故障诊断,将最终的诊断结果在AM/FM/GIS中实时、动态地显示出来.