抽油杆打捞筒维修改进与应用

抽油机井长期运行过程中抽油杆承载各种负荷大,抽油杆经常发生疲劳断脱,油井一般通过作业打捞替换断脱的抽油杆恢愎正常生产。打捞时使用的工具名称打捞筒,本文要点阐述打捞作业过程中使用的打捞工具改进与应用。     

封隔器胶筒和保护伞落井打捞处理方法研究

由于井况或封隔器自身原因,在作业施工过程中,起管柱时容易使封隔器胶筒及保护伞被刮掉落入井内。在作业施工打捞井内封隔器胶筒及保护伞时,所采取的一系列作业处理方式,和防止封隔器胶筒及保护伞在作业施工中被刮掉所采取的防护措施,使油水井得到恢复正常生产。     

打捞技术在石油工程中的应用探讨

介绍了石油在不断的开采过程中,随着时间的推移,常常会出现结垢、结蜡、套变等现象,导致需要解卡打捞以确保开采的顺利进行,通过对近年来解卡打捞施工技术的不断积累和总结,对提高石油企业大修解卡打捞施工具有十分重要的现实意义。     

套铣打捞筒研制与应用

一、技术背景和需要解决的关键技术问题 1．技术背景 随着油田的开采,油水井出砂越来越严重,造成生产管柱被砂埋井越来越多,给油水井大修作业带来了很大的难度。为此,常规的大修作业在解决砂埋的处理上只能采用先套洗后打捞的办法,才能完成打捞,但是,对于出砂严重的井,采取常规的先套铣后打捞的办法成功率非常低。由于从套铣后,再下打捞管柱打捞的时间段内,井里出砂又将管柱埋上;套铣打捞法成功的解决了常规套洗打捞法在时间不够用的问题,对于严重出砂的井,有效的解决了没等出砂就完成了打捞。     

井筒疑难节流器打捞工艺研究及应用

针对苏里格气田井筒疑难节流器打捞存在问题,提出相对应技术方案.通过内捞式打捞工具、环形强磁节流器打捞工具、可脱钩捞矛打捞工具、注剂筒及润滑降阻打捞及连续油管套铣工艺等,解决了苏里格气田井下节流器不完整、上提下砸不动、井筒复杂等井筒疑难节流器打捞问题,在井下节流器打捞作业中发挥了重要的作用.     

水平井磨铣打捞技术研究与应用

随着科技的发展,石油的开采技术直接影响着企业的效益,利用水平井开采油气藏的技术获得了日益广泛的应用。本文主要首先从水平井的一些相关知识入手,再对水平井的磨铣打捞技术进行分析,最后又介绍了水平井的磨铣打捞应用的一些基本工具。     

水平井磨铣打捞技术研究与应用

随着科技的发展,石油的开采技术直接影响着企业的效益,利用水平井开采油气藏的技术获得了日益广泛的应用。本文主要首先从水平井的一些相关知识入手,再对水平井的磨铣打捞技术进行分析,最后又介绍了水平井的磨铣打捞应用的一些基本工具。     

塔里木油田超深斜井电潜泵打捞工艺研究及应用

塔里木油田目前生产的各区块油井产量高,同时大部分井都采用深井电泵生产。在生产多年后油层出现各种各样的问题,地层出砂、出水、套管破损导致电泵被卡落井,冲砂困难等问题。塔里木油田油井井较深、斜度大,电潜泵外径大、机组结构复杂,电潜泵落井事故数量在逐年增加,修井工作量和难度也逐年增加。为此本论文结合塔里木油田各区块深斜井电泵的实际情况,总结了超深斜井电潜泵打捞的技术难点,同时通过对电潜泵配套打捞工具的分析和现场实际运用,总结出了一套适合塔里木油田深斜井电泵打捞的工艺技术。     

绳类落物打捞工艺技术研究

本文分析了测井仪器及电缆落物的特点、选用打捞工具的原则,结合实例对打捞中应该掌握的技巧、注意事项进行了探讨。     

陶瓷釉浆的触变性及其调控措施

本文简要说明了对釉浆触变性进行调节和控制的重要意义，详细分析了导致釉浆触变性过大的原因，通过试验明确了解决釉浆触变性过大问题可采取的具体措施。     

改性SiC注浆工艺对坯体密度的影响

主要研究了固相含量与粘度、消泡刹和石膏模对亚氨基二乙酸改性SiC料浆注浆成形坯体密度的影响。结果表明,当料浆固相含量较低、粘度较小时,增大固相含量能提高坏体密度;而当固相含量较高、粘度较大时,降低粘度能有效地提高坯体密度。加入适量合适的消泡剂可适当提高坯体的致密性,同时石膏模的成分和膏水比对坯体密度的影响较大。当半水石膏的两种类型的比例（β/α）为5：5、膏水比为1．8：1时,注浆成形坯体密度达最大．为2．5891g／cm3。     

Slip behavior of liquid flow in rough nanochannels

The molecular dynamics simulation is applied to investigate the liquid flow in rough nanochannels with a focus on interfacial velocity slip via three-dimensional Couette flow system. The typical liquid spatial distribution, velocity profile and slip length for liquid flow in rough nanochannels are evaluated and compared with smooth nanochannel. The effects of liquid–solid interaction, surface roughness and shear flow orientation on slip behavior of liquid flow in rough nanochannels are all investigated and discussed. The results indicate that, regardless of whether the liquid flow in transverse or longitudinal flow configuration, the rough surface induces extra energy losses and contributes to the reduction of interfacial velocity in nanochannel when compared with smooth surface. A larger roughness size introduces a more irregular near-wall flow, which results in a smaller interfacial velocity slip. In addition, irrespective of surface condition, increases in liquid–solid interaction strength lead to small interfacial velocity slip and expand the extent of velocity nonlinearity in wall-neighboring region. In particular, the slip behavior of liquid flow in rough nanochannels is also influenced by the shear flow orientation. Interestingly, we find that interfacial velocity slip at the rough solid surface in transverse flow configuration is smaller than that in longitudinal flow configuration.     

Slip behavior in polymethylmethacrylate films in dependence of self-assembled monolayer wettability

The slip behavior of polymethylmethacrylate (PMMA) films prepared on self-assembled monolayers (SAM) supported by Si substrate was investigated according to the wettability of the SAM. To this end, the dewetting of thermally annealed PMMA films was measured varying the surface energies of underlyed SAM. Total surface energy (γ^t) of SAM increased with increasing UV exposure time. At surface energy of <31.3 mJ/m², the PMMA films showed slip behavior; radius of holes (R) ∝ t^0.68−0.72, where t is dewetting time. The slip behavior seems to be dominated by the viscous friction between the PMMA films and the SAM. As t increased, slip behavior disappeared, R ∝ t^0.34−0.39. At surface energy of >42.0 mJ/m², the PMMA films did not show slip behavior, R ∝ t^0.45. It means that interface effects between PMMA films and SAM layers increase with increasing of γ of SAM layers, and then the molecular interaction in the PMMA films increases. The spreading coefficient (S) of the PMMA films approached positive number for UV exposure times between 0 s and 300 s. We concluded that the stability of the PMMA films can be simply controlled by UV-ozone treatment on the SAM layers.     

Slip in Flow through Assemblages of Spherical Particles at Low to Moderate Reynolds Numbers

Effects of slip velocity and volume fraction of slip spheres on the momentum transfer characteristics of assemblages of slip spheres are numerically investigated. The fluid slip along the surface of the sphere is considered by Navier's linear slip model. The dimensionless governing continuity and momentum equations are solved using a semi‐implicit marker and cell method implemented on a staggered grid arrangement in spherical coordinates. The convection and viscous terms of momentum equations are discretized by means of the QUICK scheme and a second‐order central differencing scheme, respectively. The present numerical solver is benchmarked via grid independence and comparisons with the existing literature values. Results were obtained over a wide range of pertinent dimensionless numbers such as the Reynolds number, volume fraction of the dispersed phase, and dimensionless slip parameter.     

国内外水平井技术新进展

水平井在油田开发中发挥着越来越重要的作用。文中分析了水平井的分类、适用油藏条件,总结了国内外分支水平井、大位移水平井、套管钻井、连续油管钻井、以及配套的欠平衡技术、随钻测量（MWD）、随钻测井（LWD）、导向技术等水平井技术的发展状况,指出了中国水平井方面的不足和发展方向。     

提升管循环流化床气,固局部滑落速度的分布

本研究采用光纤激光多普勒测速仪（ＬＤＶ），通过两列信号处理系统，同时测定了气体和颗粒局部速度，研究了低密度循环流化床提升管内局部滑落速度的变化规律。实验结果表明，提高颗粒循环速率，在任一径向位置的气固滑落速度均增加；提高气体表观速度，反而使气固之间局部滑落速度减小。由于固体颗粒在近壁区的团聚行为，在近壁区气、固局部滑落速度出现一个极大值。     

Drying of a Slip Casting for Tableware Product Using Microwave Continuous Belt Dryer

To demonstrate the potential of microwave drying in the ceramic industry, microwave demolding of tableware product by a continuous microwave belt drier has been investigated. This study focuses on the investigation of the effects of the irradiation time, sample size, microwave power and location of magnetron on overall drying kinetics. The results show that microwave drying has several advantages over the conventional method such as shorter processing time, volumetric dissipation of energy throughout a product, high energy efficiency, reduced amount of mold usage, and offering product quality. Further quantitative validation of experimental data could be very useful, especially in providing information for processing high-performance microwave drying for developing the ceramic industry in Thailand.     

Drying of a Slip Casting for Tableware Product Using Microwave Continuous Belt Dryer

To demonstrate the potential of microwave drying in the ceramic industry, microwave demolding of tableware product by a continuous microwave belt drier has been investigated. This study focuses on the investigation of the effects of the irradiation time, sample size, microwave power and location of magnetron on overall drying kinetics. The results show that microwave drying has several advantages over the conventional method such as shorter processing time, volumetric dissipation of energy throughout a product, high energy efficiency, reduced amount of mold usage, and offering product quality. Further quantitative validation of experimental data could be very useful, especially in providing information for processing high-performance microwave drying for developing the ceramic industry in Thailand.     

龙岩土精矿在高石英瓷泥料中的应用

通过用龙岩土精矿取代高石英瓷泥料中的洪山土和部分砂石的试验,不仅改善了高石英瓷泥料性能、提高了制坯合格率,同时也使高石英瓷产品的内外在质量又上了新的台阶。