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- INVESTIGATION OF THE REASONABLE TIME INTERVAL FOR LONG HOLE MILLISECOND BLASTING OF TUNG ANSHAN IRON MINE 东鞍山铁矿深孔爆破合理微差间隔时间的研究
- OPTIMIZATION OF MEDIUM DEPTH HOLES MILLISECOND BLASTING PARAMETERS IN AN OPEN-WORK 中深孔微差爆破参数优化在某露天矿开采中的应用
- To increase lump coal ratio in stopes, a scheme is put forward for coal falling by loose pre-shearing millisecond blasting, and hole arrangement parameters and blasting parameters are adjusted. 为提高炮采面块煤率,提出了松动预裂微差爆破的落煤方案,并对布孔参数和爆破参数进行了调整。
- By use of deep-hole millisecond blasting technique, four larg e-volume bridge piers under complicated circumstances were successfully demolished. 用深孔微差爆破技术成功地拆除了复杂环境下的四个大体积桥墩。
- Oil and Gas Reservoir Model for Multiplayer Channeling and Dynamic Monitor Down Hole Pressure. 多层窜流油气藏模型及井底压力动态
- The millisecond blasting method with long-delay out-of-hole and short-delay in-hole detonators and one-through initiation was ado pted in blasting design. 设计采用孔内高段延期雷管、孔外低段延期雷管一次引爆的微差爆破。
- Successful application of the deep-hole millisecond blasting with double-bench smooth blasting is a development to deep-hole blasting technologies for open pits. 双台阶光爆的深孔微差爆破的成功应用，是露天深孔爆破技术的一项发展。
- Oriented case overshot for sidetrack drilling tech is a main component in down hole work-over operation. 定向套管开窗侧钻技术已成为井下大修作业的重要组成部分。
- MDT sampling is a new type of down hole PVT oil and gas sampling method during DST. MDT取样是在中途测试阶段进行的一种新型井下PVT油气取样方法。
- The natural conditions and order of the millisecond blasting are introduced.The arrangement ways of the millisecond pipes are expounded.It has made good result in practice. 介绍了炮采工作面毫秒爆破的自然条件和起爆顺序,详细阐述了毫秒管的布置方式,在实践中收到了良好的效果。
- All drilling tubulars and down hole tools, including drill pipe, drill collars. Subs, crossovers, fishing tools. etc. 所有的钻井管柱和井下工具,包括钻杆钻铤、接头、配合接头和打捞工具等。
- In millisecond blast engineering,the key to achieving initiative control of vibration damages by means of wave interference is to ascertain reasonable delay time interval. 在微差爆破工程中,用干扰降震法实现爆破震动灾害主动控制的关键在于确定合理的微差延期时间。
- A lot of lab study and test have been done to the problems of bad reliability and short life-span for traditional slip-type down hole chock. 针对传统卡瓦式井下节流器的“圆柱”式胶简存在可靠性差、寿命短的问题,进行了大量的室内研究实验。
- To the problems occurring at using down hole mechanical sample n oil and gas wells, aptitude microelectronic high pressure sample has been studied. 针对油气井井下机械取样器在使用过程中出现的问题,研究开发出了智能型微电子高压物性取样器。
- Information transmission between ground and down hole is the of key the closed-loop control system of wellbore trajectory. 地面与井下的信息传输是井眼轨道自动闭环控制的核心。
- According to lab model experiment and theory analysis,the rational delay intervalof millisecond blasting used in rock drift excavating was acquired and a new type of long millise-cond delay detonator was researched and manufactured. 根据实验室模型试验和理论分析得出岩石巷道掘进微差爆破合理延迟间隔时间，据此研制出新型长延迟毫秒雷管。
- The down hole decentralized gas anchor is a kind of gas separator, the intake ports of which are located on the inner wall of the casing. 偏心气锚是指在弓形弹簧的作用下,将气锚的吸入口置于套管内壁附近的一种油气分离装置。
- Based on the character of short-time non-stationary random signal, the feature of energy distribution of multi-interval-time in millisecond blast signals was investigated by means of the wavelet packet method. 摘要根据爆破振动信号具有短时非平稳的特点，利用小波包分析技术对满足分析要求的多段微差爆破振动信号的能量分布特征进行研究。
- This paper presents a instrument which can diagnoses the down hole failure with computer system,and describes the design of its construction and applications. 这里介绍了一种采用计算机系统对井下故障进行诊断的仪器，叙述了仪器的设计结构和应用效果。
- Abstract:Through an engineering practice, the application of SDDC (Super Down Hole Dynamic Compaction) on consolidating the mixed backfilling and high backfilling it introduced. [摘要]通过工程实例,介绍了孔内深层强夯技术在加固杂填土和高填方土中的应用。
