共查询到20条相似文献，搜索用时 46 毫秒
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通过时液动冲击器与液压凿岩机的比较，提出了两点看法：（１）液压凿岩机的大液压小流量及高的能量利用系数，对液动冲击器的研制有借鉴作用；（２）水的液体弹簧性质对提高液动冲击器的工作性能具有重要作用。 相似文献
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增大液动射流式冲击器单次冲击功的试验研究 总被引：3，自引：0，他引：3
:试验结果发现 ,当行程加大时 ,获得较高的冲锤末速度 (5 .43m/s) ,单次冲击功 34 6 .45J。当活塞运动所需瞬时流量已大大超过了水泵供水的供给量时 ,冲击器仍能稳定地工作 ,这体现了射流冲击器作为一开放的系统所特有的流量可自动补偿的优点。射流冲击器对负载的适应能力较高 ,且在大行程条件下 ,增加锤重可较大幅度地提高单次冲击功。 相似文献
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液动冲击器的阀程，反映了冲频的高低及冲击功的大小，它必定对时效产生重要影响。但长期以来，人们对此重视不够，致使冲击器的使用效果有时不佳。为弄清阀程对时效的影响，以及阀程和钻进参数的影响，在花岗岩地层进行了对比试验，试验结果表明，阀程对时效的影响不可忽视。试验情况如下。 相似文献
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本文详细介绍了用应力波法测试液动冲击器性能参数的微机系统。该系统根据国际标准设计,具有方法先进,设备简单,采样速度快及计算准确等特点。使用该系统,可以很方便地测量冲击器的能量、频率、流量等重要指标。它提供了研究和改进液动冲击器的有效方法,进一步研究将会得知不同冲击器破碎岩石所需的能量。该系统首次在地质系统应用。 相似文献
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射流元件损坏机理试验研究及分析 总被引：13，自引：0，他引：13
液动射流式冲击器在高压釜内进行模拟试验时发现其工作性能良好，展现了其良好的应用前景。而在石油钻井、大陆科学深钻等深孔钻进中应用液动射流式冲击器发现，射流元件寿命较低。故有必要对其破坏机理进行研究。在实验中采用对比的方法，发现在大泵量情况下射流元件工作室内出现水射流反射及脉冲现象。射流元件破坏主要由脉冲AWJ切割所造成。液动射流式冲击器用于深孔钻进时射流元件有必要对元件尺寸进行改进。 相似文献
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分析了双作用液动贯通式冲击器闭阀加速运动、自由行程和回程各阶段的受力情况，建立了相应的仿真电算数学模型。 相似文献
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介绍了用于大口径钻探的ＤＣ型无簧式双作用液动冲击器的结构和工作原理及设计计算结果，给出了其冲程，上阀程和上阀自由行程，下阀程和下阀自由行程的测量及调整方法。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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正1 Introduction Geological studies established on several sections in Lanping-Simao basin have shown that the salt-bearing strata of Mengyejing formation(Yunlong Fm.in Lanping basin)are constituted by an alternation of salt layers and interbedded facies.The latter consists mainly of mudstones,and mudstone-rich conglomerate.The mineralogy and geochemistry of salt-bearing beds and 相似文献
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正On 22nd April 2014,with the approach of the 45th World Earth Day,China’s Ministry of Land and resources issued the status of China’s mineral resources in 2013.The first task of the prospecting breakthrough strategy action implemented in the last five years has been completed,and China’s security capacity for mineral resources has been significantly improved.In the 相似文献
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正There are more than 700 salt lakes with area of more than 1km2 on the Qinghai-Tibet Plateau of China.In recent years,an oilfield brine was also found in the Nanyishan Section of Qaidam Basin in the Qinghai-Tibet 相似文献
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正1 Introduction Physical and numerical models are constructed to investigate the evolution and mechanism of salt migration driven by tectonic processes.In recent years,we have designed and ran series of models to simulate salt 相似文献
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YUAN Qin LI Jianguo QIN Zhanjie WEI Haicheng SHENG Shurong SHAN Fashou 《《地质学报》英文版》2014,88(Z1):276-276
正The study of Cretaceous-Palaeogene salt-bearing strata of the Khorat Basin Laos and the Lanping-Simao Basin in Yunnan,China has an great significance not only in explaining the basin evolution and the genesis of potash 相似文献
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正Potash is one of the long-term scare deposits in China,and potash prospecting has long been listed as a key brainstorm project for our nation and geological prospecting units.There have been considerable studies in search for potash deposits in the Kuqa depression of the Tarim basin(Jackson et al.,1991;Gemmer et al.,2004;Vendeville,2005;Vendeville and Jackson,1992a,1992b), 相似文献
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正1 Introduction Qaidam Basin in Qinghai,including 43 salt lakes with multiple dominant mineral such as potassium,magnesium,lithium etc.,is the most intensive distribution of Saline 相似文献