共查询到17条相似文献，搜索用时 187 毫秒
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在定向钻进中,为实现有效的轨迹控制,国内外相关科研院所开发了无磁螺杆钻具。对无磁螺杆钻具的工作原理及特点进行了简单介绍,并对国内外2种无磁螺杆钻具进行了性能测试试验,比较国内外无磁螺杆钻具的性能差异,进一步掌握无磁螺杆钻具的性能特点,为做好现场应用及选型提供依据。 相似文献
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本文重要介绍了转盘(顶驱)+螺杆钻具复合钻进工艺在干热岩钻井中的应用。为进一步提高干热岩钻井施工效率和减少孔内事故,在青海共和干热岩GR1井进行了转盘+螺杆钻具复合钻进应用,根据现场高温井况下螺杆钻具的工作特性,改进优选了螺杆钻具的耐高温橡胶和转子定子的配合间隙,是螺杆钻具复合钻进工艺在深孔高温干热岩钻孔(孔深3705m,孔底温度236℃)施工的首次成功尝试,并取得了良好效果,经受住了硬岩和高温的考验,为进一步改进螺杆钻具在高温井况下的应用提供了宝贵的现场施工经验,也将为我国干热岩科学钻探与深部地热资源勘探提供新的技术支撑。 相似文献
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陈宝义 《吉林大学学报(地球科学版)》1997,(2)
螺杆马达与潜孔锤同属孔底动力机，复合起来难度较大。通过时钻具参数匹配、钻具的连接方式及水功率的消耗等问题的分析，对复合钻具研究的理论方法进行了探讨，提出了适合于科学钻探的复合钻具的两种模式。为进一步研究奠定了基础 相似文献
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在分析了PDC钻头特性及破岩机理的基础上,结合螺杆钻具和PDC钻头在鄂尔多斯工区定向井中的应用,总结了螺杆钻具使用时的注意事项,并介绍了螺杆钻具和PDC钻头组合在鄂尔多斯工区定向井中的应用效果。 相似文献
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陈宝义 《长春地质学院学报》1997,27(2):212-216
螺杆马达与潜孔锤同属孔底动力机，复合起来难度较大，通过对钻具参数匹配、钻具的连接方式及水功率的消耗等问题的分析，对复合钻具研究的理论方法进行了探讨，提出了适合于科学钻探的复合钻具的两各模式，为进一步研究奠定了基础。 相似文献
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南极大陆冰下基岩岩心对研究南极大陆地质构造及成因具有重要意义,目前尚没有任何一个国家在南极内陆成功钻取冰下基岩样品,研制可快速钻至冰岩界面并完成基岩采样的钻进设备迫在眉睫。针对极地冰下基岩取样技术难题,提出了一种可结合热水钻系统使用的采用热水驱动的冰下基岩取心钻具概念设计。该钻具系统采用常规热水钻完成南极大陆上覆冰层钻进,然后更换热水取心钻具穿过已有钻孔快速到达冰岩界面,完成冰下沉积物和基岩取心钻进,大大缩短基岩取心时间,提高钻进效率。结合中国自主研发的热水钻系统参数,对螺杆马达压力损失和输出扭矩进行理论计算,提出了螺杆马达选择依据。该技术有望在未来极地冰下基岩取心钻进中发挥重要作用。 相似文献
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为了提高煤矿井下硬岩定向钻进效率,在分析硬岩定向钻进螺杆马达要求的基础上,选择了4种不同类型的螺杆马达在陕西韩城桑树坪煤矿进行井下硬岩定向钻进试验。试验结果表明,四级7︰8头螺杆马达和五级5︰6头螺杆马达在定向钻进硬岩时,其平均机械钻速分别为2.52 m/h和2.15 m/h,累计纯钻进使用时间可达550 h。这2种类型的螺杆马达表现出长寿命、高效率等特点,适合于定向钻进硬岩地层。 相似文献
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Predicting the performance of a tunneling boring machine is vitally important to avoid any possible accidents during tunneling boring.The prediction is not straightforward due to the uncertain geological conditions and the complex rock-machine interactions.Based on the big data obtained from the 72.1 km long tunnel in the Yin-Song Diversion Project in China,this study developed a machine learning model to predict the TBM performance in a real-time manner.The total thrust and the cutterhead torque during a stable period in a boring cycle was predicted in advance by using the machine-returned parameters in the rising period.A long short-term memory model was developed and its accuracy was evaluated.The results show that the variation in the total thrust and cutterhead torque with various geological conditions can be well reflected by the proposed model.This real-time predication shows superior performance than the classical theoretical model in which only a single value can be obtained based on the single measurement of the rock properties.To improve the accuracy of the model a filtering process was proposed.Results indicate that filtering the unnecessary parameters can enhance both the accuracy and the computational efficiency.Finally,the data deficiency was discussed by assuming a parameter was missing.It is found that the missing of a key parameter can significantly reduce the accuracy of the model,while the supplement of a parameter that highly-correlated with the missing one can improve the prediction. 相似文献
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有效的产品数据和设计过程管理是煤矿井下坑道钻机数字化开发的保障。结合企业批量定制的生产模式和钻机产品的变型开发特点,定义了钻机的产品数据管理需求;建立了钻机产品数据管理的各项功能模型,包括项目管理、文档管理、流程管理、BOM管理、零部件管理、组织权限管理和系统集成;给出钻机产品数据管理系统的总体结构、系统组成和拓扑构型,并采用Team Center Express软件予以实现。最后,结合ZDY6000L产品数据实例对该系统的有效性予以说明和验证,并予以了系统实现。 相似文献
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中国大陆科学钻探CCSD-1井钻井液流变模式的选择与循环压力降 总被引：2，自引：1，他引：2
针对CCSD－1进的钻进方法、井身结构和泥浆体系，通过2000m取心钻进的实施情况和采集的钻井液性能检测数据，采用数理统计和回归分析的方法，优选了卡森流变模式，计算CCSD－1井不同井深的循环压降。结合现场的生产实际，分别测定了螺杆马达、液动潜孔锤和双管取心钻具的循环压降，最后，确定了钻井液循环通道的各部分的压力分布。 相似文献
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《Journal of South American Earth Sciences》2010,29(4):345-359
The Plutón Diorítico Moat (Moat Dioritic Pluton, PDM) is the largest of several isolated Cretaceous plutons exposed in the Fuegian Andes of Argentina. It is made of a large variety of rock types ranging from ultramafic bodies (pyroxenites and hornblendites) to syenites. The petrological diversity is thought to have been originated by fractional crystallization of a mantle-derived magma combined with minor assimilation of continental crust (AFC). Its geochemical characteristics indicate a mildly-alkaline monzonitic affinity, contrasting with the typical calc-alkaline plutons of the Southern Patagonian Batholith (PB) to the south, in the Chilean archipelago. The PDM original magma is arc-related and its crystallization, as indicated by the Rb–Sr mineral isochron age of 115 ± 3 Ma, is coeval with some plutons of the PB. Therefore a similar tectonic regime is assumed for the emplacement of these plutonic bodies, both south and north of the Beagle channel. Differences in magma sources and degree of partial melting are inferred to account for the contrasting lithological and geochemical characteristics of the PB and PDM. The data suggest that the original magmas of the PDM were generated at greater depths in the mantle, by a smaller degree of partial melting, compared with the PB. The Barros Arana basalts, exposed to the north in Chile, forming a back-arc volcanic complex, display the same mildly-alkaline shoshonitic affinity, and are considered in this study as the volcanic equivalents of the PDM. All the plutons in the Argentinean Fuegian Andes display similar lithological and geochemical characteristics and are, therefore, grouped in this work under the name of Magmatismo Potásico Fueguino (Fuegian Potassic Magmatism). 相似文献