共查询到15条相似文献,搜索用时 80 毫秒
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近年来,金刚石绳索取心钻进方法得到了迅速的发展,但由于绳索取心钻杆螺纹损坏后的再加工(简称二次加工)问题未能及时跟上,给绳索取心钻进工艺的推广应用带来了困难。 相似文献
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螺纹粘结式绳索取心钻杆,在管体两端都加工圆锥外螺纹,再用粘结剂粘结钻杆公接头和母接头,钻杆管材是正火状态,所以它的机械强度比经调质处理 相似文献
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绳索取心钻杆内壁结垢,是指泥浆中的固相物质(粘土颗粒、岩粉、未溶解的处理剂等)以及其它固体微粒在钻杆内壁上的沉积物。当钻杆结垢超过一定厚度时,直接影响打捞器下放和内管提升工作。不仅降低钻进效率,同时增加上、下钻具辅助时间,大大加重工人的体力劳动。当前钻杆结垢是绳索取心难解决问题之一,因此笔者就钻杆结垢原因及防垢、消垢措施谈谈自己的看法和意见。 相似文献
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对绳索取心钻探施工的工况进行了分析,利用ANSYS软件对绳索取心钻杆以及连接接头的应力状态进行了三维模拟,提出了不同工况条件下,钻杆柱最大应力出现的位置。所得的结论对预防钻杆折断事故、优化接头螺纹设计、确定合理钻进参数有一定的参考意义。 相似文献
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本文介绍了高强度绳索取心钻杆接头(简称高强接头)生产试验和扩大试用效果,分析了高强接头比普遍接头综合机械性能好的原因.重点论述了两种接头失效型式、磨损与偏磨和高强接头扩大试用阶段出现的新问题,提出进一步提高高强接头质量的意见,并探讨与总结了接头连接及应用技术问题. 相似文献
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地质特深孔绳索取心钻杆结构区别于API石油钻杆,其机械性能计算不可直接引用API石油钻杆的相关理论公式。针对这一理论依据与计算方法缺失,本文对地质特深孔双台肩钻杆接头进行了受力分析,开展了钻杆接头拉伸载荷与扭转载荷计算理论研究,构建了绳索取心钻杆机械性能计算的理论方法。同时,通过有限元分析和台架试验,确定了H-5000规格双台肩绳索取心钻杆的机械性能,验证了计算方法的准确性,并提出了钻杆结构改进建议与下一步研究方向,为高性能薄壁绳索取心钻杆“服役”于5000 m地质岩心钻探工程提供了技术支撑。 相似文献
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The influencing factors for liquid phase catalytic oxidation of mine gas to methanol (in form of CHaCOOCH3) are studied using the self-established experimental apparatus. The results show that CH3COOCH3 (target product) is obtained by using CH3COOH as reaction solvent, and the yield of target product increases with the increasing of reaction temperature, gas pressure and reaction time. In the mine gas-Pd(OAc)2-CHaCOOH system, the yield of CHaCOOCH3 increases with the increasing of addition of Pd(OAc)2 which is redox catalyst for mine gas conversion. The yield of CH3COOCH3 will be greatly improved by composite additional oxidant which is obtained by equimolar mix of p-benzoquinone with NO2. 相似文献
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HyLogger-3, a visible to shortwave and thermal infrared reflectance spectrometer system for drill core logging: functional description 总被引:1,自引:0,他引:1
M. C. Schodlok L. Whitbourn J. Huntington P. Mason A. Green M. Berman 《Australian Journal of Earth Sciences》2016,63(8):929-940
Australian Geological Surveys are the custodians of a major national asset in the form of historically drilled and archived drill cores of the top few kilometres of the continent acquired by government agencies and companies over many decades. The AuScope National Virtual Core Library (NVCL) component of the AuScope Earth Model comprises geological/rock samples, technology, people and database/delivery infrastructure located in six nationally distributed nodes and is aimed at extracting additional value from this asset. The technology components of the NVCL comprise an integrated suite of hardware (HyLogger-3) and software (TSG-Core) systems for the imaging and hyperspectral characterisation of drill cores in their original core trays and the interpretation of their contained oxide, carbonate, hydrous and anhydrous silicate mineralogy. The HyLogger-3 includes state-of-the-art Fourier Transform Spectrometers that continuously measure calibrated spectral reflectance from nominal 10 by 18 mm fields of view. These spectra are in turn passed through a series of automatic and semi-automatic pre-processing and mineralogical unmixing algorithms. These, along with numerous other tools in TSG-Core, output a variety of mineralogical and image products for use by scientists in many branches of the earth sciences. This paper provides a functional overview of the HyLogging hardware and software tools available in each of Australia's Geological Surveys. 相似文献