Study of a thermal drill head for the exploration of subsurface planetary ice layers

The recently discovered water vapor plumes on Saturn's moon Enceladus, the polar caps of planet Mars and the possible ice volcanism on the Jovian satellites call for suitable techniques to explore deep ice layers of the solar system bodies. This paper presents a novel approach to deliver scientific probes into deeper layers of planetary ice. Several existing locomotion concepts and techniques for such probes are presented. After studying the mathematical framework of the melting locomotion process, melting tests with different head forms were done to evaluate the influence of the head's geometry on the melting process. This work led to a novel concept of a thermal drill head, using heat and mechanical drill in combination to penetrate the ice. We compare the performance of such a hybrid concept versus the melting penetration alone by a mathematical model and tests in ice with a prototype of the melting drill head.     

TesTrack随钻测压工具在XX油田K14井的应用

地层压力测试是测井作业非常重要的环节,在研究地层压力剖面、判断流体性质、划分气、油、水流体界面、估算地层渗透率、预测地层产能等方面发挥着举足轻重的作用。BakerHughes公司的TesTrack随钻测压工具在XX油田首次应用,分析了该工具的特点及其应用效果,对该工具的推广应用具有重要的参考和借鉴意义。     

青岛台体应变短周期气压系数变化原因探讨

青岛台体应变短周期(小于128 min)气压系数2018-01出现阶变，通过对观测系统、台站周边施工情况、监测环境等逐项现场核实，排除观测系统、周边施工的影响。利用离散小波变换和回归分析发现，钻孔水位的气压系数与体应变气压系数同步阶变，结合台站钻孔施工当天体应变钻孔水位变化、体应变趋势变化、其他相邻台站水位气压系数变化等数据认为，台站钻孔施工是导致体应变气压系数变化的原因，并定性分析其变化机理。     

Repacking practice for G-3 engineering driller power unit with drive shaft of dual channel reverse circulation

In order to satisfy operating requirements for constant core drilling technology in reverse circulation with hollow-through DTH,the power unit of G-3 engineering driller was ameliorated. The new one with dual channel drive shaft, achieved the perfect assemble with transmission structure of the original power unit. It could interconvert according to need by using two sets of drive shafts with direct and reverse circulation. The repacked G-3 engineering driller carried on experiment in the field test in Luanchuan molybdenum mine of Henan, whose effect was very good.     

干旱缺水地区深水井泡沫钻进技术研究

依据泡沫的优点 ,提出了在干旱缺水地区采用深水井泡沫钻进技术的钻探新方法。给出了深水井各孔段的成孔工艺 ,重点阐述了深水井泡沫钻探灌注系统的主要设备和泡沫钻进工艺的规程参数 ,并指出采用该技术可解决在干旱缺水地区施工 5 0 0～ 80 0m深水井的问题。     

对黄土地区钻孔和探井试样试验指标的分析评价

通过对济南地区次生黄土所采集的钻孔和探井土样进行浸水试验,并对其主要物理力学指标进行了分析评价,得出探井试样比钻孔试样所具有的试验指标更为真实可靠,因此次生黄土分布区采集探井试样进行湿陷性浸水试验是十分必要的。     

面向2024年后的中国引领的国际大洋钻探计划管理与运行机制思考

历经53年的发展,国际大洋钻探计划从DSDP(Deep-sea Drilling Program)到IODP(International Ocean Discovery Program),在机构设置、运行机制、管理模式等方面积累了丰富的经验,并得到世界各国的认可.长期以来,通过参与并成为该计划的正式成员国,我国在科学研...     

阿拉斯加巴罗AB—67钻孔岩芯的沉积环境分析

巴罗ＡＢ－６７钻孔岩芯的４８个样品被进行了２５个项目的粒度分析和４４个项目的地球化学分析。本文对这些数据进行了Ｑ型因子分析,并得到了４个主因子。研究表明,这４个因子分别代表了沉积环境的四项指标,它们分别为沉积速率,降水,海平面和温度。从岩芯顶部５个样品与巴罗气象台观测记录研究了古温度和古降水的转换函数,从＾２１０Ｐｂ测年和几个环境事件确定了沉积速率的转换函数。     

Hydrologic and geochemical properties of the San Andreas fault at the Stone Canyon well

The Stone Canyon well penetrates 600 m of highly fractured and severely altered quartz diorite intimately associated with the creeping segment of the San Andreas fault of central California. Geophysical logs reveal a complex hydrology dominated by major fractures. Fluid pressure in some fractures is sufficient to prevent invasion of the formation by heavy drilling mud, implying pore pressures at least 10% higher than hydrostatic ones. At least three chemically distinct waters are encountered, including a chloride brine clearly segregated from the shallow, potable groundwater. Chemical alteration of the quartz diorite persists throughout the well, far below the depth where the water-rock reactions responsible for the ubiquitous chlorite and mixed-layer clays can be considered weathering. Whole-rock ¹⁸O analyses indicate significant interaction of the rocks with a low ¹⁸O fluid within some of the fractured and altered zones, whereas a deeper sample shows¹⁸O enrichment. High pore pressures encountered in Stone Canyon may be due to tectonic compression. Measurements of temporal variations in the pore pressure at the well may provide a means of predicting earthquakes along this segment of the San Andreas fault.     

青海省大柴旦滩间山岩金矿区绳索取心钻进工艺技术的应用效果

本文详述了在青海省大柴旦滩间山岩金矿区采用绳索取心钻进的施工技术方法,并自行设计加工制造了常见事故专用处理工具,获得了良好的技术经济指标。