分形理论在刀具磨损研究中的应用

提出了基于分形理论的刀具磨损研究新方法，从理论、实验、计算３个方面讨论了刀具主后刀面磨损的分形特征与分形结构，以分形维数作为特征量，在物理意义层次上初步揭示了切削速度与刀具磨损分形结构之间的映射关系。     

全漏失深孔螺杆钻具失速的探讨及解决途径

分析了全漏失深孔中螺杆钻具失速的机理，提出在人上端加调压调环是解决问题的途径，对调压环进行了设计计算，并在实际中应用，有效地解决了深９００ｍ左右干孔条件下钻具失速的问题。     

沿煤层定向钻进技术的研究

首次在煤矿井下使用组合钻具，螺杆钻具和绳钻钻具，调整钻进工艺参数，成功地解决了沿煤层定向钻进工艺的技术难题，在中厚缓倾斜煤层中沿煤层定向钻进，总进尺２２１３．５６ｍ，最大孔深达３０２ｍ，取得了明显的经济效益。     

The shoreline preservation index as a relative-age dating tool for late pleistocene shorelines: An example from the bonneville basin,U.S.A.

This paper evaluates the utility of the shoreline preservation index (s.p.i.) for estimating the age of late Pleistocene palaeolake shorelines, the relative influence of various factors on shoreline preservation, and whether shoreline preservation varies significantly with shoreline aspect. Sampled shorelines from the 3300 km² study area, which includes the Skull, Tule and Puddle Valley portions of the Lake Bonneville basin, range in age from approximately 26 to 12 ka. Their total s.p.i. values range from 23 to 69 per cent, average 46 per cent, and do not vary significantly with shoreline aspect. The data from Skull and Tule Valleys, where studied shorelines are of known age, are analysed first in order to determine if there are statistically significant associations between variables representing shoreline preservation, age, degree of geomorphic development and duration of subaerial exposure. Pairwise correlation is then repeated using observations from all three valleys in order to determine how data from the Puddle Valley shorelines, whose hypothesized ages are not supported by radiocarbon analyses, affect the results. Results show that s.p.i. is useful as a relative-age dating tool, that the postulated ages of the Puddle Valley shorelines are ordinally correct, and that geomorphic development is not an important influence on the preservation of these late Pleistocene shorelines. The relative importance of shoreline age and the relative unimportance of duration of subaerial exposure with respect to shoreline preservation suggest that subaqueous processes play a more substantial role in shoreline obliteration than is generally suggested.     

实用避雷地网工程的实施与改进技术

海省琼北地区为我国雷击高发生区，野外测试仪器设备的安全保护问题极为重要。根据琼北遥测台网建台布局要求及台网子台所处的地理位置，气候环境等特点，自行设计了适应子遥测子台的避雷地网工程。实施中改进了地极的埋设和减阻剂的使用方法。大大降低了地极的接地电阻率。用此项改进技术实施的其它几个避雷地网工程，均达到和超过设计指标－接地电阻值小于４Ω。     

电磁波测井的混合波模型

本文提出一种混合波模型,用电偶极子和磁偶极子等效裂缝天线,兼顾了以往各种理论模型的优点.对胜利油田的电磁波测井（EPT）资料,分别用混合波模型和平面波模型求解得到的介电常数代入各种解释模型,计算储层的含水饱和度,再与实际岩芯测量建立的关系相比较,证明混合波理论模型更合理,解释结果更接近实际.     

Assessment of abrasive wear resistance potential in rock excavation machinery

Conclusions It is apparent that there is no single index that can provide a comprehensive measure of abrasiveness of rock material, but the range of tests described in the paper can provide an assessment of the overall abrasiveness of rock in conjunction with other physical properties. However, it is necessary to devise specific tests to suit a particular mode of excavation taking all these factors into account. Some subjective judgement is also necessary. These investigations can prevent costly mistakes in equipment selection and possibly assist in identifying alternative excavation systems.     

孔内事故的预防与处理

钻探施工经常发生诸如埋钻、烧钻、卡钻、夹钻、掉钻等事故，而导致发生各种事故的原因却多种多样，因此根据事故的具体情况，应选择不同的处理方式。对于较常见的事故采用捞、提、扫、冲、顶等办法来解决，对一些复杂事故，可使用反、透、扩、钻、剥、偏等方式处理。钻井中的卡钻、埋钻、烧钻等事故应以预防为主。     

吸附卡钻的预防与处理

吸附卡钻事故与钻井液关系最为密切。实践证明，在大多数情况下，吸附卡钻是可以预防的：即调节好钻进液性能、降低泥饼的粘滞系数，减少钻具与井壁的接触面积。     

深孔勘察中强自然造斜地层的防斜纠斜工艺技术措施

在强自然造斜地层的深孔勘察施工中，孔斜问题一直是影响钻孔质量和勘察成果质量的重要因素。以穿越恒山山脉铁路隧道深孔勘察为例，介绍了在自然造斜严重的片麻岩地层中采用有效钻孔防斜措施和螺杆钻具纠斜方法，保证了勘察钻孔的质量。