查询词典 drilling

The seventh chapter is conclusions and prospects, sums up the innovative ideas and research findings of the paper, puts emphasis on the new drilling tools and new technology of water-saving rotary percussion drilling, which has important environmental value, convenient, and easy to be popularized, at the same time, imperfections existed in study process of the paper were pointed out, and some suggestions were offered for further research.

第七章、结论与展望，总结了全文的主要创新与研究成果，强调了节水型回转冲击钻进新机具及其新工艺不仅简便实用、易于推广，而且具有重要的环境价值，同时也指出了课题研究过程中存在的不足之处，对进一步的研究工作提出了一些建议。

Elevator is used for hoisting drilling tool, pulling tube or percussion drilling.

升降机为提升钻具、起拔套管或进行冲击钻进用。

percussion drilling ; rotary drilling ; jars ; performance ; parameter ; penetration rate

因此，冲击器是冲击旋转钻井中的核心工具，它的性能优劣决定了冲击旋

The present invention is one multifunctional electric hammer with the functions of percussion, percussion drilling, drilling, etc. and aims at facilitates the operation of multifunctional electric hammer. The improved multifunctional electric hammer includes front end parts and back end parts.

本发明涉及具有锤、锤钻、钻等功能的多功能电锤，解决的是现有的多功能电锤两个旋钮组合操作多功能的转换，操作不方便和其传动轴沿轴向来回窜动损坏前端壳体的问题。

The percussion drilling method was named as "Father of Petroleum Drilling in the World" and became another great invention, next to the Four Great Inventions of Ancient China.

两千载井盐历史、八百年彩灯文化、亿万年恐龙遗迹、三百年川菜源流，展示着世界最古老的井矿盐都市、中国最厚重的盐文化遗存风彩。

The paper discussed the main technical points of bedrock drilling, the design and selection of back reamers for different formations and drilling diameters, detailed construction technology of bedrock with typical engineering cases in China and prospected the future development.

论述了非开挖基岩钻进的技术要点及在不同地层、不同管径施工条件下对非开挖回扩钻头的设计及选用。结合国内几个典型的施工实例，详细阐述了非开挖基岩钻进的施工工艺。展望了该技术的发展前景。

The HWDP's uses AISI 4145H alloy structural steel, the technique of production exactly carries on the SY/T5146-1997 standard, HWDP is one kind of medium weight and the drill pipe similar drilling tool, its wall thickness is thicker than the drill pipe, is thinner than the drill collar, on its thick wall body connected special and lengthen drilling joint.

整体加重钻杆的原材料用钢是AISI 4145H合金结构钢，生产工艺严格执行SY/T5146-1997标准，加重钻杆是一种中等重量和钻杆类似的钻具，其壁厚比钻杆大，比钻铤小，其厚壁管体上连接有特别加长的钻杆接头。

Be living in the deep well ultradeep well prospecting process ,Since radial direction force 、Eddy is stird 、Elements such as horizontal vibration and so on being ,In the wake of well drilling time the increase ,The auger post writings is used the casing inside wall crossrange strenuously to broaden ,It is more and more grave to cause casing and drilling rig to join the wornout problem .

论文摘要：在深井超深井勘探过程中，由于径向力、涡动、横向振动等因素的存在，随着钻井时间的增长，钻柱作用于套管内壁的侧向力增大，导致套管和钻具接头磨损的问题越来越严重。造成钻具耐磨带失效的主要原因有地层研磨性、钻杆的井下工况、耐磨材料选择与

The result shows that the drainage of surface drilling well reduces the gas concentration of outtake air in working face to a great degree and the drainage effect is restricted by factors of coal seam and location of surface drilling well.

研究结果表明：地面钻井抽采将很大程度上减小工作面回风流的瓦斯含量，且抽采效果受到煤层条件和钻井位置的制约。

Automatic punching bending machine; full-gear transmission Desk / li drilling; automatic cutting table / li drilling; automatic profiling gas cutting machine; high

青海华鼎实业股份有限公司番禺石楼机械厂拥有固定资产3560万元，占地29488平方米，厂房面积14500平方米，加工机床150多台，员工280多人，产值5000万元。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。