钻孔密封,borehole sealing
1)borehole sealing钻孔密封
1.Based on fluid mechanics and the Newton law of friction,a model ofborehole sealing mechanism is established.以流体力学、牛顿摩擦定律等为基础,建立了钻孔密封机理模型,得出了钻孔周边缝隙流体流动及泄漏量计算公式,分析了提高钻孔密封效果的影响因素。
英文短句/例句
1.Borehole sealing mechanism and a new technology for coal seam gas pressure test:a research钻孔密封机理及新型煤层瓦斯压力测定技术研究
2.Experimental Investigation of Three-phase Foam Sealing Liquid for Gas Pressure Determination Borehole测压钻孔三相泡沫密封液的试验研究
3."at no time should hole be made in top of control panel, unless proper sealing devices are utilized. "除非采用适当的密封设施,否则绝对不要在控制面板上钻孔。
4.A Study of the Second Hole Sealing Method to Improve Gas Drainage in Coal Seams煤层瓦斯抽放钻孔的二次封孔方法研究
5.All sponge rubber packing for watertight doors need to be renewed.所有水密门的多孔橡皮密封垫换新。
6.The new-type mono-metal floating seal for roller bit牙轮钻头用新型单金属浮动密封研究
7.Influence of Dimple Diameter on Dynamic Performance of Gas Multi-pored Face Mechanical Seal气体多孔端面机械密封孔径尺寸对密封动态性能影响研究
8.Penetration Mechanism of DTH Percussion Compact Drilling and Experimental Research on Compact Bit;潜孔锤冲击挤密钻进机理及挤密钻头的设计与实验研究
9.closed cell elastomeric insulation密封微孔泡沫橡塑隔热材料
10.closed cell polyethylene foam backer rod密封微孔聚乙烯泡沫垫棒
11.Numerical Analyses of Gas Lubricated Laser Surface Textured Mechanical Seals激光加工多孔端面气体密封数值分析
12.Numerical analysis on flow field in mechanical seal with porous seal ring face多孔端面机械密封内流场的数值分析
13.TEST STUDY OF A NEW TYPE NON-SEAL SLIDING BEARING CONE BIT新型非密封滑动轴承牙轮钻头的试验研究
14.Study on performance relationship between drilling rig speed and oil seal钻机转速与配油套密封性能关系的研究
15.Research Progress of the Surface Strengthening Technology on Roller Bit Metal Face Seal牙轮钻头金属端面密封表面强化技术研究进展
16.Analysis on sealing failure of myriameter drilling mud pump plunger and improvement measures万米钻井泥浆泵柱塞密封失效分析及改进
17.Effect of Drilling Fluid Density on Neutron Porosity in Underbalanced Drilling欠平衡钻井条件下钻井液的密度对中子孔隙度测井的影响
18.Model Experiment of Gas Permeability Distribution Rule around Dense Boreholes密集钻孔周围透气性分布规律的模型实验
相关短句/例句
undealed borehole未封钻孔
3)dense boreholes密集钻孔
1.The pre-drainage technology withdense boreholes is a preventive measure for the coal and gas outburst.密集钻孔预抽瓦斯技术是一种防止煤与瓦斯突出的措施,钻孔在煤层中所形成的应力分布、透气性规律和瓦斯的流动过程是极其复杂的问题,本文主要采用实验室试验和数值试验进行了系统研究,即采用平面应变模型,揭示密集钻孔的透气性、应力分布、塑性区和卸压区的范围、煤层瓦斯压力变化、预抽半径和钻孔瓦斯流量等问题。
4)precision drilling精密钻孔
5)micro-pore mechanical seal多孔密封
6)seal bore密封孔
延伸阅读
导弹射击密集度导弹射击密集度missile firing dispersiondaodan sheli miiidu导弹射击密集度(missir。firing disper-sion)导弹炸点对散布中心的聚集程度。它与导弹射击准确度构成导弹命中精度。衡量射击密集度的尺度是炸点偏差的均方根偏差或方差。在导弹射击系统偏差很小时，导弹射击密集度近似反映导弹命中精度。在实际使用中，导弹射击密集度通常以圆概率偏差(CEP)或概率偏差表示。导弹射击密集度的大小取决于制导方法、导弹及其制导仪表的制造、射击诸元准备和操作，以及飞行中其他一些偶然因素干扰引起的随机偏差。为提高导弹射击密集度，需完善制导方法，提高导弹的制造精度、射击诸元准备和操作手操作的准确度，减少偶然因素的干扰，缩小各种随机偏差等。对射程较远的弹道导弹，在弹道主动段、中段和末段均进行制导，可使射击密集度(圆概率偏差)达几百米，几十米或更小。(康景良)
