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