borehole sealing

Based on fluid mechanics and the Newton law of friction,a model of borehole 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。

The pre-drainage technology with dense 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。

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

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

"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。

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

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。

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

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

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

closed cell elastomeric insulation

密封微孔泡沫橡塑隔热材料

closed cell polyethylene foam backer rod

密封微孔聚乙烯泡沫垫棒

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

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

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

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

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

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

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

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