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rotary drill tools
相关语句
  旋挖钻具
     Application and Research of Large Diameter Rotary Drill Tools
     大口径旋挖钻具的研究及其应用
短句来源
  相似匹配句对
     THE MICROCOMPUTER CONTROL SYSTEM FOR ROTARY DRILL
     ZWK—Ⅱ型牙轮钻机微机控制系统
短句来源
     Rotary Valve Disk for Drill Pumps
     往复式钻井泵旋转阀盘及其特性分析
短句来源
     Application and Research of Large Diameter Rotary Drill Tools
     大口径旋挖钻具的研究及其应用
短句来源
     Pneumafil Rotary Prefilter
     美国Pneumafil旋转式前道滤尘器
短句来源
     Rotary Flow Desiccators
     旋流干燥器
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-MT series include Mt-P-58, MT-p-73 jet type and MT-2-89 valve type positive impactors. For jet type impactor it moves upward to the upper dead point by pressure difference, resulted from suction effect of fluid passing through the jet and throttling effect of hole between the the valve and the lower end of impactor. And then due to hammer effect and pipeline pressure it strikes the anvil to complete the working cycle. For valve type positive impactor, the valve and impactor are re-set by springs which closes...

-MT series include Mt-P-58, MT-p-73 jet type and MT-2-89 valve type positive impactors. For jet type impactor it moves upward to the upper dead point by pressure difference, resulted from suction effect of fluid passing through the jet and throttling effect of hole between the the valve and the lower end of impactor. And then due to hammer effect and pipeline pressure it strikes the anvil to complete the working cycle. For valve type positive impactor, the valve and impactor are re-set by springs which closes the water circuit. The impactor gets energy from hammer effect and pipeline pressure, and hits the anvil to finish the working cycle. The percussive and rotary drilling laboratory which was set up in the study process can not only measure performance parameters of hydraulic impactor, but also make it possible to study percussive and rotary drill tools and also the drilling method.

介绍了MT系列液动冲击器的工作原理、结构及其特点,还介绍了微机自控液动冲击回转钻进试验室的功能及应用效果等。

The well DK304BC was forced to drill slim hole because its hole cleaning of inclined section and horizontal section is poor ,and sticking is often occured.Based on the practies of this well,the article discusses the harmfulness of unclean inclined section in horizontal well,and analyses the forming mechanism & influencing factors of cuttings bed.After research,analysis and operation,a countermeasure is put forward to solve such cutting bed problems in extended reach well by way of "conventional method...

The well DK304BC was forced to drill slim hole because its hole cleaning of inclined section and horizontal section is poor ,and sticking is often occured.Based on the practies of this well,the article discusses the harmfulness of unclean inclined section in horizontal well,and analyses the forming mechanism & influencing factors of cuttings bed.After research,analysis and operation,a countermeasure is put forward to solve such cutting bed problems in extended reach well by way of "conventional method of removing the cuttings",utilizing steerable rotary drill tool and the drilling slim hole.

从DK30 4BC井斜井段、水平段井眼净化不好 ,造成卡钻直至无法钻进 ,被迫改钻小井眼 ,引伸论述水平井大斜度井段井眼不清洁的危害、岩屑床形成机理及影响因素。通过研究、分析与使用 ,提出对付水平井岩屑床的对策。认为“常规清岩法” ,利用旋转自动导向系统以及小井眼钻井的方法可以解决大位移水平井岩屑床问题。

The structure peculiarities and formation of application of different rotary drill tools, including helicoidal drill head, rotary drill bucket, tube-shaped ringlike bit and under reamer, were introduced. The application results of the tools in construction of railway Qinghai to Tibet were also briefly mentioned.

介绍了旋挖钻进所用的各种钻具结构特点及适用地层,包括螺旋钻具、旋挖钻斗、筒式环状钻头、扩底钻头。并介绍了这些钻具在青藏铁路等工程施工中应用所取得的良好效果。

 
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