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| Experimental research on ratio of weight on bit for reaming while drilling tools |
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GUAN Zhi-chuan,WEI Wen-zhong, XIA Yan
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(College of Petroleum Engineering in China University of Petroleum, Dongying 257061，Shandong Province，China)
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| Abstract: |
| To study the effect of the peculiar borehole created by reaming while drilling tools on the ratio of weight on bit (WOB) , an experimental facility modeling the dynamic characteristic of the drill string with reaming while drilling tools was established based on the similarity principle. The experimental research on the ratio of WOB for the reaming while drilling tools was carried out. And the results show that the rock around the ladder borehole is apt to fall into pieces compared with the rock around the pilot hole. The actual ratio of WOB is smaller than that calculated by the geometry method，which agrees well with the result obtained by the theoretical method. |
| Key words: reaming while drilling tools ratio of weight on bit experimental research |
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