Petroleum Science >2010,??Issue 3:??390-396 DOI: https://doi.org/10.1007/s12182-010-0083-z
Microwave propagation in air drilling Open?Access
文章信息
作者：Meng Xiaofeng,Chen Yijian,Zhou Jing and Meng Yingfeng
作者单位：
Physics Department, Beijing Normal University, Beijing 100875, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;Physics Department, Beijing Normal University, Beijing 100875, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
投稿时间：2009-05-06
引用方式：Meng, X., Chen, Y., Zhou, J. et al. Pet. Sci. (2010) 7: 390. https://doi.org/10.1007/s12182-010-0083-z
文章摘要
This paper examines the feasibility in air drilling of transmitting down-hole signals by using microwaves. Firstly the basic theory of microwave propagation in the drill-pipe or casing was studied, including power loss, cutoff wavelength, and dust scattering. Theoretical analysis indicates that the microwave propagation distance in a Ф214mm casing can easily reach 5,000 m. When the effect of dust particles is taken into account, the propagation distance decreases to 2,000 m. We conducted both laboratory experiments and field tests in casings commonly used in oilfields. The field tests show that
the effective propagation distance of microwave in the casing is about 1,300 m. The experimental results do not match well with theoretical prediction, but are acceptable. In future commercial applications, by applying multiple relay amplifiers, the microwave propagation distance could be long enough for most drilling wells.
the effective propagation distance of microwave in the casing is about 1,300 m. The experimental results do not match well with theoretical prediction, but are acceptable. In future commercial applications, by applying multiple relay amplifiers, the microwave propagation distance could be long enough for most drilling wells.
关键词
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Microwave, waveguide, drill-pipe, casing, air drilling