Petroleum Science >2012, Issue 1: 59-65 DOI: https://doi.org/10.1007/s12182-012-0183-z
The characteristics of recycling gas drillingtechnology Open Access
文章信息
作者：Yang Shunji,Liu Gonghui and Li Jun
作者单位：
Key Laboratory of Petroleum Engineering of the Ministry of Education, China University of Petroleum, Beijing 102249, China;Key Laboratory of Petroleum Engineering of the Ministry of Education, China University of Petroleum, Beijing 102249, China; Beijing Union University, Beijing 100011, China;Key Laboratory of Petroleum Engineering of the Ministry of Education, China University of Petroleum, Beijing 102249, China
投稿时间：2011-06-20
引用方式：Yang, S., Liu, G. & Li, J. Pet. Sci. (2012) 9: 59. https://doi.org/10.1007/s12182-012-0183-z
文章摘要
Recycling gas drilling is a new drilling technology. This paper can be divided into three parts,
with the purpose of introducing and analyzing the characteristics of this new technology. First, the major
equipment characteristic of this technology was introduced. Secondly, compared with conventional gas
drilling, Angel’s model was used to analyze the wellbore flow characteristics. Due to the closed loop
and the effect of back pressure caused by the equipment, the gas flow rate decreases dramatically during
drilling. Apart from this, it is also found that the kinetic energy at the casing shoe is always smaller than
that at the top of the collar. The proposing of the drilling limit concept points out the basic difference
between the two gas drilling technologies. Lastly, according to the results of the theoretical analysis,
gas supplement operations for the wellbore must be conducted. Thus, two gas supplement schemes are
presented in this paper, to provide some guidance for field operations.
with the purpose of introducing and analyzing the characteristics of this new technology. First, the major
equipment characteristic of this technology was introduced. Secondly, compared with conventional gas
drilling, Angel’s model was used to analyze the wellbore flow characteristics. Due to the closed loop
and the effect of back pressure caused by the equipment, the gas flow rate decreases dramatically during
drilling. Apart from this, it is also found that the kinetic energy at the casing shoe is always smaller than
that at the top of the collar. The proposing of the drilling limit concept points out the basic difference
between the two gas drilling technologies. Lastly, according to the results of the theoretical analysis,
gas supplement operations for the wellbore must be conducted. Thus, two gas supplement schemes are
presented in this paper, to provide some guidance for field operations.
关键词
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Recycling gas drilling technology, major equipment, flow characteristics, comparativeanalysis, gas supplement scheme