摘要
通过近水平钻孔对高瓦斯煤田内煤层气实时原位探测,是提高煤层气抽放率和保证煤田开采安全的重要前提,而对孔底进行原位密封则是实现原位探测技术的关键。设计出了一种能方便快捷地实现孔底原位密封的水力封隔器,并通过了室内试验和现场应用。测试表明:密封胶筒的耐压力在有外围限制的情况下至少可达1 MPa,膨胀后的直径可达114 mm,对于Φ75 mm、Φ95 mm和Φ105 mm的煤层气钻孔完全适用。
With the gradual exploitation of the global natural resources, many countries pay more attention to the coalbed methane （CBM） resources and invest to develop the relative new technologies and stimulation measures. It is an important supporting measure for enhancing the CBM recovery rate and safe coal extraction to master the detail CBM conditions in combed through the subhorizontal drilling in-situ exploring. Furthermore, the key of it is to realize the downhole hydraulic seal. This paper creates a new-type downhole hydraulic packer that can satisfy this requirement conveniently and quickly. The indoor experiment and in-situ experiment show that this packer can be applied in engineering practice.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2008年第6期73-77,共5页
Coal Geology & Exploration
基金
国家自然科学基金青年科学基金(40702025)
国家高技术研究发展计划(863计划)项目(2006AA06Z232)
关键词
煤层气
近水平孔
水力封隔器
combed methane
subhorizontal drilling
downhole hydraulic packer
