Research and Application of the Sealed Coring Tools

Abstract:

In order to solve the problems of difficult coring operation in the hard and broken ground with bad quality of coal core and low core recovery, sealed coring tools were used, which could basically meet the coring requirement of coal-bed gas well. Configuration features and work principles of sealed coring tools were introduced in this paper. The field practice in Inner Mongolia showed that high core recovery (more than 85%)could be obtained by using sealed coring tools.