《Table 1 Application of Maurer 7 3/4″high-temperature turbodrill in EE-2 well》

《Table 1 Application of Maurer 7 3/4″high-temperature turbodrill in EE-2 well》   提示:宽带有限、当前游客访问压缩模式
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《Development and application of turbodrills in hot dry rock drilling》


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In the drilling process of the EE-3 well,the Maurer high-temperature turbodrills worked very well,7 3/4″high-temperature turbodrills worked successfully 14 times out of the total 17 times,and the 2 failings were result of bearing failure due to ineffective float valves,1 failing was the result of drill brake from necking.In the drilling process of8 3/4″hole,the use of 5 3/8″high-temperature turbodills succeeded 8 times directional drilling.