In 1985, the first medium radius horizontal well was drilled using a down-hole mudmotor.
在1985年,第一口的中半径水平井采用井下泥浆马达技术钻成。
2
The performance difference between air crew drill and mudmotor was analyzed under the air drilling condition.
对比分析了空气螺杆钻具与泥浆马达在空气钻井井况下的性能差异。
3
Oftentimes the assembly includes a mudmotor, directional drilling and measuring equipment, measurements-while-drilling tools, logging-while-drilling tools and other specialized devices.