Operational Performance Requirements For Motor Power Sections Used in Geothermal Drilling Based Upon Minimum Specific Energy

Operational performance requirements are needed to support development of specifications for downhole motor power sections to be used for drilling hard rock during...为制定将在……期间用于硬岩钻井的井下马达动力段（downhole motor power sections）的技术规格，需明确相应的作业性能要求