现时钻头进尺 BTFT

纯钻进时间 actual bit on bottom time ; [矿业] net drilling time ; reciprocat ; actual drilling time

钻进时间 penetration time ; [油气] drilling time ; boring time

非钻进时间 out-of-hole time

总钻进时间 total frilling time ; gross drilling time

钻进时见到的最高气量 HG

喷孔时的钻进工艺 Drilling Technology in Borehole Blowout

纯钻进时间率 reciprocating time ratio ; net penetration time percentage