1) Lower German: drill-stem formation test, drill-stem test, drillstem formation test, drillstem test
2) oil&gas: drill-stem formation tester, drill-stem tester, drillstem formation tester, drillstem tester, formation tester, drill stem test, drill stem testing, drill-stem testing, drillstem testing
Универсальный русско-английский словарь. Академик.ру. 2011.