J. Oppelt

The Fastest Way to the Bottom: Straighthole Drilling Device - Drilling Concept, Design Considerations, and Field Experience

A. Ligrone, J. Oppelt, A. Calderoni, 1996 .

Economic advantages of a new straight-hole drilling device

A. Savini, J. Oppelt, J. Treviranus, 1999 .

Outstanding economic advantages based on new straight-hole drilling device proven in various oilfield locations

A. Savini, J. Oppelt, A. Calderoni, 1999 .

Vertikalbohrkonzept für die KTB-Hauptbohrung

J. Oppelt, C. Chur, B. Engeser, 1990 .