TDC

MEASURING, RECORDING, AND DATA PROCESSING INSTRUMENTS AND APPARATUS USED IN CONTROLLING AND MONITORING DRILLING OPERATIONS FOR SUBSOIL SUBSTANCES

GRAPHS, DRAWINGS, PHOTOGRAPHS, AND DIAGRAPHIC CHARTS TO RECORD THE RESULTS AND TO AID IN THE INTERPRETATION OF RECORDED MEASUREMENTS IN CONTROLLING DRILLING OPERATIONS FOR SUBSOIL SUBSTANCES

CUSTOM CONSTRUCTION AND REPAIR OF MEASURING, RECORDING, AND DATA PROCESSING INSTRUMENTS AND APPARATUS USED IN CONTROLLING OPERATIONS FOR SUBSOIL SUBSTANCES AND CONSTRUCTION SUPERVISION FOR DRILLING OPERATION OF SUBSOIL SUBSTANCES