37 WELL-DRILLING AND CORE SAMPLING SERVICESAND IN-FIELD CONSULTING SERVI CES RELATING TO THE INSTALLATION AND IMPLEMENTATION OF TOOLS, PARTS AN D MACHINERY OF THE WELL-DRILLING INDUSTRY WELL-DRILLING AND CORE SAMPLING SERVICESAND IN-FIELD CONSULTING SERVI CES RELATING TO THE INSTALLATION AND IMPLEMENTATION OF TOOLS, PARTS AND MACHINERY OF THE WELL-DRILLING INDUSTRY