9 Scientific apparatus and instruments for measuring data, namely, geological data, chemical data, physical data, optical data or thermal data; apparatus and instruments for conducting, distributing, transforming, accumulating, regulating or controlling electric current; measuring apparatus and instruments for measuring physical parameters, namely, geological parameters, chemical parameters, physical parameters, optical parameters or thermal parameters; apparatus and instruments for the analysis of data relating to oil and natural gas fields and the analysis of the identification and quantification of oil, gas and deposits for use in the field of subsoil resource exploration and extraction, namely, oil, gas, and geothermal resources; monitoring apparatus for monitoring data, namely, geological data, chemical data, physical data, optical data or thermal data; apparatus and instruments for use on the worksite, namely, for the analysis of effluents (gas and liquids from worksite mud) by using gas- and/or liquid-phase chromatography, with or without the use of mass spectrometry, or with or without the use of optical detection systems (tunable diode laser systems, cavity ring-down spectroscopy (CRDS) systems) for use in the field of subsoil resource exploration and extraction, namely, oil, gas and geothermal resources; laboratory apparatus and instruments, namely, chromatographs, mass spectrometers, optical detection systems (tunable diode laser systems, cavity ring-down spectroscopy (CRDS) systems), double-focusing chromatographs and mass spectrometers, double-focusing chromatographs and optical detection systems (tunable diode laser systems, cavity ring-down spectroscopy (CRDS) systems) for use in the field of subsoil resource exploration and extraction, namely, oil, gas and geothermal resources; computer software and programmes used for processing data from the analysis of the evaluation and quantification of oil, gas or deposits