Construction of facilities, structures, living quarters, and utility buildings, production modules and subsea modules in the oil and gas industry; Construction project management services; Construction project management services in the field of construction of offshore oil and gas facilities; Construction, maintenance, and construction project management services in oil and gas fields; Consulting services in the field of offshore oil and gas facility construction; Drilling of deep oil or gas wells; Extraction of oil and gas; Laying and construction of pipelines; Oil and gas drilling; Oil and gas industrial machine cleaning services; Oil pipeline construction; Pipeline construction and maintenance; Pipeline installation and repair; Technical consulting related to the installation of oil and gas equipment, control systems, and machinery