Building construction; construction of public works and rural works, namely, pipeline construction, concrete pouring and forming for building and other commercial or public concrete structures, road paving, road construction, road sealing and stripping, construction of underground utilities and housing pads, construction of oil and gas, petrochemical and energy refineries and plants; rental of construction tools and equipment; maintenance and cleaning of buildings, premises, and floors; upkeep and cleaning of various objects, namely, components of oil and gas production and processing installations, components of chemical, biological and industrial processing installations; laundering; furniture, instrument and tool repair; drilling of wells; pier breakwater building; erection of naval scaffolding; road paving; airplane maintenance and repair; burner maintenance and repair; rental of construction equipment; heating equipment installation and repair; air conditioning apparatus installation and repair; construction consultation; construction of buildings; construction management; building construction information; demolition of buildings; scaffolding; cleaning of exterior surfaces buildings; installation and repair of electric apparatus, namely, motors and heating apparatus; warehouse construction and repair; building sealing; mining extraction; drilling of deep oil or gas wells; well drilling services on land and at sea; furnace installation and repair; fire alarm installation and repair; irrigation devices installation and repair; installation of building insulation; rental of cranes for construction purposes; rental of drainage pumps; installation, maintenance and repair of machinery; masonry; shipbuilding; street cleaning; pipeline construction and maintenance; harbor construction; installation and repair of refrigeration apparatus; repair information in the field of oil and gas production and processing components, and chemical, biological and industrial processing components; rustproofing; underwater construction; underwater repair apparatus; factory construction; oil field services, namely, maintenance and repair of wellhead, fluid control and metering systems for land and subsea oil and gas drilling, production, refining and transportation

Oil and geological prospecting; services of engineers, namely, mechanical, civil, electrical, chemical and petroleum engineering services; professional consulting in computers; mechanical, civil, electrical, chemical and petroleum engineering not for building; scientific laboratory services; mechanical and chemical engineering for activities in industrial fields, assemblies and units and turnkey industrial facilities; structural engineering for renovation, repair and modernization of industrial complexes and units; engineering design applied to outfitting and tertiary equipment; petroleum engineering services; continental and underwater civil engineering services; conducting of scientific feasibility studies, research and development of new processes and products for others; provision of technical studies of new processes and products for others; geological estimations in the field of engineering and exploitation of oil fields; searching for oil, gas and ore deposits in general; scientific and industrial research in the field of computers, engineering, design, construction, project management and process technologies; construction drafting; oil-well testing; quality control for others; industrial design; consulting services in the field of energy saving; measuring, namely, calibration; computer system analysis; water analysis; architectural services; energy auditing; chemistry consultation services; chemical research; chemical analysis; computer system design; conversion of data or documents from physical to electronic media; conversion of computer programs and data, other than physical conversion; surveying; underwater exploration; geological prospecting; geological surveys; geological research; analysis for oil-field exploitation; oil-field surveys; scientific information and consultancy in relation to carbon offsetting; software design; updating of software; rental of computer software; computer software maintenance; installation of software; computer software consultancy; testing of materials; mechanical research; programming for computers; oil prospecting; physics research; technical project study, namely, conducting scientific feasibility studies in the field of new technologies; research in the field of environmental protection; bacteriological research; technical research in the field of computers, engineering, design, construction, project management and process technologies; biological research; recovery of computer data; hosting of servers; information technology consultancy; technical consulting and engineering services in relation to testing, calibration, reading and data analysis of petroleum metering systems; subsea civil engineering; oil field services, namely, engineering of wellhead, fluid control and metering systems for land and subsea oil and gas drilling, production, refining and transportation