37
Building construction; repair; installation services; oil and gas pumping and extraction services; information, advisory and consultancy services in relation to all of the aforesaid
40
Treatment of materials; oil and gas production services; oil and gas well treatment services; oil and gas well fracturing and stimulation services; oil and gas well completion services; oil and gas well perforation services; information, advisory and consultancy services in relation to all of the aforesaid
42
Scientific and technological services and research and design relating thereto; industrial analysis and research services; design and development of computer hardware and software; engineering; engineering design; engineering consultation; engineering, design, modelling, technical consultancy and engineering project management services relating to oil and gas production, oil and gas well treatment, oil and gas well fracturing and stimulation, oil and gas well completion and oil and gas well perforation; analysis and analytical services for oil and gas field exploration; conducting feasibility services relating to oil and gas exploration and exploitation; technical inspection services; preparation of engineering documents and reports; testing and inspection services; surveying and expert reporting services relating to technology; engineering research; feasibility studies; conceptual engineering studies; design and design verification services; technical project studies and evaluation; technical research and evaluation; computer-aided and computer-assisted design engineering services; quality control services; quality assurance services; computerised analysis of data, computerised modelling and simulation relating to oil and gas reservoir characterisation, oil and gas production, oil and gas well fracturing and stimulation, oil and gas well completion and oil and gas well perforation; geological and geomechanical engineering, research, design, modelling and consultancy; testing and analysis of oil and gas well workings; computerised data analysis in relation to oil and gas well performance and efficiency, oil and gas reserves determination and oil and gas production forecasting; information, advisory and consultancy services in relation to all of the aforesaid