Chen, W., 2020. A model of transaction cost control for offshore drilling materials based on durability of steel structure. In: Yang, Y.; Mi, C.; Zhao, L., and Lam, S. (eds.), Global Topics and New Trends in Coastal Research: Port, Coastal and Ocean Engineering. Journal of Coastal Research, Special Issue No. 103, pp. 860–863. Coconut Creek (Florida), ISSN 0749-0208.

The offshore oil drilling is presented as large investment, large scale and high risk. The transaction cost of offshore drilling materials directly influences the economic benefits of drilling teams and drilling companies. Therefore, a model of controlling the transaction cost of offshore drilling materials based on the durability of steel structure was proposed. Meanwhile, the cost control model of offshore drilling materials transaction with six functions, including model initialization, material consumption design, procurement management, inventory management, material cost calculation and statistical analysis, was built. This model was composed of order signing, engineering design, material consumption, material audit, purchase plan, purchase contract, warehouse entry control, durability evaluation of steel structure and material accounting. The durability of steel structure was evaluated by analytic hierarchy process based on three aspects of corrosion damage, fatigue damage and mechanical damage, including fifteen durability indexes. Experimental results show that when the proposed model is used control the transaction cost of offshore drilling materials of five construction teams in the Bohai Sea drilling project department, the transaction costs are reduced by 3646 Yuan, 2105 Yuan, 3366 Yuan, 3856 Yuan and 3785 Yuan per working day, so the effectiveness of the proposed model was effectively verified.