PROCESSING METHOD OF DRILLING DERRICK FOR SHIP OR OFFSHORE STRUCTURE

摘要

PURPOSE: A manufacturing method of a drilling derrick for a ship or a marine structure is provided to reduce the manufacturing time by simplifying a manufacturing process of the drilling derrick. CONSTITUTION: A manufacturing method of a drilling derrick for a ship or a marine structure is as follows. Left and right side outer frameworks of a lower derrick are formed. Preassemblies of left and right sides of the lower derrick are formed. The preassemblies are stood up according to an assembly position by using a crane. The lower derrick is completed by assembling trust materials by bolting. Left and right side outer frameworks of an upper derrick are formed. Preassemblies of left and right sides of the upper derrick are formed. The upper derrick is raised by using the crane on the assembly position on the lower derrick, and then the derrick is completed by assembling the upper derrick and the lower derrick.