INTRODUCTION: JACK UP UNITS ARE FLOATING STRUCTURES WHICH THEIR LEGS COULD BE JACKED DOWN AND PLACED ON SEA BED AT OPERATING TIME AS FIX DRILLING UNITS. AT PRESENT STUDY, TWO TYPICAL LEG CONSTRUCTION METHODS ARE ANALYZED AND COMPARED. IT WAS FOUND THAT THE EXECUTION OF SECOND METHOD IS MORE TIME EFFICIENT THAN THE FIRST ONE.
LEG ASSEMBLING METHODS: ONE OF THE MOST IMPORTANT PARTS OF JACK UNIT CONSTRUCTION PROCEDURE IS ASSEMBLY OF LEG SECTIONS AND CONSTRUCTION OF THEM. FOR ASSEMBLING OF LEG SECTIONS TWO TYPICAL METHODS ARE SUGGESTED THAT F& G COMPANY APPROVED THEM: 1- LEG SECTIONS ASSEMBLY FROM UNDER OF LEG WELL, 2- LEG SECTIONS ASSEMBLY FROM ABOVE OF LEG WELL.