DESIGN AND LIFTING ANALYSIS OF 4-LEGGED WELLHEAD PLATFORM STRUCTURE IN NATUNA SEA

• Main Author: Archie Danisworo, Rahadian
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/51677
• Institution: Institut Teknologi Bandung

The structure of the jacket type offshore platform needs to be designed appropriately, so that the activities above the structure are not disturbed. The design of the structure of the offshore platform refers to the API RP2A standard. In this study, the version of the design principle used is the Working Stress Design (WSD). In the process of designing the structure of the offshore platform, it is necessary to carry out some structural analysis to determine the structure's ability due to working loading. These analyzes include in-place, seismic and fatigue analysis. In-place analysis will produce the value of the unity check member, the unity check joint can, the pile capacity and the deflection due to loading that occurs on the structure when it is placed in a predetermined location. The structure designed is also considered to be able to withstand earthquake strength level (SLE) conditions, with checks carried out as in the in-place analysis. The structure can last for 20 years (with a safety factor of 2.00 and 5.00 at mudmat). The structure will proceed to the pre-service analysis stage. One analysis that can be done is lifting analysis. The results of the lifting analysis are the lifting configuration of the braced monopod structure, the location of the crane hook point, the properties of the sling rope, the shackle property and the dimensions of the padeye that meet the API RP2A - WSD design standards.