The Research And Development Of Jack-up Drilling Platform

This paper is based on a real engineering equipment development background.From Floating Hydrostatics、Wave Theory、Structure FEM Analysis, I research the key technology of jack-up drilling platform, design a platform that is used for offshore exploration.This technology can help us research geological exploration、foundation engineering. So the content of this paper has great meaning of exploraion. Also it has practical value for engineering application.The development of marine petrol and gas、offshore seabed exploration and the construction of coastal engineering needs various marine equipment.Mobile jack-up drilling platform is one of the most important marine equipment. The development and key research is the current research focus. How to meet the practical need is actually necessary. So how to develope new marine equipment and how to optimize the design is the focus of the industry and academical fields.The main research contents are the following:(1) I look up some research progress of jack-up drilling platform. I learnt relevant design and the problem of construction. I make some main aspects as the most important technology, such as the design of the jack-up drilling platform, floating and the movable float towing stability、design state、load and strength analysis of the platform. With these theories, I design a software system for offshore jack-up drilling platform.(2) According to the requirement and specification of the design, I get the principal dimensions of the jack-up drilling platform, layout the overall platform and the pile leg 、cantilever beam 、 the base of crane,get the arrangement design plan and provide the basis of subsequent design and development.(3) Based on fifth theory of Stokes, I made the program to calculate the wave load on the pile leg, got more accurate statistics. I also calculate the wind and current load under various circumstances. From the subdivision and capacity calculating, I calculate the gravity and its center, variable loading, in mobile and production condition. With all the calculation, I analyse the subsequent stability and the strength of the structure.(4) For the characteristics of mobile jack-up, considering the free trim intact stability calculation、damaged stability calculation、extreme height of gravity curve center, I got the applicable floating of the platform. Considering the wind load form 360 degree, I calculate the most dangerous stability under load. I check the stability and safety of platform.(5) Considering the pile leg 、 solid pile area and the lifting machine base the most key construction. I use ANSYS from overall structure, and loading analysis. I also analysis the strength of the platform. Under the constraint of the design. This provides the basic design of the platform structure.Also this makes the design more reasonable, more safe.