Discussion of Drilling Derrick Installation of Fixed Offshore Drilling and Production Platform

Due to the complex offshore environment and drilling operation conditions,the structure of offshore drilling derrick must have high strength,high stability,wider bottom spaces and better driller's sight.The offshore drilling operators prefer to the tower type derrick.But the installation of the derrick to the fixed platform is difficult to perform due to the limits of the installation resources,environment conditions,installation duration and costs.The factors affected the derrick installation was analyzed,and the installation method was presented-lift installation of lower section and upper section assembling on site,which was successfully applied on the offshore derrick installation and provided the good reference for the future derrick installation on offshore fixed production and drilling platform,specially in extremely East and South Sea environment conditions.