Design of Rotating Ring and Wedge Type Hydraulic Jacking System

In order to reduce investment risk,new production platforms with moving and self-installing functions are required for offshore marginal oil fields developing.To implement the moving and self-installing functions of the new type platforms,a new rotating ring and wedge type hydraulic jacking system was designed.The system consists of the top and low pile-pinching devices,pile-locking devices,lifting and rotating hydraulic cylinders,the pile-reinforcing barrel,and the pile leg.The platform is lifted and lowered by the concertina motion of lifting hydraulic cylinders,and the pile is locked and unlocked by the concertina motion of rotating hydraulic cylinders.The system which has the characteristics of safe and reliable operation,economical cost,technology nationalization,removability and reusability,is of great significance for the offshore marginal oil fields developing.