Connecting device for deepwater FPSO rotating tower and rigid stand pipe

Abstract

The invention relates to a connecting device for a deepwater FPSO rotating tower and a rigid stand pipe. The connecting device for the deepwater FPSO rotating tower and the rigid stand pipe is characterized by comprising a flexible stand pipe, an I-type pipe, a supporting block, a centering device and a bending stopping device. Through the connecting device for the deepwater FPSO rotating tower and the rigid stand pipe, the rigid stand pipe at low cost can be directly connected to the FPSO rotating tower, the selection of production pipes of FPSOs operating in deepwater areas is not limited to single-top stretching stand pipes, composite stand pipe towers and flexible stand pipes which are extremely high in cost any more, the technical requirements for the connectors of the stand pipe of the FPSO rotating tower are lowered, and cost is lowered to a certain extent. Even though the connecting device for the deepwater FPSO rotating tower and the rigid stand pipe is designed for the FPSO rotating tower, the connecting device for the deepwater FPSO rotating tower and the rigid stand pipe can also be popularized to connection of other types of offshore floating type structures and rigid stand pipes, and therefore, the connecting device for the deepwater FPSO rotating tower and the rigid stand pipe can be widely applied to the fields of deep sea engineering and deep sea oil and gas resource development.

Description

technical field [0001] The invention relates to a connection device, in particular to a connection device between a deepwater FPSO (Floating Production Storage and Offloading, floating production storage and offloading device) turret and a steel riser. Background technique [0002] FPSO has been widely used in the world's offshore oil and gas development due to its advantages of full-sea operation, strong sea area adaptability, long-term mooring, large storage capacity, reusable transferability, short construction / modification cycle, low cost, and fast return on investment. It has become a mainstream facility for offshore oil and gas production. With the expansion of the offshore oil industry to the deep water field and the development of marginal oil fields, there will be a potential market and broad development space for FPSO. FPSO usually has a large oil storage capacity and high stability. However, due to the large water plane of FPSO, it can be used in the periodic sec...

AI Technical Summary

Problems solved by technology

[0004] The flexible jumping pipe of the single-top tensile riser / composite riser tower is directly connected to the FPSO turret. The flexible jumping pipe has a shorter length and less liquid in the pipe, which reduces the load on the FPSO. Therefore, in the FPSO turret Deep waters have been promoted to a certain extent, but due to its high cost, it is difficult to promote its use in large areas

Flexible risers are also expensive and difficult to promote and use in large areas

Although the steel riser is more economical, if the steel riser is directly connected to the FPSO turret, the riser joint of the FPSO turret will bear a large load, resulting in serious fatigue damage to the riser joint, which will bring serious damage to the system. to risk

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