Tension leg platform

Abstract

The invention belongs to the technical field of offshore work platforms and particularly relates to a tension leg platform which comprises a platform body, a tension leg and four anchors. The four anchors are located below the front left portion, the front right portion, the back left portion and the back right portion of the platform body respectively. The tension leg comprises four vertical steel cables and four inclined-pulling steel cables. A front left underwater tension winch, a front left underwater anchoring winch, a front right underwater tension winch, a front right underwater anchoring winch are arranged at the front end of the upper portion of the platform body. A back left underwater tension winch, a back left underwater anchoring winch, a back right underwater tension winch and a back right underwater anchoring winch are arranged at the back end of the upper portion of the platform body. The four underwater tension winches respectively vertically draw the four anchors through the four vertical steel cables, and the four underwater anchoring winches are respectively connected with the four anchors through the four inclined-pulling steel cables. The tension leg platform has the advantages of solving the technical problem of underwater unmanned remote control and being capable of resisting underwater turbulent flow and complex operation load change by utilizing self adaptation characteristics of a tension leg support system.

Description

technical field [0001] The invention belongs to the technical field of offshore operation platforms, and in particular relates to a tension leg platform. Background technique [0002] The tension leg platform has been continuously developed in more than 20 years of practice, and has basically formed a typical structural form. It generally consists of three parts: platform body, tension legs and underwater anchoring system. The main idea of ​​the existing TLP design is to make the platform semi-compliant and semi-rigid. Through its own structural form, it generates a buoyancy force much greater than the self-weight of the structure. Therefore, in addition to offsetting the self-weight, the remaining part of the buoyancy acts as a pre-tightening force, acting on the vertical tension leg system of the tension leg platform, so that the tension leg is in pretension In the tension state, the larger tension leg pretension makes the out-of-plane motion (roll, pitch and heave) of t...

AI Technical Summary

Problems solved by technology

Since the tension leg platform is a semi-compliant platform, its vertical stiffness is relatively large, which can well constrain the vertical movement of the platform, but it is flexible in the plane, and the movement in the plane of the platform, namely sway, surge and sway It is compliant, so it is difficult for those who need to accurately locate the position in the plane

In addition, most of the current tension leg platforms are water platforms, and there are few universal tension leg platforms that are suitable for underwater and have higher requirements for the overall posture of the platform.

Images