Pile leg pitch of self-elevating drilling platform

Abstract

The invention discloses a pile leg pitch of a self-elevating drilling platform. The pile leg pitch is of a truss structure, wherein the truss structure is defined by three rectangular side faces, and the outer edge of the cross section of the truss structure is in an equilateral triangle shape. The pile leg pitch comprises landing leg chord members, main diagonal bars, auxiliary diagonal bars and inner stay bars. The three landing leg chord members are arranged at the vertexes of the equilateral triangle respectively. Each rectangular side face of the pile leg pitch comprises one main diagonal bar and one auxiliary diagonal bar located on the diagonals of the rectangular side face respectively. The two ends of each main diagonal bar and the two ends of the corresponding auxiliary diagonal bar are welded to two adjacent landing leg chord members respectively. Compared with the prior art, the number of pipes used for the pile leg pitch of an X-shaped structure is smaller, and the material cost is lowered; the number of pipe joints of the pile leg pitch is smaller correspondingly, and the welding work amount is greatly reduced; and meanwhile the stability of the pile leg pitch is better than that in the prior art due to lower borne wind loads and lower wave loads.

Description

technical field [0001] The invention relates to a pile leg pitch, in particular to a pile leg pitch of a self-elevating drilling platform. Background technique [0002] The leg structure of the jack-up drilling platform can generally be divided into two types: shell type and truss type. Although the shell type pile leg has the characteristics of simple manufacture and strong structure, it is generally used for working in water depths of 60-70m and in shallow water depths. Deepwater jack-up platforms mostly use truss-type legs, which can greatly reduce the influence of water resistance and wave loads, so that the operating water depth can be greatly increased, and can be as deep as 120 meters or deeper. [0003] As for the truss-type leg structure, in the prior art, K-type, double-K-type or X-type structures are generally used. The following table shows the comparison of these three types of pile legs. [0004] [0005] Through the comparison in the above table, it is not...

AI Technical Summary

Problems solved by technology

However, there is no relevant patent application record for the X-type pile leg. The reason is that many technical problems have not been overcome. In other aspects, the X-shaped pile leg equivalent to the double K-shaped pile leg in the prior art is a problem to be solved urgently

Images