Extended tension leg platform on basis of oblique upright columns

Abstract

The invention relates to an extended tension leg platform on the basis of oblique upright columns. The extended tension leg platform comprises a rectangular annular pontoon assembly. The rectangular annular pontoon assembly comprises four pontoons, and four upright columns are respectively connected to the upper surfaces of four intersections of the pontoon assembly in a fastened manner; a part of each upright column is positioned below a water surface, and other parts of each upright column are positioned above the water surface; the part, which is positioned below the water surface, of each upright column is of a vertical structure, and the parts, which are positioned above the water surface, of each upright column are oblique towards the center of the pontoon assembly; an included angle alpha is formed between the center line of the bottom of each upright column and the horizontal center line of the pontoon assembly; each upright column outwardly extends relative to the pontoon assembly, a plurality of tension leg suspension points are arranged on the outer side of the tail end of each extending upright column, a tension leg is suspended on each tension leg suspension point, and the tail end of each tension leg is connected onto a seabed mud surface in a fastened manner; a deck which is used for accommodating oil production equipment, oil and gas treatment equipment and well drilling and repairing equipment is connected to the tops of the upright columns in a fastened manner.

Description

technical field [0001] The invention relates to a tension leg platform, in particular to an extended tension leg platform based on an inclined column. Background technique [0002] With the development of the world economy, the demand for oil and natural gas in various countries has increased significantly. Therefore, large-scale offshore oil and gas exploration and production platforms are required. Tension leg platforms (TLP) are one of these platforms. play an important role in. The tension leg platform is a compliant structure, relying on the vertical mooring system, that is, the tension leg is connected to the seabed. Since the tension leg has a certain pre-tension at the initial stage of installation, it is in a tensioned state. Therefore, the tension leg can be moved through the pre-tension The platform is pulled down to a certain depth. The tightly pulled tension leg platform swings along with the waves in the horizontal plane, while the vertical deep movement is v...

AI Technical Summary

Problems solved by technology

This installation method has the following disadvantages: 1) The cost is high, and large-scale lifting and installation ships are required. With the rapid development of offshore oil and gas exploration in various countries in the world, the resources of large-scale lifting and installation ships are becoming more and more scarce, and installation resources should be locked in advance The difficulty is getting more and more difficult; 2) The installation risk is high, and offshore hoisting of large modules is required; 3) The weather is greatly affected, and large-scale hoisting and hoisting operations have high requirements for weather and climate control; 4) Offshore commissioning inconvenient, long time

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