Reinforced riser pipe combined structure and construction method thereof

Abstract

The invention discloses a reinforced riser pipe combined structure and a construction method thereof, and the reinforced riser pipe combined structure comprises an inner-layer sleeve and a riser pipe, wherein a T-like beam structure is welded on the outer surface of the inner-layer sleeve; and the inner-layer sleeve which is of the T-like beam structure is arranged at a position which is 5-10m below a mud line and 3-10m above the sea level, and an annular space part between the riser pipe and the inner-layer sleeve is poured and consolidated through cement. The T-like beam structure is welded on the outer surface of the inner-layer sleeve and simultaneously set along with the inner-layer sleeve, thereby facilitating the construction. By adopting the reinforced riser pipe combined structure and the construction method thereof, the size of the riser pipe can be reduced while the safe construction of well drilling is ensured, the use amount of steel can be greatly reduced while the same mechanical properties of the large-size riser pipe are ensured, and the engineering cost can be greatly saved on the premise of not affecting the construction period of well drilling.

Description

technical field [0001] The invention relates to offshore petroleum engineering equipment, in particular to a reinforced combined structure of a water-rising conduit and a construction method thereof, which is beneficial to improving the overall mechanical properties of the combined structure of a water-rising conduit. Background technique [0002] For offshore drilling, the riser is an essential and important drilling equipment. At present, the conventional methods for improving the resistance to wind, wave, current and ice of the composite structure of the riser are: [0003] Adopt a large-size riser structure or increase the wall thickness of the riser, such as figure 1 As shown, a riser 1' is sheathed on the outside of the inner casing 2' to improve the overall mechanical properties of the riser. This type of structure will increase the amount of steel used in the riser. Water conduits can greatly increase the operating costs at sea. Contents of the invention [0004...

AI Technical Summary

Problems solved by technology

[0003] Adopt a large-size riser structure or increase the wall thickness of the riser, such as figure 1 As shown, a riser 1' is sheathed on the outside of the inner casing 2' to improve the overall mechanical properties of the riser. This type of structure will increase the amount of steel used in the riser. Water pipes can greatly increase the operating costs at sea

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