Riser pipe shoe

Abstract

The invention relates to a riser pipe shoe, which is characterized by comprising an integrally arranged main pipe body and transition pipe body, wherein the main pipe body is a cylinder which is formed by winding a circular arc wavelike plate; the internal diameter and the external diameter of the transition pipe body are correspondingly the same as the internal diameter and the external diameter of a riser pipe respectively; the external diameter of the main pipe body is consistent with the external diameter of the transition pipe body; one end of the main pipe body is a stratum penetration end, and the other end of the main pipe body is a connecting end with the transition pipe body; the wall thickness of the main pipe body is gradually thinned from the connecting end with a filtering pipe body to the stratum penetration end; and a space with an inclination angle is formed in the main pipe body. The stratum penetration end of the main pipe body of the riser pipe shoe is thin, and the connecting end with the filtering pipe body is thick, so that the main pipe body has stronger stratum penetration capacity; and the space of the inclination angle is formed in the main pipe body, so that a pile group effect can be reduced, and an area with dense riser pipes can be more conveniently descended. The riser pipe shoe can be widely applied to the field of various petroleum exploration and development.

Description

technical field [0001] The invention relates to offshore drilling equipment, in particular to a water riser pipe shoe used in connection with a water riser during offshore oil exploration and development. Background technique [0002] In the process of offshore oil exploration and development, the riser shoe is a very important part, which plays a very important role in the smooth running of the riser. like figure 1 As shown, the existing riser shoe 1 is an ordinary round pipe. In order to enhance the rigidity of the existing riser shoe 1, a certain number of reinforcing ribs 2 are provided at intervals outside the existing riser shoe 1, However, the number of reinforcing ribs 2 provided on the outside is limited, and the increase in stiffness cannot meet the normal requirements. Therefore, it is usually necessary to add several turns of steel bars on the inner wall of the existing riser shoe 1, which not only brings inconvenience to the manufacture, but also reduces the am...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the existing riser shoe 1 is an ordinary round pipe. In order to enhance the rigidity of the existing riser shoe 1, a certain number of reinforcing ribs 2 are provided at intervals outside the existing riser shoe 1, However, the number of reinforcing ribs 2 provided on the outside is limited, and the increase in stiffness cannot meet the normal requirements. Therefore, it is usually necessary to add several turns of steel bars on the inner wall of the existing riser shoe 1, which not only brings inconvenience to the manufacture, but also reduces the amount of material used. The top is also relatively large, and the inner wall of the existing riser shoe 1 is not smooth, which brings additional resistance to the entry of the riser; the bottom of the existing riser shoe 1 usually needs to be inlaid with alloy teeth 3 to ensure The penetrating ability and rigidity of the bottom of the pipe shoe, but this increases a lot of manufacturing time. Therefore, the existing pipe shoe manufacturing process is more troublesome, and it is not conducive to the smooth insertion of the water riser

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