Water buoy multilayer tieback pipe tieback device for deepwater drilling operation

Abstract

The invention discloses a water buoy tieback pipe tieback device for deepwater drilling operation. The device comprises a buoy, an upper wellhead, a lower wellhead and a tieback pipe connector, wherein the upper wellhead is formed on the buoy, and the tieback pipe connector is arranged on the lower wellhead; and a composite tieback pipe is arranged between the upper wellhead and the tieback pipe connector, the composite tieback pipe comprises at least two layers of tieback pipes sleeved in turn, one end of the tieback pipe is hung on the upper wellhead, and the other end of the tieback pipe is hung on the tieback pipe connector. A multilayer tieback pipe mounting structure is adopted; because of the installation of the multilayer tieback pipes, the tension between the buoy and the tieback pipe of each layer is changeable, and the tension can be adjusted by using corresponding instruments and devices so that the device can ensure normal operation of the buoy and the tieback pipes under the action of deepwater sea current and plays a role in resisting fatigue of the tieback pipes and even breakage; and even when the tieback pipe of the inner layer is damaged, the tieback pipe of the adjacent outer layer plays a connecting role, so the device ensures that the development of deep-sea oil fields is safer.

Description

technical field [0001] The invention relates to a tie-back device for a buoy in water for a deep-sea drilling operation. Background technique [0002] The existing buoy return pipe device usually only installs a single-layer return pipe, and the operation mode of the single-layer return pipe is prone to fatigue and even breakage of the return pipe under the action of deep water currents. Contents of the invention [0003] Aiming at the problems existing in the prior art, the object of the present invention is to provide a tie-back device for buoy buoy in water in deep sea drilling operations which is resistant to fatigue and fracture and ensures the normal operation of the tie-back and buoy. [0004] A buoy return pipe connection device in water used in deep sea drilling operations of the present invention comprises: a buoy, an upper wellhead, a lower wellhead, and a connection pipe connector, the upper wellhead is arranged on the buoy, and the return pipe connector is arr...

AI Technical Summary

Problems solved by technology

[0002] The existing buoy return pipe device usually only installs a single-layer return pipe, and the operation mode of the single-layer return pipe is prone to fatigue and even breakage of the return pipe under the action of deep water currents

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