deep water conduit device

Abstract

The invention provides a deep water guiding pipe device. The deep water guiding pipe device comprises a guiding pipe, a guiding pipe head, a water insulation pipe, an underwater well head, a well headbase and a stable plate. The upper end of the guiding pipe is fixedly connected with the underwater well head through the guiding pipe head, the upper end of the underwater well head is connected with the water insulation pipe, and the well head base is arranged outside the connecting position of the guiding pipe and the guiding pipe head in a sleeving mode. The stable plate is arranged on the outer side face of the portion, below the well head base, of the guiding pipe. According to the deep water guiding pipe device, by means of the method that the stable plate is arranged on the outer sideface, below a seabed mud line, of the guiding pipe, the bending deformation rigidity of the guiding pipe is reinforced, the anti-transverse-load capacity of the guiding pipe is improved, the transverse displacement and borne bending moment of the guiding pipe are obviously lowered, the drilling accident is effectively avoided, meanwhile the stability and safety of the deep water guiding pipe areimproved, and economic benefits are increased.

Description

technical field [0001] The invention relates to the technical field of drilling and completion of offshore oil and gas fields, in particular to a deep water conduit device. Background technique [0002] In the process of offshore deepwater drilling, the conduit is lowered into place, and after being connected with the underwater wellhead, blowout preventer and riser, it acts as a structural support. Good running and supporting effects can only be ensured if the conduit does not deflect when it is lowered to the design position below the seabed mud line. Since the upper end of the riser is connected to the drilling ship or drilling platform, under the dynamic action of wind, wave, current and other marine environmental loads, the drilling ship or drilling platform will deviate, and the complex power borne by the riser will be continuously transmitted to the pipe, resulting in The conduit is subjected to a huge lateral bending moment, and the large lateral force causes the co...

AI Technical Summary

Problems solved by technology

[0004] However, by increasing the wall thickness of the conduit, the effect of resisting the lateral load on the conduit is poor, and the conduit may still undergo lateral bending deformation, resulting in drilling accidents

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