Underwater integrated type system for vertical pipe production and conveying and mounting method thereof

An integrated, riser technology, applied in transportation and packaging, special-purpose ships, ship construction, etc., can solve the problems of asymmetric cross-section of production delivery pipes, fatigue damage VIV, complex galloping damage, etc., to reduce the deck Area and body size, meet thermal expansion requirements, avoid asymmetric effects

CN106697208AActive Publication Date: 2017-05-24DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-05-24

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Abstract

The invention discloses an underwater integrated type system for vertical pipe production and conveying and a mounting method thereof. The system comprises a vertical pipe production assembly, a vertical pipe control assembly, a combination pontoon and a mooring device. The combination pontoon comprises an outer-layer pontoon body and inner-layer pontoon bodies, and the inner-layer pontoon bodies are embedded into the outer-layer pontoon body in a sleeved mode. The outer-layer pontoon body is responsible for supplying cable mooring tensile force, and all the inner-layer pontoon bodies are each responsible for supplying top tensile force to a single corresponding rigid production vertical pipe or rigid protection pipe, so that vertical stress and motion decoupling of the mooring device and all the vertical pipes are achieved, stress and motion decoupling between all the vertical pipes are also improved, and the requirement of in-place performance of the rigid production vertical pipes is improved. According to the underwater integrated type system for vertical pipe production and conveying and the mounting method thereof, a lower-section pipe cable of a flexible control pipe cable is uniformly integrated and assembled in the rigid protection pipe, and thus the problem of complex galloping damage is avoided; and the inner-layer pontoon bodies can freely rise and fall along the outer-layer pontoon body, and thus the thermal expansion requirement of the rigid production vertical pipes is met.
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Description

technical field

[0001] The invention relates to a dry oil production platform in the technical field of offshore oil and gas development, in particular to a production standpipe system and an installation method thereof applied to a dry oil production platform in an ultra-deep water environment. Background technique

[0002] At present, there are two types of dry oil production platforms suitable for deep sea oil and gas development: TLP platform and Spar platform. The suitable production riser system for dry oil production platforms is the Top Tensioned Riser (TTR for short). The current structure of TTR adopts double-layer casing riser (outer protection pipe, inner protection pipe and production delivery pipe) or single-layer casing riser (outer protection pipe and production delivery pipe). The main function of the casing is to prevent the imbalance of marine environment pollution and pressure integrity caused by the leakage of the production pipeline. Since the weight ...

Examples

Embodiment Construction

[0066] The present invention will be further described below in conjunction with the accompanying drawings. The illustration of the present invention is described by taking four production delivery risers and one control riser as an example.

[0067] Such as Figure 1-9 As shown, an underwater integrated production delivery riser system includes a production riser assembly, a control riser assembly, a combined buoy 15 and a mooring device 14;

[0068] The production riser assembly includes a flexible production riser 31 and a rigid production riser 41, the control riser assembly includes a rigid protection pipe 40 and a flexible control umbilical 30, and the combined buoy 15 includes an outer buoy 1 and the inner buoy 5; the inner buoy 5 is nested in the outer buoy 1;

[0069] The main body of the outer buoy 1 is a ring cylinder structure, the bottom edge of the outer wall of the outer buoy 1 is connected to four cantilever buoys 2, and the four cantilever buoys 2 are unifor...