Marine fixing platform and mounting method thereof

Abstract

The invention relates to a marine fixing platform and a mounting method thereof. The marine fixing platform is characterized in that the marine fixing platform comprises a chimney type jacket fixedly arranged in a target sea area; the chimney type jacket comprises a jacket body located below the sea level, and a drilling auxiliary device that is arranged at the top of the jacket body and is matched with a drilling vessel; the top of the drilling auxiliary device is higher than the sea level; the jacket body is a first frame formed by fixedly connecting jacket thighs, jacket horizontal drawing steel bars and jacket vertical-face oblique drawing steel bars; the drilling auxiliary device comprises a second frame formed by fixedly connecting horizontal supports, longitudinal oblique supports and upright column supporting legs; a drilling deck is fixedly arranged at the top of the second frame; the bottoms of the upright column supporting legs are connected with working points of the tops of the jacket thighs in a fastening manner; the tops of the upright column supporting legs stretch out of the top of the drilling deck; a first drilling slot for containing a marine drilling riser is formed in the drilling deck; and platform upper part assembling blocks are arranged at the tops of the upright column supporting legs.

Description

technical field [0001] The invention relates to an offshore fixed platform and an installation method thereof, belonging to the technical field of oil and gas field development. Background technique [0002] In my country’s Bohai Sea, East China Sea, and South China Sea gas field development projects, there are two drilling and completion methods for the fixed platform mode (wellhead platform): one is that the cantilever drilling ship relies on the jacket to perform drilling and completion operations in advance; Well (when the number of well slots is large). In the prior art, the drilling and completion operation of the cantilever drilling ship relying on the jacket is a commonly used solution in development projects. The drilling ship is not only docked and easy to operate, but also avoids the impact of the drilling operation on the upper part of the platform. Pollution. However, since the top elevation of the jacket is too low, the drilling ship needs to provide an auxili...

AI Technical Summary

Problems solved by technology

However, due to the harsh operating conditions in the East China Sea and the South China Sea, the engineering floating crane cannot carry out the butt welding construction of the water-resisting casing, so this part of the work needs to be handed over to the drilling and completion

Although the drilling ship has the ability to withstand harsh environmental conditions, in this case, it has caused problems such as the intersection of the interface between engineering and drilling and completion, the heavy workload of repeated coordination, and the long time span of the construction period.

[0004] In addition, in the East China Sea and South China Sea where the transitional water depth (about 100 meters) is harsh, the current layout and construction methods of the overall fixed platform can no longer adapt to the current technical level and requirements

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