A cylindrical semi-submersible drilling platform

Abstract

The invention discloses a cylindrical semi-submersible drilling platform. The cylindrical semi-submersible drilling platform comprises a buoyancy tank, a cylinder body and a deck from bottom to top insequence, wherein the buoyancy tank and the deck are arranged at the two ends of the cylinder body; the cylinder body is a double-layer cylinder, four through holes are formed in the wall surface ofthe cylinder body, every two through holes are symmetrical, and a stand column is formed by the part between every two adjacent through holes; each through hole is formed by two semi-circular holes inthe two ends and a square hole in the middle in the longitudinal direction of the cylinder. With the adoption of the opening pontoon (namely, the double-layer cylinder body) and the internally and externally extending annular buoyancy tank, the heave plate has a large area, the cylindrical semi-submersible drilling platform can reduce heaving amplitude and improve heaving performance as comparedwith a semi-submersible type drilling platform, can reduce weave load, reduce mooring force and improve movement performance of the platform as compared with a round platform, and can meet the requirement of drilling operation of the platform under harsh marine environmental conditions such as South China Sea and the like.

Description

technical field [0001] The invention relates to a semi-submersible drilling platform, in particular to a cylindrical semi-submersible drilling platform. Background technique [0002] Deepwater oil and gas development is an inevitable trend in the development of offshore oil and gas. The current low oil price has a certain impact on the development of offshore oil, especially the development of deepwater oil and gas fields, but the demand for energy is the driving force for the continuous development of deepwater oil and gas fields. Due to the uncertainty of deep-water geological reservoirs and the high cost of deep-water oil-gas development facilities, the development of deep-water oil-gas fields is highly risky. In order to reduce the economic risk of deep-water oil and gas field development projects, new-type deep-water oil and gas field development engineering facilities floating drilling devices have always been concerned by the offshore oil industry. Deepwater semi-sub...

AI Technical Summary

Problems solved by technology

[0004] The traditional semi-submersible platform also has some disadvantages. For example, there are multiple nodes in the platform structure, which will cause the strength and fatigue of the nodes. Not only do you need to pay attention to the design, but you also need to check frequently during use to avoid cracks. At the same time, improve the semi-submersible Platform heave performance is also one of the development trends, which is more beneficial to platform drilling operations

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