Novel polar ice area semi-submersible drilling platform

Abstract

The invention provides a novel polar ice area semi-submersible drilling platform. A main structure of the platform comprises a deck and a lower floating body. The lower floating body comprises two floats arranged in parallel and a plurality of upright posts arranged between the deck and the floats, the upright posts are divided into vertical sections and inclined sections from bottom to top, and the inclined sections are inclined towards the center of the platform; in a coordinate system taking the bottom of each vertical section as an original point, each inclined section inclines towards thecenter of the platform in an XZ plane and a YZ plane; anchor chains and anchor chain anti-icing devices are arranged on the outer sides of the upright posts at a bow and a stern, and the anchor chainanti-icing devices are steel plates welded to the outer surfaces of the inclined sections; the top of each anchor chain is fixed in an anchor machine on the deck, and the middle penetrates through agap between the steel plate and the inclined section; and a vertical pipe anti-icing structure used for protecting a drilling vertical pipe or a blowout preventer to carry out lowering operation is arranged at a position of a water plane below a moon pool on the deck, and the two ends of the vertical pipe anti-icing structure are fixed to oppositely-arranged upright posts. The platform is a novelsemi-submersible drilling platform capable of resisting an arctic sea ice load effect.

Description

technical field [0001] The invention relates to drilling platform technology, in particular to a novel polar ice semi-submersible drilling platform capable of carrying out drilling operations in arctic sea areas. Background technique [0002] With the reserve replacement rate of conventional oil and gas resources decreasing and global energy consumption increasing, it is urgent to find new oil and gas reserves to meet global oil and gas demand. According to statistics, the undeveloped Arctic marine oil and gas resources account for about 30% of the world's remaining unexploited oil and gas resources. The development of Arctic marine oil and gas resources will be an important means to solve future resource shortages. [0003] At present, offshore oil and gas exploration and development activities in the Arctic are still rare, mainly due to the lack of engineering equipment that can operate in Arctic seas with ice. As far as drilling operations are concerned, conventional dr...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a new type of semi-submersible drilling platform in the polar ice region, aiming at the problem that the existing drilling platform does not have the ability to resist the ice load and can only operate in the ice-free season in summer. A new type of semi-submersible drilling platform resistant to Arctic sea ice loads

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