Floating type self-elevating drilling platform

Abstract

The invention discloses a floating type self-elevating drilling platform which is provided with a main deck, an upper structure of the main deck, a floating pad, pile legs, an elevating mechanism and a mooring system. The area and the thickness of the floating pad are larger than those of the main deck, the center of the floating pad is provided with a moon pool, and the floating pad is internally divided into a plurality of bins. A well drilling module is located on or is close to the upper portion of the geometrical center of the main deck, the number of the pile legs is three, the three pile legs are of a truss structure, the bottom of each pile leg is in rigid connection with the floating pad, and the main deck vertically lifts along the pile legs through the elevating mechanism and is fixed at the predetermined height. Each pile leg comprises an upper section hollow sealing body and a lower section hollow sealing body, and during the operation, the waterline is located within the height range of the upper section and is positioned through the mooring system. Different from a traditional self-elevating platform, the floating type self-elevating drilling platform is not in contact with a seabed during the operation, the floatation center is higher than the gravity, the movement performance is good, the oil storage capacity is high, and the floating type self-elevating drilling platform can be used for oil gas drilling and production in a sea area within a 500-meter water depth and is particularly suitable for a water depth of 200-500 m.

Description

technical field [0001] The invention relates to offshore oil and gas drilling equipment, in particular to a floating self-elevating drilling platform. Background technique [0002] In today's world where the demand for energy is getting stronger and the onshore oil and gas resources are becoming increasingly depleted, opening up wider energy supply channels has become the focus of the development of all countries in the world today, and the development of offshore oil and gas extraction technology is particularly rapid. The proportion of total offshore oil and gas production in the world's total oil and gas production has risen from 20% in 1997 to more than 40% at present, of which deep-sea oil and gas production accounts for more than 30% of offshore oil and gas production. Therefore, for the three major offshore drilling equipment, jack-up drilling platform, semi-submersible drilling platform and drilling ship, deep water is a major development trend. [0003] Jack-up dri...

AI Technical Summary

Problems solved by technology

If a new semi-submersible platform and drilling ship are built for the oil area with a water depth of 200-500 meters, it can meet the technical and construction requirements of mining, but it will cost a lot of money, which can be described as "overkill", and the economy is not good

On the other hand

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