Marine petroleum fixed platform deep water taking method

Abstract

The invention relates to a marine petroleum fixed platform deep water taking method. According to the method, a protecting pipe is adopted, wherein the protecting pipe is divided into a protecting pipe shallow water section, a protecting pipe transition section and a protecting pipe deep water section, the protecting pipe shallow water section is arranged on a platform deck, a sea water pump is arranged in the protecting pipe shallow water section through a centralizer, the upper end of the protecting pipe shallow water section is provided with a pairing flange, the pairing flange is fastened and connected with a protecting pipe top flange, a sea water pump outlet pipeline is arranged on the protecting pipe top flange, the water entering depth of the protecting pipe deep water section is set according to water taking temperature requirements, the water entering depth of the sea water pump is the normal immersion depth, water taking points are positioned at the surface layer, the middle layer or the bottom layer of sea water, and in addition, the protecting pipe deep water section extends to the set water entering depth along the inclination angle of a guide pipe frame and is then fixed with the guide pipe frame. The marine petroleum fixed platform deep water taking method has the advantages that the problems of model selection, installation and later-period use and maintenance of the sea water pump in the existing water taking mode are solved, in addition, a large number of steel materials is saved, and the convenient hoisting and maintenance of the sea water pump can be realized.

Description

technical field [0001] The invention relates to a method for taking water from an oil platform, in particular to a method suitable for deep-water water taking on a fixed offshore oil platform. It belongs to the field of offshore oil engineering. Background technique [0002] In offshore oil and gas fields, seawater pumps are important mechanical equipment used to provide seawater to platforms. [0003] At present, the jacket of domestic offshore oil fixed platforms is generally below 100m, and the water entry depth of the seawater pump protection pipe is usually no more than 20m below sea level. The bottom of the protective tube is about 500mm. [0004] With the development of some deep-water oil fields, in order to effectively and rationally use water resources, in the process flow, it is usually designed to draw water from deep water to meet the platform's requirements for cooling water temperature. For example, according to the traditional design method, the water entr...

AI Technical Summary

Problems solved by technology

For example, according to the traditional design method, the water entry depth of the seawater pump and the protective pipe need to be extended to 100m below the sea level, which will greatly increase the length of the lift pipe of the seawater pump, and cause serious damage to the selection, installation, and later use and maintenance of the seawater pump. It is more difficult and greatly increases the project cost

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