A flange joint two-plate diversion zinc alloy vertical one-way valve

Abstract

The invention relates to a valve special for an offshore oil drilling platform, in particular to a flange joint two-plate flow guide zinc alloy perpendicular one-way valve. The flange joint two-plate flow guide zinc alloy perpendicular one-way valve comprises a flange head valve body, an upper flow guide body, a cavity sleeve, a moving valve element, a lower flow guide body and taper hole glands which are symmetrically arranged in an up-and-down mode. An upper sealing outer circle of an upper circular cone cylinder is equal to a lower sealing outer circle of a lower circular cone cylinder on the moving valve element and the outer circles are in interference fit with an inner circle of the cavity sleeve to form a sealed annular cavity. Thus, the whole proportion of the moving valve element is between the sea water proportion and the oil proportion and the moving valve element can move in the medium flowing direction. An extra one-way valve which consumes energy is not needed in the whole working process. An outer circle of a cylindrical valve rod on the upper flow guide body is matched with an inner circle of a lower flow guide unthreaded hole of the plane end of the lower flow guide body in a sliding mode. An assembly gap is formed between the bottom end of the lower flow guide unthreaded hole and the lower end face of the cylindrical valve rod. The machining precision requirement is lowered and assembly is facilitated.

Description

technical field [0001] The invention relates to a special valve for an offshore oil drilling platform, in particular to a flange joint two-plate diversion zinc alloy vertical one-way valve without any hindering parts such as springs. Background technique [0002] Following the discovery of a large oil field in Venezuela in 1920 by using a wooden platform to drill wells in Lake Maracaibo, the Soviet Union successfully conducted offshore drilling with a trestle near the Baku oil field in the Caspian Sea in 1922. After 1936, the United States began to drill the first deep well in the Gulf of Mexico. In 1938, the world's earliest offshore oil field was built. From the 1940s to the 1960s, with the development of welding technology and the steel industry, drilling devices such as steel fixed platforms, sitting-bottom platforms, and jack-up platforms appeared one after another, expanding offshore oil and gas exploration to sea areas with a water depth of 30 meters. In 1950, a mobi...

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Problems solved by technology

[0003] As we all know, the cost of each maintenance of the offshore oil drilling platform system is astonishing. Seawater itself contains various corrosive compounds. During the use of offshore oil drilling platforms, crude oil contains various corrosive compounds. Generally, oil well production fluid contains water and other corrosive media. The water in crude oil vaporizes with the crude oil during the heating process, which increases the gas phase load of the pipeline, causing fluctuations in the operation of atmospheric and vacuum devices, and in severe cases, tower flushing accidents.

MgC12 and CaC12 in crude oil can be hydrolyzed to produce corrosive HCl, and HCl dissolves in water to form hydrochloric acid, which has a strong corrosive effect and causes corrosion of the pipeline system

After the crude oil is produced from the oil well, it is transported outward through the oil pipeline. Any repair or replacement of the oil circuit and the cleaning of the blocked pipeline will cost a lot, and will affect the production of the oil well for a long time.

[0004] Any component in the offshore oil drilling platform system must be able to withstand seawater corrosion. It is essential to use a check valve in the pipeline of the offshore oil drilling platform system to complete the entire delivery process. The currently used check valve, Such as: steel ball type, valve type and gravity type, the main disadvantage is: the internal spring causes a large resistance loss

The self-priming pump and other supporting one-way valves also have to overcome the gravity resistance in the whole process, resulting in additional energy consumption

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