A vertical one-way valve of three-plate diversion aluminum alloy with external thread joint

Abstract

The invention relates to a special valve for an offshore oil drilling platform, a vertical one-way valve of an externally threaded three-plate guide aluminum alloy, which includes an externally threaded valve body, an upper guide, a pair of half-open cylinders, a movable valve core, and a lower guide. Fluid and taper hole glands arranged symmetrically up and down, the thickness of the single plate for positioning the lower three plates is 6 to 7 mm, between the sealing surface of the upper cavity of the moving valve core and the sealing surface of the lower cavity, a pair of half-open cylinders are fixed in a closed fit A closed annular cavity is formed, so that the overall specific gravity of the moving valve core is between the specific gravity of sea water and the specific gravity of oil, and it can move with the flow direction of the medium. It is a one-way valve that does not need to consume any additional energy during the whole work; the inside of the valve body There are no intermediate objects such as springs that may cause large resistance losses, and are especially suitable for use in mucus or torrent pipelines; it avoids accidental failures caused by the bias or failure of the damping spring that cannot withstand the torrent impact, prolongs the service life, and directly Benefits and indirect benefits are objective.

Description

technical field [0001] The invention relates to a special valve for an offshore oil drilling platform, in particular to an externally threaded joint three-plate guide aluminum 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. ...

AI Technical Summary

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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