Perpendicular chromium alloy four-plate-flow-guiding one-way valve of internal threaded connector

Abstract

The invention relates to a valve special for an offshore oil drilling platform, in particular to a perpendicular chromium alloy four-plate-flow-guiding one-way valve of an internal threaded connector. The one-way valve comprises a valve body of the internal threaded connector, an upper flow guiding body, a lower flow guiding body, an upper half valve element and a lower half valve element, the outer circle of a cylindrical valve rod is in sliding fit with the inner circle of a lower flow guiding unthreaded hole, an assembling gap is reserved between the bottom end of the lower flow guiding unthreaded hole and the lower end face of the cylindrical valve rod, the machining accuracy requirement is lowered, and the one-way valve is easy to assemble; external threads of a lower cylinder are matched with internal threads of an upper cylinder in a sealed mode, and the two end faces of a cavity cylinder are closely fixed between the upper sealing end face and the lower sealing end face so that a closed annular cavity can be formed. Due to the cavity structure, the overall specific gravity of the combined body of the upper half valve element, the lower half valve element and the cavity cylinder is between the seawater specific gravity and the petroleum specific gravity, the combined body can move along with the flowing direction of mediums, and the one-way valve without any extra energy consumption in the whole working process is provided; middle objects such as a spring which may generate large resistance loss does not exist in the valve body of the internal threaded connector.

Description

technical field [0001] The invention relates to a special valve for an offshore oil drilling platform, in particular to a chromium alloy four-plate diversion vertical one-way valve with an inner screw joint 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 meter...

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

Images