Blowout preventer shell

Abstract

The invention discloses a blowout preventer shell which is characterized by being a rectangular ultrahigh-pressure blowout preventer shell, wherein a plurality of side holes are formed in the shell; the shell is of a double-shell material structure made of 25CrNiMo low-carbon alloy steel and is forged in a quenching and tempering heat treatment way; weight-reduced reinforcing ribs are cast outside the shell; and an anticorrosive paint layer is smeared inside the shell. The blowout preventer shell disclosed by the invention has relatively high yield strength, tensile strength and fatigue strength because of being made of 25CrNiMo low-carbon alloy steel and also has plasticity and toughness; the side holes formed in the shell can be used for throttling and releasing pressure, so that the safety performance is high; and an anticorrosion paint is smeared on the surface of the shell, so that the service life of the blowout preventer is favorably prolonged, and the blowout preventer is high in comprehensive performance and very high in economic benefit.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a blowout preventer housing. Background technique [0002] The blowout preventer is used to close the wellhead in the process of oil testing, workover, and completion to prevent blowout accidents. It combines the functions of full seal and half seal. It has the characteristics of simple structure, easy operation, and high pressure resistance. , is a safety sealing wellhead device commonly used in oil fields to prevent blowout. [0003] The casing is the main body of the blowout preventer and an important part that withstands high pressure. The casing of the blowout preventer requires high pressure and leakage tests. Therefore, the steel castings for the casing should be high-quality steel castings, and chilled iron should not be used. If cold iron is used, the quality of steel castings will be lower than that of ordinary steel castings, and the goal of high-quality steel castings cannot b...

AI Technical Summary

Problems solved by technology

[0003] The casing is the main body of the blowout preventer and an important part that withstands high pressure. The casing of the blowout preventer requires high pressure and leakage tests. Therefore, the steel castings for the casing should be high-quality steel castings, and chilled iron should not be used. If cold iron is used, the quality of steel castings will be lower than that of ordinary steel castings, and the goal of high-quality steel castings cannot be achieved