Novel fusible plug and application method thereof

Abstract

The invention provides a novel fusible plug. The novel fusible plug is used for stimulating a hydraulic touching device of an oil well safety valve, and comprises a fusible plug body and fusible alloy, wherein an external thread is formed in the outer wall of the fusible plug body, a fusion channel is formed in the internal axial direction, and penetrates through the fusible plug body, and a stepis arranged at the first end of the fusible plug body; the fusible alloy is poured into the fusion channel and used for completely sealing the fusion channel. The invention also discloses an application method for the fusible plug. According to the novel fusible plug, the cost of the fusible plug is low, installing is convenient, the structure is simple, the hydraulic touching device can be effectively stimulated to turn off the oil well safety valve, the turn-off speed is greatly increased, the disposition speed of a dangerous omen is further increased effectively, security coefficients of oil-well operation are increased, and the novel fusible plug has the good popularization value and practical value.

Description

technical field [0001] The invention relates to the technical field of oil exploitation safety equipment, in particular to a fusible plug used for a hydraulic actuator to shut off an oil well safety valve in an emergency. Background technique [0002] The hydraulic actuator is a part of the oil well safety system, which can quickly shut off the oil well safety valve in the event of a fire to ensure the safety of oil well operations. At present, fusible plugs are usually used to activate hydraulic actuators to switch oil well safety valves. The fusible plug is usually composed of a fusible plug body and a fusible alloy, which are fixed together by mosaic. The usual way to install the fusible plug is to install the fusible plug on the upper end of the actuator when the safety valve is in the fully open position, and the fusible alloy at the bottom of the fusible plug is against the top of the hydraulic actuator plunger. The upward movement of the push rod of the hydraulic ac...

AI Technical Summary

Problems solved by technology

However, under normal circumstances, due to the large volume of the fusible alloy in the fusible plug, it takes a certain amount of time to completely melt, so that the safety valve is not closed in time.

And if the melting is not sufficient and uniform, the safety valve cannot be completely shut off, and the danger may even be expanded, posing a safety hazard

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