Perforating explosion-proof gun device

Abstract

The invention discloses a perforating explosion-proof gun device, which comprises a perforating gun. An explosion interruption mechanism is arranged on a gun head of the perforating gun, a water opening mechanism is arranged at the tail end of the perforating gun, and the two mechanisms are matched to use, wherein the water opening mechanism is used as the tail of the perforating gun; during the transportation of pipe columns or when the transportation is finished, if well inlet liquid is not in the perforating gun, the external pressure of the perforating gun is large, and an explosion transfer passage is opened to safely transfer explosion perforating gun strings; if larger amount of water enters the perforating gun, the internal pressure and the external pressure are balanced, the explosion transfer passage is closed, the explosion transfer is blocked, and a perforating bullet which prevents immersion explodes so as to prevent gun bomb accidents; and if the perforating gun is leaked, the pressure difference exists in and out of the perforating gun, the explosion transfer passage of the explosion interruption mechanism is in an opening state, but a part of scattered perforating bullets are immersed into water, the water opening mechanism is acted by water, a sealed rubber pad is opened, large amount of well liquid bursts into the perforating gun so as to cause the balance of the internal pressure and the external pressure of the perforating gun, and the explosion transfer passage of the explosion interruption mechanism is closed to prevent the gun bomb accidents.

Description

technical field [0001] The invention relates to the improvement of a perforating gun, in particular to a perforating anti-explosion gun device, which can prevent gun explosion accidents during perforation construction. Background technique [0002] There is a sealing problem in the sealing system itself or the sealing system is damaged or completely invalidated during the pipe string transmission process. Because the pressure of the well fluid outside the perforating gun is very high, the well fluid will slowly seep into the perforating gun or fill the perforating gun, and the perforation The projectile will be soaked in the well fluid. Because most of the explosives used for perforating bullets and the explosives used for detonating cord have a certain degree of water resistance, the detonation wave is still transmitted along the detonating cord after the detonator is detonated. In the well fluid, the perforating bullet cannot form a jet, and the detonation wave relies on t...

AI Technical Summary

Problems solved by technology

[0002] There is a sealing problem in the sealing system itself or the sealing system is damaged or completely invalidated during the pipe string transmission process. Because the pressure of the well fluid outside the perforating gun is very high, the well fluid will slowly seep into the perforating gun or fill the perforating gun, and the perforation The projectile will be soaked in the well fluid. Because most of the explosives used for perforating bullets and the explosives used for detonating cord have a certain degree of water resistance, the detonation wave is still transmitted along the detonating cord after the detonator is detonated. In the well fluid, the perforating bullet cannot form a jet, and the detonation wave relies on the well fluid in the perforating gun to transmit the pressure to the perforating gun. If the pressure exceeds the pressure limit of the perforating gun, a gun explosion accident will occur

Although the probability of damage or complete failure of the sealing system of the perforating gun is very low, the consequences of a gun explosion accident are very serious, and the cost of dealing with the gun explosion accident is also very high, and even the construction well is scrapped

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