Pressure switch of perforating gun

Abstract

Disclosed is a pressure switch of a perforating gun. The pressure switch includes a sleeve and a piston assembly axially and slidably arranged in an inner hole of the sleeve. The piston assembly includes a contact, a conductive pin and an insulating sleeve. An insulating ring sleeves the conductive pin. A conductive ring sleeves the insulating ring. A first elastic conductive assembly electricallyconnected to a first wire and a second elastic conductive assembly electrically connected to a second wire are axially spaced apart from each other in the inner hole of the sleeve. The conductive ring is in contact with or separates with the second elastic conductive assembly during axial movement so as to switch a conduction or separation state of the first elastic conductive assembly and the second elastic conductive assembly. Moreover, in the separation state, the second elastic conductive assembly is in contact with the conductive pin, and the first elastic conductive assembly is in contact with the conductive ring or the insulating ring. The wires in the invention are fixed and do not generate stress so as to prevent the wires from being broken in blasting impact. In addition, the conductive ring and the contact are separated by the insulating ring, which can realize reliable separation of the second wire and the contact in a triggering state.

Description

technical field [0001] The invention belongs to the technical field of perforating guns, in particular to a pressure switch of a perforating gun. Background technique [0002] During oil well completions, oil wells need to be perforated. The perforating gun pressure switch is used for the electrical connection between gun sections, and can withstand the high temperature and high pressure environment downhole for a short time, preventing the liquid in the well from entering the unexploded perforating gun and damaging the internal structure of the unexploded perforating gun. [0003] The internal trigger structure of the common perforating gun pressure switch products on the market is inertial embracing type. The typical product structure is as follows: figure 1 and figure 2 As shown, its working principle is as follows: before the sub-section of the next-stage perforating gun is blasted, the pressure switch is in the normal state, the wire II 101 and the contact 102 are co...

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to propose a perforating gun pressure switch with a new structure, which solves the technical problems that the wire is broken due to the stress generated by the accelerated movement and the unreliable separation of the wire and the contact in the trigger state causes the perforation failure.

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