US 5,027,708 A · Safe arm system for a perforating apparatus having a transport mode an electric contact mode and an armed mode

Abstract

A safe-arm or quick arm system for a perforating gun includes a body containing a detonator and an adapter head containing an electrical plug and a detonating cord shell, the body and associated detonator being rotatable relative to the adapter head and associated detonating cord shell. Upon rotation of the body relative to the adapter head, the detonator moves from a start position to a transport position. In this position, the plug is not electrically connected to the detonator and the leads connected to the detonator are short circuited. The detonator is not adapted to receive electrical power. Upon further rotation of the body relative to the adapter head, the detonator moves from the transport position to an electrical contact position. In this position, the plug is electrically connected to the detonator but the detonator is not aligned with the detonating cord shell. Upon further rotation of the body relative to the adapter head, the detonator moves from the electrical contact position to the armed position. In this position, the plug is electrically connected to the detonator and the detonator is aligned with the detonating cord shell.

Claims19

Dependent claims

A safe arm system adapted for use in association with a perforating apparatus, comprising:

a housing including a body and a head threadedly connected to said body, said body being rotatable relative to said head when said head threadedly connects to said body;
a first module disposed within said body including an electrical jack and a detonator electrically connected to said jack;
a second module disposed within said head including a booster, a detonating cord disposed adjacent said booster and adapted for connection to said perforating apparatus, and an electrical plug adapted for connection to a power source and adapted for insertion into said electrical jack when said body rotates relative to said head;
said detonator being rotatable between a transport position, an electric contact position, and an armed position when said body rotates relative to said head.

1 more element

A safe arm apparatus adapted for use in a perforating apparatus, comprising:

a head including a booster adapted to be connected to a detonating cord of said perforating apparatus and an electrical plug;
and
a body threadedly connected to said head and rotatable sequentially between a plurality of rotation positions with respect to said head, said rotation positions including a transport rotation position, an electric contact rotation position, and an armed rotation position, said body including,
electrical jack means for receiving said electrical plug from said head and electrically connecting said plug to said jack means when said body is rotated from said transport rotation position to said electric contact rotation position with respect to said head, and
detonator means electrically connected to said jack means and rotatable with respect to said booster in response to a corresponding rotation of said body with respect to said head for detonating and igniting said booster when siad plug is electrically connected to said jack means and said body including said detonator means is rotated from said electric contact rotation position to said armed rotation position.

2 more elements

Dependencies are inferred from the claim text.

Safe arm system for a perforating apparatus having a transport mode an electric contact mode and an armed mode

Life of this patent

Safe arm system for a perforating apparatus having a transport mode an electric contact mode and an armed mode

Life of this patent

Abstract

Claims19