Self-shunting detonator for well perforating gun
AssigneeHalliburton Energy Services, Inc.
InventorsKevin C. Cook, Matthew Craig Mlcak, Joseph Todd MacGillivray, Stuart Michael Wood
Life of this patent
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Abstract
Various well-perforating systems and methods are disclosed incorporating a self-shunting detonator. The detonator may include an electrically-conductive detonator body. A resistor initiator inside the detonator body includes first and second leads. A grounding element inside the detonator body couples the detonator body to the first lead. An electrically-conductive clip coupled to the second lead includes an arm biased to electrical contact with an external surface of the detonator body to shunt the detonator. The arm is moveable away from the detonator body to un-shunt the detonator, such as automatically in response to insertion into a detonator housing.
Claims16
A detonator for a perforating gun, the detonator comprising:
- an electrically-conductive detonator body;
- a resistor initiator inside the detonator body;
- a grounding element inside the detonator body coupling the detonator body to a first lead of the resistor initiator;
- an electrically-conductive clip having an interior portion coupled to a second lead of the resistor initiator inside the detonator body and an arm biased to electrical contact with an external surface of the detonator body to shunt the detonator,
- wherein the arm is moveable away from the detonator body to un-shunt the detonator, and
- an insulator cap closing an end of the detonator body, wherein the clip extends through the insulator cap to the resistor initiator;
- wherein the electrically-conductive clip is a unitary structure from the arm to an end where the clip is coupled to the second lead of the resistor initiator, and
- wherein the electrically-conductive clip comprises a straight section that extends from the resistor initiator to where it exits the detonator body through the insulator cap and a first bend to route the electrically-conductive clip from the insulator cap, and a second bend to route the arm of the electrically-conductive clip back toward the external surface of the detonator body, where the electrically-conductive clip electrically contacts the detonator body.
A well-perforating system, comprising:
- a charge carrier for removably carrying a plurality of perforating charges;
- a detonator housing securable to an end of the charge carrier and including a detonator receptacle;
- and
- a detonator including
- an electrically-conductive detonator body receivable within the detonator receptacle of the detonator housing,
- a resistor initiator inside the detonator body,
- a grounding element inside the detonator body coupling the detonator body to a first lead of the resistor initiator,
- an electrically-conductive clip electrically coupled to a second lead of the resistor initiator inside the detonator body and including an arm biased toward electrical contact with an external surface of the detonator body to shunt the detonator, wherein the arm is moveable away from the detonator body to un-shunt the detonator;
- and
- an insulator cap closing an end of the detonator body, wherein the electrically-conductive clip extends through the insulator cap to the resistor initiator,
- wherein the electrically-conductive clip is a unitary structure from the arm to an end where the clip is coupled to the second lead of the resistor initiator, and
- wherein the electrically-conductive clip comprises a straight section that extends from the resistor initiator to where it exits the detonator body through the insulator cap and a first bend to route the electrically-conductive clip from the insulator cap, and a second bend to route the arm of the electrically-conductive clip back toward the external surface of the detonator body, where the electrically-conductive clip electrically contacts the detonator body.
Dependencies are inferred from the claim text.