Primary free detonator
AssigneeDynaEnergetics Europe GmbH
InventorsChristian Eitschberger, Sven Krowas, Arash Shahinpour, Fabian Hoss
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Abstract
A non-primary explosive detonator includes an outer shell having a head portion defining a chamber therein, and a body portion extending distally from the head portion. The body portion of the outer shell defines a longitudinally-extending bore therethrough. The detonator further includes a column of deflagrating and detonating material positioned in the bore of the body portion. The bore and the column of deflagrating and detonating material may taper at a distal section thereof. A distal end of the outer shell may define an opening in fluid communication with the bore to allow for combustion to exit via the opening.
Claims20
A detonator of a wellbore tool defining a distal direction in which a detonation propogates and a proximal direction opposite the distal direction, the detonator comprising:
- a detonator shell including:
- a head portion defining a chamber therein;
- and
- a body portion extending distally from the head portion and defining a bore extending therethrough about a central longitudinal axis thereof, the body portion terminating at a distal end defining a distal opening in fluid communication with the bore;
- a column of deflagrating and detonating material positioned in the bore;
- and
- an initiator head assembly positioned in the chamber of the proximal head portion of the detonator shell, wherein the initiator head assembly including:
- an insulative housing;
- and
- a circuit board positioned within the insulative housing.
A low-voltage, non-primary explosive detonator of a perforating gun assembly, the detonator defining a distal direction in which a detonation propogates and a proximal direction opposite the distal direction, the detonator comprising:
- a metal outer shell including:
- a head portion defining a chamber therein;
- and
- a body portion extending distally from the head portion, the body portion defining a bore extending therethrough about a central longitudinal axis, the body portion terminating at a distal end thereof, the distal end configured for the exit of explosive material from the bore, the body portion having a proximal section and a distal section, the distal section defining a tapering section of the bore, a diameter of the tapering section decreasing as the distal section extends in the distal direction;
- and
- a column of deflagrating and detonating material positioned in the bore.
Dependencies are inferred from the claim text.