Primer delivery systems and methods
AssigneeDyno Nobel Asia Pacific Pty Limited
InventorPaul Terry
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Abstract
The present disclosure describes systems and methods for delivering a primer to an operative depth for initiating an explosion of an explosive material in a blasthole. Systems described herein can include a cap structure providing access into the hole and a separable detonator subassembly that can be deployed to convey a detonator to a priming position. Methods of priming a blasthole can include placing such a system on a blasthole collar and deploying the detonator subassembly in conjunction with loading the blasthole with explosive material.
Claims20
A system for priming a blasthole, comprising:
- a cap comprising:
- a cap body having a top side, a bottom side, and a spool chamber disposed therein;
- an aperture centrally placed with respect to the spool chamber and which penetrates the bottom side;
- and
- a hollow guide tube axially aligned with and in communication with the aperture, and having an upper end secured to the bottom side of the cap body and a lower end opposite the upper end;
- and
- a detonator subassembly comprising a detonator holder configured to secure a detonator in a priming orientation, and having an undeployed state and a deployed state,
- wherein in the undeployed state the detonator holder is removably secured to the lower end of the guide tube and in the deployed state the detonator holder is separated from the guide tube.
A system for priming a blasthole, comprising:
- a cap comprising:
- a cap body having a top side, a bottom side, and a spool chamber disposed therein;
- an aperture centrally placed with respect to the spool chamber and which penetrates the bottom side;
- and
- a hollow guide tube axially aligned with and in communication with the aperture, and having an upper end secured to the bottom side of the cap body and a lower end opposite the upper end such that the guide tube extends outwardly of the cap body from the bottom side;
- and
- a detonator subassembly comprising a detonator holder configured to secure a detonator in a priming orientation, and having an undeployed state and a deployed state,
- wherein in the undeployed state the detonator holder is removably secured to the lower end of the guide tube and in the deployed state the detonator holder is separated from the guide tube.
Dependencies are inferred from the claim text.