Mar 10, 2026

US12571621 - Detonator assembly placement

A device which is used to position a detonator assembly in a borehole. The device has a housing with an open mouth into which one end of the detonator assembly is inserted, formations on the housing which then engage with the detonator assembly, and flexible elements which extend from the housing and which are configured, in use, to engage with a wall of a borehole into which the device and the detonator assembly are inserted.

Assignee: DETNET SOUTH AFRICA (PTY) LTD
Inventors: Marius Christo Botha, Abraham Johannes Liebenberg
Filing date: 2022-09-26

detonatorboreholeexplosives

The patent describes a device designed to accurately position a detonator assembly within a borehole, featuring a housing that retains the assembly while allowing part of it to extend outside. It includes flexible elements that engage the borehole wall, ensuring stability during insertion and operation.

Claim 1

1 . A device for positioning a detonator assembly in a borehole wherein the detonator assembly includes an elongate body with a first end and an opposed second end, the device comprising a housing, a volume inside the housing with a central axis, a mouth on the housing through which the first end of the body is insertable into the volume, at least one formation on the housing configured to engage with the first end of the body thereby to retain the first end inside the volume and leave a portion of the body including the second end outside the volume, wherein the housing includes a wall with a plurality of apertures which are evenly spaced from one another in a circumferential sense extending around the central axis and wherein at a lower end of each aperture the wall includes a number of recessed formations and a plurality of retention members, each of which includes a respective base which is engageable with a respective one of the recessed formations on the housing, and at least one elongate flexible element which extends from each respective base radially outwardly relative to each base and at an acute angle relative to the central axis.

Google Patents

https://patents.google.com/patent/US12571621

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12571621