Sandvik has launched a new multifunctional surface and underground (NSU) core barrel system for core drilling.
According to the manufacturer this system is the first of its kind to have interchangeable components, as well as a standard and pump-in applications, in a single system.
The company added that as the parts are interchangeable it reduces networking capital and spare parts inventory.
“Our iQ-FCV valve provides and maintains a constant alert via sustained high water pressure, assuring the operator that the inner tube assembly has positively latched into the core barrel, eliminating mislatches and ensuring valuable time is not lost,” Sandvik Mining's core drilling product line manager Chris Daws said.
“For better water efficiency, the iQ-FCV has been designed to always retain the volume of water in the drill string even in broken ground or dry holes – an important benefit in core drilling.”
The overshot attachment to the wireline also no longer requires cable eyes or cable splicing, allowing easier maintenance and field repairs.
A logic tip on the overshot allows for in-hole dry releasing of the inner tube assembly once the water level has been reached, shortening release times.
The pump-in overshot also features a ball valve indicator that alerts the operator of positive latching onto the core barrel's back end.
This means a reduced potential of hand injuries for drilling crews.
"Our ‘intelligent’ overshot design is automatically latch-locking, while latches can be released without operators having to use fingers in potentially high-risk areas,” Daws said.
For the more confined underground mining sector, a knuckle joint on the overshot ensures easier handling, while load rated breakaway safety pins also allow for a safer way to release the overshot from stuck inner tubes.
“The Sandvik NSU – along with our forthcoming HSU (H surface and underground) – core barrel systems have a high commonality of components used in the core barrel head assembly,” Daws said.
“With this interchangeable design for both systems, the NSU core barrel head assembly can easily be converted into an HSU core barrel head assembly, and vice versa.”
“This will significantly reduce parts and spare parts inventory.”
The HSU system will be released later this year.