Inspired by “No-dig-challenge” issued by Norwegian municipality in 2014, Hawle NoDig system becomes the first trenchless solution for establishing water house connections.
In early 2014, when Norwegian municipality came up with the concept of ‘no-dig-challenge’, it has made the market players to innovate in areas that has remained undiscovered for a long time resulting in the inception of Hawle NoDig system.
Hawle water technology Norge AS identified the need for a system to form trenchless house connections and have relentlessly worked on developing the system which later was announced as the winner of the challenge for development of Hawle NoDig system. It was also recognized as a top 5 finalist for the Norwegian Tech Awards in 2017.
For Hawle, it hasn’t been easy to get started, considering the number of components it needs to have for a significant progress in their development which made them deploy majority of the research and development team to Norwegian product development company Techni, while Hawle holds the ownership of technology and the IP.
It took around 45,000 hours for the research and development team to come up with a viable product which was successfully demonstrated onsite in 2017 and a number of patent families were filed.
The output of the system eventually is capable of locating the main water pipe, drill it from a building’s basement to establish the connection using remote controlled robot technology without having the need of digging.
A gyro-based pipe logger is used to determine the position and location of the water main pipe.
“A drill string features a retractable drill head, an integrated flushing system, a propulsion and directional steering unit and pull back module. The drill head is driven by a compact purpose-built hydraulic motor and an integrated sensor system allows precision drilling, while a braided sleeve minimises friction.”
“The system also comprises a multitool that, among other things, can remove obstacles and aid in drilling a pilot hole to the main water pipe. This facilitates the positioning of the pipe robot from within the main water pipe.”
“A pipe robot is used to locate and enlarge the pilot hole before it mounts a special fitting into the main pipe in one operation. A connection tool is used to join the house connection pipe from inside the sleeve pipe onto the fitting established by the pipe robot. It also has the ability to compensate any alignment deviations.”
Source: Trenchless International.com
Though after addressing the primary no-dig-challenge, the trenchless techniques that are available for installing or replacing water mains still require a key hole or a pit to be constructed for connecting the service pipe at which it becomes a semi trench solution.
Open trench methods are still in use because of the fact that, even a semi trench method needs a key hole or a pit that still can cause a significant disruption to traffic.
But, with Hawle NoDig system, it is entirely trenchless which got tested and approved by large public water supplier. As an add-on, Hawle is also capable of limiting water loss during the transition phase.
After the successful demonstration of the pilot project, Hawle water technology is looking to expand its services across for a trenchless water house connection.