After several attempts to recover the drill bit by the use of 2 different types of magnets, Stangeland Maskin contacted Innovar to assess if we were in possession of a more suitable magnet that could deal with the challenge. Innovar recommended Stangeland to use an 8,3" Magnum Fishing Magnet with a lifting capacity of 1,100 kg.
To ensure the best possible contact between the magnet and the drill bit, Stangeland Maskin first went down the hole with a blower tube connected to a compressor and cleansed the hole thoroughly. The magnet was then lowered into the borehole until they hit the drill bit. Stangeland quickly registered when the magnet got in touch with the drill bit and then started to pull the magnet out of the hole. Both the magnet and the drill bit followed to the surface on the first run.
The drill bit was recovered on the first run by the use of the 8,3" Magnum Fishing Magnet, allowing Stangeland Maskin to resume their work without further complications. The total duration of the operation was less than 3 hours. This quick fishing operation reduced the down time for the contractor.
"We can say that the operation was very successful.
Many thanks to Innovar for good advice and rental of proper equipment."
Per Gunnar Skårland
Stangeland Maskin AS
To read more about Midtfjellet Vindpark, please visit http://midtfjellet.no/