The pipes that were planned to be introduced inside the well, to ensure this, did not fit, due to discontinuities in the walls of the gallery. This circumstance forced the rescue teams to drill the tunnel again to widen it. The Spanish authorities received offers from dozens of international companies to collaborate in the search, including the Swedish geolocation firm Stockholm Precision Tools AB, which participated in the rescue of the 33 miners trapped for 69 days in the north of Chile in 2010.[21]