"Efforts are on to rescue him," Bagalkot Deputy Commissioner P A Meghannavar said.
Tipanna Hatti fell into the 300-feet borewell in his father's sugarcane field while he had gone there with his 12-year-old cousin at around 2.15 pm, Meghannavar said.
Special rescue teams from Hatti Gold Mines have been sought by the district administration to expedite the efforts to rescue him, he said.
The boy is at a depth of 150 feet and rescuers are trying to gain access, he said, adding, at present two earth removal machines are being engaged in the operation.
District Incharge Minister S R Patil is also camping at the site, supervising the rescue operations.
On June 17, a four-year-old girl had fallen into an open borewell at Nagathana village, near Bijapur and she was found dead after a 50-hour-long rescue operation.