The child of a farm labourer slipped into the borewell, located in an agricultural field in the district's Ekkareddyguda village, at around 7:15 PM on Thursday while she was playing with her elder sister.
According to a revenue department official, the land owner had apparently kept the borewell open to fix a motor.
Police said the rescue operation was briefly affected due to rains this afternoon.
"Despite rains, digging work is going on and we have reached a depth of 22 feet. Due to rains and the rocky terrain, there is slow progress (on digging). We will first go up to 40 feet," he said.
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Shandilya said the girl who was visible from atop yesterday, is not visible now.
"The kid is not visible now...Anyhow we will continue with the rescue operation till we locate her," he said.
Telangana Transport Minister P Mahendar Reddy, who has been supervising the rescue operations since last night, said authorities from different departments were making all efforts to extricate the child.
He expressed hope that the rescue operation will be over in another seven hours.
Authorities involved in the operation had used a robotic equipment to reach the girl.
"Efforts are on to save the girl...Oxygen is being supplied into the borewell," Chevella police station sub-inspector, N Sridhar Reddy told PTI.
In October 2014, a four-year-old girl died after accidentally falling into a 300 feet-deep borewell at Manchal village in Telangana's Ranga Reddy district.
The police and officials from different departments had then carried out a massive operation for three days to save the child, but the girl's decomposed body was later located at a depth of 45 feet.