Hi!

3 years back, at my residence we drilled a bore well of about 110 feet deep. Last week one fine day the motor was not able to deliver water,  I checked with the plumber and he said the hose in the borewell has to be checked for leaks. He tried to remove the same, but unfortunately it did not come out as it got buried in mud.
I even tried with the borewell company, they also flushed the borewell but still the hose refused to come out. The bore well company said that the casing was not properly inserted till the rock surface, due to which mud has filled within the bore.

Please let me know whether the reason provided by the borewell company is correct.
Also can I drill in the same location (Do note that casing pipe, hose with rope are still inside the bore & the motor used is 1hp jet motor) ?

Existing borewell size: 41/2 inch 110 ft deep with 1 hp jet motor outside, and I had used hose for both air and water.

Proposed by borewell company: 6 inch bore

Also please note that I have rain water harvesting pit that collects terrace water nearby the borewell (3 feet away). Also let me know whether this could affect the bore well? If so what are the precautionary measures I need to take before reboring at the same location.

Thanks in advance.