I heard about rigs which can also dig or remove mud from open wells, but have not got any credible leads to find a vendor. If any member has used or visited such machine or well, please share your inputs. I have an open well which needs to be cleared with mud and cannot pursue it manually as well side walls have become soft and is now risky.
In a two weeks we are starting in our open well removing fall down mud in Yrragudipadu chimakurthy mandal u can find out location in google maps search “yrragudipadu andhra pradesh”
As u had mentioned u fear for digging an open well further, Manually, as your well Side walls have become soft & as such it is risky to pursue manually,
I would suggest that, If have a good sustainable yield from your existing open Well, u can, Install the Round shape precast RCC rings of 3ft / 4ft diameter as per the Diameter / Width & Length of the Open Well, with the round stone aggregate around the Rings upto the Static / Stayable Water Level in your well. & Place a screened / slotted PVC pipe submerged into the water bearing zone & plain above, Just like a Straw in the Glass (refer to the attached image).
This would save u any risky expenditure, because, as your well walls are in collapsable condition, further excavating or cleaning will yield you nothing, as it would again get refilled when walls collapse.
May u have any further queries? plz do not hesitate.