There is no greater nightmare for a farmer than a brand new submersible pump getting jammed two hundred feet underground or dropping down due to a sheared column pipe. Instead of abandoning the borewell and losing heavy drilling capital, they call a borewell retrieval specialist. You build an arsenal of specialized rescue gear including overshot spears, casing scrapers, spiral fishing taps, heavy duty winches, and an underwater borehole camera with depth indicators. You arrive at the distressed farm, drop the camera down to visually diagnose the obstruction on a monitor, and clamp the matching fishing tool.
Hooking and hauling out an expensive pump and motor saves the farmer massive expenditure, justifying very handsome service charges. Very few people have the nerve and tools for this delicate salvage trade.