Patent ID: 7905291

Claim:
A method of cleaning a well, comprising: providing an apparatus, comprising a tubular conveyance for extending from the surface into a borehole to a region to be cleaned; a motor mounted at the end of the tubular conveyance that in use is introduced into the borehole; a pump connected to the motor and having a nozzle; and a power cable extending through the tubular conveyance from the surface to provide power to the motor; the pump being arranged such that, when positioned in the borehole and operated by the motor, the pump withdraws material from the borehole through the nozzle and pumps it into the tubular conveyance to the surface; extending the tubular conveyance into the borehole so as to position the nozzle in a region to be cleaned; operating the pump so as to draw fluid and solid material from the region and pump them to the surface through the tubular conveyance; and one of rotating and reciprocating the nozzle while operating the pump.