Method and system for cleaning a well bore

A method for extracting accumulated material from a well bore, comprising:

• pressurizing gas recovered from the well bore;
• disposing an extraction string in communication with a sump, wherein the sump is disposed to receive liquid from the well bore;
• sealing the sump;
• and
• injecting at least a portion of the pressurized gas into the sump such that at least some of the liquid in the sump is driven upward into the extraction string.

A system, comprising:

• a compressor operable to pressurize gas recovered from a well bore;
• a sump disposed to collect liquid from the well bore, wherein the sump comprises at least one cavity portion drilled transversely to the drilling direction of the sump;
• a packer coupled to the compressor, the packer operable to be inflated using at least a portion of the pressurized gas, wherein the packer, when inflated, seals the sump such that the sump is substantially airtight;
• a gas injection string in communication with the sump and coupled to the compressor, the gas injection string operable to inject pressurized gas into the sump;
• and
• an extraction string surrounding the gas injection string so as to define an annular space between the extraction string and the gas injection string, wherein liquid from the sump is driven upward into the annular space when the pressurized gas is injected into the sump, the extraction string comprising a flared end flared inwardly in order to prevent debris from entering the annular space.