Patent ID: 7011157

Claim:
A method for cleaning an interval of a well having a casing, comprising: with a tubing conveyed straddle tool having spaced packer elements positioned within the well casing establishing an annular interval between the spaced packer elements and between the straddle tool and the casing, causing a flow of clean fluid through the tubing and said straddle tool into an upper portion of the annular interval via an outlet port of said straddle tool and thence from a lower portion of the annular interval into the straddle tool via an inlet port located below said outlet port; at a fluid flow rate above a predetermined flow rate, blocking the flow of fluid into the casing below said spaced packer elements and permitting fluid pressurization of the annular interval for formation interval treatment; and at a fluid flow rate up to the predetermined flow rate, directing fluid flow through said inlet port into the well casing below said spaced packer elements.