Wells – Processes – Cleaning or unloading well
Reexamination Certificate
2006-03-14
2006-03-14
Gay, Jennifer H (Department: 3672)
Wells
Processes
Cleaning or unloading well
C166S186000, C166S191000, C166S202000, C166S386000
Reexamination Certificate
active
07011157
ABSTRACT:
A method and apparatus for fluid treatment of a selected interval of a well and then cleaning the selected interval and the apparatus of treatment residue. An straddle tool is run into the well to treatment depth on fluid supplying tubing and has upper and lower packers that establish sealing with the casing and define an annular interval between the packers and between the tool and casing. Fluid, such as fracturing fluid, is pumped through the tubing to the tool and is diverted through an outlet port of the tool into an upper portion of the annular interval. Fluid then flows from a lower portion of the annular interval through an inlet port below the outlet port and at low flow rate is dumped into the casing through a pressure responsive dump valve. The outlet port and inlet port are located to accomplish cleaning of residue from the packers.
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Costley James M.
Eslinger David M.
McKee L. Michael
Sheffield Randolph J.
Cate David
Curington Tim
Gay Jennifer H
Kenak Wayne
Schlumberger Technology Corporation
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