| 摘要 |
A tool for use in the treatment of a formation penetrated by a well bore, th e tool comprising a tubular core having at least one opening therein for the discharge of pressurized fluid from within the core first and second axially spaced apart sealing members disposed on the core for sealing between the core and the welt bore, the at least one opening in the core being located between the first and second sealing members; and a third sealing member disposed downhole relative to the first and second sealing members for sealing between the tool and the well bore.
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