Patent ID: 6655461
Filing Date: 2003-12-02
Classification: E21B

Abstract:
A method for conducting fluid treatment of a well having a wellbore and having a well fluid within the wellbore, comprising:running a well treatment tool into the wellbore by tubing for conveying said well treatment tool and for conducting treatment fluid to said well treatment tool, said well treatment tool having a treatment fluid passage in communication with the tubing, spaced sealing members for sealing engagement with the wellbore to define a sealed annulus zone between said spaced sealing members and having at least one treatment port in communication with said treatment fluid passage and being open to said sealed annulus zone, said well treatment tool having at least one fluid bypass passage having a check valve permitting only downward flow of fluid through said fluid bypass passage and having a fluid bypass valve having an open position permitting fluid flow through said fluid bypass passage and a closed position preventing upward fluid flow through said fluid bypass passage; for said running of said well treatment tool, positioning said fluid bypass valve in said open position and displacing well fluid with the well treatment tool and conducting said displaced well fluid through said fluid bypass valve and said fluid bypass passage to the wellbore above the well treatment tool; after positioning of said well treatment tool at a desired depth within the wellbore moving said fluid bypass valve to said closed position and injecting treatment fluid from said treatment fluid passage into said sealed annulus zone for treating the well; and after treatment of the well, when upward movement of the well treatment tool is desired, maintaining said fluid bypass valve in said closed position for draining of well fluid above said well treatment tool through said check valve to the wellbore below said well treatment tool.