Wells – Processes – Placing fluid into the formation
Reexamination Certificate
2006-10-31
2006-10-31
Tsay, Frank (Department: 3672)
Wells
Processes
Placing fluid into the formation
C166S297000, C166S115000
Reexamination Certificate
active
07128157
ABSTRACT:
The present invention generally relates to a method and an apparatus for stimulating the production of an existing well. In one aspect, a method of treating a well is provided. The method includes inserting a selective treatment assembly and a plug assembly into a partially lined wellbore until the selective treatment assembly is positioned proximate an area of interest. Thereafter, the selective treatment assembly is activated to isolate and treat the area of interest. Next, the selective treatment assembly is deactivated and urged toward the surface of the well until the plug assembly is seated in a polished bore receptacle disposed in a string of casing. At this point, the treated portion of the wellbore is separated from the untreated portion. Thereafter, the pressure in the untreated portion of the wellbore is equalized with the surface of the well and then the selective treatment assembly is removed from the wellbore while the plug assembly remains in the polished bore receptacle. Next, a string of production tubing is disposed in the wellbore and attached to the polished bore receptacle. The plug assembly is then removed from the polished bore receptacle and the well is produced. In another aspect an apparatus for treating a portion of a wellbore is provided.
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EP Search Report, Application No. EP 04103216, dated Feb. 2, 2005.
Hoffman Corey E.
Murphy Robert
Tsay Frank
Weatherford / Lamb, Inc.
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