Wells – Processes – Placing fluid into the formation
Reexamination Certificate
2008-04-01
2008-04-01
Thompson, Kenneth (Department: 3672)
Wells
Processes
Placing fluid into the formation
C166S386000, C166S192000, C166S313000
Reexamination Certificate
active
07350578
ABSTRACT:
Zonal isolation of well bores is often desirable for performing downhole operations such as stimulation operations. In certain embodiments, diverter plugs for achieving zonal isolation in a casing string in a well bore may comprise a mandrel having a first end and a second end; a compressible body attached to and surrounding a longitudinal portion of the mandrel; and a sealing nose attached to the first end of the mandrel. In certain embodiments, systems for achieving zonal isolation of a casing string in a well bore may comprise a diverter plug comprising a mandrel having a first end and a second end, a compressible body attached to and surrounding a longitudinal portion of the mandrel, and a sealing nose attached to the first end of the mandrel; and a landing collar sized to mate with a portion of the sealing nose of the diverter plug. Associated methods are also provided.
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Braun Nicholas C.
Burkhead David
Cooper Todd D.
Gilbert William W.
Johnson John
Baker & Botts L.L.P.
ConocoPhillips Company
Halliburton Energy Service,s Inc.
Thompson Kenneth
Wustenberg John W.
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