Wells – Cementing device
Reexamination Certificate
2007-06-12
2007-06-12
Bagnell, David (Department: 3672)
Wells
Cementing device
C166S117500
Reexamination Certificate
active
10676134
ABSTRACT:
Well completion cement may be pumped through a side pocket mandrel that includes parallel rows of filler sections to exclude cement from void space within the side pocket tube. The filler sections are drilled with cross-flow jet channels and surface upsets to stimulate scrubbing turbulence by well working fluid behind a cement wiper plug. The wiper plug includes leading and trailing groups of wiper discs secured to an elongated shaft. The two wiper groups are separated by a distance that permits the leading seal group to gain traction seal before the push seal on the trailing wiper group is lost. A spring centralizer spans a center section of the shaft between the two wiper groups to maintain axial alignment of the shaft as the plug traverses the length of a mandrel.
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Chapman Walter R.
Holt, Jr. James H.
Kritzler James H.
Lewis Keith E.
Osselburn Jeffrey L.
Bagnell David
Baker Hughes Incorporated
Coy Nicole
Madan Mossman & Sriram P.C.
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