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 an d 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 ga in 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.
申请公布号
CA2500163(A1)
申请公布日期
2004.04.15
申请号
CA20032500163
申请日期
2003.10.01
申请人
BAKER HUGHES INCORPORATED
发明人
LEWIS, EDWIN K.;HOLT, JAMES H., JR.;CHAPMAN, WALTER R.;KRITZLER, JAMES H.;OSSELBURN, JEFFERY L.