Wells – Processes – Cementing – plugging or consolidating
Patent
1993-11-15
1995-09-26
Suchfield, George A.
Wells
Processes
Cementing, plugging or consolidating
166312, 166 50, E21B 3314, E21B 3316, E21B 3700
Patent
active
054527643
ABSTRACT:
A well completion process for improved cement placement in a horizontal wellbore where dual density cleaning fluids are circulated down the wellbore for conditioning and cleaning it. Afterwards, a production tube containing centralizers is positioned centrally within the wellbore. Next, "spacer fluids" of higher and lower densities are circulated within an annulus formed by the space between the tube and the wellbore so as to more substantially clean the annulus out. Subsequently, a cement having a density greater than the spacer fluid is pumped into the annulus. Thereafter, a light weight cement is pumped into the annulus thereby overriding the heavier cement and removing voids in the annulus resulting in more efficient cement placement.
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Hager Jr. George W.
Malone Charles A.
McKillop Alexander J.
Mobil Oil Corporation
Suchfield George A.
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