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Wellbore casing repair
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Patent number 7,048,067
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Issue date May 23, 2006
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Shell Oil Company
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Robert Lance Cook
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E21 - EARTH DRILLING MINING
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Alumina wellbore cement composition
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Patent number 5,488,991
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Issue date Feb 6, 1996
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Shell Oil Company
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Kenneth M. Cowan
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Wellbore cementing method
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Patent number 5,335,725
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Issue date Aug 9, 1994
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Shell Oil Company
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Reece E. Wyant
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Blast furnace slag spacer
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Patent number 5,316,083
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Issue date May 31, 1994
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Shell Oil Company
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James J. W. Nahm
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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