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Flameless combustor
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Patent number 6,019,172
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Issue date Feb 1, 2000
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Shell Oil Company
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Scott Lee Wellington
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E21 - EARTH DRILLING MINING
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Flameless combustor
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Patent number 5,899,269
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Issue date May 4, 1999
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Shell Oil Company
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Scott Lee Wellington
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E21 - EARTH DRILLING MINING
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Flameless combustor
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Patent number 5,862,858
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Issue date Jan 26, 1999
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Shell Oil Company
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Scott Lee Wellington
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E21 - EARTH DRILLING MINING
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Oil recovery process
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Patent number 5,392,854
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Issue date Feb 28, 1995
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Shell Oil Company
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Harold J. Vinegar
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E21 - EARTH DRILLING MINING
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Oil recovery process
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Patent number 5,297,626
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Issue date Mar 29, 1994
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Shell Oil Company
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Harold J. Vinegar
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E21 - EARTH DRILLING MINING
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Heat injection process
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Patent number 5,255,742
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Issue date Oct 26, 1993
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Shell Oil Company
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Thomas Mikus
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E21 - EARTH DRILLING MINING