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Spacer fluids
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Patent number 5,113,943
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Issue date May 19, 1992
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Atlantic Richfield Company
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William N. Wilson
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Cementing oil and gas wells
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Patent number 5,076,852
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Issue date Dec 31, 1991
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Atlantic Richfield Company
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James B. Bloys
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Cementing oil and gas wells
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Patent number 5,038,863
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Issue date Aug 13, 1991
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Altantic Richfield Company
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James B. Bloys
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Spacer fluids
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Patent number 5,030,366
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Issue date Jul 9, 1991
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Atlantic Richfield Company
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William N. Wilson
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES