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Drilling with casing
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Patent number 7,334,649
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Issue date Feb 26, 2008
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Halliburton Energy Services, Inc.
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Chen-Kang D. Chen
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E21 - EARTH DRILLING MINING
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Drilling with casing
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Patent number 6,877,570
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Issue date Apr 12, 2005
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Halliburton Energy Services, Inc.
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Chen-Kang D. Chen
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E21 - EARTH DRILLING MINING
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Nonconducting thread lubricant
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Patent number 4,613,443
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Issue date Sep 23, 1986
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NL Industries, Inc.
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M. Vikram Rao
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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