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Horizontal drilling
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Patent number 7,404,439
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Issue date Jul 29, 2008
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Frank J. Schuh, Inc.
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Frank J. Schuh
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E21 - EARTH DRILLING MINING
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Multi-zone profile control
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Patent number 6,070,663
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Issue date Jun 6, 2000
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Shell Oil Company
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Edward Paul Cernocky
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E21 - EARTH DRILLING MINING
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Development well drilling
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Patent number 4,773,488
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Issue date Sep 27, 1988
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Atlantic Richfield Company
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Larry N. Bell
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E21 - EARTH DRILLING MINING
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Subsea wellhead apparatus
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Patent number 4,632,188
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Issue date Dec 30, 1986
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Atlantic Richfield Company
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Frank J. Schuh
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E21 - EARTH DRILLING MINING
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Drainhole drilling assembly
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Patent number 4,629,012
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Issue date Dec 16, 1986
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Atlantic Richfield Company
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Frank J. Schuh
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E21 - EARTH DRILLING MINING
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Well drilling
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Patent number 4,621,691
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Issue date Nov 11, 1986
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Atlantic Richfield Company
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Frank J. Schuh
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E21 - EARTH DRILLING MINING
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Drainhole drilling
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Patent number 4,519,463
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Issue date May 28, 1985
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Atlantic Richfield Company
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Frank J. Schuh
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E21 - EARTH DRILLING MINING
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Underwater wellhead testing
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Patent number 4,096,737
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Issue date Jun 27, 1978
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Atlantic Richfield Company
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Frank J. Schuh
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E21 - EARTH DRILLING MINING
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