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Catcher device for a downhole tool
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Patent number 11,332,990
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Issue date May 17, 2022
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Schoeller-Bleckmann Oilfield Equipment AG
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Nathan Strilchuk
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E21 - EARTH DRILLING MINING
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Splitflow valve and method of use
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Patent number 10,815,754
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Issue date Oct 27, 2020
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Schoeller-Bleckmann Oilfield Equipment AG
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Richard Earle
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E21 - EARTH DRILLING MINING
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Drillstring valve
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Patent number 9,617,812
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Issue date Apr 11, 2017
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Schoeller-Bleckmann Oilfield Equipment AG
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Paul Bernard Lee
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E21 - EARTH DRILLING MINING
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Drill pipe
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Patent number 6,167,917
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Issue date Jan 2, 2001
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Schoeller Bleckmann Oilfield Equipment Limited
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William Russell Scott Aitken
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E21 - EARTH DRILLING MINING