4. Boring or penetrating the earth
  5. Bit or bit element
  6. Rolling cutter bit or rolling cutter bit element
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Butland Richard

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Buzdov Ruslan D.

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Byrd Chris S.

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Byrd Christopher S.

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Camco Drilling Group Limited of Hycalog

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Camco Drilling Group Ltd. of Hycalog

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Camco International (UK) Limited

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Camco International Inc.

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Campbell Ronald R.

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Campos, Jr. Harry M.

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Cannon Randon S.

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Caraway Douglas

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Carwile Billy L.

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Castle Jack

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Cawthorne Chris E.

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Ccore Technology & Licensing Limited, A Texas Limited Partnershi

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Centala Prabhakaran K.

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Cepeda Karlos B.

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Charles Christopher Steven

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Chavez Javier

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