4. Boring or penetrating the earth
  5. With above-ground means for handling drilling fluid or cutting
  6. Fluid or cuttings directing or receiving means engaging bore...
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Maier Jerry A.

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Muller-Boysen Ulrich

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Perri Michael J.

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Repski Roman

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Schmidt David Anthony

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Schmidt Robert Frank

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Sides Daniel Harrison

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Sigg Horst

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Sikes Jared A.

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Sims Donald Glynn

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Sims Michael James

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Stabilator AB

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Stauffer Chemical Company of Wyoming

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Swartout Matt

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Swartout Matthew K.

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VOEST-ALPINE Bergetechnik Gesellschaft m.b.H.

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Ward, Sr. Bobby N.

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Warren William P.

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Weinberger Gerhard

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Zumwalt Glen A.

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