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Consolidation Coal Company |
Wire communications channel for a pair of unitized augers
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1975-06-09 |
1977-08-09 |
Smith International, Inc. |
Drill director
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1977-08-09 |
Smith International, Inc. |
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Rockwell International Corporation |
Self-propelled deep well turbine drill
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1978-03-30 |
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Continental Oil Company |
Push drill guidance indication apparatus
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1978-06-20 |
1980-01-29 |
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Well perforating tool
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1978-07-24 |
1983-02-22 |
Institut Francais Du Petrole |
Crank connector for directional drilling
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1982-06-30 |
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Raccord coude a angle variable pour forages diriges.
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1979-04-06 |
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Inst Francais Du Petrole |
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Method and apparatus for preventing wireline kinking in a directional drilling system
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Conoco Inc. |
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1984-08-03 |
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Hydril Company |
Method and apparatus for forming boreholes
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1984-08-03 |
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Hydril Company |
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Drilling system
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