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US3851714A
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Rotary drilling head and method of breaking pipe joints
|
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US3805364A
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Method of mounting cutter inserts in bit bodies and removing the same therefrom
|
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US3693736A
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Cutter insert for rock bits
|
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GB1278127A
|
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Improvements relating to percussion tools
|
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US3485301A
|
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Method of drilling wells in rock
|
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US3583501A
|
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Rock bit with powered gauge cutter
|
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US3583504A
|
|
Gauge cutting bit
|
|
US3503459A
|
|
Percussion drill motor
|
|
US3311177A
|
|
Percussion drilling tool
|
|
US3407711A
|
|
Swab assembly
|
|
US3452778A
|
|
Check valve
|
|
US3357507A
|
|
Percussion bit
|
|
US3388636A
|
|
Percussion drilling tool
|
|
US3387671A
|
|
Percussion tool
|
|
US3195657A
|
|
Percussion drill
|
|
GB1065234A
|
|
Improvements in or relating to slush pumps and pistons thereof
|
|
US3324880A
|
|
Pump valve
|
|
US3229776A
|
|
Impact drilling tool
|
|
US3131611A
|
|
Taper cup back piston
|
|
ES274599A1
|
|
Perfections in oil admission regulators for burners in oil heating (Machine-translation by Google Translate, not legally binding)
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