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GB1139908A
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Well bore drilling apparatus
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GB1140257A
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Resilient unit for earth boring drill strings
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US3355192A
|
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Threaded connections
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US3306379A
|
|
Roller reamer
|
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US3326305A
|
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Drill bit control apparatus
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US3303900A
|
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Bore control device
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US3232186A
|
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Piston and rod
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|
US3302983A
|
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Stabilizer
|
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US3306381A
|
|
Reaming apparatus
|
|
US3298449A
|
|
Well bore apparatus
|
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US3254508A
|
|
Resilient unit for drill strings
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US3172341A
|
|
Expansible chamber
|
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GB991460A
|
|
Torque-transmitting rotary drive fluid conduit connection
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US3099918A
|
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Resilient rotary drive fluid conduit
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US3033011A
|
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Resilient rotary drive fluid conduit connection
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GB851036A
|
|
Drill collar stabilizer
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US3063759A
|
|
Drill collar stabilizer
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US2953350A
|
|
Orienting apparatus
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US2885225A
|
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Drill pipe coupling having particular thread formations
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