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US3766978A
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Remote controlled oil well pipe shear and shut-off apparatus
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US3590920A
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Remote-controlled oil well pipe shear and shutoff apparatus
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US3510153A
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Universal connecting joint
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US3458083A
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Safety closure device
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US3437149A
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Cable feed-through means and method for well head constructions
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US3329221A
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Pressure balanced bumper sub
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US3387851A
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Tandem stripper sealing apparatus
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US3434729A
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Ram assembly
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FR1380079A
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Oil well blowout valve
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US3242826A
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Locking device for a fluid operated rod
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US3378281A
|
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Universal connecting joint
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US3323773A
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Blow-out preventer
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US3281112A
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Ball valve for high pressures
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US3239017A
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Hydraulic trip control
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US3241864A
|
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Automatic connector
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US3195640A
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Bit guide setting tool
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US3204992A
|
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Rotary safety joint
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US3187775A
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Flow bean
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FR1258168A
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Advanced valve
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GB875914A
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Hydraulic control gate
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