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US4273520A
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Deep well pump
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US4261427A
|
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Long stroke jar bumper sub with safety sleeve
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CA1068253A
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Drilling shock sub
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CA1068254A
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Optional up-blow, down-blow jar tool
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CA1028944A
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Polymer energy storage element
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US3980146A
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Fishing tool energizer and polymer energy storage element embodied therein
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CA989382A
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Duplex hydraulic-mechanical jar tool
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US3889766A
|
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Deep well drilling jar
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US3539025A
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Apparatus for the sumultaneous application to an oil well fish of the direct strain of a drill string and an independent jarring blow
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US3539026A
|
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Fishing tool energizer
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US3551012A
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Rod shock absorber
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US3485297A
|
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Automatic self-setting slip-type steam packer
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US3472326A
|
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Fishing tool energizer
|
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US3275354A
|
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Rod coupler
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US3220354A
|
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Deep well pump for viscous oil
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US3187680A
|
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Deep well pump for viscous oil
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US3148629A
|
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Deep well pump for viscous oil
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US3219373A
|
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Rod coupler
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US3143080A
|
|
Deep well pump for viscous oil
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US3175512A
|
|
Deep well pump for viscous oil
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