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US5695131A
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Shredder separator
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CA989302A
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Well pipe valve
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US3776258A
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Well pipe valve
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US3770054A
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Apparatus for causing an impact force on the interior of a well pipe
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US3608632A
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Well pipe hanger
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US3575239A
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Progressive centralizer
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US3557875A
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Method and apparatus for vibrating and cementing a well casing
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US3661209A
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Method for compactly placing material in a well
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US3566965A
|
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Variable size,multi-hinge centralizer
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US3421586A
|
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Flow-reversing liner shoe for well gravel packing apparatus
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US3428219A
|
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Well gravel packing apparatus
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US3343608A
|
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Two-stage centralizer
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US3385368A
|
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Cement basket and method for constructing same
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US3424245A
|
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Well tool
|
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US3358768A
|
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Cement basket
|
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US3366182A
|
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Well tool for releasing liner hangers and the like
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US3240274A
|
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Flexible turbulence device for well pipe
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US3285345A
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Liner hanger
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US3200884A
|
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Close tolerance centralizer with interconnecting stop collar
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US3213943A
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Construction for turbulence generating well device
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