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US1861332A
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Apparatus for applying pressure to oil sands
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US1704776A
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Pump
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US1452580A
|
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Pump
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US1452579A
|
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Pump
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US1258834A
|
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Anchor mechanism.
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US1295243A
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Method of operating oil-wells.
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US1221637A
|
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Air system for forcing liquids.
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US1088491A
|
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Pump-barrel.
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US1097277A
|
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Bottom-hole packer.
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US1097276A
|
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Working barrel for pumps.
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US1060961A
|
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Sucker-rod packing for oil-well tubings.
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|
US1010098A
|
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Working barrel for pumps.
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|
US1014272A
|
|
Wall-packer for oil-wells.
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|
US1014271A
|
|
Deep-well pump.
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|
US997721A
|
|
Cup-packer.
|
|
US961820A
|
|
Pump.
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US910885A
|
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Casing-head.
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