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US1832323A
|
|
Combination sand-pump and bailer
|
|
US1821479A
|
|
Head device for sand pumps and bailers
|
|
US1462518A
|
|
Oil saver
|
|
US1357475A
|
|
Sucker-rod
|
|
US1250509A
|
|
Sucker-rod joint.
|
|
US1152549A
|
|
Oil-saver.
|
|
US1158292A
|
|
Combination sand-pump and bailer.
|
|
US1152548A
|
|
Oil-saver.
|
|
US1105340A
|
|
Combination casing-head and oil-saver.
|
|
US1159096A
|
|
Clamp for well-drilling cables.
|
|
US1120539A
|
|
Manufacture of rope-clamps for well-drilling cables.
|
|
US1157582A
|
|
Driving-gearing for well-drilling apparatus.
|
|
US1142120A
|
|
Clutch and clutch-actuating means.
|
|
CA136322A
|
|
Oiler
|
|
US983314A
|
|
Oil-saver.
|
|
US854239A
|
|
Hydraulic packing.
|
|
US873090A
|
|
Clamp for well-drilling cables.
|
|
US798449A
|
|
Well-drilling apparatus.
|
|
US703832A
|
|
Casing-head.
|
|
US696749A
|
|
Guide for oil-well-pump rods.
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