|
US3933376A
|
|
Removable packer and tesnion slip assembly
|
|
US3323327A
|
|
Cushion drill collar
|
|
US3276266A
|
|
Fluid sampling apparatus
|
|
US3225566A
|
|
Drill string shock absorber
|
|
US3276824A
|
|
Drill string stabilizer
|
|
US3227498A
|
|
Drill pipe protector
|
|
US3128614A
|
|
Drilling head
|
|
US3031742A
|
|
High pressure reciprocating retriever apparatus
|
|
US3016604A
|
|
Valve seat puller
|
|
US2834579A
|
|
Well bore engaging tool
|
|
US2756968A
|
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Expansible well scraper
|
|
US2653474A
|
|
Apparatus for determining well pipe perforations
|
|
US2695771A
|
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Tool for removing material from well bore walls
|
|
US2693239A
|
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Well casing scraper
|
|
US2630300A
|
|
Rotary underreamer
|
|
US2626829A
|
|
Method for hydraulically displacing well materials
|
|
US2626177A
|
|
Tool for hydraulically displacing well materials
|
|
US2588578A
|
|
Vacuum well cleaner
|
|
GB599057A
|
|
Determination of well pipe perforations
|
|
US2449721A
|
|
Bailer unloading rack
|
