Casing cleaning device
United States Patent 3381754
US Patent References:
/0588830.html
- - 0588830

/0608418.html
- - 0608418

Centrifugal chiseling implement
- - 1370767

Rotary excavator
- - 2085336

Chained-head auger
- - 2181306


Inventors:
Tompkins, William S.
Publication Date:
05/07/1968
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Primary Class:
166/170
Other Classes:
166/66.400, 166/241.500, 15/104.140
International Classes:
E21B37/02; E21B37/00
US Patent References:
2187845Clean-out tool
2201680Interior pipe cleaner
2609182Apparatus for drilling deep wells