Apparatus for determining the wall building properties of well drilling fluids
United States Patent 2443781
US Patent References:
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/0762396.html
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Inventors:
Zacher, Vernon B.
Publication Date:
06/22/1948
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Assignee:
Zacher, Vernon B.
Primary Class:
100/99
Other Classes:
210/445, 100/247, 73/76, 100/289, 73/866, 210/250, 100/125, 100/211, 73/784, 73/38
International Classes:
E21B21/06; E21B21/00
US Patent References:
1988468Extractor
2056370Device for radioactive impregnation of materials
2138141Method and apparatus for testing materials
2343113Treating drilling muds
Foreign References:
FR436123A
GB173308A
GB341740A
GB370984A