Oil well drilling clay conditioners and method of their preparat

Details Oil well drilling clay conditioners and method of their preparat Oil well drilling clay conditioners and method of their preparat

1982-04-27

1984-07-03

Padgett, Benjamin R.

Compositions

Leather or fur treating

252 85B, 260124R, C09K 702

Patent

active

044578539

ABSTRACT:
Improved drilling fluid additives or conditioners are obtained by oxidation of sulfonated lignin-containing materials with manganese dioxide and boron addition either before or after the oxidation step. The resulting manganese-boron lignosulfonates are more thermally stable and they are rheologically suitable as drilling fluid additives. Additional improvements in thermal stability and rheological properties are realized by complexing the manganese-boron lignosulfonates with a heavy metal cation, notably, iron, preferably used as ferrous sulfate.

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patent: 3448096 (1969-06-01), Read
patent: 3957703 (1976-05-01), Ludwig et al.
patent: 3985667 (1976-10-01), Gray et al.

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