The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 1980
Filed:
Apr. 04, 1979
Applicant:
Inventors:
Paul H Javora, Houston, TX (US);
Bethel Q Green, Houston, TX (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07G / ; C09K / ;
U.S. Cl.
CPC ...
2601 / ; 252 / ; 252 / ;
Abstract
A drilling fluid additive effective as a viscosity controlling agent is composed of complex titanium or zirconium lignosulfonates and/or salts of lignosulfonic acid. Alternatively, the additive may be a titanium-iron lignosulfonate and/or salt or lignosulfonic acid or a zirconium-iron lignosulfonate and/or salt of lignosulfonic acid. The additive is effective with the lignin component of the lignosulfonate being in either oxidized or unoxidized form.