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:
Oct. 21, 1986
Filed:
Jul. 30, 1984
Applicant:
Inventor:
George M Allison, III, Bartlesville, OK (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
252-8514 ; 252-851 ; 252-8511 ;
Abstract
In an aqueous drilling fluid, an improved thinning effect is obtained by adding a first agent comprising a sulfoalkylated tannin or heavy metal complex thereof, optionally in combination with a lignite, and a second agent comprising a metal compound containing tin, optionally in combination with a metal compound containing nickel or manganese, and wherein said metals can be present in the cation and/or anion portion of said metal compound.