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:
Jun. 10, 1986
Filed:
Dec. 06, 1984
Applicant:
Inventors:
Yoshizi Saito, Gunma, JP;
Masaru Nakamura, Gunma, JP;
Toyoshi Iida, Gunma, JP;
Tsugunori Honda, Ichikawa, JP;
Assignee:
Japan Metals and Chemicals Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
252 / ; 252 / ; 530506 ; 556 28 ;
Abstract
Drilling fluid additives are prepared by complexing humic acids and/or lignins, with three compounds of zirconium, nickel and iron. The metal composition of the additives is 1.3 to 2.5% of zirconium, 0.8 to 1.5% of nickel and 0.8 to 1.5% of iron, and is totally 3.0 to 5.5%. Thus, the drilling fluid additives, containing no chromium, can be used in wide temperature range for the drilling of oil, geothermal or gas wells with less gelation even by various contamination and cause no serious environmental pollution.