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:
Nov. 15, 1988
Filed:
Sep. 30, 1986
Ahmad Dadgar, Lafayette, IN (US);
Great Lakes Chemical Corp., West Lafayette, IN (US);
Abstract
The present invention relates to corrosion inhibitors which can be used with calcium-free drilling, completion and workover fluids in carbonate or sulfate containing wells. More particularly, the invention relates to the use of sodium, ammonium and/or calcium thiocyanate alone, or in combination with specific aldose group antioxidants, as corrosion inhibitors. Aldose group antioxidants include arabinose, ascorbic acid, isoascorbic acid, gluconic acid, alkali metal, and alkaline earth or other metal ascorbates, isoascorbates and gluconates and mixtures thereof. Additionally, ammonium thioglycolate may be incorporated as a further corrosion inhibitor.