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:
Aug. 02, 1977
Filed:
Jun. 30, 1976
Applicant:
Inventors:
Paul W Fischer, Whittier, CA (US);
Horst E Zilch, Yorba Linda, CA (US);
Assignee:
Union Oil Company of California, Brea, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C02B / ;
U.S. Cl.
CPC ...
252 / ; 175 69 ; 175 71 ; 210 58 ; 252180 ;
Abstract
A composition and method for drilling a well into a subterranean reservoir containing a high temperature aqueous liquid which composition contains as a scale inhibitor (i) a water-soluble substituted iminodi(methylene phosphonic acid) compound having a carbon-to-phosphorus bond or a water-soluble salt thereof, (ii) a dicarboxylic acid, (iii) a lower alkyl ester or hydroxy derivative of a dicarboxylic acid, (iv) hexamethylenetetramine, (v) thiourea, or (vi) the amide reaction product of a polycarboxylic acid and an aliphatic amine, an aliphatic hydroxyl amine, or a heterocyclic nitrogen-containing compound.