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:
Dec. 28, 2021
Filed:
Jul. 22, 2019
Halliburton Energy Services, Inc., Houston, TX (US);
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
Described herein are methods for controlling or limiting the deposition of inorganic sulfide scale in wellbore operations. In some cases, method can include introducing a treatment fluid including a cationic polymeric quaternary amine or a polyethyleneimine polymer into a treatment area of a wellbore having metal cations, such as iron, zinc, and/or lead cations, and sulfide anions and contacting the metal cations and sulfide anions with the treatment fluid to reduce or prevent formation of metal sulfide particles in the treatment area. The polymers can include poly(methacrylamido-4,4,8,8-tetramethyl-4,8-diaza-6-hydroxylnonamethylene dichloride), poly(vinylbenzyl trimethyl ammonium chloride), polydimethyldiallyl ammonium chloride, or quaternized ammonium salt polyethyleneimine.