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:
Jul. 27, 2021
Filed:
Mar. 28, 2019
Applicant:
Conocophillips Company, Houston, TX (US);
Inventor:
Peter Nelson Slater, Bartlesville, OK (US);
Assignee:
CONOCOPHILLIPS COMPANY, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/52 (2006.01); C02F 1/68 (2006.01); E21B 43/24 (2006.01); C02F 1/72 (2006.01); C02F 103/10 (2006.01); C02F 101/20 (2006.01);
U.S. Cl.
CPC ...
C02F 1/683 (2013.01); C02F 1/5245 (2013.01); E21B 43/2408 (2013.01); C02F 1/722 (2013.01); C02F 2101/20 (2013.01); C02F 2103/10 (2013.01); C02F 2305/023 (2013.01);
Abstract
A process for removing metals and chelators from SAGD liner flowback that can be implemented at the wellhead using temporary tankage and equipment. In the first step, caustic is added to the flowback until the concentration of hydroxyl ion is high enough for the metals (Fe, Ca, Mg) to dissociate from the metal-chelate complexes and precipitate as hydroxides. In the second step, hydrogen peroxide is added and allowed to react until all of the chelator molecules are oxidized and decomposed. Once treated, the flowback can proceed to the CPF.