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. 05, 2006
Filed:
Jul. 18, 2003
Qi Qu, Spring, TX (US);
Paul H. Javora, Spring, TX (US);
Joel L. Boles, Spring, TX (US);
Sandra L. Berry, Tomball, TX (US);
Qi Qu, Spring, TX (US);
Paul H. Javora, Spring, TX (US);
Joel L. Boles, Spring, TX (US);
Sandra L. Berry, Tomball, TX (US);
BJ Services Company, Houston, TX (US);
Abstract
A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group —COH or —PO(OH)Ror a salt or ester thereof, —C(O)—, —OE, —SE, —N═C(R)R, EO—N═C(R)R, —N(R)R, and —N(C(O)R)Rgroup optionally substituted with a —COOH or —PO(OH)R20 or a salt or ester thereof, —SE or —OE group, wherein Rand Rare independently selected from E or forms, with nitrogen, phosphorous, oxygen or sulfur, a heterocyclic ring; E is Ror —H; Ris a C–Calkyl or aralkyl group or a derivative thereof and Ris —OH or R.