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. 08, 1995
Filed:
Mar. 11, 1994
Applicant:
Inventors:
Christophe A Malbrel, New York, NY (US);
Reza Hashemi, Sea Cliff, NY (US);
Assignee:
Pall Corporation, East Hills, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166300 ; 166304 ; 166312 ; 166384 ; 210732 ; 210733 ; 210747 ;
Abstract
A method of cleaning an oil or gas well includes mixing a caustic with a saline solution to precipitate hydroxide species from the saline solution and form a milky suspension. The suspension is contacted with contaminants in a well bore to entrap the contaminants. A polymeric flocculant is then mixed with the suspension in the well bore to aggregate the hydroxide species and the entrapped contaminants into flocs. The flocs are extremely strong and can withstand the highly turbulent flow existing in the well bore and can be readily flushed out of the well bore.