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:
Feb. 24, 1998
Filed:
Jan. 11, 1996
Applicant:
Inventors:
Annie Audibert, Le Vesinet, FR;
Jean-Francedilla.ois Argillier, Suresnes, FR;
Assignee:
Institut Francais du Petrole, Rueil Malmaison, FR;
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166294 ; 175 72 ;
Abstract
In a drilling well, well completion, or well workover, the permeability of the walls is controlled by adding a predetermined amount of at least one hydrophobically modified guar gum derivative, e.g., a hydrophobically modified hydroxypropyl guar (HMPG), so as to reduce the amount of filtrate lost through the walls. The fluid may also include viscosifiers such as polymers or reactive clay.