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. 18, 2009
Filed:
Dec. 22, 2005
Johann Huber, Traunwalchen, DE;
Johann Plank, Trostberg, DE;
Jürgen Heidlas, Trostberg, DE;
Gregor Keilhofer, Tacherting, DE;
Peter Lange, Obing, DE;
Johann Huber, Traunwalchen, DE;
Johann Plank, Trostberg, DE;
Jürgen Heidlas, Trostberg, DE;
Gregor Keilhofer, Tacherting, DE;
Peter Lange, Obing, DE;
BASF Construction Polymers GmbH, Trostberg, DE;
Abstract
Subject matter of the present invention is a drilling fluid additive based on sulfonated asphalt, which comprises a water soluble and anionic polymer component in quantities of 0.1 to 20 wt. %, with respect to the total additive in addition to the asphalt component. With this additive the water solubility of sulfonated asphalt can be markedly increased. This additive, whose polymer component is thermally highly stable, is utilized primarily in water- and/or oil-based drilling fluids and in particular in the exploration of subterraneous petroleum and natural gas deposits. Typical polymer components to consider are representatives of polycondensation products, such as phenol resins, ketone resins and sulfonated naphthalene, acetone and amino plasticizer resins (for example urea and melamine resins).