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:
Oct. 06, 1997
Filed:
Jul. 06, 1995
Applicant:
Inventors:
Hon Chung Lau, Houston, TX (US);
Arthur Herman Hale, Houston, TX (US);
Louis Anthony Bernardi, Jr, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
507140 ;
Abstract
Zinc oxide and zirconium oxide are used as weighting materials for water and oil based drilling fluids for horizontal wells.