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. 08, 1998
Filed:
Mar. 17, 1997
Applicant:
Inventor:
Christopher Alan Sawdon, Cornwall, GB;
Assignee:
Dowell, a division of Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; B21B / ;
U.S. Cl.
CPC ...
507103 ; 507905 ; 507910 ; 252 / ; 252 / ; 252 / ; 175 65 ; 175 66 ; 175 69 ; 175 70 ;
Abstract
The invention concerns wellbore fluids suitable for use in the oil and gas exploration and production industries and embraces fluids used for drilling, completion, workover or packing of wellbores. The invention is especially concerned with biodegradable wellbore fluids the liquid phase of which consists of an oil, or of water-in-oil 'invert' emulsions, where the oil phase comprises n-alkanes.