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:
Jul. 07, 1987
Filed:
May. 23, 1986
Applicant:
Inventors:
Bernard J Eastlund, Spring, TX (US);
Kenneth J Schmitt, The Woodlands, TX (US);
Ronald M Bass, Houston, TX (US);
Assignee:
Formation Damage Removal Corporation, Spring, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166248 ; 166 60 ; 166 651 ; 166302 ;
Abstract
The tubing of a cased petroleum well is heated for any purpose such as to prevent deposition of solids by coupling a microwave source to the well annulus at the surface and transmitting the waves down the annulus. Special coupling means is provided to couple at the annulus to accommodate the arbitrary positions of naturally occurring microwaves in the annulus of the well.