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:
Apr. 26, 1977
Filed:
Dec. 31, 1975
Applicant:
Inventor:
Fred K Fox, Houston, TX (US);
Assignee:
Engineering Enterprises, Inc., Houston, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
175107 ; 175228 ; 308D / ; 415502 ;
Abstract
There are disclosed several embodiments of a well tool which is adapted to be connected as part of a pipe string through which drilling fluid is circulated, and which comprises inner and outer members which are rotated with respect to one another by a motor between them.