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. 07, 1981
Filed:
Jun. 18, 1979
Applicant:
Inventor:
Fred K Fox, Houston, TX (US);
Assignee:
Engineering Enterprises, Inc., Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; F03B / ; E21B / ;
U.S. Cl.
CPC ...
175107 ; 175 40 ; 415502 ;
Abstract
There is disclosed a turbodrill wherein excessive wear on the axial thrust bearing supporting the shaft from the housing is detectable at the surface by means of an increase in the back pressure of the drilling fluid circulating through the turbine section.