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:
Nov. 06, 1984
Filed:
Nov. 16, 1981
Applicant:
Inventor:
William R Garrett, Conroe, TX (US);
Assignee:
Smith International, Inc., Newport Beach, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21G / ;
U.S. Cl.
CPC ...
175195 ; 277 31 ; 166;84 ;
Abstract
A drilling head comprises a tubular body adapted for connection above a well head and having a removable side outlet with a replaceable wear bushing. An assembly removably secured in the head includes a stator and rotor with bearing means and rotating seal means therebetween. A replaceable tubular, kelly seal boot or stripper carried by the rotor includes an enlarged upper end which diverts drilling mud away from the rotating seal and toward the side outlet. Lubricating means is provided for the rotating seal.