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. 24, 1990
Filed:
Nov. 27, 1989
Applicant:
Inventor:
William W Dollison, Dallas, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166241 ;
Abstract
A sucker rod coupling comprising a body member and a plurality of axially and circumferentially spaced roller assemblies adapted to reduce friction and wear between the body member and the well tubing in which it is used, each roller assembly further comprising a plurality of rollers linked by a chain, each roller being adapted to rotate within the chain while the chain revolves around a roller guide connected to the body member.