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:
Mar. 05, 1991
Filed:
Apr. 06, 1990
Donald E Sable, Dallas, TX (US);
McClung-Sable Partnership, Dallas, TX (US);
Abstract
A centralizer for a pump rod string which minimizes the resistance offered thereby to flow of well fluids therepast having a body provided with two pairs of longitudinally and circumferentially spaced radially outwardly extending ribs and a circumferential area of reduced external diameter between the two pairs of ribs providing a circumferential line of reduced mechanical strength to minimize likelihood of occurrence of longitudinal cracks in the body of the centralizer and minimizing flaking of the body when the body is subjected to strains and stresses due to bending of the rod, on which it is rigidly mounted, about axes substantially perpendiculer to the longitudinal axis of the rod and also providing flow passages of increased area between the two pairs of ribs.