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:
Aug. 24, 1993
Filed:
Apr. 21, 1992
Applicant:
Inventor:
Bernd Reinholdt, Langenhagen, DE;
Assignee:
Weatherford/Lamb, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
1662417 ;
Abstract
A centralizer comprises two spaced-apart support rings connected by spring bows. Each support ring is provided with an internal groove. In use the centralizer is slid onto a pipe provided with two spaced-apart external grooves. When the internal grooves on the support rings overly the external grooves on the pipe a flexible stop ring is inserted through a window in the support rings into a space defined by the internal groove and the external groove. The internal groove on the support ring extends axially longer than the stop ring by an amount such that the spring bows can be pressed flat against the periphery of the pipe.