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. 17, 1987
Filed:
Nov. 25, 1985
Applicant:
Inventor:
David E Schneider, Houston, TX (US);
Assignee:
Weatherford U.S., Inc., Houston, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166153 ; 166202 ;
Abstract
A wellbore plug having a wiper disposed in inverted position which, in one embodiment, reinforces a conventionally disposed wiper of the plug. A plug wiper is provided which has a conventional cone-shaped portion and an opposing reinforcing portion, cone-shaped or otherwise. A plug wiper is provided which has no threads for mating with other parts of the plug, but which has a hollow recess for emplacing the wiper on a plug shaft.