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:
Jan. 12, 1982
Filed:
Apr. 04, 1980
Applicant:
Inventors:
Bolie C Williams, III, Houston, TX (US);
Richard M Church, Jr, Houston, TX (US);
Assignee:
Cameron Iron Works, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
251 / ; 251-5 ; 277103 ; 2771 / ; 2772 / ;
Abstract
An annular blowout preventer having a housing with a vertical bore therethrough, a packer including a resilient annulus and upper and lower series of irising metal inserts adapted to increase the support for the annulus when it is compressed axially to constrict the vertical bore and an annular piston movable in the housing to apply an axial compression load to the packer.