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:
Jul. 24, 1984
Filed:
Jun. 25, 1981
Applicant:
Inventors:
Wai Huey, Los Angeles, CA (US);
Fernando Murman, Rancho Palo Verdes, CA (US);
Eugene Matsuda, Laguna Hills, CA (US);
Assignee:
Hydril Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
251 / ; 277121 ;
Abstract
A well blowout preventer packer unit is characterized by long life, and induced back to front (radial) rubber feeding between metallic inserts to close on well pipe for producing a pressure gradient against the pipe which is greatest at the bottom of the packer extent engaging the pipe, and lowest at the top of the packer extent engaging the pipe.