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. 04, 1978
Filed:
Feb. 28, 1977
Applicant:
Inventor:
George E Lewis, Arcadia, CA (US);
Assignee:
Hydril Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166314 ; 175195 ; 251 / ; 277 31 ;
Abstract
Rotary blowout preventer apparatus includes: (a) an upright tubular body adapted to receive an annular packer to be constricted about a rotating well element, (b) and a rotary annular assembly carried in the body to rotate relative thereto and with the packer when the packer is constricted about said rotating element, said assembly including an actuator movable in the body to effect said constriction of the packer, (c) said assembly also including an annular head member having a shoulder located to receive vertical thrust exerted by the packer when the actuator effects constriction thereof.