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. 05, 2021
Filed:
Aug. 27, 2014
Applicant:
Enovate Systems Limited, Aberdeen, GB;
Inventor:
Stuart Ellison, Aberdeen, GB;
Assignee:
ENOVATE SYSTEMS LIMITED, Aberdeen, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 33/06 (2006.01); E21B 33/12 (2006.01);
U.S. Cl.
CPC ...
E21B 33/06 (2013.01); E21B 33/1208 (2013.01);
Abstract
An annular packer () for use with an annular blow out preventer () formed of a plurality of blades or elements () where each of the blades () is curved and arranged in the annular bore such that the curve of the blade is not parallel with the longitudinal axis of the assembly. This creates an 'iris' type of geometry which, as the iris closes, the annular bore () transforms from a parallel cylindrical shape to a smaller bore with a shape having at least one waist or pinch point () of smaller cross-section.