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:
Dec. 15, 2015
Filed:
Apr. 13, 2011
Applicants:
Christian Leuchtenberg, Singapore, SG;
Alexander John Macgregor, Singapore, SG;
Inventors:
Christian Leuchtenberg, Singapore, SG;
Alexander John MacGregor, Singapore, SG;
Assignee:
Managed Pressure Operations PTE, Limited, Singapore, SG;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 33/06 (2006.01); E21B 33/08 (2006.01); E21B 21/08 (2006.01);
U.S. Cl.
CPC ...
E21B 33/06 (2013.01); E21B 21/08 (2013.01); E21B 33/085 (2013.01);
Abstract
A blowout preventer assembly comprising an annular blowout preventer having an annular packing unit and an actuator operable to reduce the internal diameter of the annular packing unit, wherein the assembly further comprises a stripping sleeve having a tubular elastomeric sleeve which in use is positioned generally centrally of the packing unit so that the packing unit surrounds at least a portion of the elastomeric sleeve.