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. 12, 2016
Filed:
May. 18, 2012
Applicant:
Mark Joseph Denny, Middlesex, GB;
Inventor:
Mark Joseph Denny, Middlesex, GB;
Assignee:
BP EXPLORATION OPERATING COMPANY LIMITED, Middlesex, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F03C 2/00 (2006.01); F03C 4/00 (2006.01); F04C 2/00 (2006.01); F04C 18/00 (2006.01); F04C 28/26 (2006.01); F04C 18/48 (2006.01); F04C 18/16 (2006.01); F04C 28/10 (2006.01); F04C 2/16 (2006.01); F04C 11/00 (2006.01); F04C 13/00 (2006.01); F04C 14/26 (2006.01); F04C 18/08 (2006.01);
U.S. Cl.
CPC ...
F04C 28/26 (2013.01); F04C 2/16 (2013.01); F04C 11/001 (2013.01); F04C 13/008 (2013.01); F04C 14/26 (2013.01); F04C 18/08 (2013.01); F04C 18/16 (2013.01); F04C 18/48 (2013.01); F04C 28/10 (2013.01); F04C 2210/24 (2013.01); F04C 2240/70 (2013.01);
Abstract
Pump having a pump inlet, a pump outlet, at least two threaded rotors and a pressure controlled valve. The pressure controlled valve is capable of controlling re-circulation of fluid from the pump outlet to the pump inlet. The pressure controlled valve can be a control valve. A multiple stage pump assembly is also provided having least two pumps arranged in series, in which at least one of the pumps is the aforementioned pump.