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:
Sep. 04, 2007
Filed:
Dec. 17, 2003
Applicant:
Frank Akselberg, Sandnes, NO;
Inventor:
Frank Akselberg, Sandnes, NO;
Assignee:
Bakke Oil Tools, AS, Algard, NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 34/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and a device for controlling a downhole hydraulic sequential control system () in which a number of pressure relief valves () are arranged to open sequentially directly or indirectly for corresponding actuators () through introduction of a hydraulic fluid, wherein the pressure of working fluid supplied to the control system is transmitted to hydraulic fluid in the control system (). The pressure transfer may be effected by means of a dividing piston ().