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. 18, 2017
Filed:
Dec. 13, 2016
Chevron U.s.a. Inc., San Ramon, CA (US);
CHEVRON U.S.A. INC., San Ramon, CA (US);
Abstract
Systems and methods quickly regulate hydraulic fluid pressure to meet hydraulic fluid demands in subsea equipment over long umbilicals. A hydraulic power unit includes a reservoir and a pump for pumping hydraulic fluid from the reservoir into a fluid supply line to subsea equipment. A supply-side module located downstream of the hydraulic power unit includes a circulation pump in communication with the supply line for circulating hydraulic fluid in a circuit including the fluid supply line and a fluid return line. A demand-side module is located upstream of the subsea equipment and includes a diverter valve for opening or closing the circuit. Adjustments can be made to the circulation pump and the diverter valve such that hydraulic fluid is circulated through the circuit. The pressure of the supply-side module is greater and does not exceed twice than the pressure of the demand-side module.