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:
Apr. 12, 2016
Filed:
May. 11, 2005
Wenlin Zhang, Ridgefield, CT (US);
Terizhandur S. Ramakrishnan, Bethel, CT (US);
Joseph Walter, Sugar Land, TX (US);
Albert Perez, Jr., Danbury, CT (US);
Wenlin Zhang, Ridgefield, CT (US);
Terizhandur S. Ramakrishnan, Bethel, CT (US);
Joseph Walter, Sugar Land, TX (US);
Albert Perez, Jr., Danbury, CT (US);
Schlumberger Technology Corporation, Ridgefield, CT (US);
Abstract
A rechargeable power system comprising: a drill string configured to operate in a well bore, the drill string comprising: a fuel cell system; a generator in electrical communication with the fuel cell system; a turbine, configured to rotate due to an impingement of drilling mud on one or more turbine blades, the turbine in operable communication with the generator; and where the fuel cell system is configured to provide power at least when drilling mud is not circulating in the well bore, and further configured to be recharged by the generator when drilling mud is circulating in the well bore. A method for operating a rechargeable downhole fuel cell. The method comprises: monitoring a fluid supply pressure; determining whether the fluid supply pressure is below a threshold value; and stopping a fuel cell discharge if the fluid supply pressure is below the threshold value.