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:
Jun. 19, 2018
Filed:
Oct. 05, 2012
Weatherford Technology Holdings, Llc, Houston, TX (US);
Thomas F. Bailey, Houston, TX (US);
Danny W. Wagoner, Cypress, TX (US);
James W. Chambers, Hackett, AR (US);
Andrew A. W. Barry, Missouri City, TX (US);
Simon J. Harrall, Houston, TX (US);
Weatherford Technology Holdings, LLC, Houston, TX (US);
Abstract
Rotating control device related oilfield pressure control is accomplished by upper and lower seal members configured to seal around a tubular, a chamber defined between the upper and lower seal members; and wherein fluid enters and/or exits the chamber via some device or structure. Such a device or structure could be a relief valve, a first accumulator, a pressure control valve, an orifice, and/or a void space in a seal member in a location which contacts the tubular.