Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Don M. Hannegan0
Thomas F. Bailey0
Lev Ring0
James W. Chambers0
Date of Patent
April 23, 2019
0Patent Application Number
152827880
Date Filed
September 30, 2016
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A pressure control device for sealing about a tubular at a wellsite can include a rotatable member, at least two radial seals that sealingly contact the rotatable member, at least two fluid chambers, one chamber being exposed to the rotatable member between the radial seals, and a pump that pumps fluid between the chambers in response to rotation of the rotatable member. A method of operating a pressure control device at a wellsite can include providing at least two chambers in a bearing assembly of the pressure control device, and regulating pressures in the chambers via a valve system in communication with both of the chambers.
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