Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Laurence John Ayling0
Date of Patent
August 7, 2007
0Patent Application Number
104425480
Date Filed
May 21, 2003
0Patent Primary Examiner
Patent abstract
Methods and apparati are disclosed for continuous circulation of drilling fluids while adding or removing tubulars to and from a drill string, and also for continuing drilling during the addition or removal of tubulars to and from the drill string.
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